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On May 19, the delegation from the Malaysia Guizhou International Trade Chamber of Commerce and representatives from Guizhou Yima Cross-border Trade Co., Ltd. visited our company for an inspection tour. The primary objective of this visit was to deepen bilateral economic and trade exchanges between Guizhou and Malaysia, with the aim of introducing our leading industrial by-product gypsum resource utilization technology and semi-dry gypsum block continuous production equipment to the Malaysian market. Accompanied by our team, the delegation toured the production workshop on-site, observing in detail the entire workflow from raw material automatic weighing and mixing to high-pressure molding and automatic palletizing. Our technical team demonstrated to the clients the significant advantages of the semi-dry continuous production process over traditional casting methods, specifically regarding production efficiency, energy consumption, environmental protection, product performance, and full life-cycle costs. They spoke highly of our technology’s ability to effectively address industry pain points such as the "difficulty in consuming" and "low added value" of industrial by-product gypsum. They expressed that this technical solution aligns closely with Malaysia's current urgent demand for green, low-carbon building materials, and our patented equipment demonstrates strong market competitiveness.   During the subsequent exchange session, both parties agreed to establish a close cooperative relationship to jointly promote the substantive implementation of gypsum block production projects and solid waste resource utilization in Malaysia. Simultaneously, leveraging cross-border trade channels, we aim to build a new win-win landscape characterized by a "Technology + Trade" model.    

On May 12, a delegation of Turkish clients visited our production base for an inspection tour. Both parties engaged in in-depth discussions regarding industrial by-product gypsum recycling​ and semi-dry gypsum block continuous production technology, reaching a preliminary consensus on equipment performance and market cooperation.   Site Visit: Witnessing Efficiency and Sustainability. Our technical team guided the guests through the entire production line, providing a detailed demonstration of the fully automated process—from raw material weighing and mixing to twin-press molding and automatic palletizing. We highlighted the equipment's core technical parameters and its proven operational stability.     Addressing the client's key concerns, we conducted a comparative analysis demonstrating that our semi-dry technology significantly outperforms traditional pouring processes in terms of production efficiency, energy conservation, environmental protection, product quality, and life-cycle costs. The clients spoke highly of the technology’s capability to solve industry pain points, specifically the "difficulty in large-scale consumption" and "low added value" often associated with industrial by-product gypsum. The clients noted that with the surging demand for green and low-carbon building materials in the Turkish market, our semi-dry continuous production technology demonstrates significant market competitiveness. Both parties have confirmed their intention to advance substantive cooperation in Turkey, focusing on gypsum block production projects and broader solid waste resource utilization initiatives.      

                                           Zunyi Hanfeng Secures New Strategic Partnership   June 27, 2025 – The "Advanced Phosphogypsum Utilization Technology Exchange & Supply-Demand Matching Conference", hosted by the China Phosphate & Compound Fertilizer Industry Association, supported by the Hubei Provincial Department of Economy and Information Technology, and organized by the Jingmen Municipal Bureau of Economy and Information Technology, was successfully held in Jingmen, Hubei. Attendees included representatives from the Ministry of Industry and Information Technology (MIIT), local government agencies, industry associations, phosphogypsum producers, recycling enterprises, and research institutions. Mr. Wang Peng, Director of the Energy Conservation and Comprehensive Utilization Department of MIIT, delivered a keynote speech. Zunyi Hanfeng Decoration Materials Co., Ltd. (Zunyi Hanfeng) was invited as a key participant.   At the conference, Zunyi Hanfeng showcased its latest innovations in phosphogypsum recycling, including: ​Fully automated semi-dry phosphogypsum block continuous production technology & equipment​ ​Non-calcined phosphogypsum application technology for non-residential construction materials​ ​Phosphogypsum-based green residential building material solutions​ ​Jointly developed "Smart Equipment Cloud Platform" for unmanned workshops​ These advancements align with the "National Catalogue of Advanced Industrial Resource Recycling Technologies and Equipment (2023 Edition)". Notably, Zunyi Hanfeng has achieved breakthroughs in ​semi-dry process technology, significantly improving phosphogypsum recycling efficiency and expanding application scenarios, drawing widespread attention from attendees, research institutions, and industry peers. Zunyi Hanfeng’s technical team provided in-depth explanations of the technologies and shared practical case studies, engaging in discussions on high-value phosphogypsum utilization pathways and future trends. The company’s ​cutting-edge and practical solutions​ were highly commended. During the ​supply-demand matching session, Zunyi Hanfeng signed a ​strategic cooperation agreement​ with Hubei Beibang New Materials Co., Ltd. Both parties will deepen collaboration in ​R&D, technology commercialization, and market expansion, leveraging their respective strengths in technology, resources, and distribution channels to accelerate the ​industrialization of phosphogypsum recycling​ and explore new models for a ​green circular economy. This partnership marks a ​milestone in industry collaboration, setting a benchmark for synergistic innovation. The event served as a ​highly effective platform​ for knowledge exchange and business matching, fostering deeper integration of ​industry, academia, research, and application. Moving forward, Zunyi Hanfeng will continue to drive innovation, implement the MIIT’s "Phosphogypsum Comprehensive Utilization Action Plan", and strengthen partnerships across the supply chain to ​enhance phosphogypsum recycling efficiency, reduce industrial waste, and promote large-scale, high-value utilization. The company remains committed to supporting the ​green transformation of the phosphorus chemical industry​ and contributing to ​China’s "Dual Carbon" goals. June 28, 2025(Zunyi Hanfeng Decoration Materials Co., Ltd.)  

Recently, the Department of Science and Technology of the Ministry of Industry and Information Technology (MIIT) officially announced the First List of Advanced Applicable Technologies. The independently developed "Integrated Technology for Phosphate Gypsum Upgrading via Multi-Stage Counter-Current Water Washing and Modification" by China Wuhuan Engineering Co., Ltd. has been successfully included in the list.   In November 2024, the General Office of MIIT issued the Notice on Launching the Selection of Advanced Applicable Technologies (First Batch), aiming to accelerate the promotion and application of advanced technologies and drive the manufacturing industry toward high-end, intelligent, and green development. The selection followed strict procedures, including voluntary application, formal review, and expert evaluation.   Chuxing Chemical’s phosphate gypsum washing, purification, and harmless treatment project. (Photo by Chen Xiangyu, Correspondent of Changjiang Daily)   It is reported that China Wuhuan Engineering developed this technology to address critical industry challenges such as environmental pollution and extensive land occupation by phosphate gypsum. The technology achieves efficient, harmless treatment of phosphate gypsum, eliminates potential ecological contamination risks, and innovatively transforms waste phosphate gypsum into reusable resources.   Currently, China Wuhuan Engineering has applied the technology across multiple engineering projects with remarkable results. It significantly conserves natural gypsum resources, reduces waste, minimizes land usage for phosphate gypsum stockpiling, and pioneers green, low-carbon transformation in the industry. The company has established over 10 phosphate gypsum harmless treatment production lines, with an annual processing capacity of 20.75 million metric tons. This advancement strongly propels China’s phosphorus chemical industry to world-leading levels in green development.   Excerpt from Changjiang Daily (Correspondent Chen Xiangyu, Reporter Chen Qixiong)      

 —Government-Enterprise-Research Collaboration Explores New Pathways for                                                   Green Transformation of Phosphogypsum   May 22-23, 2025, Zunyi, Guizhou—The "Innovative Technology Exchange Conference on High-Value Utilization of Phosphogypsum & 2025 Hanfeng Strategic Upgrade Release Event," hosted by Zunyi Hanfeng Decoration Materials Co., Ltd., was grandly held at the Zunyi Zunshang International Hotel. With the theme "Technological Innovation Drives a Green Future," the conference brought together 24 representatives from 13 leading industry enterprises, the Hu'nan Environmental Protection Science Research Institute, and the National Engineering Research Center of Changsha University of Science and Technology to discuss breakthroughs in phosphogypsum utilization technologies and industrial upgrade strategies.                                        Focus on Technological Innovation and Industrial Upgrade   On the afternoon of May 22, attendees arrived at Zunyi High-Speed Railway Station, where they were greeted by the host organization and assisted with check-in and accommodation. At 9:00 AM on May 23, the event officially commenced. In his opening speech, Feng Xinchao, Chairman of Zunyi Hanfeng, stated: "We firmly believe that only through open collaboration and shared benefits can phosphogypsum truly transition from an 'environmental burden' to a 'green asset.'"   Ge Bin, Deputy Director of the National High-Tech Zone Management Committee of Zunyi City, emphasized the government’s commitment to optimizing policy frameworks to support enterprises in transforming phosphogypsum from "solid waste" into a "resource," thereby advancing the goal of building "zero-waste cities."                                           Technological Breakthroughs and Industry-Academia Synergy   Professor Chen Qianlin, Dean of the Advanced Technology Research Institute at Guizhou University, delivered a keynote speech titled "Green Utilization of Phosphogypsum." He systematically analyzed the challenges of phosphogypsum stockpiling, introduced green preparation technologies for phosphogypsum powder, and highlighted successful applications of anhydrous/mixed-phase gypsum. He also proposed the ​"Dihydrate/Anhydrous Wet-Process Phosphoric Acid Co-Production Technology," which converts byproduct gypsum into anhydrous gypsum ore without external heat sources. This innovation achieves higher fluorine overflow rates, enhanced phosphorus recovery, reduced residual phosphorus/fluorine content, superior product stability, and significantly lowers energy consumption and production costs compared to traditional methods.   Chen Zhengqiang, Senior Technical Director of Zunyi Hanfeng, unveiled the ​"Non-Calcined Phosphogypsum-Based Non-Residential Building Materials Technology," detailing the company’s fully automated semi-dry process for continuous phosphogypsum block production. He emphasized the extension of this technology to non-residential building materials under China’s "Quality Housing" policy framework, marking another milestone in high-value phosphogypsum utilization. Additionally, Sales Vice President Feng Yun presented "Breakthroughs in Semi-Dry Process Equipment: Revolutionizing the Phosphogypsum Building Materials Industry," showcasing how Hanfeng’s proprietary equipment achieves over 99.8% phosphogypsum incorporation rates, offering cost-effective solutions for the industry. ​On-Site Demonstration of Technological Advancements                                           On-Site Demonstration of Technological Advancements   Participants visited Zunyi Hanfeng’s production facility to observe the semi-dry process equipment in operation. The fully automated and continuous production line boasts an annual phosphogypsum processing capacity of 120,000 tons, with products meeting industry-leading standards in fracture load and compressive strength. ​                                                  Strategic Upgrade and Collaborative Agreements   At 2:00 PM, Cai Peichen, Founder of Shanghai Minimalist Growth Management Consulting Co., Ltd., deliver an impassioned speech titled ​"Strategic Upgrade and Collaborative Development." Using the case of partner company YouleBang, he underscored the importance of integrating ​"technological iteration+policy alignment+solution synergy" to drive industry trends.   During the signing ceremony, Zunyi Hanfeng formalized long-term cooperation agreements with five enterprises, covering technology sharing, market expansion, and joint R&D. This marked a concrete step toward industrial chain collaboration in phosphogypsum utilization. ​                                            Vision: Building a Green Circular Industrial Ecosystem   In the free discussion session, attendees unanimously agreed that phosphogypsum utilization must balance large-scale consumption and high-value development, accelerating technology commercialization through cross-sector collaboration.   The event not only highlighted Hanfeng’s technological leadership but also provided a replicable model for the industry’s green transformation. As Chairman Feng Shenchao concluded: ​"Green development has no bystanders—everyone is a participant in the resource revolution!"   Submitted by: Zunyi Hanfeng Decoration Materials Co., Ltd. Text: Hanfeng Network Center ​           Photos: Event Team  

(On May 13, 2025, Zunyi Hanfeng Decorative Materials Co., Ltd.)   On May 13, 2025, the "Zunyi Decoration and Renovation Industry High - Quality Development and Member Exchange Working Conference" was grandly held at Zunyi Hanfeng Decorative Materials Co., Ltd. The conference was sponsored by the Zunyi Building Decoration Association and organized by Zunyi Hanfeng Decorative Materials Co., Ltd. It attracted nearly 60 participants, including industry association leaders, enterprise representatives, experts and scholars, and new member units. They had in - depth exchanges around topics such as industry innovation, compliant operation, and technology application, and jointly explored new paths for high - quality development.       Anchoring the Direction: Policy Guidance and Industry Appeal   At the beginning of the conference, Feng Xinchao, the chairman of Zunyi Hanfeng Decorative Materials Co., Ltd., delivered a welcome speech. He said that as a resource - comprehensive - utilization enterprise focusing on the comprehensive utilization of phosphogypsum for 25 years, they always keep in mind the corporate mission of "reviving solid waste and empowering construction". With technological innovation and green development as the core concepts, they have jointly established a technological innovation consortium. They carry out targeted R & D cooperation to meet the "good house" standard requirements such as heat and sound insulation of building houses and the decoration of special - shaped spaces. They also build demonstration projects, giving priority to the application of phosphogypsum green building materials in urban renewal and decoration projects, promoting the R & D and application of new building materials such as phosphogypsum, and contributing to the realization of the "Double Carbon" goal.                     Ma Jing, the executive vice - president of the Zunyi Building Decoration Association, emphasized in her speech that it is necessary to seize the trends of existing housing renovation, intelligentization, and environmental protection, promote technology - enabled development and standardization construction. She called on enterprises to abandon low - price competition, build their reputation with integrity and quality, pay attention to the cultivation of craftsmen, and operate in compliance, so as to jointly build a healthy ecological environment and meet the people's needs for a better life.                   Qian Yong, the section chief of the Quality and Safety Section of the Zunyi Housing and Urban - Rural Development Bureau, put forward requirements in line with the policy direction. He pointed out that the industry needs to strictly implement the responsibility for work safety, strengthen the construction of the quality supervision system, and at the same time advocate "anti - involution competition". "It's not a real achievement for one company to monopolize the market. It's more important to come up with new technologies and good ideas that can help all enterprises in the industry make progress and develop together. This is what business owners should think about."     Building Consensus: Learning the Spirit and Industry Initiatives   At the conference, Tian Maofu, the secretary - general of the Zunyi Building Decoration Association, read out the "Initiative on Resisting 'Involution Competition' and Promoting the Benign Development of the Home Decoration Industry" issued by the China Building Decoration Association, calling on enterprises to abandon low - price vicious competition, focus on service innovation and quality improvement, safeguard the rights and interests of consumers, and jointly build a healthy market environment.   Empowering Development: Technological Frontiers and Compliance Escort   In the special - topic sharing session, Chen Zhengqiang, the technical director of Zunyi Hanfeng, gave a presentation titled "The Application and Development Direction of Phosphogypsum in New Building Materials". He systematically introduced the technological breakthroughs and industrialization achievements of phosphogypsum resource utilization. He said that in combination with China's "Double Carbon" goal and the concept of "good house" construction, he analyzed the key technologies, current industrial application status, and future development directions of phosphogypsum in the field of new building materials, explored the promoting role of its large - scale application in the green and low - carbon transformation of the construction industry, and proposed the path of collaborative innovation in the industrial chain.     Rao Hai, a practicing lawyer from Guizhou Yingqingyun Law Firm, focused on "Analysis of Legal Risk Prevention and Compliance Operation Practice in the Home Decoration Industry". Through the analysis of typical cases, he dissected common problems such as contract disputes and employment risks, and put forward suggestions for compliant operation, providing professional guidance for enterprises to avoid legal risks.   Working Hand in Hand: New Member Accreditation and On - site Observation     During the conference, a new member enterprise accreditation ceremony was held. Ma Jing, the executive vice - president of the Zunyi Building Decoration Association, and Tian Maofu, the secretary - general of the association, accredited 9 newly - joined enterprises, marking the further expansion of the industry team and the continuous improvement of resource integration capabilities.   After the conference, Hanfeng led all the participants to visit the intelligent production workshop, product exhibition hall, and R & D experimental center of Zunyi Hanfeng Company. The participants got a close - up look at the phosphogypsum building materials production line and the application scenarios of environmental protection products. The visitors highly praised the technical strength and innovation achievements of Hanfeng Company. This conference took "anti - involution competition" and "good house" as the main threads Through policy interpretation, technical discussions, legal empowerment, and on - site exchanges, it clarified the development direction for the Zunyi decoration and renovation industry and gathered development momentum. The participating representatives said that they would work hand in hand, take innovation - driven development and compliant operation as the two wings, and jointly write a new chapter in the high - quality development of the Zunyi home decoration industry!

 01 Preparation of Underground Filling Materials from Phosphogypsum The phosphogypsum filling technology utilizes phosphogypsum as the primary raw material. By incorporating cementitious materials or other admixtures (such as quicklime, steel slag, etc.), and adding water for stirring to form a homogeneous mixed slurry, it is backfilled into the goafs of underground mines. After solidification and hardening, the slurry supports the roof of the underground goafs, preventing surface subsidence and enabling the safe and efficient recovery of resources.   In March 2024, Guizhou Phosphorization Group Green Environmental Protection Industry Co., Ltd., in collaboration with Central South University, developed an anhydrite-based cementitious agent slurry. This slurry can effectively stabilize voids within mines, prevent the occurrence of geological disasters like surface collapse, and has the capacity to consume over 100,000 tons of phosphogypsum annually. 02 Application of Phosphogypsum in Soil Improvement Phosphogypsum generated by the wet-process phosphoric acid process contains heavy metals such as Cd, Cr, and Pb, radioactive pollutants, and also suffers from excessive fluorine content, posing pollution risks to agricultural soil. Therefore, harmless treatment is essential before its utilization. Once treated harmlessly, phosphogypsum is rich in elements like calcium and phosphorus, which can promote plant growth, development, and fruit ripening.   Yunnan Agricultural University and Kunming Chuanjinnuo Chemical Co., Ltd. conducted a pilot demonstration of phosphogypsum modification for land reclamation in Lvmao Village, Tongdu Town, Dongchuan District, Kunming City. Data from the two-year pilot test revealed that through the soil utilization of modified phosphogypsum, stony desertified land was successfully transformed into high-quality arable land. Moreover, the soil fertility indicators of the test fields significantly improved. The total phosphorus and fluoride levels in the surface runoff of the demonstration fields showed no significant differences compared with those of surrounding ordinary arable land, and the quality of seepage water met the Class III standards specified in the *National Groundwater Quality Standard* (GB/T 14848).  03 Backfilling of Phosphogypsum for Ecological Restoration In September 2024, the ecological restoration pilot project of Hubei Dayukou Company, a subsidiary of CNOOC Chemical Co., Ltd., commenced at the construction site of the Chupishan Phosphogypsum Dry Stacking Warehouse Project. This event marked the official launch of China's first project to undertake mine ecological restoration and research using the dihydrate phosphogypsum cemented backfilling process.   This project employs harmlessly treated phosphogypsum, supplemented with cementitious materials, to conduct cemented filling in the ecological restoration area downstream of the initial dam of the Chupishan Phosphogypsum Dry Stacking Warehouse Project in Dayukou. As the first project in China to adopt the dihydrate phosphogypsum cemented backfilling process for mine ecological restoration and research, as well as one of the pilot projects in Jingmen City for applying phosphogypsum in mine ecological restoration, it is expected to recycle approximately 2 million tons of phosphogypsum. 04 Preparation of Road-building Materials from Phosphogypsum In road engineering, phosphogypsum is primarily applied to the base course and subgrade. It contains fine particles required for base course materials and calcium sulfate dihydrate necessary for the hydration and hardening of cementitious materials, thus fulfilling the functions of aggregate filling and cementitious solidification. Using phosphogypsum in road construction not only enables the large-scale consumption of phosphogypsum but also reduces the amount of cement used, significantly lowering road construction costs and yielding remarkable social and economic benefits.   In November 2024, with the support of Hubei Communications Investment Group, Hubei Provincial Transportation Planning and Design Institute, and other entities, Huangmailing Holding Group collaborated with Hubei Liantou Road & Bridge Co., Ltd. Phosphogypsum was crushed, metered, mixed with cement and curing agents, and stirred again, then used as a road base material to replace traditional water-stable crushed stone in the first contract section of the Hubei section expansion project of the Beijing-Hong Kong-Macao Expressway. This represents the first application of phosphogypsum in the paving of high-grade highways in Hubei Province, with the potential to consume thousands of tons of phosphogypsum per kilometer.  05 Preparation of Gypsum-based Building Materials from Phosphogypsum The utilization of phosphogypsum to produce building material products is one of the most prevalent approaches to phosphogypsum application. The *Action Plan for the Comprehensive Utilization of Phosphogypsum* explicitly advocates promoting the production of products such as cement retarders, gypsum mortars (including plastering gypsum, self-leveling gypsum, etc.), gypsum panels, Type II anhydrite and its products, high-precision gypsum blocks, building decoration materials, and prefabricated composite building materials using phosphogypsum as the raw material. In May 2023, Guizhou Phosphorization Green Environmental Protection Industry Co., Ltd. established the world's first production line for Type II anhydrite with an annual output of 300,000 tons. In November 2024, in the supporting infrastructure and commercial housing project of the Green Manufacturing Industrial Park in Nanming District, 4 out of 8 proposed buildings were constructed using anhydrite self-leveling mortar produced by Guizhou Phosphorization Group. The application area amounted to approximately 100,000 square meters, with an estimated consumption of 8,000 tons. This milestone signifies significant progress in the large-scale engineering application of anhydrite self-leveling mortar by Guizhou Phosphorization Group. This product is mainly used for indoor floor leveling. After hydration, it exhibits excellent strength stability, water resistance, and enhanced crack resistance. Its flatness and construction efficiency outperform those of traditional cement-based self-leveling materials, and it is free from issues such as cracking and bulging caused by shrinkage. 06 Preparation of Cement Retarders from Phosphogypsum Phosphogypsum contains impurities like phosphorus and fluorine, which can significantly extend the setting time of cement. After undergoing purification, impurity removal, and modification, phosphogypsum can be utilized as a cement retarder. Common pretreatment methods include water washing, quicklime neutralization, and calcination.   In May 2024, at the site of the 600,000-ton-per-year phosphogypsum comprehensive utilization technical transformation project of Lvyang Building Materials Company, a subsidiary of Tongling Liuguo Chemical Co., Ltd., three autoclave units were being installed, while the construction of the high-quality cement retarder finished product workshop was also underway. The first-phase project is expected to be completed and put into operation in June of the same year. Upon completion of both phases, the project will achieve an annual production capacity of 300,000 tons of high-quality cement retarder and 30,000 tons of gypsum mortar, enabling the annual utilization of 600,000 tons of phosphogypsum by-products from Liuguo Chemical Co., Ltd., and delivering notable environmental and economic benefits. 07 Simultaneous Production of Sulfuric Acid and Cement from Phosphogypsum In the raw material processing stage, phosphogypsum undergoes pressure filtration and drying to be transformed into hemihydrate gypsum. Subsequently, hemihydrate gypsum is blended with ingredients such as silica, bauxite, and coke, and then decomposed and calcined in a rotary kiln to produce cement clinker. The sulfur dioxide gas generated during the decomposition and calcination of gypsum is channeled to the sulfuric acid production line as a raw material. In March 2024, the world's largest facility for the decomposition of phosphogypsum to simultaneously produce sulfuric acid and cement, invested and constructed by Guizhou Phosphorization Group, successfully completed its initial feeding and commissioning. Covering an area of approximately 200,000 square meters, this facility has an annual capacity to consume 1.4 million tons of phosphogypsum, produce 600,000 tons of sulfuric acid, and 800,000 tons of cement, ranking first globally in terms of scale. Leveraging phosphogypsum as the raw material, the facility can produce sulfuric acid with a concentration of 98% and cement, both of which meet the required standards. The sulfuric acid can be recycled to the upstream process for phosphoric acid production, while the cement can be sold externally or applied in mine filling.     Source: National Solid Waste Technology Information Sharing PlatformEditor: Ma XiaoruReviewer: Wang MeihongSupervisor: Jiang Shanjun    

Recently, nine research and development projects in 2024 of the Green Environmental Protection Industry Co., Ltd. under Guizhou Phosphorus Chemicals Group have passed the final acceptance inspection. Among them, six achievements have realized technological transformation and entered the mass production stage. These technological breakthroughs mark an important progress in the resource utilization of phosphogypsum by Guizhou Phosphorus Chemicals Group, providing innovative solutions for solid waste treatment and the development of green building materials.   The nine projects accepted this time cover key topics such as "Research on the Expansion of Large-scale Application of Anhydrite" and "Development and Industrial Application of the Masonry-type Fully Assembled Gypsum Wall (Component)", forming a complete technology chain from raw material preparation, material modification to end products. Through methods such as listening to reports and conducting inquiries and discussions, the expert group determined that the relevant technological achievements meet the conditions for industrialization, and some products have achieved large-scale production.                                           Samples of Anhydrite Packaging Boxes   Among them, six products, including anhydrite packaging boxes and gypsum-based self-leveling materials, have entered the mass production stage and are expected to be promoted and applied in industries such as logistics and construction. These technological breakthroughs not only improve the comprehensive utilization rate of phosphogypsum but also promote the improvement of the industry standard system, providing a systematic solution for the high-value utilization of phosphogypsum. Through the cooperation model of industry, university and research institute, the Green Environmental Protection Company and the team of Academician Qu Jinping from South China University of Technology jointly established a joint laboratory, successfully overcoming key technologies such as the development of functional masterbatches of phosphogypsum and the molding of ultra-high molecular weight polyethylene pipes. At present, Type II anhydrite and its products, high-precision gypsum blocks, building decoration materials, and prefabricated composite building materials products have been selected into the Recommended Catalogue of the Action Plan for the Comprehensive Utilization of Phosphogypsum, providing a solution from Guizhou Phosphorus Chemicals Group for solving the difficult problem of the resource utilization of phosphogypsum.

The comprehensive treatment of phosphogypsum is a worldwide challenge. Currently, the main disposal method is stacking. A large amount of stacked phosphogypsum not only occupies land resources and poses potential ecological and environmental safety risks, but also restricts the green and sustainable development of the phosphate chemical industry. Yunnan Province is one of the important bases for phosphorus resources, phosphate fertilizers, and phosphate chemicals in China. By combing through the current situation and existing problems of the comprehensive utilization of phosphogypsum in Yunnan Province, this paper puts forward suggestions such as strengthening the reduction of pollutants in production, promoting the harmless treatment of phosphogypsum, implementing coordinated development of the entire industrial chain, consolidating the main responsibility of enterprises, driving innovation through missions and scenarios, expanding comprehensive utilization approaches, establishing a collaborative and linkage mechanism among multiple departments, and strengthening overall coordination and supervision. These suggestions aim to provide references for further promoting the reduction, resource utilization, and harmless treatment of phosphogypsum, and facilitating the resource - conservation and green development of the phosphate chemical industry.   Increase Financial Subsidy Support and Promote the “Utilization - Driven Production” of Phosphogypsum   Yunnan Province gives full play to the leading role of fiscal funds in leveraging: To support enterprises in enhancing the comprehensive utilization of phosphogypsum, the Department of Industry and Information Technology of Yunnan Province implements the “utilization - driven production” policy. For enterprises that utilize more than 50,000 tons of phosphogypsum annually, the government and phosphate chemical enterprises jointly provide a financial subsidy of 30 to 70 yuan per ton. It also guides enterprises to strive for central financial support. In 2022, the comprehensive utilization project of phosphogypsum by Sinochem Yunlong Co., Ltd. received 4.4 million yuan of investment support from the central budget. Moreover, the provincial - level financial support has been strengthened. In 2021 and 2022, the provincial special funds for industrial and information technology development provided financial support to 6 comprehensive utilization projects of phosphogypsum. In 2023, departments such as the Department of Housing and Urban - Rural Development of Yunnan Province included phosphogypsum comprehensive utilization projects in major project databases at all levels. Enterprises that use phosphogypsum as a raw material to produce related materials can enjoy a tax refund of 70% as a tax preference. Continuously Strengthen Industry Supervision and Improve the Risk Management Ability of Phosphogypsum   Yunnan Province has been deeply promoting the concentrated campaign against environmental pollution caused by phosphogypsum and strengthening environmental supervision over the stacking and comprehensive utilization of phosphogypsum. On the one hand, it strictly implements the "Notice of the General Office of the Ministry of Ecology and Environment on Doing a Good Job in the Environmental Impact Assessment and Discharge Permit Management of 'Three Phosphorus' Construction Projects". It requires that phosphate fertilizer construction projects should implement the principle of "production determined by utilization", that is, the production volume of wet - process phosphoric acid is determined by the comprehensive utilization volume of phosphogypsum. The comprehensive utilization channels of phosphogypsum should be implemented. For cases where comprehensive utilization is not smooth, the existing phosphogypsum storage yards can be used for stacking, and no new or expanded phosphogypsum storage yards are allowed. Phosphogypsum storage yards, tailings ponds, and temporary storage sites should take measures such as anti - seepage and groundwater drainage according to the requirements for the disposal of Class II general industrial solid waste, and construct groundwater monitoring wells for daily monitoring to prevent groundwater environmental pollution. On the other hand, multiple departments in the province have joined forces to carry out several rounds of inspections of environmental risk hazards at enterprises and stacking sites related to phosphogypsum, to find out the quantity, distribution, environmental management status, and environmental management risks of phosphogypsum, and to urge and guide enterprises with problems to formulate and implement rectification measures. In addition, the Department of Ecology and Environment of Yunnan Province and the Department of Industry and Information Technology of Yunnan Province take the lead in promoting the informatization management of phosphogypsum and the construction of "transparent" storage yards, urging and guiding enterprises to truthfully record information such as the generation quantity, flow direction, storage, utilization, and disposal of phosphogypsum, and to publicly disclose pollution prevention information such as enterprises and stacking sites, monitoring data, and responsible persons.   Strengthen the Reduction of Pollutants in Production and Promote the Harmless Treatment of Phosphogypsum   National and provincial policies and technical specifications should be used to promote the optimization and upgrading of the phosphate chemical industry. Strict control should be exercised over the increase at the source, the absorption of existing quantities, improvement of quality, and achievement of dynamic balance, and the harmless modification of phosphogypsum should be advanced with high standards and high quality. Firstly, coordinate the development and protection of phosphate ore resources, strengthen the production and construction management of phosphate ore, promote new ore - dressing processes, enhance the utilization of medium - and low - grade phosphate ores, and the development of associated resources such as silicon, fluorine, and magnesium, so as to improve the utilization rate of phosphate ore resources. Secondly, apply the phosphogypsum pretreatment technology coupled with the wet - process phosphoric acid process to improve the purification treatment process level of phosphogypsum, reduce the generation of pollutants, enhance the quality of phosphogypsum, and decrease the discharge volume of phosphogypsum and the difficulty of its comprehensive utilization. Thirdly, promote the deep integration of a new generation of information technologies such as big data, cloud computing, artificial intelligence, and 5G with phosphoric acid production, optimize the production process, conduct real - time monitoring of emissions, and reduce consumption and emissions. Fourthly, enterprises that generate phosphogypsum must build supporting harmless treatment facilities for phosphogypsum. Existing enterprises that generate phosphogypsum but have not built such facilities should make rectifications. For new projects that generate phosphogypsum, the supporting harmless treatment facilities should be designed, constructed, and put into use simultaneously with the main project. Fifthly, improve the environmental management level of phosphogypsum stacking sites, implement the "three preventions" measures for phosphogypsum slag storage yards and temporary stacking sites, ensure the effective collection of leachate, pay attention to groundwater monitoring data, and reduce the environmental risk hazards at stacking sites.   Excerpted from “Current Situation, Countermeasures and Suggestions for the Comprehensive Utilization of Phosphogypsum in Yunnan Province” by Huang Jie, from the Gypsum Branch of China Building Materials Federation.  

The 2024 China Green Industry Low-carbon Development Conference on the Comprehensive Utilization of Industrial Solid Waste Resources, co-organized by our company, was successfully held in Wuhan from December 8th to 9th. At the conference, our company conducted a themed technical exchange on the semi-dry continuous process technology and equipment for gypsum blocks, which received unanimous recognition from the attending experts and industry leaders. 

Gypsum block semi-dry continuous production line: achieves industrialization and continuous production, greatly improving the utilization rate of phosphogypsum. It has been highly recognized by users in multiple projects. It completely changes the production mode of traditional phosphogypsum block casting(high water-to-cement ratio, long drying cycle, low strength, large land occupation, high labor cost). The technical achievement has been highly recognized by many experts from the Guizhou Chemical Industry Society, who unanimously believe that the achievement is innovative in improving the production technology level of phosphogypsum hollow block, and the technical level has reached the domestic first-in-class and international advanced level. The process technology has been included in the "National Industrial Resource Comprehensive Utilization Advanced and Applicable Technology, Equipment Catalogue (2023 Edition)" jointly issued by the Ministry of Industry and Information Technology, the National Development and Reform Commission, the Ministry of Science and Technology, and the Ministry of Ecology and Environment. In 2021, the company was interviewed by CCTV's Time Heroes program (a video of the interview can be provided).

The company was established in September 1999. At the beginning of its establishment, it introduced silicon calcium composite ceiling technology to produce, sell, and install high-strength silicon calcium composite ceilings to make a living. From which "Hanfeng brand" products began to enter the market.   From 2004 to 2006, the company independently researched and developed moisture-proof phosphogypsum hollow blocks, with an annual production capacity of 1 million square meters of gypsum blocks; 2008-2009 won the Third Prize of Guizhou Provincial Science and Technology Progress and Guizhou Provincial Excellent New Product.   From 2008 to 2019, the company produced 1 million square meters of phosphogypsum silicon calcium composite ceiling 500,000 square meters of gypsum strip board, and 200,000 tons of lightweight plaster gypsum.   We began to independently develop the semi-dry continuous production technology and equipment of gypsum block since 2012. In December 2020, the first set of 100,000 m³/ year continuous production equipment of gypsum block semi-dry was successfully developed and put into use. Now we have built 2 production lines. While solving its own production needs, the process and equipment are optimized and upgraded in a timely manner according to the production practice, so as to fully adapt to and meet the requirements of the semi-dry process of industrial by-product gypsum production.   Due to the application of new technology and equipment, the production efficiency has been greatly improved, the company achieved rapidly development in the past three years since 2021. Now the company has the annual ability to manufacture and promote 20 lines semi-dry gypsum block continuous production equipment.

  Feng Xinchao, graduated from the Department of Machinery of Xiangtan Mining University in 1991. He is a senior engineer and economist, and has obtained the qualifications of a national lawyer and a national enterprise legal consultant. He undertook 6 national and provincial science and technology projects, 2 provincial high-tech industrialization projects, obtained 4 national invention patents, more than 30 utility model and design patents, 1 third prize for scientific and technological progress in Guizhou Province, 1 third prize for excellent new technology and new product in Guizhou Province, and 1 second prize for scientific and technological progress in Zunyi City.   Chen Zhengqiang, with a college degree, has been working in this industry for 15 years, who engaged in technology research and development and production management, and mainly focusing on the production and application of phosphogypsum building materials and the manufacturing of gypsum block production equipment. He has accumulated rich practical experience in the field of phosphogypsum building materials production technology, especially in continuously summarizing and refining the applicable technologies for semi dry production of gypsum blocks, optimizing and transforming equipment components, and how to make the unstable quality of building gypsum powder meet the semi dry continuous production process. The satisfaction rate of cooperative enterprises is 100%. Since 2020, we have obtained two invention patents for "Mechanized Continuous Preparation of Phosphogypsum Block Semi dry Production Method and Phosphogypsum Block" and "A New Type of Composite Gypsum Block and Its Application", involving multiple utility model and appearance design patents for phosphogypsum related process technology and phosphogypsum block production equipment.   Chen Qianlin, Doctor of materials science, Professor, Chief Scientist of China's 13th Five Year Key R&D Program, Provincial Management.    Expert of Guizhou Province, Top 100 Talent of Guizhou Province, and Outstanding Young Science and Technology Talent of Guizhou Province, he mainly engaged in research in the fields of resource efficient utilization and new energy materials, received 4 provincial and ministerial level second prizes in science, 3 third prizes in scientific and technological progress. He Published over 100 academic papers in domestic and foreign academic journals, and obtained more than 20 national invention patents. He has served as an expert for national talent selection, a consultant for the CPC Guizhou Provincial Committee's decision-making, the academic leader of Guizhou University, the academic leader of the Guizhou Chemical and Chemical Engineering Society, the committee member of the solid waste resourceization specialized committee of the China Nonferrous Metals Society, the vice president of the Guizhou Chemical and Chemical Engineering Society, the chief specialized technician of Guizhou Province, and the academic leader of the Guizhou University.

Zunyi Hanfeng Decoration Materials Co, Ltd. is a leading provider of solutions for the comprehensive utilization of industrial by-product gypsum in China. Specializing in the R&D of technologies for using gypsum from industrial by-products like phosphogypsum, the company manufactures new building decorative materials, produces semi-dry continuous equipment for gypsum block production, and offers the production of gypsum block semi-drying and continuous production equipment and technical services. The company covers an area of 40,000 square meters, with 26 years in the industry, Hanfeng is recognized as a National High-Tech Enterprise and a leader in new wall materials.In December 2020, it launched the world’s first semi-dry continuous production line for gypsum blocks, with an annual capacity of 100,000 cubic meters and put into use successfully.