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Comprehensive Utilization of Phosphogypsum and Its Initial Utilization

In a recent interview, it was revealed that the national standard for "building gypsum" is undergoing revision to officially classify phosphogypsum as a "product" for the first time. This change marks a significant shift in perception, as phosphogypsum has long been regarded as "waste residue." Industry experts emphasized that companies must take this new definition seriously and prepare accordingly, as the updated standard will pave the way for more effective and widespread utilization of phosphogypsum. Environmental pressures have intensified in recent years, prompting a growing focus on sustainability across various sectors. In the phosphate fertilizer industry, these pressures have made waste management—especially the handling of phosphogypsum—a pressing issue. In 2006, the former State Environmental Protection Administration classified phosphogypsum as hazardous waste, which raised concerns about existing storage facilities. With over 100 million tons of phosphogypsum currently stored, companies may need to invest heavily in new disposal systems, further highlighting the urgency of finding sustainable solutions. The revised standard for building gypsum not only redefines phosphogypsum but also sets the stage for its broader application. Now considered a key raw material rather than a by-product, phosphogypsum should be managed with the same rigor as other products. Companies are encouraged to develop specific standards for its transport, storage, and usage to ensure compliance and efficiency. New technologies are emerging to address the challenges of phosphogypsum utilization. Researchers at Xi’an University of Architecture and Technology, in collaboration with Guizhou Yifu Group, are exploring advanced methods like high-solid-to-gas ratio suspension technology to decompose phosphogypsum efficiently. This innovation could help convert phosphogypsum into valuable resources such as sulfuric acid, reducing waste and promoting circular economy practices. Despite progress, large-scale comprehensive utilization remains a challenge. Most phosphogypsum is still used as a substitute for natural gypsum in construction materials, but issues like waterproofing and limited market reach persist. Experts stress the need for more innovative and scalable solutions to fully leverage this resource. Several companies have already made strides in phosphogypsum utilization. Shandong Lubei Group, for example, has developed a co-production system that integrates phosphogypsum into cement and sulfuric acid production. Other enterprises, including Guizhou Fufu and Guizhou Kaifeng, are using phosphogypsum to produce cement retarders and mine fillers. These efforts have earned recognition from the National Development and Reform Commission as part of China’s circular economy initiatives. As the industry moves forward, the integration of phosphogypsum into mainstream applications will play a crucial role in achieving environmental and economic sustainability. The ongoing revisions to national standards, combined with technological advancements, signal a promising future for the responsible and efficient use of this valuable by-product.

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