"Based on the major breakthroughs made in the localization and large-scale production of single-series equipment for China's phosphoric acid and phosphate compound fertilizer industry in the 11th Five-Year Plan period, the phosphorus and compound fertilizer industry will strive to reduce pollutant emissions during the "12th Five-Year Plan" period. , Significantly increase the comprehensive utilization rate of phosphorus resources and phosphorus chemical technology level.†At the 19th National Conference on Phosphorus and Compound Fertilizer Industry held in Changsha at the end of April, the College of Chemical Engineering and Energy, Zhengzhou University, and the National Phosphate Fertilizer and Compound Fertilizer Information Station Tang Jianwei The professor clarified the highlight of the phosphorus and compound fertilizer industry in the next five years.
Tang Jianwei pointed out that the top priority in improving the comprehensive utilization of phosphorus resources is to increase the utilization of low-grade phosphate rock. Therefore, China will increase the development and input of collophane ore beneficiation technology, accelerate the industrialization of middle-low-grade phosphate ore beneficiation technology, increase the degree of protection of phosphorus resources, ensure the sustainable development of the phosphate fertilizer industry, and accelerate the kiln-process phosphoric acid technology. The industrialization and scale of the process. He believes that kiln-based phosphoric acid can not only directly use low-grade phosphate rock, but also alleviate the shortage of sulfur resources in China, and strive to build 2 million tons of phosphoric acid production capacity in 3 to 5 years.
“Developing fine phosphorus chemical industry and realizing the deep processing of phosphorus resources are also important tasks for the 'Twelfth Five-year Plan'.†Tang Jianwei said that the phosphate and compound fertilizer industry should speed up the localization process of wet-process phosphoric acid purification technology, and develop and produce high-grade (or high Pure) industrial grade, food grade, electronic grade phosphoric acid and phosphate and other finely-phosphorous chemical products; strengthen the recovery of fluorine, iodine, silicon and other associated resources in phosphate rock, produce anhydrous hydrogen fluoride, iodine, silicon and its high value-added series products. ,Improve economic efficiency.
Increasing the comprehensive utilization of by-product phosphogypsum is an important measure to reduce pollutant emissions during production. Tang Jianwei said that phosphogypsum can be used to make all kinds of new building materials, such as gypsum powder, gypsum board, blocks, and standard bricks. Phosphogypsum should be promoted to replace the cement retarder technology of natural gypsum, and further increase the sulfuric acid and decomposition of phosphogypsum. Technology. In addition, we must continue to develop new phosphate fertilizer products, use low-grade phosphate rock to produce new phosphate fertilizer products, use low-grade phosphate rock and insoluble potassium minerals to produce molten phosphorus and potassium fertilizers, develop various slow- and controlled-fertilizers, special fertilizers, and adjust phosphate fertilizer products. structure.
It was learned from the conference that new achievements have been made in the development of China's phosphoric acid and phosphorus compound fertilizer technology during the "11th Five-Year Plan" period. In terms of phosphoric acid, the purification technology for wet-process phosphoric acid has made a major breakthrough, and the capacity for manufacturing phosphoric acid equipment has been further improved; new breakthroughs have been made in the utilization of residual heat of phosphoric acid thermal reaction, and the introduction and digestion and absorption of electronic-grade phosphoric acid technology have made progress. In terms of phosphorus and compound fertilizers, enterprises such as Qifu have actively developed overseas projects, which indicates that the technological equipment of China's phosphate fertilizer industry has reached the world's advanced level, and it has shifted from technology import to technology export.
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