Phosphate and compound fertilizer industry discusses the direction of green transformation

"In the future, the phosphate compound fertilizer industry will focus on energy conservation and consumption reduction in the sources of phosphate rock and phosphoric acid production, product generation, comprehensive utilization of phosphogypsum and tailings, product innovation, weight loss and efficiency enhancement, and carbon emission reduction
.
" In June At the 29th National Annual Meeting of the Phosphate and Compound Fertilizer Industry held online from the 9th to the 10th, experts pointed out the future green development direction of the phosphate and compound fertilizer industry
.

In 2021, the phosphorus and compound fertilizer industry will strive to overcome the negative impact of the epidemic and the instability of the supply chain, and make positive contributions to ensuring the national fertilizer supply and food security.
However, the phosphorus and compound fertilizer industry is currently facing a green transition under the "two-carbon" policy.
important task
.
Xiu Xuefeng, chairman of the China Phosphate and Compound Fertilizer Industry Association, said that in 2022, the entire industry will not only give top priority to safe production, stable prices and supply to ensure the country's food security, but also to effectively promote green development and make great efforts to research and solve phosphorus and fertilizer problems.
Efficient utilization of resources, utilization of phosphorus tailings and phosphogypsum and other common problems in the industry will enhance the overall competitiveness of the industry
.

Li Yongliang, deputy director of the Industrial Development Department of the China Petroleum and Chemical Industry Federation, pointed out that the carbon emissions of monoammonium phosphate and diammonium phosphate are more than 30 million tons, which is relatively small compared with other industries
.
Under the opportunities and challenges brought by the "dual carbon" policy, the future development path of the phosphorus compound fertilizer industry can be to save energy resources, vigorously improve energy efficiency, promote a clean and low-carbon energy structure, improve the supply level of high-end petrochemical and chemical products, and accelerate the development of carbon dioxide capture.
Development in the direction of integrated utilization and storage projects
.

According to Zheng Xiuxing, deputy chief engineer of China Phosphate and Compound Fertilizer Industry Association, from the perspective of production source, in the main links of carbon emissions in the phosphate fertilizer industry, the quality of phosphate rock and phosphoric acid are the most important factors affecting its carbon emissions
.
Most of the small and medium-sized mines and phosphate fertilizer enterprises in China have a phosphorus resource recovery rate of about 80% or lower in low-grade phosphate ore beneficiation
.
The phosphoric acid produced by high-concentration phosphate fertilizers is mainly produced by the dihydrate process, and there are situations such as low concentration of extracted concentrated acid and low conversion rate of phosphorus pentoxide
.

In this regard, Zheng Xiuxing suggested that enterprises should achieve source reduction through research and development of the grades of low- and medium-grade phosphate rock processing products, promotion of efficient beneficiation technology and process equipment, promotion of green phosphoric acid processes such as semi-dihydrate method, and research and development of mixed acid method and other technologies.
carbon
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In addition, he also suggested that enterprises should choose compound fertilizer technology according to local conditions, make efficient use of upstream industrial energy, comprehensively reduce energy consumption in production and transportation, and innovate and develop fast-acting, slow-acting, and intelligent products to save energy and reduce carbon
.

In addition to reducing carbon at the source, for the phosphorus compound fertilizer industry, the most effective way to achieve carbon emission goals is to improve fertilizer efficiency and reduce fertilizer production
.
Following this idea, Professor Wang Xinlong from the School of Chemical Engineering of Sichuan University proposed the efficient use of low- and medium-grade phosphate rock, in-situ ammonium phosphate and other innovative green and efficient phosphate fertilizer development ideas, and pointed out that chelation, polymerization, carbon-phosphorus synergy, nutrient regulation and other means can be used.
, to achieve efficient utilization of phosphorus resources
.

Phosphogypsum is a "stubborn disease" that restricts the low-carbon development of the phosphorus compound fertilizer industry
.
Zhang Huali, deputy dean of the School of Chemistry and Environmental Engineering of Wuhan University of Technology, believes that it is imperative to store phosphogypsum in a harmless manner to eliminate potential harm to the environment, and it is also the only way out for the current phosphorus chemical industry
.
If phosphogypsum is to be truly utilized as a resource, it must be promoted under the leadership of the government, and phosphogypsum should be applied to urban public areas such as flower beds and curbs
.
In this way, on the one hand, the city's infrastructure costs are saved, and on the other hand, it also plays a leading and exemplary role in public consumption, and can gradually eliminate the prejudice that phosphogypsum has been demonized for a long time due to public opinion, so as to establish a more objective understanding of phosphogypsum.
The subsequent wider application of phosphogypsum lays the foundation
.