The utilization status of phosphogypsum
Date:2021-09-23 15:38:31
Author:admin
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Phosphogypsum is an industrial by-product discharged during the production of wet-process phosphoric acid. Usually, 1 ton of phosphoric acid can produce 4.5-5.0 tons of phosphogypsum by-product.
China is a large agricultural country. The huge demand for phosphate fertilizer has driven the rapid development of China's phosphate chemical industry. China has become the world's largest producer of phosphate fertilizers. Therefore, the scale of phosphogypsum emissions is also very large. The stock of phosphogypsum has reached 600 million tons. It is still increasing at a rate of about 80 million tons per year.
Although there are many ways to use phosphogypsum, the resource utilization is only about 30%. At present, the disposal methods of stockpiling and pit backfilling are mainly adopted. Storage yards need to be set up, which will not only occupy a large amount of arable land, but also require large investment and high cost, and high requirements on the geological conditions of the storage yard. The amount of backfilling in the mine is limited, and the phosphogypsum will also pollute the surface water and groundwater caused by harmful substances such as P205, F-, free acid, organic matter, etc., which will have long-term harmful effects on the environment.
Reasonable development and utilization of phosphogypsum can save natural gypsum resources and improve the environment. Economic and social benefits coexist. In areas where the phosphorous chemical industry is concentrated in Guizhou, the comprehensive utilization of phosphogypsum has been gradually developed, mainly including building materials and making fertilizers.
Henan Zhengzhou Mining Machinery Co., Ltd. is an equipment manufacturer specializing in the production of phosphogypsum processing production lines. Since the establishment of the factory, the company has always adhered to the principle of morality in advance and benefiting others. Always insist on being a leader in the industry segment market. In the emerging market of phosphogypsum, ZK Corp, as a forerunner, survives by quality and develops with science and technology, will definitely help the development of the phosphogypsum resource industry.
