On August 24th, Hubei Yihua Group's annual output of 1 million tons of diammonium phosphate production equipment was successfully put into production in Yichang. This device breaks the tradition that Yichang Collophanes cannot produce DAP and is of great significance to the comprehensive utilization of phosphate resources in Hubei Province and the sustainable development of the phosphorus chemical industry.
According to the Ministry of Land and Resources, Yichang's phosphate rock resources account for 54% of Hubei Province and 10% of the country's total. The city’s accumulated proven geological reserve of phosphorus rock is about 1.26 billion tons, and it actually holds reserves of 827 million tons. Since the industrial type of Yichang phosphate ore is sillimanite phosphate rock, commonly known as “gelite rockâ€, it is extremely fine with dolomite carbonates and siliceous materials, as well as hydromica, kaolinite and other argillaceous minerals. The particles are cemented together and have a high content of impurities. Therefore, its selection and enrichment is very difficult and it cannot meet the requirements for industrial production of high-concentration phosphate compound fertilizers and raw materials for the production of diammonium phosphate. For a long time, Yichang phosphorite can only be used to produce phosphorous primary products such as yellow phosphorus, phosphoric acid and phosphate fertilizers.
In recent years, Yihua Group has invested more than RMB 60 million and has jointly designed a 600,000 tons/year medium and low-grade heavy medium mineral processing unit and 1.5 million tons/year with internationally renowned research institutes such as Israel BAKEMAN and Lianyungang Chemical Research & Design Institute. Year's double reverse flotation mineral processing plant. After more than one year of debugging, both sets of equipment have reached the requirements of industrial production, and the operation is in good condition. Medium- and low-grade heavy-medium mineral processing equipment uses proprietary technology to increase the P2O5 content of the selected phosphate grades by 20% to over 29%, and to increase the resource utilization rate to more than 80%. After the beneficiation by the double reverse flotation device, harmful impurities were removed to increase the phosphorus ore grade P2O5 to more than 32%, which fully met the technical indicators for the production of raw materials for the production of diammonium phosphate.
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