The hottest new technology of solid-liquid extract

Recently, an industrial test device with an annual output of 30000 tons has been built by using the new process technology of solid-liquid extraction for phosphoric acid organized by Nanchang Jiate Technology Co., Ltd. and has been running continuously for more than 48 hours. Jia3 is to improve and transform the control means of using low-grade phosphate rock raw ore powder with a phosphorus pentoxide content of 21%, Calcium superphosphate with effective phosphorus content of 16% and phosphoric acid with concentration of more than 28% were successfully developed, which can meet the production needs of monoammonium phosphate, diammonium phosphate and ternary compound fertilizer. The new process technology of preparing phosphoric acid by solid-liquid extraction has explored a new way for the production of phosphoric acid and compound fertilizer from low-grade phosphate rock in China

it is reported that this technology is applicable to the production of dry and wet superphosphate fertilizers. This process uses the independently developed solvent to react with sulfuric acid, and uses leaching, extraction, impurity removal, purification and other processes to produce dilute phosphoric acid products with a concentration of more than 28%. The process has mild reaction conditions and low energy consumption. Its sulfuric acid consumption is 10% lower than that of high-grade phosphate rock production process, and there is no waste water and waste gas emission. The waste residue can be used to manufacture cement and other building materials. Low grade phosphate rock with phosphorus pentoxide content of 15% - 22.8% can produce dilute phosphoric acid with concentration of 24% - 28% by adopting this new environmental protection phosphating process. The product quality has reached the national standard after being tested by the chemical fertilizer quality inspection department of Jiangxi Province. The company has started the software package design of industrial production devices with an annual output of 50000-100000 tons on January 30. The first device is expected to start construction in the first half of this year, which is for many people

at the same time, using this process technology to produce dilute phosphoric acid has low cost and obvious economic benefits. Taking the low-grade phosphate rock in Xiangyang, Hubei Province as an example, the average consumption of main raw materials per ton of superphosphate (effective phosphorus content 16%~17%) is 0.9 tons of phosphate rock (phosphorus pentoxide content 21.7%~22.8%), and the consumption of sulfuric acid (93 acid) is about 0.4 tons. The cost of the two main raw materials is about 100 yuan lower than that of the traditional method. According to this estimation, a calcium superphosphate enterprise with an annual capacity of 100000 tons can add nearly 10 million yuan of benefits every year. In addition, the equipment investment transformation is also relatively simple. Luowuzhao senior engineer, the R & D person of the project, introduced to him that to carry out the technical transformation of dilute phosphoric acid with an annual output of 50000-100000 tons for manufacturers with existing calcium superphosphate production equipment, it only needs to invest about 500000 yuan, which is at the upper middle level of the country, and add some equipment

low-grade phosphate rock has large reserves and wide distribution in China, but it has not been fully utilized so far, and most of it has become waste. At present, qualified products with an effective phosphorus content of more than 16% should be produced, and the content of phosphorus pentoxide should be at least more than 30%

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