Production method for yellow phosphorus

Abstract

The invention discloses a production method capable of replacing the conventional coarse phosphorus refining technology and producing yellow phosphorus with higher purity. The production method comprises the following steps: (1) feeding coarse phosphorus into a reaction vessel provided with a stirring device, adding the coarse phosphorus to hot water which is pre-fed into the reaction vessel and is kept at the temperature of 60-90 DEG C, then stirring until the yellow phosphorus is molten completely, adding activated carbon powder, of which the particle diameter is 80-500 [mu]m and the added weight is 0.2-2% of the adding weight of the coarse phosphorus, into the mixed slurry of the yellow phosphorus and the water, and fully mixing the activated carbon powder and the slurry through stirring; (2) feeding the slurry mixed with the activated carbon powder into a solid-liquid filtering separation system for filtering by a filtering element at the temperature condition of 60-90 DEG C, and controlling the solid content of the filtered out yellow phosphorus to be below 5mg / L; (3) feeding the filtered out yellow phosphorus to a poaching system to conduct at least three stages of poaching; 4) feeding the poached acceptable yellow phosphorus product to a product tank, and obtaining the yellow phosphorus product through further treatment.

Description

technical field [0001] The invention relates to a production method of yellow phosphorus. Background technique [0002] The current yellow phosphorus production process is to put phosphate rock, coke and silica raw materials into the phosphorus electric furnace for reaction in proportion, and then spray and cool the furnace gas through the sprayer to obtain crude phosphorus in the phosphorus receiving tank at the lower part of the sprayer. Then the crude phosphorus is introduced into the refining tank for several stages of refining, and finally the yellow phosphorus product is obtained. A large amount of mud phosphorus will be produced in the above crude phosphorus refining process, and the phosphorus content in the mud phosphorus is relatively high. At present, the phosphorus in the mud phosphorus is recovered through a multi-stage recovery process, which consumes a lot of equipment, manpower, water and energy consumption. Simultaneously, the existing rough phosphorus refi...

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Problems solved by technology

A large amount of mud phosphorus will be produced in the above crude phosphorus refining process, and the phosphorus content in the mud phosphorus is relatively high. At present, the phosphorus in the mud phosphorus is recovered through a multi-stage recovery process, which consumes a lot of equipment, manpower, water and energy consumption. ; Simultaneously, the existing crude phosphorus refining process is also difficult to produce high-purity yellow phosphorus (yellow phosphorus content ≥ 99.99%), which cannot meet the requirements of fine phosphorus chemical products such as electronic functional materials

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