SU874612A1 - Method of producing yellow phosphorus - Google Patents

Description

The invention relates to the technology for producing yellow forfor used to produce thermal phosphoric acid and phosphorus compounds. A method of producing yellow phosphorus by electrothermal sublimation of a mixture consisting of quartzite and coke phosphate is known. The components of the mixture are fed to the mixture in the form of pieces of size, respectively, 5-25, 5-50, 5-50 mm, vyadel emk when sifting raw materials into fractionsC. The disadvantage of this method is high power consumption. There is also known a method for producing yellow phosphorus by agglomerating phosphate raw materials, displacing phosphate raw materials agglomerate, displacing agglomerate with coke, loading the charge into an electric furnace followed by electrothermal sublimation of phosphorus 2}. However, the method has a low output of an electric furnace, which is 5.1 kg / h with a speech power of 100 kVA. The purpose of the invention is to improve the performance of the electric furnace. The stove is achieved by the fact that in the method of obtaining yellow phosphorus, the agglomerate is blown up with a stream of air supplied at a speed of 8-10 m / s at an angle of 100120 ° to the direction of the falling from a height of 0.5-6.8 m with agglomerate at an air flow rate before mixing. 30-70 1 t-material. If the speed of the jet, the amount of air and the height of the fall of the phosphate material are more than the specified values, the pieces are partially destroyed and additional dust is generated, which reduces the performance of the electric furnace. At values of jet velocity and air amount less than, respectively, V m / s and 30 m per 1 ton. Incomplete removal of dust from the pores of pieces of phosphate material also results in a decrease in electric furnace performance. PRI me R 1. Phosphate raw materials with a particle size of 5-50 mm are blown before being loaded into the furnace. The blowing is carried out when a stream of phosphate raw material is dropped from a height of 0.5 m with an air jet directed at an angle of 100 to the stream of phosphate raw material at

jet speed of 8 m / s and the amount of air 30 m per 1 ton of material. Then prepare the mixture and load it into the furnace. The mixture is heated and sublimates phosphorus.

The dust content of the phosphorus-containing gas leaving the furnace is 46 g / nm. The furnace's productivity in phosphorus is 5.30 kg / h.

PRI mme R 2. Phosphate raw materials of size 5-50 mm before loading into the furnace is subjected to a blower. The blowing is carried out when a stream of phosphate raw material is dropped from a height of 0.7 m with an air stream directed at an angle of 115 ° to the stream of phosphate raw material, at a jet velocity of 9 m / s and an amount of air of 50 mg / g of material.

The content of PIAP in the phosphorus-containing gas exiting the furnace is 42 g / nm. The phosphorus furnace productivity is 5.35 kg / h.

Froze Phosphate raw materials with a particle size of 5-50 mm before loading the furnace is subjected to a blower. The blowing is carried out at PSC of the flow of phosphate raw materials from a height of m with a stream of air directed at an angle of 120 to the flow of phosphate raw materials, at a jet velocity of 10 m / s and an air amount of 70 m / t of material.

The dust content of the phosphorus-containing gas leaving the furnace is 42 g / nm.

Furnace productivity on phosphorus is equal 5,35 kg / h.

Thus, the proposed method makes it possible to increase the electric furnace production capacity by 5%, which makes it possible to obtain an economic effect of 1.66 million rubles. per year with a furnace power of 100 kVA.

Claims (2)

1.Pozin M.E. Mineral salt technology. 1974, vol. 2, p. 946. 2. Karatau phosphorite processing Ed. Pozina M.E. 1975, p.60-63.