Preparation method for pelletizing and producing yellow phosphorus by phosphorus ore concentrate

Abstract

The invention provides a preparation method for pelletizing and producing yellow phosphorus by a phosphorus ore concentrate which comprises the following components in terms of producing 1000 Kg of yellow phosphorus: 7100-8500 Kg of phosphorus ore concentrate powder, 1800-2000 Kg of coke dust, 1800-3300 Kg of silica powder, 130 Kg of humic acid and 65 Kg of sodium hydroxide. The preparation method is as follows: grinding formula components by a ball mill; adding a binder composed of the humic acid and the sodium hydroxide, and evenly stirring; processing into a compound pellet by a ball pressing and forming machine; dying by a chain plate dryer; and sending into a yellow phosphorus electric furnace to prepare into a yellow phosphorus finished product. The invention fully utilizes powder phosphate ores and low-grade phosphate ores; the phosphorus ore concentrate powder obtained by mineral separation is produced into a pellet by the binder, and then the pellet is prepared into yellow phosphorus by the electric furnace. Compared with the existing phosphorus preparation by a phosphorus ore concentrate, the invention lowers cost by one time, reduces CO emission by about 35%, reduces electricity consumption by about 40%, improves capacity by 2 times and reduces materials by about 40%. Thus, the invention is an excellent method for solving the problems of high energy consumption, high emission and high pollution for yellow phosphorus production in China.

Description

technical field [0001] The invention relates to a method for processing yellow phosphorus, in particular to a method for preparing yellow phosphorus by pelletizing phosphorus concentrate powder. Background technique [0002] Yellow phosphorus is a compound for the manufacture of red phosphorus, phosphoric acid, phosphorus pentoxide, phosphorus trichloride, phosphorus pentasulfide, phosphorus trichloride and phosphorus. It can be used in organic synthesis industries such as desiccants, pesticides, spices, dyes, and phosphate esters. It is used in many fields such as machinery, textile and national defense industries, but the current yellow phosphorus processing uses phosphate rock as the main raw material. After being mixed with coke and silica and crushed, yellow phosphorus is produced in an electric furnace. Uneven size and excessively high harmful carbonate content lead to uneven decomposition of absorbed heat energy, resulting in excessive power consumption and raw material...

AI Technical Summary

Problems solved by technology

[0002] Yellow phosphorus is a compound for the manufacture of red phosphorus, phosphoric acid, phosphorus pentoxide, phosphorus trichloride, phosphorus pentasulfide, phosphorus trichloride and phosphorus. It can be used in organic synthesis industries such as desiccants, pesticides, spices, dyes, and phosphate esters. It is used in many fields such as machinery, textile and national defense industries, but the current yellow phosphorus processing uses phosphate rock as the main raw material. After being mixed with coke and silica and crushed, yellow phosphorus is produced in an electric furnace. Uneven size and excessively high harmful carbonate content lead to uneven decomposition of absorbed heat energy, resulting in excessive power consumption and raw material loss, long chemical reaction time in the heating process, low production capacity, and excessive cost, especially in crushing and heating During the process, dust and carbon monoxide emissions are serious. The current yellow phosphorus processing and production enterprises have become enterprises with high energy consumption, high emissions and high pollution in my country, and are one of the current key rectification enterprises.