Yellow phosphorus preparation process based on oxygen thermal method

Abstract

The invention aims to overcome the defects of high production cost, low byproduct gas yield and the like in the prior art, and provides a yellow phosphorus preparation process based on an oxygen thermal method. A feeding nozzle 3 is arranged at the top of an entrained-flow bed reactor, a phosphate ore feeder 1 is arranged at the middle-lower part of the furnace, a synthesis gas outlet 7 is formed in the middle-lower part of the furnace, a slag discharge port 6 is formed in the bottom of the furnace, and the interior of a hearth is divided into a gasification reaction zone 10 and a molten pool reaction zone 11 from top to bottom. The synthesis gas outlet 7 is connected with a cylinder body 8 with a water cooling wall; and the cylinder body is simultaneously provided with a water supply inlet 9 and a steam outlet 10. And a synthesis gas outlet 11 of the water-cooled wall cylinder is connected with a phosphate ore / silica preheater 12. Excessive coal and oxygen are subjected to partial gasification reaction to generate a large amount of heat and coke, the heat and the coke are used for reduction of phosphate ore, the generated yellow phosphorus sublimates into the synthesis gas, then the yellow phosphorus in the synthesis gas is separated and purified, and the byproduct high-quality synthesis gas can be used as a chemical raw material.

Description

technical field [0001] The invention relates to the field of yellow phosphorus preparation, in particular to a yellow phosphorus preparation process based on an oxythermal method. [0002] technical background [0003] Yellow phosphorus is an extremely important basic industrial raw material, which is widely used in chemical industry, pesticide and other fields. At present, the total output of yellow phosphorus in my country ranks first in the world. The yellow phosphorus production areas are mainly located in Yunnan, Guizhou, Sichuan and Hunan provinces. At present, the production processes of yellow phosphorus are mainly blast furnace method and electric furnace method. The blast furnace method uses a fixed-bed reactor, which uses air as an oxidant to react with coke. The equipment is huge and the system is complicated. The CO content in the gas is only 30%, and the utilization value is low, so the market share is low. The electric furnace method is to add the mixture of p...

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Problems solved by technology

However, the production cost of yellow phosphorus obtained by the electric furnace method is high, and the by-product gas output is low, so it is difficult to use it as a chemical raw material in a large-scale and economically

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