Equipment and method for producing yellow phosphorus from middle-low-grade phosphate ore

Abstract

The invention discloses equipment and a method for producing yellow phosphorus from middle-low-grade phosphate ore. The yellow phosphorus production equipment can be used for preparing the yellow phosphorus from the middle-low-grade phosphate ore, further improves an energy utilization efficiency and effectively controls pollutant generation at the same time. The yellow phosphorus production equipment comprise a grinding unit, a ball making and drying unit, a reduction reaction unit, a furnace slag cooling unit and a separating and purifying unit, wherein the grinding unit comprises a grindingdevice and an air conveying device; the ball making and drying unit comprises a mixer, a ball making machine and a drying machine; the reduction reaction unit comprises a high temperature flue gas generation furnace and a reaction phosphorus furnace; the separating and purifying unit is communicated with the reaction phosphorus furnace, the high temperature flue gas generation furnace and the furnace slag cooling unit; the furnace slag cooling unit is communicated with the ball making and drying unit. The invention further discloses the method for producing the yellow phosphorus from the middle-low-grade phosphorus ore. According to the equipment, heat contained in CO and high temperature furnace slag is comprehensively utilized, and a part of fuel is supplemented at the same time, so that the energy utilization efficiency is improved.

Description

technical field [0001] The invention relates to a yellow phosphorus production equipment, in particular, the invention relates to an equipment for producing yellow phosphorus by using medium and low-grade phosphate rock. In addition, the invention also relates to a method for producing yellow phosphorus by using low- and medium-grade phosphate rock. Background technique [0002] Yellow phosphorus is an important basic industrial raw material, mainly used in the preparation of phosphoric acid, phosphide, phosphate, etc., widely used in fertilizer, feed industry, food processing industry, construction industry, medicine, electronics industry and many other fields. [0003] At present, the main method of industrial production of yellow phosphorus is the electric furnace method, that is, phosphate rock, silica, and coke are placed in an electric furnace according to a certain proportion and particle size, and a reduction reaction occurs at a high temperature of 1400 ° C, and the...

AI Technical Summary

Problems solved by technology

The phosphate rock raw materials used by my country's yellow phosphorus production enterprises are still mainly rich ore (P 2 o 5 mass fraction ≥ 28%), domestic mining companies mostly mine the rich and abandon the poor, and mine blocks and discard powder. Generally, every ton of high-grade phosphate rock with a mass fraction of 30% (mass fraction) is selected, as many as four tons or more will be produced low-grade tailings, serious waste of resources

At the same time, after many years of disorderly and over-exploitation of my country's phosphate rock resources, there are not many rich ore left, and the low- and medium-quality phosphate rock resources cannot be scientifically utilized.

At the same time, the production cost of yellow phosphorus is greatly affected by the electricity price. In order to reduce the cost, most enterprises use the electricity price trough period for production, which cannot realize long-term continuous production operations, resulting in the inability to fully utilize carbon monoxide (CO) and other products, resulting in a huge waste of energy. and a series of environmental pollution problems

Some yellow phosphorus production enterprises try to combine yellow phosphorus production with chemical production, but because the catalyst in chemical production has high requirements on the purity of raw materials, and the composition of the furnace gas produced by yellow phosphorus is complex, it is difficult to purify and separate, and the production scale of yellow phosphorus is small The matching with chemical production is poor, and the road to real phosphating co-production is still very long

[0005] Therefore, providing a technology that utilizes medium and low-grade phosphate rocks to produce yellow phosphorus while making full use of the heat and energy in the production process will be a solution to the high energy consumption, low energy utilization rate, and large environmental impact in the current yellow phosphorus production process. main way of

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