Method and equipment for producing yellow phosphorus by utilizing closed annular heating furnace

Abstract

The invention discloses a method and equipment for producing yellow phosphorus by utilizing a closed annular heating furnace. The equipment comprises a raw material crusher, a vibrating screen extension set, a drying machine, a metering device, a mixed storage bin and the closed annular heating furnace which are sequentially connected, wherein the closed annular heating furnace is respectively connected with a furnace gas treatment tail gas recovery mechanism and a slag collecting tank; and the furnace gas treatment tail gas recovery mechanism is connected with the closed annular heating furnace through a tail gas recovery pipeline. The method comprises the following steps of: raw material pretreatment, material proportioning, carrying out a reaction in furnace, discharging and performing a tail gas comprehensive utilization process. The equipment is low in power consumption, low in operating cost, low in investment strength and easy to maintain and has good industrial application prospect; and moreover, mature process conditions of yellow phosphorus production are by utilizing the equipment are realized, the yellow phosphorus tail gas heat value can be fully utilized, consumable graphite electrodes and carbon electrodes are not consumed, and the production energy consumption and cost are greatly reduced.

Description

technical field [0001] The invention relates to a method and equipment for producing yellow phosphorus, in particular to a method and equipment for producing yellow phosphorus using a closed annular heating furnace. Background technique [0002] Yellow phosphorus is a very important and irreplaceable chemical raw material. It can be used as a raw material to produce phosphoric acid, pesticides, detergents, phosphate fertilizers and other products. It is widely used in fertilizers, food, medicine, electronics, textiles, metallurgy, Ceramics and other industrial fields also play an important role in the defense industry. At present, in the production of yellow phosphorus at home and abroad, the electric furnace method is the absolute dominant process, that is, the mixture of phosphate rock, silica and carbonaceous reducing agent is added to the closed electric furnace, and the three-phase current input in the electric furnace generates high temperature in the form of resistanc...

AI Technical Summary

Problems solved by technology

However, due to the difficulty and high purification cost of the phosphorus furnace tail gas purification technology suitable for carbon-chemical industry, the applicability is not strong

At present, the comprehensive utilization of tail gas in most phosphorus chemical enterprises is still in the low-level application stage. For example, the tail gas of phosphorus furnace is only used as the fuel for raw material drying and sludge phosphorus burning, and the rest of the tail gas can only be burned in vain, which has caused certain environmental pollution. , and a great waste of energy

[0007] Based on the current production and research status of yellow phosphorus, there is no production process that can effectively solve the comprehensive energy consumption of yellow phosphorus, especially the high power consumption of electric furnaces and low tail gas utilization. The process of using the calorific value of the phosphorus furnace tail gas to reduce the phosphate rock to yellow phosphorus will inevitably provide the possibility for the sustainable development of the yellow phosphorus industry at home and abroad and the recycling of resources, and will also produce good economic and environmental benefits

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