Steelmaking iron-making and sintering dedusted ash solid waste treatment and comprehensive utilization system and method

Abstract

The invention particularly relates to a steelmaking iron-making and sintering dedusted ash solid waste treatment and comprehensive utilization system and method. The steelmaking iron-making and sintering dedusted ash solid waste treatment and comprehensive utilization system comprises a boiler, wherein the boiler is connected with a bag-type dust remover. The steelmaking iron-making and sintering dedusted ash solid waste treatment and comprehensive utilization system is simple in structure and low in investment cost. According to the steelmaking iron-making and sintering dedusted ash solid waste treatment and comprehensive utilization system, original dedusted ash and pulverized coal are mixed and added to the boiler to be combusted, iron is isolated in a boiler ash mode, and zinc oxide sublimates in the boiler to be gaseous, enters the bag-type dust remover along with primary dedusted ash, and is isolated through the bag-type dust remover after cooling is accomplished. The solid waste treatment and comprehensive utilization technology is simple, operation is convenient, the zinc removal effect is good, and the zinc removal rate reaches up to 99%. High-pressure steam generated by the dedusted ash and the pulverized coal or coke powder does not need to be processed through pressure reduction, directly enters a steam turbine to conduct electricity generation, and is ingeniously utilized.

Description

[0001] (1) Technical field [0002] The invention relates to a solid waste treatment and comprehensive utilization system and method for steelmaking, ironmaking and sintering dust removal ash in the iron and steel industry, in particular to a solid waste treatment and comprehensive utilization system and method for steelmaking, ironmaking and sintering dust removal ash. [0003] (2) Background technology [0004] A large amount of dust is produced in blast furnaces for ironmaking and steelmaking. The dust contains iron, carbon, zinc, etc., and the content of iron can be as high as 50%. There are many precedents for blast furnaces to be affected by the enrichment of harmful elements, to affect the operation and life of the blast furnace, and even to cause accidents. Therefore, dust removal is mostly difficult. Reuse can only be stacked, which not only causes a serious waste of resources, but also takes up a lot of space, resulting in a waste of space. The most important thing is...

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Problems solved by technology

[0004] A large amount of dust is produced in blast furnaces for ironmaking and steelmaking. The dust contains iron, carbon, zinc, etc., and the content of iron can be as high as 50%. There are many precedents for blast furnaces to be affected by the enrichment of harmful elements, to affect the operation and life of the blast furnace, and even to cause accidents. Therefore, dust removal is mostly difficult. Reuse can only be stacked, which not only causes a serious waste of resources, but also takes up a lot of space, resulting in a waste of space. The most important thing is that it can easily become a huge source of pollution to the environment. This situation needs to be improved urgently.

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