Preparation method and application method of converter dedusting ash redox briquette

Abstract

The invention relates to a preparation method and an application method of converter dedusting ash redox briquettes, and belongs to the technical field of metallurgical solid waste resource recycling. According to the technical scheme, the converter dedusting ash redox briquette is used for replacing scrap steel for steelmaking production, and the converter dedusting ash redox briquette is prepared through the procedures of batching, forming and reducing; the converter dedusting ash and ingredients are subjected to briquetting forming, then the formed briquetting is subjected to oxidation reduction, the strength, the iron content and the metallization rate of the formed briquetting are improved, and the converter dedusting ash oxidation reduction briquetting prepared after full reduction reaction directly replaces part of waste steel and is used for converter steelmaking production. The strength, the iron content and the metallization ratio of the pellets are improved, the pellets directly replace scrap steel to be applied to converter steelmaking production, the production procedures are reduced, and the operation cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing redox briquettes of converter dust removal ash and an application method thereof, belonging to the technical field of metallurgical solid waste resource recycling. Background technique [0002] With the development of converter steelmaking production, the steelmaking process is becoming more and more perfect. At present, the dry electrostatic precipitator technology is mostly used in the converter area, abbreviated as CG method and LT method. It is a converter flue gas purification and gas recovery dry system. The dust removal method does not use a large amount of turbid ring water to wash the flue gas, but adopts a converter gas high temperature and high efficiency heat exchanger or an evaporative cooler + electrostatic precipitator + gas cooler system. , which has played a positive role in promoting energy saving and emission reduction in my country's converter steelmaking and the realization of negative...

AI Technical Summary

Problems solved by technology

Although the direct reduction technology of the rotary hearth furnace has a good reduction effect, the investment in the project is too large, the production and operation costs are too high, and the processing cost per ton is as high as 1,200 yuan

[0005] 2. The converter dust is returned to sintering and transferred to the blast furnace for steelmaking utilization; in the past, the sintering raw material was mixed into the sintering blast furnace and then used for steelmaking, and the converter dust removal was used as the sintering raw material and returned to the sintering blast furnace for steelmaking utilization. Long, low-grade, high energy consumption, increase the difficulty of sintering and blast furnace operation, and easily cause sintering failure and affect the life of blast furnace lining

The existing problems are: ①The strength is low, only 640N, the converter has a large drop, and the materials collide with each other, which is easy to break

② High temperature, adhesive failure, rapid evaporation of water, easy to pulverize

③ The iron oxide has not been reduced, the utilization rate is less than 10%, and the remaining 90% becomes converter dust, which increases the dust emission of the converter

The utilization rate is extremely low, affecting product quality, wasting resources, affecting the life of smelting equipment, and increasing production and operation costs

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