Converter dust removal ash iron recovery system and method based on KR desulfurization station

Abstract

The invention discloses a convertor dry process dust removal ash iron recovery system based on a KR desulfurization station. The system mainly comprises a dust removal ash material supply device, a molten iron tank, a stirring device, a molten iron tank overturning trolley and a crawler loader, wherein the dust removal ash material supply device provides dust removal ash; an outlet of the dust removal ash material supply device is positioned above a tank opening of the molten iron tank; the molten iron tank is arranged on the molten iron tank overturning trolley; the stirring device is arranged on a desulfurization platform of the desulfurization station; when the molten iron tank is positioned in the stirring position of the molten iron tank; the stirring end of the stirring device can extend into the molten iron tank for stirring; when the molten iron tank is positioned in the molten iron tank crawler loading position, the molten iron tank overturning trolley overturns the molten iron tank; the crawler loader extends into the molten iron tank. The convertor dry process dust removal ash iron recovery system has the beneficial effects that on the premise of ensuring the desulfurization process completeness, equipment such as the crawler loader in the KR desulfurization station is used for forming the converter dust removal ash iron recovery device with the additionally installed material supply system and the like; the iron element in the dust removal ash is recovered; the goal of reusing the dust removal ash is achieved; meanwhile, the environmental pollution during the direct discharge is also reduced; the environment is protected; the reliability is realized.

Description

technical field [0001] The invention relates to the technical field of KR desulfurization for pretreatment of molten iron and steel, in particular to a converter dedusting ash iron recovery system and method based on a KR desulfurization station. Background technique [0002] The coal gas produced during converter steelmaking contains a large amount of iron-containing dust. Domestic steel mills mainly adopt dust removal technologies such as wet dust removal and dry dust removal. However, the ash after dry dedusting of converter gas still contains a large amount of Fe; according to the analysis, the amount of ash produced by dry dedusting of converter is 20kg / t molten steel, and the average TFe content in fine ash of dry dedusting of converter is 60.24%. Therefore, the dedusting ash after converter gas dry dedusting is a high-quality secondary resource with high recovery value. [0003] At present, the method of domestic recovery of iron in converter dry dust removal ash is ...

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Problems solved by technology

However, this method requires a supporting production process, which requires high investment and high operation and maintenance costs after being put into use.

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