A blast furnace dust recovery device and method

Abstract

The invention discloses a blast furnace precipitator dust recycling device and method. The blast furnace precipitator dust recycling device is provided with a molten iron main channel and a spraying gun. One end of the molten iron main channel is used for injecting molten iron, and the other end of the molten iron main channel is provided with a through hole which is used for draining the molten iron in the molten iron main channel. A notch is formed in a long edge wall of the molten iron main channel, the notch is used for discharging slag, and the position of the through hole is lower than that of the notch. The spraying gun is perpendicular to the molten iron main channel, and used for jetting blast furnace precipitator dust into the molten iron main channel. By adopting the blast furnace precipitator dust recycling device and method, the iron element in the blast furnace precipitator dust can be recycled, and centralized processing can be conducted on other harmful element substances.

Description

technical field [0001] The invention relates to a blast furnace dust removal ash recovery device and method. Background technique [0002] Blast furnace dedusting dust is the dust of the raw fuel discharged together with the blast furnace gas during the ironmaking blast furnace and the particles produced by the intense reaction in the high temperature zone. It contains free and combined states and complexes of various elements such as iron and carbon. Specifically, as shown in Table 1, iron oxide, alumina, silicon oxide and calcium oxide are mostly composed of iron oxide, aluminum oxide, silicon oxide and calcium oxide, which are light in weight, small in size and contain a variety of harmful and toxic substances, and are one of the main solid emissions from iron and steel enterprises. [0003] The main components of blast furnace dust [0004] [0005] Table 1 [0006] In blast furnace production, a large amount of blast furnace gas dust is separated from the gas by gr...

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Problems solved by technology

However, after the sinter with blast furnace dust is added to the blast furnace for smelting, the harmful elements in the blast furnace dust will circulate and enrich in the blast furnace, which will destroy the stability and safety of blast furnace production. Therefore, the proportion of blast furnace dust in sinter There are strict restrictions, so that the recycling of blast furnace dust is greatly limited

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