Dedusting ash micronization recycling technological method

Abstract

The invention relates to the technical field of ironmaking and raw material processing, in particular to a dedusting ash micronization recycling technological method. The component fluctuation of dust containing iron can be effectively controlled through a uniform pre-mixing measure, and the quality stability of sintered ore can be greatly improved. Due to the fact that the size fraction of the dedusting ash is extremely small, the dedusting ash directly participates in sintered ore burdening, the air permeability of a material layer can be seriously affected, the yield and the quality of the sintered ore are greatly affected, after micronization treatment is conducted, the air permeability of the mixed material layer is greatly improved, and the machine speed and the utilization coefficient of a sintering machine can be improved. The dedusting ash is micronized and then participates in sintering burdening, the dedusting ash can replace part of iron powder ore to a certain extent to play a granulation core role, and the burdening structure is optimized advantageously. By means of a sintering technology, harmful elements in raw materials, especially alkali metal, zinc metal, sulfur, arsenic and other harmful elements in the dedusting ash, are removed to a certain extent. The method is easy and convenient to operate and relatively low in cost and has the extremely high popularization value.

Description

technical field [0001] The invention relates to the technical field of ironmaking and raw material processing, in particular to a process method for fine particle recovery and utilization of dedusting ash. Background technique [0002] In the production process of iron and steel enterprises, it needs to go through production processes such as mineral processing, sintering, ironmaking, steelmaking, and steel rolling. Each process will produce some different industrial solid wastes, including sintering dust, blast furnace gas ash, and casting house dust , converter mud, gas mud, etc. The amount of solid waste produced by various iron and steel enterprises varies due to different process equipment, but these solid wastes are important secondary resources within iron and steel enterprises because they contain useful components such as iron, carbon, calcium oxide, and magnesium oxide. However, due to large fluctuations in its composition and physical properties, it is still very...

AI Technical Summary

Problems solved by technology

This recovery process is easy to operate and the production cost is relatively low, but from the perspective of long-term operation tracking, it has many impacts on the sintering process: First, the amount of these dust removal ash is large and varied, and the composition is unstable, resulting in The composition of sinter fluctuates greatly, and the quality is unstable; secondly, the dedusting ash has undergone a high-temperature roasting process, and has strong hydrophobicity and small particle size. Deterioration, resulting in a decrease in sintering production capacity

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