Sintering method utilizing dust removal ash

Abstract

The invention relates to a sintering method utilizing dust removal ash. The method comprises the following steps of 1, calculating the proportion of a mixed ore to a solvent to a fuel to a return ore participating in material preparation according to a conventional sintering process, and carrying out primary mixing and secondary mixing according to a conventional process for granulation; 2, preparing the dust removal ash, iron ore concentrate and a binding agent according to the ratio of 1 to 2-4 to 0.04-0.06, and feeding a mixture into a strong mixing machine for mixing; 3, feeding materials mixed by the strong mixing machine into a disc pelletizer for pelletizing; and 4, mixing a small pellet prepared by the disc pelletizer with the mixture on a belt conveyor behind a secondary mixing machine, wherein the mixture is granulated through a primary mixing machine and the secondary mixing machine according to the step 1, and the mixture and the small pellet enter a sintering machine together for distribution, ignition and sintering. The method overcomes the defect that the dust removal ash is fine in particle size, the surface hydrophobicity is strong after the dust removal ash is polarized by the electric field, the surface energy is very low, so granulation is difficult to realize if sintering is directly applied, the granulation effect of the sintered mixture is improved, the sintering production can be stabilized, and the good quality of the sintered ore is ensured.

Description

technical field [0001] The invention relates to the technical field of sintering in the metallurgical industry, in particular to a method for sintering and utilizing dedusting dust. Background technique [0002] Sintering is one of the most polluting process links in the iron and steel production process. The main pollutants in the sintering process include particulate matter, SO2, NOx, fluoride and dioxins, etc. Among them, the particulate matter is mainly captured by various dust collectors before subsequent follow-up resource utilization. The dedusting ash of the sintering plant includes two categories: the process dedusting ash and the environmental dedusting ash. The process dedusting ash is further divided into the machine head dust removal ash and the machine tail dust removal ash. Among the above three types of dust, the machine head dust removal ash is the main source of sintering dust. At present, most of the sintering heads are mainly electrostatic precipitators,...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method that can improve the ash mixture that exists in the above-mentioned prior art with fine particle size and strong hydrophobicity. Granulation effect of sintering method using dedusting ash

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