Fine product dry type separation iron fine powder technology

Abstract

The invention relates to the technical field of beneficiation in the metallurgical industry, and relates specially to a fine product dry type separation iron fine powder technology. The fine product dry type separation iron fine powder technology comprises the following steps that (1) a crushed raw ore is extruded into a material cake through a high-pressure grinding roller, the material cake is broken and merged into a magnetic separator unit to carry out magnetic separation, and coarse-size tailings separation and coarse-size middlings are obtained and returned to the high-pressure grindingroller; (2) coarse-size concentrates obtained in step (1) are subjected to winnowing classification to obtain coarse-size ore and fine-size ore, the coarse-size ore is returned to the high-pressure grinding roller in the step (1), the fine-size ore is subjected to the magnetic separation by the magnetic separator unit to obtain fine powder concentrates, fine powder middling concentrates and fine powder tailings; and the fine powder middling concentrates are returned to the high-pressure grinding roller; and (3) the fine powder concentrates obtained in the step (2) is subjected to elutriation and concentration to obtain the iron fine powder. According to the technology, through cooperation with the reasonable cooperation with magnetic separation and the winnowing, impurities which are useless are thrown away as early as possible; and meanwhile, double magnetic separation treatments are carried out, so that the grade of the final iron fine powder is improved, and the ore dressing efficiency of equipment is improved.

Description

technical field [0001] The invention relates to the technical field of beneficiation in the metallurgical industry, in particular to a process for dry-type separation of finely crushed iron fine powder. Background technique [0002] Iron and steel industry is the basic industry of the national economy, and iron ore is the main raw material of iron and steel. The demand is on the rise, and it is also the two fastest-growing directions of the iron and steel industry. Therefore, the production of high-grade iron concentrates can meet the needs of these two industries and increase the added value of products. A new approach to economic efficiency. [0003] Iron ore is crushed, ground, ore-dressed and processed into ore powder called iron concentrate, iron concentrate is the main raw material for sintering, and changes in the iron content will directly affect the quality of the finished sinter. With the increase of my country's demand for ultra-pure iron concentrates, the numbe...

AI Technical Summary

Problems solved by technology

With the increase of my country's demand for ultra-pure iron concentrates, the number of enterprises producing ultra-pure iron concentrates is increasing, and the output and scale are also expanding. Wide range of quality fluctuations, high production costs and heavy equipment maintenance workload

In order to obtain ultra-pure iron powder, some production processes use chemical methods to purify, which has the problem of environmental pollution

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