Process for processing hematite ore containing iron carbonate

Abstract

The invention relates to a process for processing hematite ore containing iron carbonate. The process comprises the following steps that: ore is subjected to ore grinding to achieve monomer separation; concentrated ore obtained through magnetic separation of a weak magnetic separator, a medium magnetic separator and a strong magnetic separator are converged; the converged concentrated ore is subjected to coarse separation and fine separation sequentially by a floatation medicament with strong selective collection capacity on the iron carbonate to obtain iron carbonate concentrated ore; the obtained iron carbonate concentrated ore enters a thermal decomposition process; the decomposed ore enters a water-addition stirring tank to prepare ore pulp with appropriate concentration; the ore pulp and tailings after being subjected to floatation by the iron carbonate are mixed together for reverse floatation of the hematite; and after the reverse flotation, final concentrated ore and final tailings are obtained. The thermal decomposition process utilizes a rotary kiln to carry out thermal decomposition on the iron carbonate concentrated ore. The weight percentage of the appropriate concentration of the ore pulp is between 42 and 48 percent. The process can effectively reclaim the iron carbonate lost in the tailings, improves the grade of the final concentrated ore, provides referential significance for domestic similar ore separation and has remarkable economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of processing technology for hematite ore containing iron carbonate, in particular to a process for processing hematite ore containing iron carbonate. Background technique [0002] In recent years, in the separation process of hematite, a major technological breakthrough has been made in the grinding-medium-weak-strong magnetic-reverse flotation process, reaching the ideal technical indicators of concentrate grade of 67.5% and metal recovery rate of over 75%. However, when the hematite-based ore contains a certain amount of iron carbonate or the content of iron carbonate reaches more than 10%, its beneficiation technical indicators will seriously deteriorate, resulting in a sharp drop in concentrate grade and metal recovery rate. On the one hand, it affects the improvement of the blast furnace grade and reduces the utilization coefficient of the blast furnace; on the other hand, it causes the loss of mineral...

AI Technical Summary

Problems solved by technology

[0002] In recent years, in the separation process of hematite, a major technological breakthrough has been made in the grinding-medium-weak-strong magnetic-reverse flotation process, reaching the ideal technical indicators of concentrate grade of 67.5% and metal recovery rate of over 75%. However, when the hematite-based ore contains a certain amount of iron carbonate or the content of iron carbonate reaches more than 10%, its beneficiation technical indicators will seriously deteriorate, resulting in a sharp decline in concentrate grade and metal recovery rate.

On the one hand, it affects the improvement of the blast furnace grade and reduces the utilization factor of the blast furnace; on the other hand, it causes the loss of mineral resources

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