Mineral separation method for improving high-sulfur magnetite and hematite mixed ore separation indexes

Abstract

The invention discloses a mineral separation method for improving high-sulfur magnetite and hematite mixed ore separation indexes. The method comprises the steps that raw ore is subjected to the processes of stage grinding, flotation sulfur separating and low-intensity magnetic separation, low-intensity magnetic separation tailing is discharged, and qualified sulfur concentrate and magnetite concentrate products are obtained; strong magnetic separation is conducted on the discharged low-intensity magnetic separation tailing, high-intensity magnetic separation tailing T1 is discarded, and thena high-intensity magnetic rough concentrate is obtained; the obtained high-intensity magnetic rough concentrate is subjected to fine-sieve sieving work, and a retained product directly serves as tailing T2 to be discarded; and a fine-sieve through product is fed into a spiral chute gravity separation technology, spiral chute gravity separation tailing T3 is discarded, and a spiral chute gravity separation iron concentrate C is obtained, wherein the spiral chute gravity separation technology comprises the primary spiral chute rough separation step and the primary spiral chute fine separation step. The mineral separation method for improving the high-sulfur magnetite and hematite mixed ore separation indexes has the advantages that the grade of hematite concentrate TFe is high, the operationrecovery rate is high, the technological process is simple and easy to carry out, the indexes are stable, and operation and management are easy to achieve on the site.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a beneficiation method of high-sulfur magnetic-red mixed iron ore, which is especially suitable for improving the TFe grade of raw ore in the range of 35.0%-40.0%, and the proportion of iron in hematite to all iron. The index for sorting high-sulfur magnetic-red mixed iron ore with a ratio between 20% and 25%. Background technique [0002] The industrial iron minerals in the high-sulfur magnetic-red mixed iron ore are mainly magnetite, followed by hematite. The main mineral for comprehensive utilization is pyrite, and the main gangue minerals are diopside, feldspar, quartz, anhydrite and so on. The ore structure is dominated by euhedral-semi-euhedral crystal structure, followed by other morphic crystal structure, metasomatized false structure, metasomatized network or network vein structure and metasomatized residual structure. The ore structure is ma...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for improving the concentration of high-sulfur magnetic-red mixed iron ore in view of the technical problems such as low grade of hematite concentrate, low recovery rate or complex beneficiation process and high beneficiation cost in the prior art. The mineral processing method has the advantages of simple process flow, high grade of final hematite concentrate, high comprehensive recovery rate, clean and efficient

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