A beneficiation process for lava ore separation, grinding, separation, quality improvement and tail reduction

Abstract

The invention discloses a lava ore beneficiation process for grinding, sorting, improving quality and reducing tail, including one-stage grinding, one-stage weak magnetic separation, second-stage grinding A, second-stage weak magnetic separation, elutriation machine separation, three-stage weak magnetic separation Magnetic separation, salvage machine separation, one-stage strong magnetic separation, two-stage grinding B, two-stage strong magnetic separation, three-stage strong magnetic separation, gravity separation. The invention realizes separate grinding and separation of magnetite and hematite, reduces the contradiction between over-grinding and under-grinding, improves the efficiency of magnetic separation, improves the grade of final iron concentrate, reduces the grade of recovered ore from tailings, and increases production efficiency .

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a mineral processing process for lava ore separation, grinding, separation, quality improvement and tail reduction. Background technique [0002] Lava iron ore belongs to a single magnetite ore, the main metal minerals are magnetite, hematite, limonite, a small amount of siderite, and the main gangue minerals are albite, quartz, mica, chlorite and so on. The Dahongshan iron ore deposit, which accounts for about 18% of my country's iron ore resources, is a typical representative of volcanic rock deposits. The Dahongshan iron ore mainly includes deep iron ore and shallow lava iron ore. The original use of weak magnetic - strong magnetic mixed grinding "including one stage grinding, one stage weak magnetic separation, one stage strong magnetic separation, two stage grinding, two stage weak magnetic separation, three stage strong magnetic separation, centrifuge...

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Problems solved by technology

[0003] Because the above process of weak magnetic-strong magnetic mixed grinding is to put a section of mixed ore with weak magnetic field mainly composed of magnetite and a section of mixed ore with strong magnetic field mainly composed of hematite into the tower mill until the particle size is -325 mesh up to 90%, not only Over-grinding of magnetic ore will occur, and the number of secondary weak magnetic separation equipment will be increased, which will increase the cost. At the same time, the final iron concentrate grade is difficult to meet the requirements, and the grade of tailings recovered ore is also high

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