Magnetic separation-centrifuge separation technology of micro-fine particle dissemination magnet-hematite mixed ore

Abstract

The invention relates to a magnetic separation-centrifuge separation technology of micro-fine particle dissemination magnet-hematite mixed ore. The magnetic separation-centrifuge separation technology is characterized by adopting a grading operating system of wet-type semi-autogenous grinding, stage grinding, phase flux weakening-strong magnetism, and strong magnetism concentrate-centrifuge; the magnetic separation-centrifuge separation technology has the following advantages: the wet-type autogenous grinding process is adopted, so that the crushing operation is reduced; the stage grinding and stage magnetic separation method is adopted, the single magnetic separation method is adopted to recycle vignite reaching monomer separation in advance so as to throw and collect iron mineral reaching monomer separation, the effects of cost decreasing and benefit increasing are realized, and the mineral reaching monomer separation is prevented from entering next operation; the centrifuge is adopted for grading, the technological processes are short, and the equipment is simple and easy to operate, does not pollute the environment, saves energy and reduces consumption.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, in particular to a kind of fine-grain embedded magnetic-red mixed ore [0002] magnetic separation-centrifuge separation process. Background technique [0003] In recent years, the domestic separation of lean iron ore has successfully adopted "continuous grinding, weak magnetic-strong magnetic-negative reverse flotation", "stage grinding, weak magnetic-strong magnetic-anion reverse flotation", "stage Grinding, coarse and fine classification, medium ore regrinding, heavy-magnetic-reverse flotation", "continuous grinding, coarse and fine classification, medium ore regrinding, heavy-magnetic-reverse flotation", "three-stage grinding, stage weak The magnetic-intensity magnetic-reverse flotation process has been promoted and applied in Anshan Iron and Steel Co., Ltd. and other domestic processing plants. [0004] These processes adopt three-stage crushing and screening of the raw ore,...

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Problems solved by technology

[0008]In this process, the particle size of the mixed magnetic concentrate after regrinding reaches -325 mesh 85%~90%. To achieve monomer dissociation, qualified grade magnetic concentrate can be obtained through magnetic separation, but the magnetite contained in the ore in the process that has reached monomer dissociation enters the reverse flotation operation, making the flotation operation Large consumption, which increases the processing capacity of flotation operations, and increases the dosage of flotation agents and beneficiation costs, resulting in the occurrence of some fine-grained magnetic ores that are not fully mineralized into the tailings of flotation operations, resulting in high tailings grades , large metal loss and other disadvantages, and the flotation operation will also cause environmental pollution

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