Beneficiation technology of surface hematite and magnetite mixture with high slime viscosity

A viscous, surface red technology, applied in the field of high mud viscous surface red, magnetic mixed iron ore beneficiation process, to achieve the effect of lengthening the number of operating sections, reducing consumption and avoiding blockage

Inactive Publication Date: 2018-12-21
中冶北方(大连)工程技术有限公司
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Problems solved by technology

[0004] The object of the present invention is a high mud sticky surface red and magnetic mixed iron ore beneficiation process that can effectively s

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  • Beneficiation technology of surface hematite and magnetite mixture with high slime viscosity
  • Beneficiation technology of surface hematite and magnetite mixture with high slime viscosity

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Embodiment Construction

[0038] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0039] Such as figure 1 and figure 2 Shown, a kind of high-mud viscosity surface chromatic, magnetic mixed iron ore beneficiation process of the present invention is characterized in that, the ore processed is iron grade 41.8%, and ore slime content is 30% red, magnetic mixed iron ore, including coarse The three-stage crushing process of crushing operation, medium crushing operation and fine crushing operation also includes a ball mill-cyclone closed-circuit grinding operation-a magnetic separation operation, a gravity separation operation, a coarse and finer cyclone operation, and a second-stage ball mill -Ore beneficiation process consisting of cyclone closed-circuit grinding operation, secondary coarse and fine grading cyclone operation, secondary gravity separation operation, secondary magnetic separation operation and revers...

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Abstract

The invention relates to a beneficiation technology of a surface hematite and magnetite mixture with the high slime viscosity. The technology is characterized in that the processed ore is the hematiteand magnetite mixture with the iron grade being 41.8% and the slime content being 30%; and the technology comprises three crushing processes including coarse crushing operation, intermediate crushingoperation and fine crushing operation and further comprises a beneficiation process composed of one-stage ball milling-swirler closed circuit ore grinding operation-primary magnetic separation operation, primary gravity concentrating operation, primary coarse and fine grading swirler operation, two-stage ball milling-swirler closed circuit ore grinding operation, secondary coarse and fine gradingswirler operation, secondary gravity concentrating operation, secondary magnetic separation operation and reverse flotation operation. The beneficiation technology has the advantages that the blockage problem in crushing operation is effectively solved, concentrate can be classified into iron concentrate I with the grade being 62% and iron concentrate II with the grade being 60%, the iron concentrate I is higher in price and capable of being used as pellet feed, the iron concentrate II is relatively low in price and capable of being used as sintering materials, and the market adaptability ofthe iron concentrate is expanded.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, in particular to a process for beneficiating high-mud viscous surface red and magnetic mixed iron ore. Background technique [0002] At present, in many open-pit iron mines, due to the difference in the degree of oxidation of minerals exposed to oxygen, the surface ores are generally dominated by hematite and false hematite, and contain some magnetite and iron-bearing clay. According to the hydration degree and crystal structure of oxide ore, oxide ore can be divided into hematite, limonite and goethite. Due to long-term oxidation, erosion, hydration and weathering of surface ore, surface ore generally presents the characteristics of severe mudification, high slime content and sticky ore. At present, gyratory crushers and jaw crushers are mostly used for primary crushing in iron mines. The ore outlet of this type of primary crushing equipment is easily blocked by high-silt, high-w...

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 杨海龙李国洲
Owner 中冶北方(大连)工程技术有限公司
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