Ultra-lean hematite dressing process

A hematite and process technology, applied in flotation, magnetic separation, solid separation and other directions, can solve problems such as the reduction of iron concentrate grade, and achieve the effect of reducing beneficiation costs, ensuring technical indicators, and reducing load

Active Publication Date: 2011-04-20
ANSTEEL GRP MINING CO LTD
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, my country's lean hematite ore mostly adopts stage grinding, coarse and fine grading, gravity separation-strong magnetic-anion reverse flotation process. decrease accordingly

Method used

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  • Ultra-lean hematite dressing process
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Examples

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Embodiment Construction

[0023] The specific implementation of the present invention will be described below in conjunction with the examples.

[0024] Such as figure 1 Shown, a kind of extremely lean hematite mineral processing technology of the present invention is characterized in that comprising the following steps:

[0025] 1) First, the extremely poor hematite with a grade of 18-22% and a particle size of 0-12 mm is fed into the primary grinding until the content of -200 mesh in the primary overflow reaches 60%.

[0026] 2) The primary classification overflow is fed into a section of medium magnetic, the concentrate of a section of medium magnetic is fed into secondary classification, and the tailings of a section of medium magnetic are fed into a section of strong magnetic,

[0027] 3) The concentrate grade of a section of strong magnetic field is 40% and is given to secondary classification, and the grade of tailings of a section of strong magnetic field is 8-9% and discarded.

[0028] 4) Th...

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Abstract

The invention relates to the technical field of ore dressing, in particular to an ultra-lean hematite dressing process. The process is characterized by comprising the following steps of: performing primary grinding on the ultra-lean hematite with grade of 18 to 22 percent and granularity of 0 to 12 millimeters till the 200-mesh granule content of primary graded overflow reaches 60 percent, applying primary medium magnetism and primary strong magnetism to the primary graded overflow, abandoning the obtained tailings, performing secondary closed circuit grinding on the concentrate till the 200-mesh granule content of secondary graded overflow reaches 90 percent, performing primary concentration operation on the secondary graded overflow, then applying secondary medium magnetism and secondary strong magnetism to the secondary graded overflow, abandoning the tailings, performing secondary concentration operation on the mixed concentrate with grade of 40 to 50 percent, then performing rough flotation, fine flotation and third scavenging flotation, selecting final concentrate with grade of 67 to 68 percent, and abandoning the flotation tailings with grade of 12 to 13 percent. The process can develop and utilize the ultra-lean hematite with grade of 18 to 22 percent and reduce the dressing cost.

Description

technical field [0001] The invention relates to the technical field of beneficiation, in particular to an extremely poor hematite ore beneficiation process. Background technique [0002] At present, my country's lean hematite ore mostly adopts stage grinding, coarse and fine grading, gravity separation-strong magnetic-anion reverse flotation process. Then lower. With the continuous development of my country's economy, the demand for iron concentrate is also increasing, so the development of beneficiation process for extremely poor hematite is very important. Contents of the invention [0003] The purpose of the present invention is to provide a kind of extremely lean hematite beneficiation process that can improve the recovery rate of iron. [0004] The purpose of the present invention is achieved through the following technical solutions: [0005] A kind of extremely lean hematite ore dressing process of the present invention is characterized in that comprising the foll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B03C1/02B03D1/00
Inventor 徐冬林吴前锋傅国辉韦文杰
Owner ANSTEEL GRP MINING CO LTD
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