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Separating technology of lean magnetic low grade iron ore

A low-grade iron ore technology, which is applied in the powder separation process of low-grade magnetic iron ore, can solve the problems of long construction period, high power consumption, complex process, etc. The effect of small investment and simple process

Inactive Publication Date: 2008-07-09
李志辉
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Problems solved by technology

This process improves the ore crushing, magnetic dry separation, ball milling, magnetic separation, high-frequency screening, magnetic separation, which are widely used in domestic medium and small ones, and increases the iron content of the ore to 50% to 60%. The selection process has the advantages of small investment and quick results, but there are still disadvantages such as complex process, long construction period, high power consumption, and large water consumption.

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  • Separating technology of lean magnetic low grade iron ore

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0008] The inventive concept of the present invention is to simplify the technological process of iron powder separation. In this process, only a crusher is used without a ball mill, and the granular matter below 3.5mm is directly magnetically separated after the material is sieved. attached figure 1 Provided is 500 tons of 20-grade iron ore first selection embodiment, see attached figure 1 , the technological process of the present invention is: 500 tons of 20-grade magnetic-poor low-grade iron ore are crushed with a crusher, and the mixed dry powder with a maximum particle size of less than 10 mm is sent into a silo with a volume of 10-50 tons, and the crushed iron ore is crushed with a conveyor belt The material in the silo is directly sent to the rolling sieve with a diameter of 1.2 meters, a length of 3 meters, 15KW, and a sieve aperture ...

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Abstract

The present invention relates to iron ore dressing technology, and is especially low grade lean magnetite powder separating process. The technological process includes crushing magnetite ore into mixture powder in a crusher, conveying mixture of grain size smaller than 10 mm into storage bin, sieving in a 3.5 mm pore size roller screen while adding water, returning the oversize for re-crushing, and magnetically separating the undersize in a magnetic separator to obtain grade-50 magnetite powder. The present invention has low investment, simple technological process, low cost, and low power and water consumption.

Description

technical field [0001] The invention relates to an iron beneficiation process, in particular to a powder separation process for low-grade iron ore with poor magnetism. Background technique [0002] At present, the price of international iron ore has risen by 19%, which is equivalent to an increase in the cost of 100 yuan per ton of steel. However, iron ore with an iron content of more than 35% is widely used in domestic iron ore mining, and iron ore with a low iron content of about 20% is widely used. The grade ore cannot be fully utilized. In order to save and make full use of resources, I invented the patent application number of "A process for magnetically depleted low-grade iron ore": 200610012751.0. The material is directly sent to the hammer crusher for fine crushing, and the finely crushed ore enters the roller sieve for screening, the granular and powdery materials with a particle size of less than 4mm enter the mud pump, and the granular materials with a particle si...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03C1/30B02C23/12
Inventor 李志辉
Owner 李志辉