Production process for ultrapure iron concentrate powder

A production process, ultra-pure iron technology, applied in the field of mineral processing, can solve the problems of large environmental impact and high production cost, and achieve the effect of low equipment cost, low cost and high grade

Inactive Publication Date: 2017-07-28
HEBEI IRON & STEEL GRP MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production cost of this process is high, and because the flotation process has a relatively large impact on the environment

Method used

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  • Production process for ultrapure iron concentrate powder

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: The production process of the ultra-pure iron fine powder adopts the following specific processes.

[0021] (1) The concentrate slurry with a grade of 67.3wt% is screened through a -200 mesh high-frequency fine sieve, and the product under the screen is subjected to magnetic separation twice by a magnetic separator with a magnetic field strength of 1000Gs, and the obtained magnetic concentrate grade is 71.4 wt%;

[0022] (2) The above-mentioned magnetic separation concentrate was elutriated twice, and the magnetic field strength was 7KA / m; the obtained ultra-concentrate grade was 72.02wt%, and the Si content was 0.4wt%;

[0023] (3) The ultra-pure ore is dehydrated and dried to obtain ultra-pure iron concentrate; the yield of ultra-pure iron concentrate is 79.6%, and the obtained comprehensive tailings grade is 58.7wt%.

Embodiment 2

[0024] Embodiment 2: The production process of the ultra-pure iron fine powder adopts the following specific process.

[0025] (1) The concentrate slurry with a grade of 67.8wt% is screened through a -200 mesh high-frequency fine sieve, and the products under the screen are subjected to magnetic separation for 3 times by a magnetic separator with a magnetic field strength of 1000Gs, and the obtained magnetic concentrate grade is 71.8 wt%;

[0026] (2) The above-mentioned magnetic separation concentrate was elutriated twice, and the magnetic field strength was 7KA / m; the obtained ultra-concentrate grade was 72.09wt%, and the Si content was 0.31wt%;

[0027] (3) The ultra-pure ore is dehydrated and dried to obtain ultra-pure iron concentrate; the yield of ultra-pure iron concentrate is 79.4%, and the obtained comprehensive tailings grade is 59.6wt%.

Embodiment 3

[0028] Embodiment 3: The production process of the ultra-pure iron fine powder adopts the following specific process.

[0029] (1) The concentrate pulp with a grade of 67.1wt% is screened through a -200 mesh high-frequency fine sieve, and the product under the screen is subjected to magnetic separation twice by a magnetic separator with a magnetic field strength of 1100Gs, and the obtained magnetic concentrate grade is 71.4 wt%;

[0030] (2) The above-mentioned magnetic separation concentrate was elutriated three times, and the magnetic field strength was 6KA / m; the obtained ultra-concentrate grade was 72.1wt%, and the Si content was 0.3wt%;

[0031] (3) The ultra-pure iron concentrate can be obtained by dehydrating and drying the ultra-concentrate; the yield of the ultra-pure iron concentrate is 79.5%, and the obtained comprehensive tailings grade is 58.7wt%.

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Abstract

The invention discloses a production process for ultrapure iron concentrate powder. The production process comprises the following process steps of: (1) performing (-)200-mesh screening on ore pulp to obtain undersized products; (2) magnetically separating the undersized products to obtain magnetically separated concentrate and tailings; (3) washing the magnetically separated concentrate to obtain ultrafine ores and tailings; and (4) dehydrating and drying the ultrafine ores to obtain ultrapure iron concentrate powder. According to the production process disclosed by the invention, production of ultrapure iron concentrate powder is realized through simple magnetic separation, so that a common flotation process is reduced; magnetic separation requires grinding fineness which is lower than that of flotation, a floatation process requires heating ore pulp and adding a plurality of reagents, and a magnetic separation process is relatively simple, so that ore grinding cost and grading cost are lower; and the flotation process is not easily controlled, used reagents have great influences on environment, and the magnetic separation process is simple and is free of influences on environment. The production process is simple in implementation process, is lower in investment, is simple in process, and is free of pollution; and the produced ultrapure iron concentrate powder is high in grade and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a production process of ultra-pure iron fine powder. Background technique [0002] The general production process of ultra-pure iron concentrate is to produce ultra-pure iron concentrate with a total iron grade greater than 72% by using two beneficiation methods, magnetic separation and flotation, after the iron ore has been crushed and ground to a certain fineness. The production cost of this process is high, and because the flotation process has a relatively large impact on the environment. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production process of ultra-pure iron fine powder with low cost and environmental protection. [0004] In order to solve the above-mentioned technical problems, the process steps adopted by the present invention are: (1) the ore slurry is screened through -200 mesh to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03C1/02B02C23/08
CPCB03B7/00B02C23/08B03C1/02
Inventor 张国强康庆民张津张春舫王浩明
Owner HEBEI IRON & STEEL GRP MINING
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