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First separation process for lean magnetic iron ore

A low-grade, iron ore technology, applied in the direction of magnetic separation, solid separation, grain processing, etc., can solve the problems that cannot meet the social and environmental needs of energy saving and environmental protection, large equipment investment, and long construction time. Achieve the effect of small investment, large installation cost and reduced maintenance cost

Inactive Publication Date: 2006-11-08
李志辉
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Problems solved by technology

Its disadvantages are: firstly, to build a primary processing plant of the same scale, the investment in equipment is large, and generally requires 2 to 3 million RMB; Power consumption is large, and the final tailings are disposed of as all waste products
This process cannot well meet the social and environmental needs of energy saving and environmental protection.

Method used

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  • First separation process for lean magnetic iron ore

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. attached figure 1 Provided is 450 tons of 20-grade iron ore first selection embodiment, see attached figure 1 , The technical process of the present invention is: select 450 tons of 20-grade low-grade magnetic iron ore, and select 50 tons of rubble. Put the selected 400 tons of iron ore into a jaw crusher with a working power of 35KW for crushing. The crushed ore is dry-separated by a 10KW magnetization wheel. Machine fine crushing, the finely crushed material enters the 15KW, 4mm hole roller sieve, and adds 50 tons of water per hour to the roller sieve. Materials with a particle size greater than 4mm are returned to the hammer crusher and mixed with the raw materials crushed by the jaw crusher to continue crushing. The mud pump pumps the ore slurry less than 4mm into the 10KW magnetic separator for magnetic separation, and separates two produ...

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Abstract

The first separation process for lean magnetic iron ore includes: crushing ore in a jaw crusher, magnetizing and dry separating with magnetizing wheel, crushing in a hammer crusher, sieving with a roller screen, pumping ore material of granulation smaller than 4 mm with one slurry pump to a magnetic separator while returning large ore material to the hammer crusher, separating in the magnetic separator to obtain ore product and tailing, recovering tailing in a recovering machine to obtain iron ore powder, and sieving in a roller screen to separate out sand and other waste. The present invention has low investment, low water and power consumption and raised iron powder grade.

Description

technical field [0001] The invention relates to an iron ore beneficiation process, in particular to a primary beneficiation process for magnetically depleted and low-grade iron ore. Background technique [0002] At present, the domestic beneficiation process for magnetic-lean low-grade iron ore with an iron content of about 20% is: crushing the ore, magnetizing dry separation, ball milling, magnetic separation, high-frequency screening, and magnetic separation to increase the iron content of the ore To 50% to 60%, this process is called a selection. This technological process is widely used in domestic medium and small ones. Its disadvantages are: firstly, to build a primary processing plant of the same scale, the investment in equipment is large, and generally requires 2 to 3 million RMB; Power consumption is large, and the final tailings are disposed of as all waste products. This process cannot well meet the needs of the social environment of energy saving and environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B15/00B02C1/02B02C13/00B02C23/08B03C1/30
Inventor 李志辉
Owner 李志辉
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