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Wet pre-separation process for copper-containing magnetite ore

A magnetite ore, wet-type technology, applied in the field of wet-type pre-selection of copper-containing magnetite ore, can solve problems such as waste of resources, achieve the effects of reducing the amount of grinding, enriching copper elements, and saving the cost of beneficiation

Pending Publication Date: 2020-10-30
马钢集团设计研究院有限责任公司
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AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of waste of resources caused by premature tailing of copper elements in the pre-selection process of copper-containing magnetite ore in the prior art, the present invention provides a wet pre-selection process of copper-containing magnetite ore, using wet magnetic separation, and The tailings of wet magnetic separation are screened, and the products on the screen are sold as building materials; the products under the screen are fed to the hydrocyclone with a ball mill discharge to form a closed-circuit grinding

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  • Wet pre-separation process for copper-containing magnetite ore

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Embodiment 1

[0029] like figure 1 Shown, the iron ore of the present embodiment, the TFe grade of iron ore raw ore is 38.45%, the occupancy ratio of magnetic iron in the ore is 81.33%, and copper element content is 0.053%, and the pre-selection process is as follows:

[0030] 1. Crushing: The raw ore is crushed by the three-stage one closed-circuit crushing process, and the particle size of the crushed product is -12mm (that is, a mesh screen with a 12mm sieve), and the under-sieve is copper magnetite ore particles;

[0031] 2. Wet coarse particle separation and ball milling: perform wet magnetic separation on the screened copper magnetite ore particles, the magnetic field strength is 0.45T, the ore concentration is 35%, and the yield of magnetic separation tailings is 23.97%. (TFe content 11.78%, Cu0.10%); Obtain magnetic separation concentrate TFe grade is 46.86%; The concentrate product after magnetic separation is put into ball mill ball mill;

[0032] 3. Screening of tailings product...

Embodiment 2

[0036] like figure 1 As shown, the copper-containing magnetite ore of the present embodiment has a TFe grade of 25.32%, a magnetic iron occupancy rate of 77.85% in the ore, and a copper element content of 0.058%. The pre-selection process is as follows:

[0037] 1. Crushing: The raw ore is crushed by the three-stage one closed-circuit crushing process, and the particle size of the crushed product is -12mm (that is, a mesh screen with a 12mm sieve), and the under-sieve is copper magnetite ore particles;

[0038]2. Wet coarse particle separation and ball milling: perform wet magnetic separation on the screened copper magnetite ore particles, the magnetic field strength is 0.48T, the ore concentration is 35%, and the yield of magnetic separation tailings is 37.59%. (TFe content 10.81%, Cu0.098%); Obtaining magnetic separation concentrate TFe grade is 34.06%; The product on the sieve after the concentrate product screening after magnetic separation is given into ball mill ball mil...

Embodiment 3

[0043] like figure 1 As shown, the copper-containing magnetite ore of the present embodiment has a TFe grade of 30.66%, a magnetic iron occupancy rate of 65.85% in the ore, and a copper element content of 0.12%. The pre-selection process is as follows:

[0044] 1. Crushing: The raw ore is crushed by the three-stage one closed-circuit crushing process, and the particle size of the crushed product is -12mm (that is, a mesh screen with a 12mm sieve), and the under-sieve is copper magnetite ore particles;

[0045] 2. Wet coarse particle separation and ball mill: Wet magnetic separation is carried out on the screened copper magnetite ore particles. The magnetic separator adopts internal magnetic separation and downstream magnetic separator with a magnetic field strength of 0.5T and an ore concentration of 40. %, the yield of the magnetic separation tailings product was 30.35% (TFe content 8.87%, Cu 0.138%); the obtained magnetic separation concentrate TFe grade was 35.36%; The abo...

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Abstract

The invention discloses a wet pre-separation process for copper-containing magnetite ore, and belongs to the technical field of ore separation. The method comprises the following steps that raw ore ofthe copper-containing magnetite ore is crushed, crushed products are screened, screened copper-containing magnetite ore particles are subjected to wet magnetic separation, and concentrate products obtained after magnetic separation are fed into a ball mill to be subjected to ball milling; tailings obtained after wet magnetic separation are screened, oversize products obtained after screening aredirectly discharged, the ore grinding amount of follow-up ball milling operation can be reduced, the ore dressing production cost is reduced, loss of the copper element is avoided as much as possible,and the oversize products are sold as building material products to increase benefits; the ball-milled ore discharge and undersize products are fed into a hydrocyclone for grading, and settled sand of the hydrocyclone is returned to the first-section ball mill to form closed-loop ore grinding; overflow products of the hydrocyclone enter subsequent sorting operation to sort magnetite and chalcopyrite, and therefore the technical effect that copper elements should be completely collected is achieved.

Description

technical field [0001] The invention belongs to the technical field of magnetite ore beneficiation, and more specifically relates to a wet pre-selection process of copper-containing magnetite ore. Background technique [0002] With the rapid exploitation of domestic mine resources year by year, my country's mine resources have become less rich ore, more lean ore, poor ore properties, fine crystal grain size, and difficult to sort. According to the actual situation, the traditional beneficiation process has gradually been replaced by the efficient, intelligent and targeted design of the beneficiation process for different ore properties. With the deterioration of ore properties year by year, the mining grade has decreased year by year, which has brought a greater impact on the operating cost of the concentrator. Due to the low grade of ore, the grade of ore into the grinding is low, the amount of grinding is large, the grinding cost is high, and the efficiency is low. In view...

Claims

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Application Information

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IPC IPC(8): B03C1/02B03C1/005B03C1/30B04C9/00
CPCB03C1/02B03C1/005B03C1/30B04C9/00
Inventor 孙业长陈孝文刘建华邓秀兰李保章耿希华李美鲜金振科
Owner 马钢集团设计研究院有限责任公司
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