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Energy-saving ore dressing method for treating fine grained magnetite

A mineral processing method and fine-grained technology, which is applied in the energy-saving mineral processing field of processing fine-grained magnetite, can solve the problem that the magnetic iron-poor conjoined organisms cannot pass through multiple magnetic separations, the investment in fine grinding equipment is large, and the product quality is not good. Advanced problems, to achieve the effect of high grinding energy consumption and cost, saving grinding energy consumption, and increasing the coarse grinding fineness

Inactive Publication Date: 2018-04-13
CHANGSHA RES INST OF MINING & METALLURGY +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the fine-grained to extremely fine-grained magnetite ore, the main problems in the above mineral processing process are: (1) The magnetic iron minerals need to be finely ground until the basic monomers are dissociated, and the investment in the grinding equipment in the fine grinding section is large and the grinding process is difficult. High energy consumption and high beneficiation cost; (2) A single magnetic separation process of stage grinding and stage separation is adopted. Although the process is simple, there is a problem of low product quality, mainly because the magnetic iron-poor (3) Using the reverse flotation process to refine and reduce impurities, although better technical indicators can be obtained, but the cost of flotation is relatively high

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  • Energy-saving ore dressing method for treating fine grained magnetite
  • Energy-saving ore dressing method for treating fine grained magnetite

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Embodiment 1

[0041] Iron minerals in the ore processed in this embodiment are mainly magnetite, followed by siderite, and a small amount of specularite and limonite in addition; quartz is the most high content in the gangue minerals, followed by chlorite, Black hard chlorite and apatite, etc.; the particle size of magnetite in this ore is generally relatively uniform and fine, ranging from 0.01 to 0.2mm. The statistical results of the microscopic measurement of the embedded particle size of the magnetite show that the magnetite in the ore belongs to the category of relatively uniform fine-grained embedded distribution. From the point of view of embedded particle size alone, in order to dissociate more than 95% of the magnetite, it is necessary to choose a grinding fineness of -0.026mm (-600 mesh accounts for 95%).

[0042] The energy-saving beneficiation method of processing fine magnetite of the present embodiment, its technological process is as follows figure 1 As shown, the specific p...

Embodiment 2

[0055] The main constituent mineral types in the ore processed in this embodiment are relatively simple. The iron minerals are mainly magnetite, followed by specularite; the gangue minerals are mainly quartz, followed by iron dolomite, sericite, and chlorite. stone, talc and tremolite. The magnetite in this ore is in the shape of euhedral and semi-euhedral equiaxed grains, and the crystal grain size is relatively small, except for a few that can reach about 0.2mm, generally below 0.06mm, and some are even smaller than 0.005mm; It is characterized by extremely uneven distribution of fine grains to fine grains. From the point of view of embedded particle size alone, in order to dissociate more than 95% of iron minerals, the grinding fineness of -0.038mm (-400 mesh) accounts for more than 95%.

[0056] The energy-saving beneficiation method of processing fine magnetite of the present embodiment, its technological process is as follows figure 2 As shown, the specific process st...

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Abstract

The invention discloses an energy-saving ore dressing method for treating fine grained magnetite. The energy-saving ore dressing method comprises the steps that iron ore is successively subjected to first-section grinding and grading, first-section low intensity magnetic separation, second-section grinding and grading, second-section low intensity magnetic separation, first-section elutriation magnetic separation, third-section grinding and grading, third-section low intensity magnetic separation and second-section elutriation magnetic separation, obtained first-section elutriation magnetic separation concentrate and second-section elutriation magnetic separation concentrate are combined into total concentrate, and all low intensity magnetic separation tailings are combined into a total tailing. According to the energy-saving ore dressing method for treating the fine grained magnetite, by adopting an elutriation magnetic separation technique, under the condition of the coarse grindingfineness, magnetic iron minerals after basic monomer separation are subjected to early recovery, the yield of iron ore concentrate after early recovery reaches 15-45%, the quantity of the subsequent ore needing to be subjected to fine grinding is reduced significantly, grinding energy consumption is saved, and energy consumption of an ore dressing technology of the energy-saving ore dressing method is reduced by more than 30% compared with energy consumption of an ore dressing technology in the prior art; and third-section low intensity magnetic concentrate is extracted by adopting the elutriation magnetic separation technique, the grinding fineness can be coarsened effectively, and the grade of the iron ore concentrate is improved by more than two percentage points.

Description

technical field [0001] The invention relates to an iron ore beneficiation method, in particular to an energy-saving ore beneficiation method for processing fine magnetite. Background technique [0002] my country's iron ore resources are rich in lean ore and less in rich ore, and its main characteristics are "poor", "fine" and "miscellaneous", and the average iron grade is low. With the rapid development of my country's iron and steel industry, the demand for finished iron ore is increasing, the amount of easy-to-select iron ore that can be mined and utilized is gradually decreasing, the objects of mineral processing are increasingly diluted, and the iron minerals in the ore gradually tend to be fine-grained~ The characteristics of extremely fine grain embedding make mineral processing more difficult, and the cost of mineral processing is greatly increased. [0003] At present, the beneficiation processes for processing fine-grained magnetite ore resources mainly include: st...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 陈雯白鹰唐雪峰李智远刘兴华周娜严小虎路振毕麦笑宇张东田建利吴承优王祥廖振鸿彭泽友王秋林张立刚罗良飞
Owner CHANGSHA RES INST OF MINING & METALLURGY
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