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Magnetic-gravity combined ore dressing technology for hematite

A combination of magnetic gravity and process technology, which is applied to the beneficiation of medium and high-grade hematite ore (iron grade ≥ 38%), and the combined beneficiation of medium and high-grade hematite ore. It can solve the problem of poor production technical indicators and the inability to obtain high Grade and other issues, to achieve significant emission reduction effects, realize large-scale comprehensive utilization, and reduce the number of equipment

Inactive Publication Date: 2012-11-14
SINOSTEEL MAANSHAN INST OF MINING RES +2
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Problems solved by technology

In the early 1960s, roasting-magnetic separation and single flotation processes were mainly used in China to process hematite ore, and the production technical indicators were poor.
The hematite ore pre-selection method introduced in the above literature can improve the grade of the pre-selection concentrate and throw out some tailings, but it cannot obtain high-grade hematite lump ore that can be directly put into the furnace

Method used

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  • Magnetic-gravity combined ore dressing technology for hematite
  • Magnetic-gravity combined ore dressing technology for hematite
  • Magnetic-gravity combined ore dressing technology for hematite

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Embodiment Construction

[0027] In order to further describe the present invention, a magnetic gravity combined beneficiation process technology of hematite ore of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0028] The ore processed in this example is the actual ore produced in the stope of Hainan Mining Co., Ltd., and the iron grade of the raw ore is 39.16%.

[0029] Multi-element analysis and iron phase analysis were carried out on the raw ore, and the results are shown in Table 1 and Table 2.

[0030] The analysis results show that the main useful mineral in the ore is hematite, followed by magnetite, the content of iron carbonate, iron silicate and pyrite is relatively low, and the iron of hematite accounts for 82.28%. The sulfur content of harmful impurities is 0.117%, and the phosphorus content is low, (CaO+MgO) / (SiO 2 +Al 2 o 3 )=0.176, it is an acidic ore.

[0031] Table 1 Results of multi-element analysis of raw ore (...

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Abstract

The invention discloses a magnetic-gravity combined ore dressing technology for hematite, comprising the following steps of: carrying out dry magnetic separation and jigging gravity separation to obtain blast furnace lump ore, throwing the tailings of the lump ore, carrying out first-stage ore grinding, weak magnetic separation, strong magnetic separation and centrifugal gravity separation on middlings, and carrying out second-stage ore grinding, weak magnetic separation, strong magnetic separation and centrifugal gravity separation. According to the technology, part of qualified blast furnace lump ore (the iron grade is large than 54%) can be obtained in advance, the massive tailings (the iron grade is less than 12%) can be thrown out, the quantity of the ball-milled ore (the middlings) can be greatly reduced, and the grinding and separation energy consumption can be greatly reduced. The massive tailings which are thrown out can replace the macadam and the stone to be taken as the building material, so that the comprehensive utilization of the bulk quantity of the tailings resource can be realized, and the technology is prominent in emission reduction effect; and the whole ore dressing technology is the magnetic-gravity combined ore dressing technological process, so that the flotation reagents can not be consumed, the technology is very friendly to the work environment and the neighboring environment, the environment can be protected, the pollution of the beneficiation reagent to the environment caused by the flotation work can be avoided, and the technology is particularly suitable for the ore dressing of the medium and high-grade (the iron grade is more than or equal to 38%) hematite.

Description

technical field [0001] The invention relates to a beneficiation method of hematite ore, in particular to a combined beneficiation method of middle and high grade hematite ore, especially suitable for beneficiation of middle and high grade hematite ore (iron grade ≥ 38%). Background technique [0002] Hematite is an important iron ore resource in my country, with poor selectivity, mainly distributed in Liaoning, Hebei, Gansu, Anhui, Inner Mongolia, Henan, Hubei, Shanxi, Guizhou, Hainan and other places. In the early 1960s, roasting-magnetic separation and single flotation processes were mainly used to process hematite ore in China, and the production technical indicators were poor. In the 1980s and 1990s, stage grinding, gravity separation-magnetic separation-acid positive flotation and stage grinding, gravity separation-magnetic separation-anion reverse flotation were adopted successively. In recent years, two-stage continuous grinding, intermediate Ore regrinding, gravity ...

Claims

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Application Information

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IPC IPC(8): B03C1/30
Inventor 郭风芳杨任新李俊宁黎龙珠袁启东王炬李亮
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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