A kind of beneficiation method of magnetite

A beneficiation method and magnetite technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of high water content, powder content, impurity and iron content, etc., to reduce failure rate and improve metal recovery rate and improve the effect of sorting indicators

Active Publication Date: 2021-07-02
MASTEEL GRP MINING CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the patent of the present invention is to shorten the existing magnetite beneficiation process through a new beneficiation process, better solve the problems of high impurity and iron content in the ore, high water content and powder content, improve operating efficiency, and reduce grinding energy consumption. Improve the grinding and separation effect and process stability, thereby improving the quality of the final concentrate product

Method used

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  • A kind of beneficiation method of magnetite
  • A kind of beneficiation method of magnetite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Shown, a kind of mineral processing method of magnetite, the step is:

[0035] A. The ore with a particle size of 0-350mm and a grade of 25%-35% is transported to a section of semi-autogenous mill 1 by the ore-collecting belt, and is self-ground to a particle size of -60mm;

[0036] B. The one-stage semi-autogenous mill discharges ore is screened by the linear sieve 2, and the products on the linear sieve 2 (-60mm—+3mm) are discarded by the weak magnetic dry separator 3, and the lump tailings are used as building materials, and the dry magnetic The concentrate enters the pebble crusher 4 for crushing, and the crushed products return to the semi-autogenous mill 1 for regrinding;

[0037] C, the product (-3mm) under the sieve of the linear sieve 2 enters a section of wet magnetic separator 5 for separation, the magnetic field strength is 350-400mT, and the grade of a section of magnetic concentrate is 45%-52%;

[0038] D. The first-stage magnetic concen...

Embodiment 2

[0047] Such as figure 2 As shown, the second-stage weak magnetic separator in Scheme 1 is interchanged with the first magnetic separation column. In addition to providing the purpose of beneficiation, the first magnetic separation column also plays a role in desliming the concentrate. After the ore is deslimed in advance, the operating efficiency of the subsequent high-frequency fine screen 9 process can be improved, and the mud content of the concentrate can be reduced. After magnetic separation by the second-stage weak magnetic separator, the inclusion of the concentrate can be reduced and the grade of the concentrate can be improved.

[0048] A kind of ore dressing method of magnetite, the steps are:

[0049] A. The ore with a particle size of 0-350mm and a grade of 25%-35% is transported to a section of semi-autogenous mill 1 by the ore-collecting belt, and is self-ground to a particle size of -60mm;

[0050] B. The ore discharge (-60mm) of the first-stage semi-autogenou...

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Abstract

The invention discloses a magnetite beneficiation method, which uses a semi-autogenous or autogenous mill to replace the crushing operation with a long process, improves the efficiency of the crushing operation, reduces the failure rate of the crushing operation, and can also realize early discarding; The separation operation adopts the two-stage grinding process of ball mill + tower mill to improve the grinding efficiency; the separation operation adopts two-stage weak magnetic separation + high-frequency fine screen + first magnetic separation column + second magnetic separation column to improve the separation index ; The stage tailings are recovered and concentrated by sweeping and then returned to grinding and re-election to improve the metal recovery rate; the primary and secondary magnetic tailings are classified into building materials by linear sieves for sale. The ore dressing method of the invention greatly improves the process stability and sorting precision while shortening the process flow, and improves the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of mineral dressing, and relates to a magnetite mineral processing method with short mineral processing process. Background technique [0002] Most domestic magnetite beneficiation adopts two, three or four stages of closed-circuit crushing plus stage grinding stage separation process. After the popularization and application of high-pressure roller mills in metallurgical mines, the crushing efficiency and grinding efficiency have been improved, but they are also The crushing process is lengthened and the process is complicated. However, in many underground mines, 1) the raw ore contains a lot of impurities and iron, and the iron remover cannot effectively solve it, and it is easy to damage the equipment; 2) the water and powder content is high, and it is easy to block the mine bin and funnel. These problems have a greater impact on the efficiency of the crushing and grinding process of the long process. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 王荣林张伟李明军王欢梁朝杰钱世湖杨松付
Owner MASTEEL GRP MINING CO LTD
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