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Beneficiation method of efficiently recovering fine-grain low-grade magnetite

A beneficiation method and low-grade technology, applied in the direction of chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of magnetic reduction of magnetite particles, poor magnetic separation effect, unfavorable weak magnetic separation, etc., and achieve grinding The effect of reducing the amount, saving the cost of grinding, and reducing the adverse effects

Inactive Publication Date: 2017-11-07
YUXI DAHONGSHAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the beneficiation process, when the grinding particle size is coarse, the minerals cannot be fully dissociated, and the magnetic separation effect is poor; Ore, resulting in a decline in recovery, and is not conducive to weak magnetic separation and high grinding costs, so it is necessary to find the best grinding fineness

Method used

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  • Beneficiation method of efficiently recovering fine-grain low-grade magnetite
  • Beneficiation method of efficiently recovering fine-grain low-grade magnetite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the raw ore TFe grade corresponding to the second phase of the Dahongshan mining project is 33.38%, the mFe occupancy rate is 71.57%, and the SiO 2 The content is 23.45%. Above-mentioned raw ore beneficiation steps are as follows:

[0039] S100: Grinding the above-mentioned raw ore to -0.074mm, accounting for 70%, to obtain fine-grained ore I;

[0040] S200: Fine-grained ore I is subjected to weak magnetic separation with a magnetic induction intensity of 1100Oe at a feed concentration of 40% to obtain iron concentrate I and tailings I;

[0041] S300: The tailings I are subjected to strong magnetic separation with a magnetic induction intensity of 0.95T to obtain iron concentrate II and tailings II;

[0042] S400: Combine and grind iron concentrate I and iron concentrate II to -0.045mm, accounting for 80%, to obtain fine-grained ore II;

[0043]S500: Fine-grained ore II is subjected to weak magnetic separation with a magnetic induction int...

Embodiment 2

[0047] Such as figure 1 As shown, the raw ore TFe grade corresponding to the second phase of the Dahongshan mining project is 33.38%, the mFe occupancy rate is 71.57%, and the SiO 2 The content is 23.45%. Above-mentioned raw ore beneficiation steps are as follows:

[0048] S100: Grinding the fine-grained low-grade magnetite raw ore to -0.074mm, accounting for 75%, to obtain fine-grained ore Ⅰ;

[0049] S200: Fine-grained ore I is subjected to weak magnetic separation with a magnetic induction intensity of 1300-1300Oe at an ore concentration of 35 to obtain iron concentrate I and tailings I;

[0050] S300: The tailings I are subjected to strong magnetic separation with a magnetic induction intensity of 0.9T to obtain iron concentrate II and tailings II;

[0051] S400: Combining iron ore concentrate I and iron ore concentrate II to -0.045mm and accounting for 75% to obtain fine-grained ore II;

[0052] S500: Fine-grained ore II is subjected to weak magnetic separation with a...

Embodiment 3

[0056] Such as figure 1 As shown, the raw ore TFe grade corresponding to the second phase of the Dahongshan mining project is 33.38%, the mFe occupancy rate is 71.57%, and the SiO 2 The content is 23.45%. Above-mentioned raw ore beneficiation steps are as follows:

[0057] S100: Grinding the fine-grained low-grade magnetite raw ore to -0.074mm, accounting for 70%, to obtain fine-grained ore I;

[0058] S200: Fine-grained ore I is subjected to weak magnetic separation with a magnetic induction intensity of 1200Oe at a feed concentration of 45% to obtain iron concentrate I and tailings I;

[0059] S300: subject the tailings I to strong magnetic separation with a magnetic induction intensity of 1T to obtain iron concentrate II and tailings II;

[0060] S400: Combine and grind iron concentrate I and iron concentrate II to -0.045mm, accounting for 80%, to obtain fine-grained ore II;

[0061] S500: Fine-grained ore II is subjected to weak magnetic separation with a magnetic indu...

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Abstract

The invention discloses a mineral processing method for efficiently recovering fine-grained low-grade magnetite. Iron concentrate I and tailings I can be obtained by weak magnetic separation with a magnetic induction intensity of 1100-1300Oe; iron concentrate II and tailings II can be obtained from tailings I by strong magnetic separation with a magnetic induction intensity of 0.9-1T; iron concentrate I and iron Concentrate II is combined and ground to -0.045mm, accounting for 75-85% to obtain fine-grained ore II; fine-grained ore II is subjected to weak magnetic separation with a magnetic induction intensity of 1000-1200Oe to obtain iron concentrate III and tailings III; Iron concentrate IV and tailings IV are obtained by strong magnetic separation with a magnetic induction intensity of 0.560-0.783T, and iron concentrate III and iron concentrate IV are combined to obtain a total concentrate, and tailings II and tailings IV are combined to throw tailings. The invention has the characteristics of short process flow, less grinding amount, high beneficiation efficiency, iron recovery rate and high concentrate grade.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to a beneficiation method for efficiently recovering fine-grained low-grade magnetite with short flow, less ore grinding amount, high beneficiation efficiency, high iron recovery rate and high concentrate grade. Background technique [0002] my country's unutilized large and medium-sized iron ore reserves are 26.56 billion tons, of which low-grade iron ore reserves with a grade of less than 35% are 22.269 billion tons, accounting for 83.8% of the proven iron ore reserves. With the iron and steel industry With the rapid development of iron ore resources in China, domestic iron ore resources with good geological conditions, high resource grades, and good sorting properties can no longer meet the needs of the iron and steel industry, and iron ore resources with poor selectability or low grades will become one of the key points of development and utilization research. one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/02
CPCB03C1/02B03C2201/20
Inventor 詹忠杰刑志华蔺朝晖宋钊刚蔡正鹏温海滨焦栋蒲猛
Owner YUXI DAHONGSHAN MINING
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