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A method of grinding and magnetic separation

A magnetic separation and dry grinding technology, applied in the field of grinding magnetic separation, can solve the problems of water pollution and high energy consumption, and achieve the effects of simple separation method, high energy consumption and low energy consumption

Active Publication Date: 2018-02-09
张天昊 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although flotation is an effective means of sorting minerals, water pollution is serious, and some flotation processes need to be heated, resulting in high energy consumption

Method used

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  • A method of grinding and magnetic separation

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Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, a method of grinding and magnetic separation, the ore powder to be selected is 67.15% iron grade, of which magnetic iron is the main one, and 89% of the iron ore has a particle size below 71 μm.

[0020] The steps of a grinding and magnetic separation method are as follows: (1) dry grinding and magnetic separation of raw material powder to obtain concentrate 1F and tailings 1R; (2) wet grinding and magnetic separation of concentrate 1F to obtain concentrate 2F and tailings 2R; (3) Wet grinding and magnetic separation of concentrate 2F to obtain concentrate 3F and tailings 3R; (4) wet grinding and magnetic separation of concentrate 3F to obtain concentrate 4F and tailings 4R; (5) Wet grinding and magnetic separation to separate concentrate 4F to obtain concentrate 5F and tailings 5R. Concentrate 5F is the final concentrate with an iron grade of 69.62% and an iron recovery rate of 99.00%. The combined tailings 1R-5R are the final tailings, and...

Embodiment 2

[0024] The iron concentrate to be selected has an iron grade of 66.02%, mainly composed of fine-grained magnetic iron. Press as figure 1 A method of grinding and magnetic separation is shown.

[0025] The specific separation steps are: (1) Dry grinding and magnetic separation to separate raw material powders to obtain concentrate 1F and tailings 1R. The iron grade of concentrate 1F is 67.40%, and the iron recovery rate is 99.23%.

[0026] The involved dry grinding magnetic separation method is the same as in Example 1.

Embodiment 3

[0028] The iron concentrate to be selected is the same as in Example 2. Press as figure 1 A method of grinding and magnetic separation is shown.

[0029] The specific separation steps are: (1) wet grinding and magnetic separation of raw material powder to obtain concentrate 1F and tailings 1R; (2)-(8) wet grinding and magnetic separation of the concentrate obtained in the previous step to obtain Concentrate 8F and tailings 2R-8R. Concentrate 8F is the final concentrate with an iron grade of 68.91% and an iron recovery rate of 98.33%. The combined tailings 1R-8R are the final tailings, and the water in the separation process is recycled.

[0030] The wet grinding magnetic separation method involved is the same as in Example 1.

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Abstract

The invention discloses a method for grinding and magnetic separation. In the method, the mineral powder to be selected is firstly ground, the mineral particles are rubbed and dispersed, and then magnetically separated. The invention utilizes the electricity generating effect of friction and the shearing effect of friction to overcome the gravitational force between particles, provide fully dispersed mineral powder for magnetic separation, and further improve the sorting ability. Using the method of the present invention to separate the iron concentrate powder, after one dry grinding magnetic separation and four wet grinding magnetic separations, the iron grade of the iron concentrate powder is increased from 67.15% to 69.62%, and the iron recovery rate is 99.00% %. The invention is simple, environment-friendly, energy-saving and highly efficient.

Description

technical field [0001] The invention relates to a mineral separation method, in particular to a grinding and magnetic separation method. Background technique [0002] For the separation of fine-grained minerals, overcoming the electrostatic attraction between particles, van der Waals force, and capillary force in wet beneficiation is the prerequisite for improving the grade of concentrate. The reason why flotation is suitable for processing fine-grained materials is that the regulator can change the surface electrical properties of ore particles, the collector as a surfactant can reduce the capillary force between ore particles, and the combination of agents on the mineral surface The effect weakens the van der Waals force between ore particles, and makes the difference in mineral buoyancy, so that the sorting can get a high sorting index. Flotation is usually the final treatment process to obtain high-grade useful mineral beneficiation processes, such as: continuous grindi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C1/30B02C17/10
Inventor 张天昊王绍艳
Owner 张天昊
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