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Special-shaped ore grinding medium

A technology of grinding media and special shape, which is applied in the field of grinding media

Inactive Publication Date: 2016-02-17
YUNNAN PHOSPHATE CHEM GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The ore grinding medium of the present invention combines the advantages of steel balls in ore grinding, and the purpose is to overcome the serious defect of over-grinding using steel balls as fine grinding media in the existing ore grinding process, and to provide a method for reducing ore over-grinding and improving grinding efficiency. Mineral Quality Grinding Media

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Test conditions: The ore used in the test is a high-magnesium phosphate ore, which has been crushed to -1mm. The mill used for the test was Type mill, the filling rate is 40%, the addition amount of the two grinding media is 14Kg, the concentration of the grinding slurry is 65%, the grinding amount is 1Kg each time, and the grinding time is 11 minutes. Sieve analysis uses 0.074mm and 0.025mm sieves. The specifications and specific test results of the two grinding media are as follows:

[0020] New grinding medium: specification R=30mm, section circle diameter D=15mm;

[0021] Steel ball: specification R=30mm.

[0022] Table 1 Comparison test of two kinds of grinding media on the grinding effect of high-magnesium phosphate ore raw ore / %

[0023]

[0024] It can be seen from the test results in Table 1 that the grinding medium of the present invention has certain advantages over steel balls in the grinding effect of high-magnesium phosphate ore raw ore. Under the...

Embodiment 2

[0026] Test conditions: The ore used in the test is high-magnesium phosphate rock, which is taken from the sand settling of the cyclone. The mill used for the test was Type mill, the filling rate is 40%, the addition amount of the two grinding media is 14Kg, the concentration of the grinding slurry is 65%, the grinding amount is 1Kg each time, and the time is 11 minutes. Sieve analysis uses 0.074mm and 0.025mm sieves. The specifications and specific test results of the two grinding media are as follows:

[0027] New grinding medium: specification R=30mm, section circle diameter D=15mm;

[0028] Steel ball: specification R=30mm.

[0029] Table 2 Comparison test of two kinds of grinding media on the grinding effect of high magnesium phosphate rock cyclone sand settling / %

[0030]

[0031] As can be seen from the test results in Table 2, the ore grinding medium of the present invention has a better grinding effect on high-magnesium phosphate rock cyclone sand settling tha...

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Abstract

The invention relates to a novel ore grinding medium. A special-shaped ore grinding medium uses a spherical ore grinding medium as foundation; three spherical gaps with the same section circles are cut in the surface of the special-shaped ore grinding medium at intervals; values of diameters D of the section circles are between zero and a sphere radius R, that is, D is bigger than 0 and not bigger than R; and values of distances L from the circle centers of the section circles to the sphere center are FORMULA. The ore grinding medium is combined with advantages of the spherical medium, embodies better rotating performance of the spherical medium in the ore grinding process, adopts the point contact crushing, and is strong in crushing force; planes formed by cutting the surface of the medium are in surface contact with ores in the ore grinding process, so that excessive crushing can be relieved; and the ore grinding medium surface has the point contact crushing and the surface contact crushing. As the spherical surface of the surface of the medium has the stress concentration, the ore grinding medium is obvious in coarse ore crushing effect in the ore grinding process; and the plane of the medium surface can selectively grind coarse ores to protect fine ores so as to achieve the purposes of relieving excessive ore grinding and improving the ore grinding product quality.

Description

technical field [0001] The invention relates to a novel ore grinding medium, belonging to the field of ore grinding media. Background technique [0002] Grinding and grading is the last operation of mineral material preparation before selection, and it is the most important operation before mineral processing. The grinding operation has the characteristics of long process, large investment, high power consumption and material consumption, and the material consumption is mainly the consumption of grinding media, so that the cost of grinding media accounts for a large proportion of the entire grinding cost, which will inevitably affect the The cost of beneficiation has a greater impact, and the quality of grinding products directly affects the indicators of subsequent beneficiation operations. Therefore, in order to improve the grinding efficiency and reduce the grinding cost, it is necessary to conduct serious research on the main body of the grinding behavior - the grinding...

Claims

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Application Information

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IPC IPC(8): B02C17/20
Inventor 郭永杰陈赐云杜令攀钟晋黄灿辉
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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