Novel method for proportioning ore grinding media

A grinding medium and ore feeding technology, which is applied in the field of adding grinding medium to large ball mills, can solve the problems of poor crushing performance and poor grinding ability, and achieve the effects of increasing production rate, improving grinding efficiency and reducing production rate

Active Publication Date: 2011-06-22
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0004] In the past, the steel balls of large ball mills were added with a single ball diameter, and the diameter of the steel balls was either 127mm, 120mm, 110mm, 100mm, or 80mm, but no multi-diameter steel balls were added in proportion
Experience has proved that the larger the diameter of the steel ball, the better the crushing performance, but the poor grinding ability, suitable for coarse grinding; the smaller the diameter of the steel ball, the better the grinding performance, but the poor crushing performance, suitable for fine grinding

Method used

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  • Novel method for proportioning ore grinding media
  • Novel method for proportioning ore grinding media
  • Novel method for proportioning ore grinding media

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Experimental program
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Embodiment

[0040] For ∮5030×6700mm overflow ball mill:

[0041] 1) The composition of the ore feeding particle size of the ball mill is: the part of the ore feeding particle size of the ball mill that is less than 12mm must reach more than 93% of the total particle size

[0042] 2) The diameters of the grinding media of two different diameters are 120mm and 100mm steel balls,

[0043] 3) The weight ratio of steel balls with a diameter of 120mm and 100mm is 1:1,

[0044] 4) The filling rate of the grinding medium of the ball mill remains at 40%,

[0045] 5) The amount of grinding media added to the ball mill is 5 tons each time, the ball feeding cycle is once a day, and the diameters are 2.5 tons of 120mm and 100mm steel balls.

[0046] In the 2# system primary ball mill of a mineral processing workshop in a certain factory, the industrial test of adding grinding media using mixed steel balls was carried out. Under the condition that the added quantity was consistent with the current pr...

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Abstract

The invention relates to the technical field of ore grinding medium addition for large ball mills, in particular to a novel method for proportioning ore grinding media, which comprises the following steps of: (1) making regulations on composition of feed granularities for a ball mill; (2) adding two ore grinding media different in diameter at the same time according to the regulated composition of feed granularities; (3) keeping two ore grinding media different in diameter in proportion by weight of 1: (0.9-1.1); (4) keeping the filling ratio of the ore grinding media for the ball mill at 38-42%; and (5) determining the adding quantity and the adding cycle of the ore grinding media in each time according to the effective volume of the ball mill, wherein the ore grinding media are steel balls, the adding cycle of the ore grinding media respectively is 24h, 12h, 8h, 4h, or 2h, and the steel ball is 127mm, 120mm, 110mm, 100mm or 80mm in diameter. The method for proportioning the ore grinding media has the beneficial effects that the yield of coarse grade products is reduced, the yield of fine grade products is increased, the ore grinding efficiency of the ball mill is improved, and the composition of ore grinding granularities is improved at certain degree to satisfy the requirement of follow-up grading work.

Description

technical field [0001] The invention relates to the technical field of adding grinding media to large ball mills, in particular to a new proportioning method of grinding media. Background technique [0002] Large-scale equipment is the development direction of mineral processing plants, and the application of large ball mills is the development trend of mineral processing plants. In order to greatly improve the grinding effect and efficiency, it is necessary to use the best steel ball addition ratio with a suitable ball diameter, and the addition of multi-diameter steel ball ratio is the main development trend. [0003] In the sorting of minerals, red ore is more difficult to select. Its grinding characteristics are difficult to grind and easy to muddy. The selection of the ball diameter of the ball mill and the ratio of various steel ball diameters are its difficulties. Improvement and project research are of great significance. [0004] In the past, the steel balls of la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/20
Inventor 张建宋保莹
Owner ANSTEEL GRP MINING CO LTD
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