Accurate ball loading and adding method in dry ore grinding

It is a technology of accurately filling balls and precision balls. It is used in grain processing and other directions to improve the leaching rate and subsequent recovery rate, and improve the grinding effect.

Active Publication Date: 2013-12-11
云南云铜锌业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for accurately loading and replenishing balls in dry grinding, aiming at solving the problem that there is no method for accurately loading and replenishing balls in dry grinding in the prior art The problem

Method used

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Examples

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Example Embodiment

[0041] Example

[0042] The roasting-dry grinding-wet leaching process is used to treat zinc concentrate. After the zinc concentrate is roasted, it is sent to dry ball milling. The fineness of the grinding product is required to reach 300 mesh or more than 90%, and the grinding product is sent to the wet leaching operation. The mill is a 2.1×2.1m dry lattice type ball mill. The maximum ball loading capacity determined by the mill manufacturer in accordance with Document JB / T1406-1993 is 11 tons. The existing mill productivity is only 15 tons per hour. The final product The fineness of 0.05mm is only 66 to 74%.

[0043] Now adopt the accurate makeup filling method of the present invention, and the specific steps are as follows:

[0044] 1. Perform a full sieve analysis of the ore to be ground (calcined material), with the following particle size composition:

[0045] Grade (mm) +25 25~5 5~2.5 2.5~0.2 0.2~0.1 0.1~0.05 -0.05

[0046] Content (%) 0.05 3.04 1.32 28.86 46.93 17.62 2.18

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Abstract

The invention discloses an accurate ball loading and adding method in dry ore grinding. The method comprises the following steps: conducting comprehensive screen analysis on to-be-milled ore grains in a mill and determining the size composition of the to-be-milled ore grains and the scope of the grinding fine fraction; calculating the diameter of an accurate ball needed by the to-be-milled ore grains according to a semi-theoretical formula for ball diameter, obtaining the diameter of an optional ball within the fluctuating preset range according to the diameter of the accurate ball calculated in the step, comparing the ore-grinding effects according to the diameter of the accurate ball with the diameter of the optional ball, and selecting a plurality of groups of diameters as the diameters of primary loading balls; conducting compared grinding according to the plurality of groups of diameters of the primary loading balls to acquire the proportion of the primary loading balls of which diameters are less than those of the primary loading balls, and grinding the ore grains according to the proportion of the primary loading balls of which diameters are less than those of the primary loading balls.

Description

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Claims

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Application Information

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Owner 云南云铜锌业股份有限公司
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