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Method for improving ore grinding particle size stability rate of super-huge type mill

A stable rate and super-large technology, which is applied in special data processing applications, design optimization/simulation, grain processing, etc., can solve the problem of low stability rate of design value overflow product particle size, unreasonable particle size and composition of grinding products, Grinding cost, steel ball consumption and power consumption increase

Pending Publication Date: 2021-03-19
太原钢铁(集团)有限公司 +1
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Problems solved by technology

[0003] In the process of production practice in recent years, it has been found that the particle size of grinding products has problems such as unreasonable particle size composition, the particle size of extremely fine products -19μm is significantly higher than the design value, and the hourly stability rate of overflow product particle size is low. Product particle size (-0.074mm content 89±1% hours) stability rate is only 65%
On the one hand, it will have many adverse effects on subsequent sorting operations. On the other hand, the cost of grinding, including steel ball consumption and power consumption, will increase significantly.

Method used

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  • Method for improving ore grinding particle size stability rate of super-huge type mill
  • Method for improving ore grinding particle size stability rate of super-huge type mill
  • Method for improving ore grinding particle size stability rate of super-huge type mill

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Embodiment Construction

[0020] The specific embodiment of the present invention is further described below by way of example.

[0021] 1. Process analysis: Sampling and analyzing the process indicators of the original ball mill classification process, the analysis content includes the mechanical performance indicators of the raw ore and the particle size composition parameters of the ball mill feed.

[0022] (1), mechanical properties of ore:

[0023] The maximum density of ore is 3.60g / cm 3 , minimum density 2.90g / cm 3 , with an average density of 3.36g / cm 3 , it can be seen that the ore density in this embodiment is relatively high, and it is easy to deposit and difficult to discharge in the grinding and grading cycle, and it is easy to produce overgrinding;

[0024] The maximum Platinum hardness coefficient of the ore is 29.7, which is extremely hard, and the minimum is 5.4, which is relatively soft. It can be seen that the distribution of hardness and softness in this embodiment is uneven, and...

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Abstract

The invention relates to a method for improving the stability rate of the grinding granularity of a super-huge type mill, belongs to the technical field of super-huge type ball mills, and solves the technical problems of improving the grinding efficiency and reducing the energy consumption.According to the method, the actual situation of hard ore treatment of the large-diameter ball mill is combined, and the steel ball system of the ball mill is obtained through a traditional beneficiation empirical formula; A large number of ore grinding tests are conducted, the proper steel ball proportion,the medium filling rate and the steel ball adding system are determined, the ore grinding energy consumption and the ore grinding cost of the ball grinding mill are reduced, the granularity composition of ore grinding products is optimized, the granularity stability rate of the ore grinding products is effectively increased, and process products reasonable in granularity distribution are providedfor subsequent sorting operation.

Description

technical field [0001] The invention belongs to the technical field of super-large ball mills, and in particular relates to a method for improving the stability rate of grinding particle size of super-large mills. Background technique [0002] The ore embedded in the company's mining area has fine particle size and high hardness (the Platinum hardness coefficient is greater than 25), and the designed grinding process is coarse crushing-semi-autogenous grinding-ball milling process (ie SAB process). The process creatively adopts large semi-autogenous mill, The SAB process of the large ball mill solves the problem of high-efficiency crushing and grinding of fine-grained and high-hardness iron ore. However, in order to achieve sufficient monomer dissociation of the ore to meet the requirements of subsequent sorting operations, the first stage of ball milling requires that the content of -0.074mm in the overflow product reach 87%-89%. [0003] In the process of production p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20B02C17/10
CPCG06F30/20B02C17/10
Inventor 李贤王英姿韩顺成郭鹏飞张建国周小东王斌
Owner 太原钢铁(集团)有限公司
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