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Method for determining grinding granularity of ores based on ore properties

A technology for grinding particle size and ore, which is applied in particle size analysis, particle and sedimentation analysis, measuring devices, etc., and can solve problems such as calculation result errors

Active Publication Date: 2012-10-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, so far, the formula that can calculate the grinding energy consumption and the grinding particle size through the grinding energy consumption is still the Bond work index formula, but this formula is an empirical formula, and the determination of the work index is affected by the grinding particle size, not A constant, the calculation result has a large error with the actual, so there is no method to determine the appropriate grinding particle size
There is no method to directly calculate the optimal grinding particle size through the mechanical properties of ore

Method used

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  • Method for determining grinding granularity of ores based on ore properties
  • Method for determining grinding granularity of ores based on ore properties
  • Method for determining grinding granularity of ores based on ore properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The processed ore is quartzite mixed copper ore.

[0067] (1) Determination of ore mechanical properties

[0068] Take 20 representative quartzite mixed copper ores, cut 10 of them into standard test pieces according to the requirements of material mechanics experiment, measure the elastic modulus and ultimate stress of each ore test piece on the material testing machine, and calculate 10 The arithmetic mean of the measurement results, the elastic modulus E is 897600kg / cm 2 , the ultimate stress σ is 680kg / cm 2 Other 10 pieces of ore are processed into the test piece that is suitable for splitting work method to measure specific surface energy, adopt the method for splitting work method to measure specific surface energy to measure the specific surface energy of 10 pieces of ore respectively, calculate 10 measured results The arithmetic mean γ is 2.577 kg / cm;

[0069] (2) Determination of the particle size of the ore entering the mill

[0070] The elastic modulu...

Embodiment 2

[0072] The processed ore is limestone mixed copper ore.

[0073] (1) Determination of ore mechanical properties

[0074] Take 20 representative limestone mixed copper ores, cut 10 of them into standard test pieces according to the requirements of the material mechanics experiment, measure the elastic modulus and ultimate stress of each ore test piece on the material testing machine, and calculate 10 The arithmetic mean of the measurement results, the elastic modulus E is 816000kg / cm 2 , the ultimate stress σ is 510kg / cm 2 ; Another 10 ores are processed into the test piece that the contact angle method is used to measure the specific surface energy, and the method of measuring the specific surface energy by the contact angle method is used to measure the specific surface energy of 10 ores respectively, and calculate the arithmetic of 10 measurement results The average value γ is 2.125kg / cm;

[0075] (2) Determination of the particle size of the ore entering the mill

...

Embodiment 3

[0078] The processed ore is granite copper sulfide ore.

[0079] (1) Determination of ore mechanical properties

[0080] Take 20 representative granite mixed copper ores, cut 10 of them into standard test pieces according to the requirements of material mechanics experiment, measure the elastic modulus and ultimate stress of each ore test piece on the material testing machine, and calculate 10 The arithmetic mean of the measurement results, the elastic modulus E is 1224000kg / cm 2 , the ultimate stress σ is 918kg / cm 2 ; Another 10 ores are processed into the test piece that the contact angle method is used to measure the specific surface energy, and the method of measuring the specific surface energy by the contact angle method is used to measure the specific surface energy of 10 ores respectively, and calculate the arithmetic of 10 measurement results The average value γ is 4.371kg / cm;

[0081] (2) Determination of the particle size of the ore entering the mill

[0082...

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Abstract

The invention relates to a method for determining the grinding granularity of ores based on ore properties. In order to solve the problem that appropriate grinding granularity is difficult to determine in the dressing plant designing process, the appropriate grinding granularity is calculated through a theoretical calculation formula of the grinding granularity by testing the limit stress, elastic modulus and specific surface energy of the ores, so that a theoretical basis is provided for the selection of crushing equipment and ore grinding equipment, and a condition is created for grinding energy conservation of a designed dressing plant. By the method, a small number of ore mechanical parameters are referred, the grinding granularity can be measured by the conventional detection method,and a calculation method is simple; and the method is high in practicability and has an important effect on energy-saving levels of dressing plants.

Description

[0001] technical field [0002] The invention relates to a method for determining the grain size of ore entering grinding based on ore properties, and belongs to the technical field of mineral processing. Background technique [0003] In the field of mineral processing technology, the ore is ground to achieve monomer dissociation between useful minerals and gangue minerals, and the energy consumed accounts for 40% to 60% of the total energy consumption of mineral processing. Energy saving in the process of ore grinding has always been one of the hot issues in the field of mineral processing technology. Ore crushing and ore grinding constitute the two links of ore grinding, but the energy consumed by the two methods is different. Generally speaking, the energy required for crushing ore is lower than the energy required for grinding fine ore, so more crushing and less grinding It becomes the principle of energy saving in the process of ore crushing and grinding. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02B02C23/00
Inventor 文书明张文彬彭金辉方建军刘殿文张仪柏少军邓久帅先永骏赖远辉鲁相林
Owner KUNMING UNIV OF SCI & TECH
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