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Method for accurately selecting diameters of steel rods of rod mills

A technology for selecting rods and steel rods, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve universal and targeted effects

Active Publication Date: 2017-05-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there is not a formula for calculating the diameter of steel rods in rod mills that is really theoretically derived.

Method used

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  • Method for accurately selecting diameters of steel rods of rod mills
  • Method for accurately selecting diameters of steel rods of rod mills
  • Method for accurately selecting diameters of steel rods of rod mills

Examples

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Embodiment 1

[0040] A method to accurately select the rod diameter of the rod mill, such as figure 1 As shown, the specific steps are as follows:

[0041] The ore to be processed is the alumina ore of Chalco Henan Zhengzhou Alumina Plant, and the size of the rod mill is 3.6×5.0 meters.

[0042] (1) Determination of comprehensive parameters of mechanical properties of ore:

[0043] Select 15 representative ores whose length, width and height are greater than 20cm before coarse crushing, and measure the secant Poisson's ratio of each ore on the material testing machine after making a standard test piece, which are: 0.250, 0.305, 0.265, 0.311, 0.303, 0.266, 0.321, 0.241, 0.202, 0.262, 0.322, 0.243, 0.232, 0.246, 0.288. According to the average secant Poisson's ratio value of 0.27, the comprehensive parameter K of the mechanical properties of the ore is calculated. c is 1.23.

[0044] (2) Determination of steel rod diameter:

[0045] Determine the 95% sieving particle size value d of rod ...

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Abstract

The invention relates to a method for accurately selecting diameters of steel rods of rod mills, and belongs to the field of ore grinding in ore dressing. The method comprises the following steps of: firstly calculating a mechanical property comprehensive parameter Kc according to secant Poisson ratio of ores; substituting a measured rod mill 95%-feeding screening particle size value d, a rock ore maximum uniaxial compressive strength <sigma>, an effective density <rho>e of a steel rod in ore pulp, an effective length l of the steel rod, a middle poly-condensation layer diameter D0 of the steel rod and a rotation rate <gamma> of a mill into a steel rod diameter calculation formula, so as to calculate an accurately determined steel rod diameter Dr; and finally carrying out ore grinding comparison experiment on the calculated Dr diameter and the other steel rods with different sizes under same conditions, so as to verify the accuracy of Dr via optimum ore grinding effect. According to the method provided by the invention, dozens of factors such as compressive strength and tenacity of the ore, the rotation rate of the mill, a filling ratio, an ore grinding concentration and the like are considered, so that the universality and pertinence are stronger, and a feasible method is provided for accurately selecting the diameters of the steel rods of the rod mills.

Description

technical field [0001] The invention relates to a method for accurately selecting the steel rod diameter of a rod mill, which belongs to the field of ore grinding in ore dressing. Background technique [0002] When the rod mill is used as a coarse mill to process ore with a specific particle size, its production capacity is 15-20% higher than that of a ball mill of the same specification. The rod mill mainly uses the grinding and extrusion action of the steel rod to crush the ore. When the rod mill is running, the steel rods shift positions in the mill and contact the mineral particles in a linear manner. The coarse particles between the clamp and the rods will be broken first, and the fine particles will pass through the gap between the steel rods, so the steel rods have Selective crushing of coarse grains and selective protection of fine grains, so the particle size uniformity of grinding products is better, and the phenomenon of over-grinding is less. [0003] The mediu...

Claims

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Application Information

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IPC IPC(8): G06F17/50B02C17/20
CPCB02C17/20G06F30/20
Inventor 肖庆飞曹亦俊陈禄政王国强杨芳
Owner KUNMING UNIV OF SCI & TECH
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