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Cylindrical medium proportioning method for fine grinding of collophanite

A collophosphate and cylindrical technology, applied in the field of ore crushing and grinding, can solve problems such as unreasonable medium ratio, and achieve the effect of reducing overgrinding phenomenon and improving grinding efficiency.

Inactive Publication Date: 2014-07-23
YUNNAN PHOSPHATE CHEM GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cylindrical grinding medium ratio for collophosite fine grinding in order to overcome the defects caused by the use of steel balls as the fine grinding medium and the unreasonable ratio of the media in the existing fine grinding process method

Method used

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  • Cylindrical medium proportioning method for fine grinding of collophanite
  • Cylindrical medium proportioning method for fine grinding of collophanite
  • Cylindrical medium proportioning method for fine grinding of collophanite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Actual measurement of a low-grade collophosite ore σ (uniaxial compressive strength) = 711.61kg / cm 2 , f (Platinum hardness) = 7.12, elastic modulus is 7.22×10 5 kg / cm 2 , is medium-hard to soft ore, Poisson's ratio =0.341, which belongs to the ore with high toughness.

[0021] (2) Screen and analyze the new feed of the ball mill, the specific data is shown in Table 1:

[0022] Level (mm) Yield Cumulative yield on sieve Cumulative yield under sieve +5.0 0.14 0.14 100.00 5.0～2.0 1.51 1.65 99.86 2.0～0.9 6.03 7.68 98.35 0.9～0.45 7.44 15.12 92.32 0.45～0.2 15.55 30.67 84.88 0.2～0.15 22.99 53.66 69.33 0.15～0.10 12.09 65.75 46.34 0.10～0.074 11.28 70.03 34.25 0.074～0.038 12.61 89.64 22.97 0.038～0.028 5.64 95.28 10.36 0.028～0.019 2.03 97.31 4.72 0.019～0.010 0.87 98.18 2.69 -0.010 1.82 100.00 1.82 total .00 － －

[0023] From the above table, we c...

Embodiment 2

[0033] (1) Measured a medium-low grade collophosite ore σ=973.67kg / cm 2 , f=9.74, the modulus of elasticity is 7.18×10 5 kg / cm 2 , is medium-hard to soft ore, Poisson's ratio =0.264, which is a brittle ore.

[0034] (2) Screening and analysis of the new feed to the ball mill, the specific data are as follows:

[0035] Level (mm) Yield Cumulative yield on sieve Cumulative yield under sieve +5.0 3.15 3.15 100.00 5.0～2.0 6.89 10.04 96.85 2.0～0.9 8.37 18.41 89.96 0.9～0.45 7.10 25.48 81.59 0.45～0.2 23.89 49.37 74.52 0.2～0.15 4.95 54.32 50.63 0.15～0.10 17.00 71.32 45.68 0.10～0.074 9.96 81.20 28.68 0.074～0.038 15.44 96.72 18.72 0.038～0.028 1.12 97.84 3.28 0.028～0.019 0.86 98.70 2.16 0.019～0.010 1.03 99.73 1.30 -0.010 0.27 100.00 0.27 total .00 － －

[0036] From the above table, we can see that the ore fed by the ball mill is relatively fine, and the maxi...

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Abstract

The invention relates to a cylindrical medium proportioning method for fine grinding of collophanite. The method comprises the steps of determining the mechanical property of ores, performing screen analysis on feedstock of a grinding machine, deducting the grinding grade which is not required, converting the composition of the feeding size to be ground, calculating the steel ball diameter required by ore grains in all grades with a Duan's sphere diameter semi-theoretical formula, determining the steel ball ratio of the grinding machine according to the ore grain yield of each group of the feedstock to be ground and the yield of the required steel balls in different diameters, and then determining the ratio of the cylindrical mediums according to the steel ball ratio. The method is utilized to process the collophanite, the content of below 0.074mm grade can be improved, and the content of 0.074-0.038mm, which is in an easily-choosing grade, is improved. The ore grinding products obtained by the method have reasonability in grain fineness distribution, and the grading index in the following grading operation can be effectively improved.

Description

technical field [0001] The invention relates to a cylindrical medium proportioning method for finely grinding collophosite, which belongs to the technical field of ore crushing and grinding. Background technique [0002] At present, the grinding medium for fine grinding of collophosite mainly uses steel balls as the fine grinding medium, and high-chromium steel balls and low-chromium alloy steel balls are widely used. It is slightly longer, but due to the limitation of its shape, size and other factors, the yield of the non-grinding grade and the over-grinding grade are both high. In addition, this kind of steel ball generally has a high price, so the total production cost relatively high. [0003] Taking phosphate rock in Haikou, Yunnan as an example, steel balls are used as the grinding medium for fine grinding. As the grade of the selected raw ore decreases, the content of impurities increases, the hardness of the ore increases, and the properties of the raw ore change, ...

Claims

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Application Information

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IPC IPC(8): B02C23/00B02C17/10
Inventor 李耀基郭永杰方世祥柏中能方福跃彭有强王静明杜令攀钟晋
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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