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A kind of ball mill liner and its manufacturing method

A ball mill liner and manufacturing method technology, which is applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of the service life of the liner not reaching the expected effect, affecting the working efficiency of the ball mill, and restricting the normal operation of the ball mill, so as to reduce the phenomenon of cracking , thicken the thickness, improve the effect of wear resistance

Active Publication Date: 2018-05-15
鞍钢集团(鞍山)铁路运输设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A steel company installed a new φ6.2×9m ball mill in a concentrator in 2014. It is currently the largest ball mill in the area. Compared with other mills, the lining plate on the inner wall is relatively larger in size. It is the increase of the thickness of the liner, which causes the quenching effect in the heat treatment process to be poor, and the core of the liner is not completely hardened, resulting in the service life of the liner not reaching the expected effect and affecting the working efficiency of the ball mill
[0003] According to statistics, this type of ball mill used a total of 4 sets of ball mill liners from 2014 to early 2016, and the running time ranged from 1484 hours to 2077 hours, resulting in frequent replacement of ball mill liners, which seriously restricted the normal operation of the ball mill, and urgently needed to improve the use of liners life

Method used

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  • A kind of ball mill liner and its manufacturing method
  • A kind of ball mill liner and its manufacturing method
  • A kind of ball mill liner and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A ball mill liner, the ball mill liner comprises the following chemical components in weight percentage: C 0.50%, Si 0.40%, Mn 0.5%, P 0.01%, S 0.01%, Cr 2.0%, Mo 0.2%, Cu 0.1 %, Ni 0.2%, the rest is Fe and unavoidable impurities.

[0032] A method for manufacturing a liner for a ball mill, comprising the steps of:

[0033] 1) The smelting equipment adopts an electric arc furnace, and the above-mentioned raw materials except nickel are put into the electric arc furnace according to the weight percentage ratio for smelting. The nickel plate conveying device sends the nickel plate into the molten steel from the filling port of the electric arc furnace, and continuously stirs the molten steel through the nickel plate conveying device, so that the nickel plate is evenly dissolved in the molten steel;

[0034] 2) The smelted wear-resistant alloy steel is tapped and sand casted;

[0035] 3) Heat treatment of casted ball mill liner: heat casted ball mill liner to 890°C, keep...

Embodiment 2

[0037] A ball mill liner, the ball mill liner comprises the following chemical components in weight percentage: C 0.60%, Si 0.80%, Mn 0.9%, P 0.03%, S 0.03%, Cr 3.0%, Mo 0.5%, Cu 0.3 %, Ni 0.6%, the rest is Fe and unavoidable impurities.

[0038] A method for manufacturing a liner for a ball mill, comprising the steps of:

[0039] 1) The smelting equipment adopts an electric arc furnace, and the above-mentioned raw materials except nickel are put into the electric arc furnace according to the weight percentage ratio for smelting. The nickel plate conveying device sends the nickel plate into the molten steel from the filling port of the electric arc furnace, and continuously stirs the molten steel through the nickel plate conveying device, so that the nickel plate is evenly dissolved in the molten steel;

[0040] 2) The smelted wear-resistant alloy steel is tapped and sand casted;

[0041] 3) Heat treatment of the casted ball mill liner: heat the casted ball mill liner to 910...

Embodiment 3

[0043] A ball mill liner, the ball mill liner comprises the following chemical composition in weight percentage: C 0.55%, Si 0.50%, Mn 0.6%, P 0.02%, S 0.02%, Cr 2.2%, Mo 0.5%, Cu 0.2 %, Ni 0.5%, the rest is Fe and unavoidable impurities.

[0044] A method for manufacturing a liner for a ball mill, comprising the steps of:

[0045] 1) The smelting equipment adopts an electric arc furnace, and the above-mentioned raw materials except nickel are put into the electric arc furnace according to the weight percentage ratio for smelting. The nickel plate conveying device sends the nickel plate into the molten steel from the filling port of the electric arc furnace, and continuously stirs the molten steel through the nickel plate conveying device, so that the nickel plate is evenly dissolved in the molten steel;

[0046] 2) The smelted wear-resistant alloy steel is tapped and sand casted;

[0047] 3) Heat treatment of the cast ball mill liner: heat the cast ball mill liner to 900°C,...

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PUM

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Abstract

A ball grinder lining plate comprises, by weight percent, 0.50%-0.60% of C, 0.40%-0.80% of Si, 0.5%-0.9% of Mn, smaller than 0.04% of P, smaller than 0.04% of S, 2.0%-3.0% of Cr, 0.2%-0.5% of Mo, not larger than 0.3% of Cu, 0.2%-0.6% of Ni and the balance Fe and inevitable impurities. Compared with the prior art, the ball grinder lining plate has the beneficial effects that a nickel element is added into raw material alloy steel, the critical cooling rate of the alloy steel is effectively reduced, the hardenability of a ball grinder lining plate material is improved, the martensite layer thickness of the lining plate is greatly increased, and therefore the service life of the lining plate is prolonged; and the martensitic structure content is further increased, the grain structure is refined, the material strength and toughness are improved, the cracking phenomenon in the heat treatment process is reduced, meanwhile, corrosion resistance is improved, and wear resistance is effectively improved.

Description

technical field [0001] The invention relates to the field of chromium-molybdenum-copper low-alloy steel production, in particular to a ball mill liner and a manufacturing method thereof. Background technique [0002] A steel company installed a new φ6.2×9m ball mill in a concentrator in 2014. It is currently the largest ball mill in the area. Compared with other mills, the lining plate on the inner wall is relatively larger in size. It is the increase of the thickness of the liner, which causes the quenching effect in the heat treatment process to be poor, and the core of the liner is not completely hardened, resulting in the service life of the liner not reaching the expected effect, and affecting the working efficiency of the ball mill. [0003] According to statistics, this type of ball mill used a total of 4 sets of ball mill liners from 2014 to early 2016, and the running time ranged from 1484 hours to 2077 hours, resulting in frequent replacement of ball mill liners, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/42C22C33/04C21D9/00B02C17/22
CPCB02C17/22C21D9/0081C22C33/04C22C38/02C22C38/04C22C38/42C22C38/44
Inventor 李欣茹张守成张瑞
Owner 鞍钢集团(鞍山)铁路运输设备制造有限公司