Large-scale ball mill lining board and preparation method thereof

A ball mill liner and large-scale technology, which is applied in the field of wear-resistant materials, can solve the problems of ball mill liner with large amount of precious alloys, high production cost, poor wear resistance, etc., to facilitate large-scale mass production, simple production process, quenching good permeability

Inactive Publication Date: 2015-05-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned ball mill liner may have the disadvantages of high addition of precious alloy, high production cost, low hardness, poor wear resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The liner of the large ball mill of the present invention is smelted in a 1000 kg intermediate frequency induction furnace, and its manufacturing process steps are:

[0022] ① Firstly, scrap steel, recarburizer, ferrochromium, ferrochromium nitride, ferro-niobium, ferro-boron, ferromanganese and ferrosilicon are mixed and heated in a 1000 kg medium-frequency induction furnace and melted. When the temperature of molten steel reaches 1582°C, add aluminum for deoxidation. Adjust the chemical composition and mass fraction of molten steel in the furnace to 0.85%C, 1.82%Cr, 0.053%N, 0.13%Nb, 0.97%Mn, 0.28%Si, 0.007%B, 0.06%Al, 0.032%S, 0.046 %P, the balance is Fe and unavoidable trace impurity elements, and then when the temperature of the molten steel is raised to 1624 ° C, it is released into the ladle, and the bottom of the ladle is pre-added with titanium-iron particles wrapped with copper-magnesium alloy plates (titanium-iron particles The chemical composition and mass f...

Embodiment 2

[0025] The liner of the large ball mill of the present invention is smelted in a 1000 kg intermediate frequency induction furnace, and its manufacturing process steps are:

[0026] ① Firstly, scrap steel, recarburizer, ferrochrome, ferrochrome nitride, ferro-niobium, ferro-boron, ferro-manganese and ferrosilicon are mixed, heated and melted in a 1000 kg medium-frequency induction furnace. When the temperature of molten steel reaches 1599°C, add aluminum for deoxidation. Adjust the chemical composition and mass fraction of molten steel in the furnace to 0.71%C, 1.99%Cr, 0.088%N, 0.17%Nb, 0.62%Mn, 0.59%Si, 0.004%B, 0.08%Al, 0.031%S, 0.045 %P, the balance is Fe and unavoidable trace impurity elements, and then when the temperature of the molten steel is raised to 1647 ° C, it is released into the ladle, and the bottom of the ladle is pre-added with ferro-titanium particles wrapped with copper-magnesium alloy plates (ferro-titanium particles The chemical composition and mass fract...

Embodiment 3

[0029] The liner of the large ball mill of the present invention is smelted in a 1000 kg intermediate frequency induction furnace, and its manufacturing process steps are:

[0030]① Firstly, scrap steel, recarburizer, ferrochromium, ferrochrome nitride, ferro-niobium, ferro-boron, ferromanganese and ferrosilicon are mixed and heated in a 1000 kg medium-frequency induction furnace and melted. When the temperature of molten steel reaches 1594°C, aluminum is added for deoxidation. Adjust the chemical composition and mass fraction of molten steel in the furnace to 0.77%C, 1.92%Cr, 0.069%N, 0.16%Nb, 0.75%Mn, 0.40%Si, 0.006%B, 0.07%Al, 0.037%S, 0.044 %P, the balance is Fe and unavoidable trace impurity elements, and then when the temperature of the molten steel is raised to 1636 ° C, it is released into the ladle, and the bottom of the ladle is pre-added with ferro-titanium particles wrapped with copper-magnesium alloy plates (ferro-titanium particles The chemical composition and ma...

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Abstract

The invention discloses a large-scale ball mill lining board and a preparation method thereof, and belongs to the technical field of wear-resistant materials. The method comprises the following steps: firstly, mixing, heating and fusing steel scraps, a carburetant, ferrochrome, nitrided ferrochrome, ferroniobium, ferroboron, ferromanganese and ferrosilicon in an electric furnace; when the temperature of molten steel reaches 1580-1600 DEG C, adding aluminum, and deoxidizing; adjusting the chemical components of the molten steel in the furnace and the mass fractions of the chemical components to be 0.70%-0.85% of C, 1.8%-2.0% of Cr, 0.05%-0.09% of N, 0.12%-0.18% of Nb, 0.6%-1.0% of Mn, 0.25%-0.60% of Si, 0.004%-0.008% of B, 0.05%-0.08% of Al, less than 0.04% of S, less than 0.05% of P and the balance of Fe and inevitable race impurity elements; and carrying out microalloying treatment on the molten steel, casting a lining board, and carrying out thermal treatment on the lining board. The large-scale ball mill lining board has the characteristics of high hardness, good abrasive resistance and the like, and has a good effect on popularization and application.

Description

technical field [0001] The invention relates to various ball mill liners and a preparation method thereof, in particular to a large ball mill liner and a preparation method thereof, belonging to the technical field of wear-resistant materials. Background technique [0002] Ball mill is a widely used crushing machine, and it is one of the main equipments for crushing materials in metallurgical mines, cement building materials, electric power, chemical fertilizer, coal, chemical industry and other industries. In addition to the impact and wear of the grinding body (grinding ball, grinding rod and grinding section) and the material, it also has the effect of lifting the grinding body. With the rapid development of material grinding technology, the ball mill tends to be larger, and the working conditions of the lining board are increasingly harsh, which puts forward higher requirements on the performance of the lining board material. In order to improve the performance of the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C21D6/00B22D1/00B02C17/22
CPCY02P10/20
Inventor 魏世忠蒋志强蒋业华符寒光屈银虎冯锡兰符定梅
Owner BEIJING UNIV OF TECH
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