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A wear-resistant liner used in grinding operations to produce alumina

A technology for production and wear-resistant linings, applied in the field of wear-resistant linings, can solve problems such as short service life of steel linings, and achieve the effects of prolonging service life, increasing compatibility, and improving fracture toughness

Active Publication Date: 2019-04-12
平顶山京钰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the service life of the steel liner is short due to the impact force produced by the grinding body and ore on the liner of the mill, the invention provides a wear-resistant liner used in grinding operations to produce alumina. The liner is equipped with a wear-resistant rubber liner on the surface of the steel liner, so that the grinding body and ore directly impact on the wear-resistant rubber liner, which serves the purpose of protecting the steel liner, and the wear-resistant rubber liner is easy to replace after damage , greatly extending the service life of the steel liner

Method used

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  • A wear-resistant liner used in grinding operations to produce alumina

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preparation example Construction

[0042] Further, the preparation method of described composite epoxy resin comprises the following steps:

[0043] 1) Prepare modified nano-silica and modified silica sol respectively for later use;

[0044] The modified nano-silica is obtained by mixing commercially available nano-silica and a surface modifier of 3-5% by weight thereof, and the surface modifier is composed of KH550, ethanol, acetone and barium hydroxide in a weight ratio of 3-4 :80:2-3:1-2 ratio mixed;

[0045] The modified silica sol is obtained by sequentially adding 2-3% silica sol weight silica powder, 1-2% silica sol weight potassium hexatitanate whiskers and 0.8-1% silica sol weight acetic acid to commercially available silica sol. sodium, and then stirred the resulting mixture at 70-80°C for 1-2h;

[0046] 2) Weigh each component according to the stated ratio, then melt the novolac epoxy resin, add the weighed polybutadiene epoxy resin and diisocyanate to it, stir until it is completely melted, and th...

Embodiment 1

[0055] Such as figure 1 As shown, a wear-resistant liner used in grinding operations to produce alumina includes a steel liner 1 and a wear-resistant rubber liner 3 arranged on its inner wall surface, and the inner wall surface of the steel liner 1 is distributed There are several countersunk holes, so that when the wear-resistant rubber material is pressed on the inner wall surface of the wear-resistant rubber liner 3 to form the wear-resistant rubber liner 3, a part of the wear-resistant rubber material enters into the counterbore to form the connecting bolt 2, realizing the steel lining Plate 1 is connected with the wear-resistant rubber liner 3; according to the weight ratio, the wear-resistant rubber material consists of 180 parts of polyurethane rubber, 120 parts of natural rubber, 60 parts of nitrile rubber, 3 parts of vulcanizing agent, 30 parts additives, 14 parts of composite fiber and 25 parts of wear-resistant admixture, among which the additives are carbon black, ...

Embodiment 2

[0073] Such as figure 1 As shown, a wear-resistant liner used in grinding operations to produce alumina includes a steel liner 1 and a wear-resistant rubber liner 3 arranged on its inner wall surface, and the inner wall surface of the steel liner 1 is distributed There are several countersunk holes, so that when the wear-resistant rubber material is pressed on the inner wall surface of the wear-resistant rubber liner 3 to form the wear-resistant rubber liner 3, a part of the wear-resistant rubber material enters into the counterbore to form the connecting bolt 2, realizing the steel lining Plate 1 is connected with the wear-resistant rubber liner 3; according to the weight ratio, the wear-resistant rubber material consists of 220 parts of polyurethane rubber, 140 parts of natural rubber, 80 parts of nitrile rubber, 5 parts of vulcanizing agent, 40 parts additives, 18 parts of composite fibers and 30 parts of wear-resistant admixtures, among which the additives are carbon black...

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Abstract

An abrasion-resisting lining plate for producing aluminum oxide in ore grinding operation comprises a steel lining plate and an abrasion-resisting rubber lining plate arranged on the inner wall face of the steel lining plate. A plurality of counter bores are distributed in the inner wall face of the steel lining plate so that when abrasion-resisting rubber materials is pressed into the abrasion-resisting rubber lining plate on the inner wall face of the abrasion-resisting rubber lining plate, part of abrasion-resisting rubber materials enter the counter bores to form connection bolt columns toachieve connection between the steel lining plate and the abrasion-resisting rubber lining plate. According to the abrasion-resisting lining plate, due to the fact that the abrasion-resisting rubberlining plate is arranged on the surface of the steel lining plate, the abrasion-resisting rubber lining plate plays a role in protecting the steel lining plate when a grinding body and ores directly impact the abrasion-resisting rubber lining plate, the abrasion-resisting rubber lining plate is easy to change after being damaged, and the service life of the steel lining plate is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of extracting alumina from bauxite, in particular to a wear-resistant liner used for grinding to produce alumina. Background technique [0002] The bauxite in my country is mainly diaspore, and the bauxite of boehmite and gibbsite is less, so the main object of alumina grinding operation is diaspore (Mohs hardness is 6.5-7). At present, domestic alumina grinding mostly adopts two-stage wet overflow grinding operation, the first stage is rod mill, and the second stage is ball mill. No matter whether it is rod mill or ball mill, the mill liner is required. [0003] Due to the high impact toughness of high manganese steel, good work hardening ability under strong impact, and good corrosion resistance, high manganese steel liners are still commonly used in most alumina grinding in China. During the alumina grinding process, the mill liner is basically affected by three forces: the first is the impact force of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/22C08L75/08C08L7/00C08L9/02C08L67/02C08K13/06C08K9/06C08K3/34C08K7/06C08K7/14C08K5/12
CPCB02C17/225C08L75/08C08L2205/025C08L2205/035C08L2205/16C08L7/00C08L9/02C08L67/02C08K13/06C08K9/06C08K3/346C08K7/06C08K7/14C08K5/12
Inventor 王畅杜刚刚肖敏宋鹏远高明帅
Owner 平顶山京钰实业有限公司
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