Method for machining shell liner of shell in semi-autogenous mill

A technology of semi-autogenous grinding machine and processing method, which is applied in the direction of metal processing equipment, manufacturing tools, furnace types, etc., and can solve the problems that affect the civilized production of modern enterprises, the lifting strip of the cylinder liner is weak, and cannot meet the time use requirements, etc. , to achieve the effect of optimizing the heat treatment process, improving the overall strength and hardness, good toughness and work hardening ability

Active Publication Date: 2014-01-22
JIANGSU XINGYUAN POWER PLANT & METALLURGICAL EQUIP MFG
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] 1. Chromium-molybdenum alloy is generally used for domestic semi-autogenous mill cylinder liners, which cannot meet the time requirements of the site, and the service life is about 3 months
[0005] 2. The lifting strip in the middle of the cylinder liner is weak and the strength is not enough, which will easily cause the cyli

Method used

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  • Method for machining shell liner of shell in semi-autogenous mill
  • Method for machining shell liner of shell in semi-autogenous mill
  • Method for machining shell liner of shell in semi-autogenous mill

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[0027] The present invention will be further explained below in conjunction with the drawings;

[0028] The cylinder liner in the semi-automatic mill includes a lower part of a lifting bar 1, a lifting bar 2, and an upper part 3 of the lifting bar. The feature is that the lifting bar 2 is arranged in the center of the cylinder liner 6, and the upper part 3 of the lifting bar is set at a right angle. To facilitate lifting of the steel ball, the lower part 1 of the lifting bar is set at an obtuse angle, and reinforcing ribs 4 are symmetrically and uniformly arranged on the upper part 3 of the lifting bar and the lower part 1 of the lifting bar, and lifting holes 5 are provided on the ribs of the reinforcing rib 4.

[0029] The processing method of the cylinder liner in the semi-automatic mill is characterized by: adopting ultra-high manganese alloy steel; the elements of the formula are in weight percentage, carbon: 1.0~1.4, manganese: 17~19, phosphorus: <0.05, Silicon: 0.3~1.0, S:...

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Abstract

The invention discloses a method for machining a shell liner of a shell in a semi-autogenous mill. A lifting strip is arranged in the center of the shell liner, the upper portion of the lifting strip is arranged to be a right angle, the lower portion of the lifting strip is arranged to be an obtuse angle, reinforcing ribs and lifting holes are symmetrically and evenly distributed in the two sides of the lifting strip, the shell liner is made of ultrahigh manganese steel alloy, according to the formula, the alloy comprises, by weight, 1.0-1.4% of carbon, 17-19% of manganese, less than 0.05% of phosphorus, 0.3-1.0% of silicon, less than 0.05% of sulphur, less than 0.2% of aluminum, less than 0.5% of vanadium, 1.5-2.5% of chrome, less than or equal to 1.5% of nickel, less than or equal to 0.5-1% of copper, 0.3-1.0% of molybdenum, a micro amount of bohemium, and the balance iron. According to the method, the material formula is changed, the structure of the shell liner is designed, the thermal treatment process is optimized, the whole intensity and hardness of the shell liner are improved, and the mechanical performance of the equipment is met. The labor intensity is reduced, the service life of the equipment is prolonged by at least more than six months, and the economic benefits are improved.

Description

technical field [0001] The invention relates to a semi-autogenous mill, in particular to a processing method for a cylinder liner in a semi-autogenous mill. Background technique [0002] The semi-autogenous mill is the main crushing and grinding equipment in the production of thermal power, mining, chemical industry, metallurgy and other industries at home and abroad, and the cylinder liner and grinding ball are the main working parts in the normal operation of the semi-autogenous mill. Its working principle: The ore rotates with the cylinder, the position is raised rapidly, and it quickly changes from the state of compression to the state of tension. When the gravity of the ore overcomes the centrifugal force, the ore will fall away from the cylinder, but the falling paths of ores of various particle sizes are different. Due to the strong gravity, the upper body first slides down when the upper body reaches a lower height, and at the same time produces impact and grindin...

Claims

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Application Information

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IPC IPC(8): B23P15/00C22C38/58B22C9/02C21D9/00C21D1/18B02C17/22
CPCB02C17/22B22C9/02C21D1/18C21D9/0081C22C38/02C22C38/22C22C38/38C22C38/44C22C38/58C22C38/60
Inventor 朱华平赵飞文
Owner JIANGSU XINGYUAN POWER PLANT & METALLURGICAL EQUIP MFG
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