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Ceramic composite grinding roller of medium speed coal grinding mill

A ceramic composite, coal mill technology, applied in the field of coal mill grinding rollers, can solve the problems of inconvenience of normal production, short service cycle, reduced production efficiency, etc. Effect

Inactive Publication Date: 2011-08-17
NANTONG GAOXIN ANTIWEAR MATERIALS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the grinding rollers of domestic medium-speed coal mills are cast with high-chromium cast iron, or directly surfacing high-chromium alloys on the surface of the machine parts to achieve the purpose of prolonging the wear-resistant life of parts, but due to the harsh production conditions , the surface of the grinding roller is subjected to high extrusion force and shear force when it is working. If its operating life is generally 8000-12000 hours, it must be replaced or repaired after running wear and tear, but the service cycle is short, which will bring problems to normal production. Great inconvenience, greatly reducing production efficiency

Method used

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  • Ceramic composite grinding roller of medium speed coal grinding mill
  • Ceramic composite grinding roller of medium speed coal grinding mill
  • Ceramic composite grinding roller of medium speed coal grinding mill

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Embodiment Construction

[0011] A ceramic composite grinding roller for a medium-speed coal mill, including an arc-shaped liner 1 cast from a high-chromium alloy. The arc-shaped liner is provided with a through hole, and the shape of the through hole can be cylindrical, prismatic, or conical. etc., the oxide, carbide or nitride ceramic rod 5 is embedded with a binder in the through hole, the arc-shaped liner and the ceramic rod form a metal-ceramic composite plate, and the metal-ceramic composite plate and the roller core 6 pass through the binder 4 Bonding, and directly fasten the roller core with the bolt 3 coated with thread adhesive through the through hole on the arc liner, and the ceramic cover 2 is embedded above the bolt.

[0012] There is an adhesive layer between the metal-ceramic composite arc liner and the roller core, and is fixed on the roller core by bolts, and the roller core is made of carbon cast steel.

[0013] At manufacture time:

[0014] (1) Install the ceramic rod inside the th...

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Abstract

The invention discloses a ceramic composite grinding roller of a medium speed coal grinding mill, which comprises an arc-shaped lining board formed by casting high-chromium alloy, wherein the arc-shaped lining board is provided with a through hole inside which oxide, nitride or carbide ceramic rod is embedded via adhesive, the arc-shaped lining board and the ceramic rod form a metal ceramic composite plate, the metal ceramic composite plate is adhesively connected with a roller core via the adhesive, the metal ceramic composite plate is provided with a bolt through hole, the bolt through hole is internally provided with a bolt which is directly fastened with the roller core and coated with threaded adhesive, and a ceramic cover is inlaid above the head of the bolt. The ceramic composite grinding roller is reasonable in structure and outstanding in shear resistance, extrusion resistance and abrasive resistance.

Description

technical field [0001] The invention relates to a grinding roller of a coal mill. Background technique [0002] At present, the grinding rollers of domestic medium-speed coal mills are cast with high-chromium cast iron, or directly surfacing high-chromium alloys on the surface of the machine parts to achieve the purpose of prolonging the wear-resistant life of parts, but due to the harsh production conditions , the surface of the grinding roller is subjected to high extrusion force and shear force when it is working. If its operating life is generally 8000-12000 hours, it must be replaced or repaired after running wear and tear, but the service cycle is short, which will bring problems to normal production. Great inconvenience, greatly reduces production efficiency. Contents of the invention [0003] The object of the present invention is to provide a coal mill grinding roller with a metal-ceramic composite that has reasonable structure, good shear resistance, extrusion r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C4/30
Inventor 钱兵花荣春
Owner NANTONG GAOXIN ANTIWEAR MATERIALS TECH CO LTD
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