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Reactive sintering carborundum link plate used for preheater inner barrel of cement kiln and preparation method thereof

A technology of sintered silicon carbide and preheater, which is applied in the field of hanging boards, can solve the problems that the inner cylinder of cement kiln preheater cannot be used, the wear resistance and corrosion resistance are not ideal, and the product strength is not enough, etc., and it is easy to popularize and use, Conducive to industrialized production and high product strength

Active Publication Date: 2009-10-28
洛阳鹏飞耐磨材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing ceramic hanging boards are not ideal in wear resistance and corrosion resistance, and the product is not strong enough and easily damaged, which still cannot meet the needs of the inner cylinder of the cement kiln preheater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 66 parts of silicon carbide with a purity greater than 98%, 10 parts of carbon black with a carbon content greater than 99% and a particle size of 100nm, and 24 parts of silicon powder with a purity greater than 98% and a particle size of 44 μm, including 20 parts of silicon carbide with a particle size of 60-40 μm and a particle size of 20 parts of silicon carbide with a particle size of 40-20 μm, 10 parts with a particle size of 20-10 μm, and 16 parts with a particle size of 10-5 μm; put the raw materials into a ball mill, and then add water with a total weight of 12% of silicon carbide, carbon black and silicon powder, and 2% binder and 0.1-2% dispersant; open ball mill wet grinding for 3 hours, make the raw material into mud, put the prepared mud into the storage tank, carry out ultrasonic and vacuum treatment, remove air bubbles, slowly put the treated mud Inject into the pre-assembled mold, demould after being solidified and formed, and put the stripped green ...

Embodiment 2

[0039] Take 78 parts of silicon carbide with a purity greater than 98%, 10 parts of thermoplastic phenolic resin powder with a particle size of 88 μm, and 12 parts of silicon powder with a purity greater than 98% and a particle size of 44 μm, including 20 parts of silicon carbide with a particle size of 60-40 μm and 40-20 μm 20 parts of silicon carbide, 10 parts of particle size 20-10 μm, 28 parts of particle size 10-5 μm; put the raw materials into a ball mill, then add silicon carbide, thermoplastic phenolic resin powder and silicon powder with 15% water and 2% urethane Lotropine, 1% binder and 0.1-2% dispersant; open ball mill for 5 hours to make the raw material into slurry, then ultrasonic and vacuum treatment the slurry to remove air bubbles, slowly inject the treated slurry into the In the assembled mold, demould after being solidified and formed, and the stripped green body is dried in a dryer at a temperature of 100°C for more than 20 hours; the dried green body is pla...

Embodiment 3

[0041] Take 66 parts of silicon carbide with a purity greater than 98%, 10 parts of carbon black with a carbon content greater than 99% and a particle size of 100nm, and 24 parts of silicon powder with a purity greater than 98% and a particle size of 44 μm, including 40 parts of silicon carbide with a particle size of 10-5 μm and a particle size of 26 parts of 5-1μm silicon carbide; put the raw materials into a ball mill, then add 18% water, 2% binder and 0.1-2% dispersant of the total weight of silicon carbide, carbon black and silicon powder; open ball mill for wet grinding After 4 hours, the raw materials were made into slurry, and then the slurry was subjected to ultrasonic and vacuum treatment to remove air bubbles, and the treated slurry was slowly injected into the pre-assembled mold. Drying, the drying temperature is 100°C, and the time is more than 20 hours; put the dried biscuit into an induction furnace or a resistance furnace, close the furnace door, vacuumize, inje...

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Abstract

The invention discloses a reactive sintering carborundum link plate used for a preheater inner barrel of a cement kiln. Materials for preparing the link plate consist of carborundum, carbon materials and silica powder as well as additional water, curing agent, bonding agent and dispersant agent, wherein the portions by weight and the addition ratio of the carborundum, the carbon materials and the silica powder are as follows: 66-83 portions of carborundum, 5-10 portions of carbon materials and 10-24 portions of silica powder; the ratios of dosage of water, bonding agent and dispersant agent to the total weight of carborundum, carbon materials and silica powder are as follows: 10-30 percent of water, 1-3 percent of bonding agent and 0.1-2 percent of dispersant agent; and the carborundum has different grain size grades and the grain size thereof distributes in two or more grain size sections of 60-40mum, 40-20mum, 20-10mum, 10-5mum and 5-1mum. In the invention, raw materials selected are reasonable in composition and have large bulk density, and the products have high strength, good wear-resistant property, low cost and long service life.

Description

technical field [0001] The invention relates to a hanging board for the inner cylinder of a cement kiln preheater, in particular to a reaction-sintered silicon carbide hanging board for the inner cylinder of a cement kiln preheater and a preparation method thereof. Background technique [0002] At present, most of the hanging plates in the cement kiln preheater are heat-resistant and wear-resistant special alloy steel plates, which are used in high-temperature environments containing a large amount of corrosive powder, and their service life is very short, and because the price of such steel plates is very high, It greatly increases the production cost of the enterprise, which is not conducive to the long-term development of the enterprise. Although some ceramic siding boards for cement kiln preheaters have also appeared, the service life of the siding boards has been extended to a certain extent, and the production cost has been reduced. However, the wear resistance and co...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/565C04B35/622C04B7/43
Inventor 贾剑光
Owner 洛阳鹏飞耐磨材料股份有限公司
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