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

A preheater and cement kiln technology, which is applied in the field of recrystallized silicon carbide hanging board for the inner cylinder of the cement kiln preheater and its preparation, can solve the problem that the wear resistance and corrosion resistance are not ideal, the composition ratio is not well controlled, and the production raw materials are complicated. and other problems, to achieve the effect of low cost, simple manufacturing process and long service life

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, its production raw materials are relatively complicated, the proportion of ingredients is not easy to control, and its wear resistance and corrosion resistance are still not ideal, the product strength is not enough, and it is easy to damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put silicon carbide powder with a purity greater than 99% into a ball mill, and its particle size distribution is 40% of 1.6mm-0.6mm micropowder, 25% of 0.6mm-0.1mm micropowder, 10% of 100μm-5μm micropowder, 25% of 5μm-1μm micropowder; then Add 10% water and 1% sodium hydroxide of the total weight of silicon carbide powder to adjust the pH value to ≥6.5, then add 1% sodium carboxymethylcellulose and 0.2% sodium lignosulfonate; start the ball mill to wet grind 2 -10 hours, make the mud, put the made mud into the storage tank for ultrasonic and vacuum treatment to remove air bubbles; inject the treated mud into the plaster mold, solidify and then demould; send the demoulded green body to Drying in a drying kiln, the temperature of the drying kiln is greater than 100 degrees, and the drying time is greater than 20 hours; the dried green body is placed in a vacuum induction furnace, the furnace door is closed, vacuumed, argon is injected, and the sintering temperature is 18...

Embodiment 2

[0031] Put silicon carbide powder with a purity greater than 99% into a ball mill, and its particle size distribution is 15% of 60μm-40μm micropowder, 25% of 40μm-20μm micropowder, 20% of 20μm-10μm micropowder, 15% of 10-5μm micropowder, 25% of 5μm-1μm micropowder %; then add 15% of the total weight of silicon carbide powder, water and 2% of sodium carbonate, adjust the pH value ≥ 6.5, then add 4% of sodium polyacrylate and 0.1% of sodium hexametaphosphate; start the ball mill to wet mill 2-10 Hours, make mud, and then ultrasonic and vacuum treatment on the mud to remove air bubbles; inject the treated mud into the gypsum mold, solidify and mold and demould; send the demoulded biscuit to the drying kiln for drying, and the drying kiln The temperature is greater than 100 degrees, and the drying time is greater than 20 hours; the dried biscuit is placed in a vacuum induction furnace, the furnace door is closed, vacuumed, argon is injected, and sintered. The sintering temperature ...

Embodiment 3

[0033] Take silicon carbide powder with a purity greater than 99% and put it into a ball mill, and its particle size distribution is 10% of 10μm-5μm micropowder, 30% of 5μm-1μm micropowder, 60% of 1μm-0.5μm micropowder; then add 20% of the total weight of silicon carbide powder in water and 1% sodium hydroxide, adjust the pH value to ≥ 6.5, then add 2% sodium carboxymethyl cellulose and 0.1% sodium tripolyphosphate; start the ball mill for wet grinding for 2-10 hours to make mud, and then make mud Carry out ultrasonic and vacuum treatment to remove air bubbles; inject the treated mud into the plaster mold, and demould after solidification; send the demoulded biscuit to the drying kiln for drying, the temperature of the drying kiln is greater than 100 degrees, and the drying time More than 20 hours; put the dried biscuit into the vacuum induction furnace, close the furnace door, vacuumize, inject argon, and sinter. MPa, after sintering, it is made into recrystallized silicon ca...

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Abstract

The invention discloses a recrystallized carborundum link plate used for a preheater inner barrel of a cement kiln. Materials for preparing the link plate consist of carborundum powder and additional water, diluter, surfactant and dispersant agent, wherein the carborundum powder has different grain size grades within a range of 1.6mm to 0.5mum, with a purity of higher than 99 percent; the ratios of dosage of the water, the diluter, the surfactant and the dispersant agent to the total weight of the carborundum powder respectively are 10-30 percent, 1-2 percent, 1-6 percent and 0.1-2 percent. The invention has the advantages of simple manufacturing technique, easiness for production and manufacturing, simple production raw materials and low cost. The recrystallized carborundum link plate manufactured has high strength, good high-temperature resistance, wear-resistance and corrosion-resistance 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 recrystallized 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, its production raw materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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