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 plate and preparation for the inner cylinder of the cement kiln preheater, can solve the problem of unsatisfactory wear resistance and corrosion resistance, poor control of composition ratio, and complicated production raw materials and other problems, to achieve the effect of low cost, simple manufacturing process and long service life
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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 ≥ 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 green body into the vacuum induction furnace, close the furnace door, evacuate, inject argon, and sinter. MPa, after sintering, it is made into recrystallized silicon car...
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