Unfired ferro silicon nitride-alumina composite carbon-free sliding plate and preparation method thereof
A technology of ferrosilicon nitride and alumina, applied in the field of refractory materials, can solve the problems of reducing production cost, poor oxidation resistance, polluting molten steel, etc. The effect of shock performance
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Embodiment 1
[0024] Example 1: A method for preparing a non-fired ferrosilicon nitride-alumina composite carbon-free slide plate. In terms of weight percentage, the raw material composition is: 75% corundum, 5% activated alumina, and 10% silicon nitride Iron, plus 3.5% thermosetting phenolic resin.
[0025] During production, first weigh various raw materials according to the proportion, mix them evenly, and get the mud material through mixing, and then press it into shape with a friction press, and dry it at 120-600°C for 9 hours; Make the product of the present invention.
[0026] The powder is ferrosilicon nitride with a particle size of less than 325 mesh, activated alumina and part of corundum, and the aggregate is corundum with a particle size of 3-1mm or 1-0.1mm; the above-mentioned corundum is divided into tabular corundum and white corundum.
[0027] The performance index of the obtained product is: apparent porosity 4.2%, bulk density 3.29g / cm 3 , normal temperature compressive...
Embodiment 2
[0028] Embodiment 2: production technology is identical with embodiment 1, and difference is:
[0029] In terms of weight percentage, the raw material composition is: 71% corundum, 4% activated alumina, 15% ferrosilicon nitride, and 3.5% thermosetting phenolic resin. The performance index of the obtained product is: apparent porosity 5.5%, bulk density 3.18g / cm 3 , The compressive strength at room temperature is 175MPa, and the flexural strength at high temperature is 20MPa. Its thermal shock resistance, corrosion resistance, oxidation resistance and hydration resistance are all good.
Embodiment 3
[0030] Embodiment 3: production process is identical with embodiment 1, and difference is:
[0031] In terms of weight percentage, the raw material composition is: 66% of corundum, 4% of activated alumina, 20% of ferrosilicon nitride, and 3.5% of thermosetting phenolic resin. The performance index of the obtained product is: apparent porosity 6.7%, bulk density 3.12 / cm 3 , The compressive strength at room temperature is 153MPa, and the flexural strength at high temperature is 33MPa. Its thermal shock resistance, erosion resistance, oxidation resistance and hydration resistance are all good.
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