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Light-weight corundum refractory aggregate and preparation method thereof
The invention relates to a light-weight corundum refractory aggregate and a preparation method thereof. The preparation method comprises the following steps: using 40wt% to 60wt% of gamma-Al2O3 fine powder, 30wt% to 50wt% of alpha-Al2O3 micro powder, 1wt% to 5wt% of Al(OH)3 micro powder, 1wt% to 5wt% of nanometer aluminum oxide micro powder, 1wt% to 10wt% of saccharides polymer and 0.1wt% to 5wt% of antifreeze proteins as raw materials, adding 20wt% to 70wt% of water according to the raw materials additionally, and using a planetary ball mill for wet milling for 0.5-3 hours; putting slurry after wet milling in a mold, freezing for 6-24 hours under the condition of -30 to -90 DEG C, and demolding; then drying 12-36 hours under the condition of 110-200 DEG C, and preserving the temperature for 3-6 hours under the condition of 300-800 DEG C; and finally aluminizing so that the plating thickness is 0.1-0.5 mm, preserving the temperature for 3-6 hours under the condition of 500-900, sintering for 1-5 hours under the condition of 1600-1900 DEG C, and thus obtaining the light-weight corundum refractory aggregate. The light-weight corundum refractory aggregate prepared by the invention has the characteristics of small volume density, high closed porosity and high slag corrosion resistance.
Light-weight corundum refractory aggregate and preparation method thereof
The invention relates to a light-weight corundum refractory aggregate and a preparation method thereof. The preparation method comprises the following steps: using 40wt% to 60wt% of gamma-Al2O3 fine powder, 30wt% to 50wt% of alpha-Al2O3 micro powder, 1wt% to 5wt% of Al(OH)3 micro powder, 1wt% to 5wt% of nanometer aluminum oxide micro powder, 1wt% to 10wt% of saccharides polymer and 0.1wt% to 5wt% of antifreeze proteins as raw materials, adding 20wt% to 70wt% of water according to the raw materials additionally, and using a planetary ball mill for wet milling for 0.5-3 hours; putting slurry after wet milling in a mold, freezing for 6-24 hours under the condition of -30 to -90 DEG C, and demolding; then drying 12-36 hours under the condition of 110-200 DEG C, and preserving the temperature for 3-6 hours under the condition of 300-800 DEG C; and finally aluminizing so that the plating thickness is 0.1-0.5 mm, preserving the temperature for 3-6 hours under the condition of 500-900, sintering for 1-5 hours under the condition of 1600-1900 DEG C, and thus obtaining the light-weight corundum refractory aggregate. The light-weight corundum refractory aggregate prepared by the invention has the characteristics of small volume density, high closed porosity and high slag corrosion resistance.
Light-weight corundum refractory aggregate and preparation method thereof
HUANG AO (author) / GU HUAZHI (author) / FU LYUPING (author) / ZHANG MEIJIE (author)
2015-11-18
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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