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A platform for research: civil engineering, architecture and urbanism
Unfired Al2O3-Cr7C3 brick for hot metal ladle wall and preparation method thereof
The invention discloses an unfired Al2O3-Cr7C3 brick for a hot metal ladle wall and a preparation method thereof. The unfired Al2O3-Cr7C3 brick comprises aggregate and substrate materials, wherein the aggregate is prepared from, by weight, 55%-60% of ferrochrome slag particles, and the substrate materials are prepared from, by weight, 6%-8% of ferrochrome slag fine powder, 1%-3% of rho-Al2O3 fine powder and 32%-37% of Cr7C3 fine powder. The preparation method comprises the steps that according to the raw materials and the contents thereof, the substrate materials are mixed firstly, and the mixed substrate materials are added to the aggregate to be mixed for 5-8 min; thermosetting phenolic resin accounting for 4%-6% by weight of the raw materials and silica sol accounting for 1%-4% by weight of the raw materials are additionally added, mixing is conducted for 10-15 min, and mechanical pressing is conducted; maintenance is conducted for 10-12 h on the condition that the temperature ranges from 30 DEG C to 35 DEG C, heat preservation is conducted for 12-24 h on the condition that the temperature ranges from 200 DEG C to 220 DEG C, and the unfired Al2O3-Cr7C3 brick for the hot metal ladle wall is prepared. The unfired Al2O3-Cr7C3 brick for the hot metal ladle wall and the preparation method thereof have the advantages of being low in production cost and simple in technology, and the prepared unfired Al2O3-Cr7C3 brick for the hot metal ladle wall is high in density, strong in slag erosion resistance and good in heat-shock stability.
Unfired Al2O3-Cr7C3 brick for hot metal ladle wall and preparation method thereof
The invention discloses an unfired Al2O3-Cr7C3 brick for a hot metal ladle wall and a preparation method thereof. The unfired Al2O3-Cr7C3 brick comprises aggregate and substrate materials, wherein the aggregate is prepared from, by weight, 55%-60% of ferrochrome slag particles, and the substrate materials are prepared from, by weight, 6%-8% of ferrochrome slag fine powder, 1%-3% of rho-Al2O3 fine powder and 32%-37% of Cr7C3 fine powder. The preparation method comprises the steps that according to the raw materials and the contents thereof, the substrate materials are mixed firstly, and the mixed substrate materials are added to the aggregate to be mixed for 5-8 min; thermosetting phenolic resin accounting for 4%-6% by weight of the raw materials and silica sol accounting for 1%-4% by weight of the raw materials are additionally added, mixing is conducted for 10-15 min, and mechanical pressing is conducted; maintenance is conducted for 10-12 h on the condition that the temperature ranges from 30 DEG C to 35 DEG C, heat preservation is conducted for 12-24 h on the condition that the temperature ranges from 200 DEG C to 220 DEG C, and the unfired Al2O3-Cr7C3 brick for the hot metal ladle wall is prepared. The unfired Al2O3-Cr7C3 brick for the hot metal ladle wall and the preparation method thereof have the advantages of being low in production cost and simple in technology, and the prepared unfired Al2O3-Cr7C3 brick for the hot metal ladle wall is high in density, strong in slag erosion resistance and good in heat-shock stability.
Unfired Al2O3-Cr7C3 brick for hot metal ladle wall and preparation method thereof
ZHANG HAN (author) / GAO HONGJUN (author) / ZHAO HUIZHONG (author) / SONG JIANYI (author) / CAO KUN (author) / CAO YANG (author) / CAO ZHIMING (author) / KOU ZHIYUAN (author)
2016-01-27
Patent
Electronic Resource
English
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