Titanium calcium aluminate-silicon carbide complex phase refractory material and preparation method thereof

Abstract

The invention relates to a titanium calcium aluminate-silicon carbide complex phase refractory material and a preparation method thereof. The preparation method is characterized by taking 18 to 23 weight percent of alpha-Al2O3 powder, 5 to 10 weight percent of silicon micropowder and 1 to 3 weight percent of vanadium pentoxide are used as a first raw material; 55 to 60 weight percent of titanium calcium aluminate particles, 5 to 10 weight percent of silicon carbide particles and 4 to 6 weight percent of silicon carbide fine powder are used as a second raw material; the first raw material and the second raw material form raw materials; the second raw material, the first raw material subjected to ball grinding and an aluminum dihydrogen phosphate solution accounting for 3 to 4 weight percentof raw materials are subjected to mixing rolling, formation and drying; then, a dried blank body is put into an aluminum oxide sagger paved with crystalline flake graphite at the bottom; the crystalline flake graphite is used for filling and burying; heat insulation is performed for 3 to 4h under the condition of 1400 to 1450 DEG C; cooling is performed along with a furnace; the titanium calciumaluminate-silicon carbide complex phase refractory material is prepared. The characteristics of resource comprehensive utilization, energy saving and environment protection are realized; the preparedproduct has the advantages of high rupture strength, high compressive strength, low heat conductivity coefficient, excellent thermal shock resistant performance and good alkaline gas erosion resistantperformance.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. Specifically relates to a calcium aluminate-silicon carbide composite refractory material and a preparation method thereof. Background technique [0002] Calcium aluminate titanate is a kind of calcium aluminate slag produced after smelting ferro-titanium alloy through iron removal, silicon reduction, homogenization and melting. 6 and Ca((Al 0.84 Ti 0.16 ) 2 ) 6 o 19 The multiphase refractory material with the main crystal phase, and during the heating process, Ca((Al 0.84 Ti 0.16 ) 2 ) 6 o 19 will be transformed into a CA 6 . In addition, the refractory materials used in the transition zone of cement rotary kiln are easily corroded by components such as alkali, chlorine and sulfur in the fuel during the service process, resulting in damage to the kiln lining. Although the mullite-silicon carbide composite refractory material used in the transition zone has good thermal ...

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Problems solved by technology

In addition, the refractory materials used in the transition zone of cement rotary kiln are easily corroded by components such as alkali, chlorine and sulfur in the fuel during the service process, resulting in damage to the kiln lining

Although the mullite-silicon carbide composite refractory material used in the transition zone has good thermal shock resistance, the thermal conductivity of the material is large and it is difficult to form a stable kiln skin during service, resulting in large heat loss, and alkali Erosion is also more serious

[0003] "High wear-resistant silica molybdenum brick and its preparation process" (CN103833387A) patent technology, using bauxite clinker, silicon carbide fine powder, fused white corundum powder, andalusite powder, etc. as raw materials to prepare high wear-resistant silica molybdenum bricks, although The material has high wear resistance and excellent thermal shock resistance, but it has not been optimized for the corrosion resistance of the material against alkaline gas, resulting in the material being easily damaged by the erosion of alkaline gas; "High-strength dense silicon molybdenum brick and its manufacturing method" (CN101492301A) patented technology, using high alumina bauxite clinker, silicon oxide powder, silicon carbide, α-Al 2 o 3 etc. are used as raw materials to prepare high-strength and dense silica bricks. Although the material has high compressive strength, the proportion of dense high-alumina bauxite aggregate in the material is relatively high, which improves the thermal conductivity of the material and does not solve the problem of alkali resistance. The problem of poor gas erosion performance