Mullite-shrunk glass complex phase material and preparation method thereof

Abstract

The invention relates to a mullite-silica-rich glass material (Mullica) and a preparation method thereof. The adopted technical proposal is as follows: firstly, 60 to 100 weight percent of fused corundum dusting powder and 0 to 40 weight percent of fine SiO2 powder are mixed, stirred, and then molded; and then the mixture is heated to between 1,300 and 1,600 DEG C at a temperature increase rate of between 2 and 5 DEG C / min in a reaction furnace under air atmosphere, the thermal insulation is performed for 2 to 8 hours, and then the mixture is naturally cooled. A raw material used by the mullite-silica-rich glass material is the fused corundum dusting powder, alumina and silica in the fused corundum dusting powder are utilized as compositions of synthetic mullite, and impurities such as potassium oxide can form a glass phase. The method uses waste as the raw material to synthesize the mullite-silica-rich glass material (Mullica), which can change wastes into valuables, reduce environmental pollution and production cost. At the same time, the mullite-silica-rich glass material (Mullica) does not contain cristobalite and corundum, and has the characteristics of high refractability, low expansion coefficient, wear resistance, and good thermal shock resistance.

Description

technical field [0001] The invention relates to the technical field of composite refractory production. In particular, it relates to a mullite-high silica glass composite material (Molacate) and a preparation method thereof. Background technique [0002] Fused corundum dust removal powder is a solid waste generated during the production of fused corundum. The chemical composition of fused corundum dust removal powder is mainly Al 2 o 3 , SiO 2 , K 2 O, MgO, Fe 2 o 3 , Na 2 Mainly O and CaO, etc., in general, Al 2 o 3 20~56wt%, SiO 2 10~50wt%, K 2 O is 0.3 to 20 wt%. The proportion of its chemical composition varies slightly with the raw materials and operating conditions of each manufacturer. [0003] Fused corundum dust removal powder is usually discarded as garbage, which not only pollutes the environment, but also requires a large amount of disposal sites and high processing costs. With the development of industrial processes, its production volume is also i...