High-stability low-cost preparation process of artificially synthesized mullite

Abstract

The invention discloses a high-stability and low-cost preparation process of artificially synthesized mullite, and belongs to the technical field of mullites.The high-stability and low-cost preparation process of the artificially synthesized mullite comprises the following steps that 1, raw materials including a raw material A, a raw material B and a raw material C are prepared in advance, and all the raw materials are preliminarily crushed, screened and air-dried; step 2, proportioning and mixing the ferric oxide and the aluminum elementary substance in the raw material A, adjusting the proportion of aluminum oxide in the high bauxite and the kaolin in the raw material B, and drying and crushing. According to the present invention, by combining the aluminothermic reaction generated by the aluminum elementary substance and the iron oxide, the preliminary hot melting of a variety of raw materials can be achieved, and in the subsequent furnace kiln sintering process, the heating energy consumption ratio is saved, the mullite production energy consumption ratio can be reduced, the generation of a large amount of waste gas is not generated, and the actual environmental protection performance is high; the proportion of aluminum oxide is matched by utilizing multiple raw materials.

Description

technical field [0001] The invention relates to the technical field of mullite, in particular to a high-stability and low-cost preparation process for artificially synthesized mullite. Background technique [0002] Mullite refers to a series of minerals composed of aluminosilicates. It is worth mentioning that the SiO2-Al2O3 system is the most important binary system in ceramics. The first mullite phase diagram was published in 1909. , published a dozen different phase diagrams one after another. The focus of the debate is whether the mesophase mullite is a stable compound or an unstable compound. Later, the problem was unified. The composition of mullite is not fixed, and its alumina content It fluctuates between 72% and 78%. [0003] Existing mullite production often requires high-purity electric melting, ordinary electric melting, all-natural sintering and light burning. In the actual production process, a large amount of waste gas and waste will be generated, and the ac...

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Problems solved by technology

[0003] The existing production of mullite often requires the use of high-purity electric melting, ordinary electric melting, all-natural sintering and light burning. In the actual production process, a large amount of waste gas and discards will be generated, and the actual environmental protection effect is not good. And in the follow-up recording process, it was found that the production cost was high, mainly focused on the high energy consumption in the heating stage, which took a lot of time and wasted in the initial heating of raw materials, and the quality of finished products was also unstable

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