A kind of ceramic slurry for grouting with high firing rate and preparation method thereof

Abstract

The invention relates to the technical field of grouting ceramics, and discloses a ceramic slurry for grouting with a high firing rate, which solves the problem that the dehydration rate of different parts of the existing slurry is different after being injected into a complex mold, resulting in uneven distribution of the body structure. The firing process is prone to cracks or even direct cracking, which includes the following raw materials mixed in parts by mass: 5-8 parts of quartz, 5-8 parts of waste porcelain powder, 5-8 parts of kaolin, 32-35 parts of ball clay, 30~35 parts of calcined coke gems, 6~8 parts of silicon carbide, 20~30 parts of alumina mixed chromium oxide powder, the molar ratio of alumina and chromium oxide in the alumina mixed chromia powder is 0.9~1.1, water 35~42 parts, when the green body obtained by grouting is sintered, the alumina mixed with chromium oxide powder is first melted to form a miscible eutectic fluid in the gap of the green body under the action of stress, and then the stress concentration phenomenon is weakened and the The firing rate of the finished product is also disclosed, and the preparation method of the mud is also disclosed, so as to improve the firing rate of the finished product.

Description

technical field [0001] The invention relates to the technical field of grouting ceramics, in particular to a high-firing ceramic slurry for grouting and a preparation method thereof. Background technique [0002] At present, the grouting method is also called the ceramic grouting molding method. The grouting method is a molding method in which the slurry is poured into a plaster mold to make it into a product. Therefore, the water in the part of the mud near the inner wall of the model is sucked by the porous gypsum to form a mud layer with the same shape as the inner wall of the model on the inner wall of the Shifen mold. This mud layer thickens with time. After stopping for a period of time, dump the excess mud, and the mud layer close to the inner wall of the Shifen model remains in the model; after a period of time, the mud layer naturally shrinks and separates from the model, and the formed rough billet take out. The grouting method is mainly suitable for batch moldin...

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Problems solved by technology

[0003] However, the problem of low firing efficiency often occurs in the actual production process of products with complex shapes. This is due to the complex shape of the product, the different dehydration rates of different parts after the slurry is injected into the mold, and the solid particles in the slurry are superimposed and attached to the wall of the green body. The different layers make the internal structure distribution of the green body uneven. During the firing process, when the stress caused by the internal expansion and contraction of some products is concentrated on the section of the hierarchical structure, the structural section of the green body becomes larger, causing cracks or even direct cracking.

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