In order to achieve casting of aluminum has good physical and chemical performance and machining performance, the molten metal should have the characteristics of high purity, the velocity of liquid aluminum flat. With the continuous improvement of aluminum and aluminum alloy product performance requirements, new requirements for aluminum liquid filtration has been put forward. Alumina ceramic foam as foam ceramic three categories (aluminum oxide, silicon carbide, oxidation wrong) is an important branch, is also one of the first to be used foam ceramics. It is widely used in aluminum and its alloy casting industry. So the Ceramic Filter Manufacturing Process is important for aluminum liquid filtration.
Influencing Factors in Ceramic Filter Manufacturing Process
Each process of ceramic foam filter manufacturing process affects the product quality of foam ceramics. The key process ingredients, sponge processing and sintering have the greatest impact on product quality. The slurry spraying process mainly affects the ceramic filter manufacturing process, and at the same time, it also has a certain impact on the essence of the ceramic filter.
Slurry particle size
The particle size of the slurry determines the dispersibility of the emitted slurry. The finer the size of the slurry, the better the dispersibility of the spit out liquid material, and the sprayed slurry is uniform. When the size of the slurry is fine, the nozzle wear is also small. The particle size of the slurry also determines the surface sintering conditions of the product.
Water content of slurry
The water content of the mud directly determines the viscosity of the sauce, and the consistency directly affects the effect of the shotcrete. For the spraying process after sizing, the moisture content of the slurry should not be too low, otherwise, blind holes will appear after spraying, and the spraying effect is not good. Generally, the moisture content is controlled at 35%-40%. For the spraying process after drying, the surface of the green body is dry and hard, and the adsorption effect of thick slurry is good. Therefore, the sprayed grout has a low moisture content control, and the spraying effect on the surface is much better. Generally, the moisture content is controlled at 25% to 35%.
Spraying slurry capacity
The capacity of sprayed slurry is one of the important indicators to measure whether the spraying effect is ideal, and it is also an important factor for whether each piece of green body is uniform. For filter plates of different specifications and sizes, the capacity of spraying slurry is different. Of course, for different water content of the slurry, the amount of sprayed slurry is also different.