Alumina porous ceramic filter production process-Sizing process, Sponge modification process,, Dipping and sizing process, Drying process, Firing process, Quality inspection process.

Sizing process

The choice of formula must ensure the best consistency and fluidity of the slurry, so as to ensure that the product can be sizing uniformly during the sizing process to reach the specified sizing weight. Because this is a prerequisite to ensure the product strength and through-hole rate are qualified. The adjusted slurry judges its performance by its specific gravity and consistency.

Sponge modification process

Sponge modification is to prepare for the sizing process to improve the sizing performance of the sponge and make the sizing uniform.

Dipping and sizing process

The modified dry sponge product is uniformly coated into a green body through the adjusted slurry on a roller press. For sponge products with different a meshes, slurry of different consistency is needed for sizing, o,therwise the sizing effect will not be achieved. If you wanta to buy porous ceramic filter, please email sales@alalloycasting.com

Drying process

The drying process mainly lets the sizing semi-finished product volatilize the moisture, and it is generally controlled below 1.0%.

For products with more extensive specifications, the dry environment, porous ceramic filter such as temperature and humidity, needs to be controlled to prevent dry deformation and crack defects.

Firing process

The firing process is the last process in production. Due to the improvement of the formula and considering the production cost, most of the SiC foam ceramics of ceramic foam enterprises do not need to be protected by the atmosphere, and the firing temperature is generally 1350 to 1450 ℃.

Quality inspection process

Due to the porous ceramic filter structure of foam ceramics, the burned products are more or less slagging. For foundries, in addition to considering the strength and mesh of the filter, the slag drop phenomenon is also a hot issue that they are most concerned about. Because the filter itself is used to filter the inclusions, its own slag will have the opposite effect, leading to the casting scrap. Therefore, in addition to checking the appearance and internal quality of the quality inspection process, it is also necessary to clean up the slag.