Application Scenarios And Selection Guidelines For Silicon Carbide Ceramic Foam Filters

This product is widely utilized in the casting production of both ferrous and non-ferrous metals. Product selection should be determined based on the type of molten metal, the pouring temperature, and the specific requirements of the casting.

1. Applicable Materials

Cast Iron and Cast Copper: Silicon carbide-based filters are the preferred choice, suitable for use with ductile iron, gray iron, malleable iron, and copper alloys.

Cast Steel: Zirconia-based filters are typically selected (offering thermal resistance up to 1760°C); however, silicon carbide-based filters also find application in specific low-temperature steel casting processes.

Aluminum Alloys: Alumina-based filters are generally selected, although silicon carbide-based filters may also be utilized under specific, high-demand requirements.

2. Specification Selection

Pore Density (PPI): Refers to the average number of pores per linear inch. Common specifications include 10 PPI, 15 PPI, 20 PPI, and 30 PPI.

• Ductile Iron Castings: Typically utilize 10 PPI or 15 PPI filters.

• Gray Iron and Cast Copper Castings: Typically utilize 15 PPI or 20 PPI filters.

• Aluminum Alloy Castings: Typically utilize 20 PPI or 30 PPI filters.

Dimensions and Thickness: The dimensions must be determined by calculating the required effective filtration area relative to the total volume of molten metal being filtered. The thickness typically ranges from 15 mm to 40 mm; for larger filter dimensions, it is recommended to appropriately increase the thickness to ensure structural integrity.