... shells and husks, coal, woods, cylindrical products, powdered activated carbon, PAM, PAC, anthracite filter media, quartz sands, walnut shell ... sand filters, zeolite filters, fillers, bulk bauxite, corundum, white corundum, black corundum, silicon carbide, spinel and other refractory products ... :Picture of our factory: Process of making activated carbon: Transport Packing: coal-based column activated ...