... , choosing, magnetic, screening, etc. The brown fused alumina of our factory had high purity,detailed texture ... PAC, anthracite filter media, quartz sands, walnut shell filters, garnet filters, polishing sands, rust sands, sponge iron, medical stones, ceramic ... , corundum, white corundum, black corundum, silicon carbide, spinel and other refractory products. Strong economic strength, advanced production ...