Fused Silica Lump, Quartz Tube, Barite Powder. Type: Silica Powder Model Number: fused silica sand Application: Refractory Our company is a major manufacturer of silica (quartz) products such as high purity silica sand, sil Our company is a major manufacturer of silica (quartz) products such as high purity silica sand, silica powder, microsilica powder