Silica (quartz stone) is the general term for any type of vein quartz, quartzite, quartz sandstone. It mainly used for the acid refractory bricks in metallurgical industry. Pure silica is as quartz glass or refining of monocry stalline silicon. In fact, silica, after deep processing with vertical roller mill and then is widely used in the application of the chemical industry, sodium silicate and silicon dioxide, silica obtained by the chemical processing. Sodium silicate is silica chemical processing products used most widely, the largest amount of products used in the manufacture of a variety of silicon compounds, cardboard, plywood, some metal materials and foundry industry also heavily used as adhesives, soap, washing agent additives, paper performance improver in the textile industry for cotton scouring and bleaching additives, fire treatment agent of the fabric, the dye color reagent.