Silica is the manufacture of glass, quartz glass, water glass, optical fiber, and refractory materials. When the time is perfect crystalline silica crystal; after silica gel of dehydration is agate; colloidal silica water after solidification become opal; silica grains at less than a few microns, on the formation of chalcedony, chert, secondary quartzite. Silica ultrafine silica dust credibility, to achieve a specific surface area 100m2 / g or more (automatic F-Sorb 2400 nitrogen adsorption BET specific surface area tester) Which cheap silica, silica can be suspended in the air, If a person's long-term inhalation of dust containing silica, it will suffer from silicosis (Formerly known as silicon because silicon, silicon lung Formerly known as silicosis). Which is cheaper _ silica Weifang Fuyuan (certified) _ silica provided by Weifang Fuyuan Environmental Technology Limited. Weifang Fuyuan Environmental Protection Technology Co., Ltd. (www.wfdafuyuan.com) (www.wfdafuyuan.com) Shandong Weifang, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Weifang Fuyuan leadership with the staff warmly welcome all inquiries negotiations to create Weifang Fuyuan a better future. You can also access (www.wfdafuyuan.com/supply_details_46405035.html), for more information about the company.