Export/import of Silica

Hi,
If anyone is involved in export/import of Silica (SiO2) please let me know.
The silica powder material is very important industrial component, more than 300 industries such as glassware, crystal glass, plate glass, fiber glass, optical glass, and templates plumbing, In addition to strippers in ceramics, bricks, filters water purification plants, water wastewater, swimming pools, and as an extensor filler in the rubber industry, plastics, paper, and paint. Also, in manufacturing a special type of cement and in various chemical industries as well as a discount factor for the degree of melting of the oxides in the basal melting operations