Grinding polishing abrasives walnut shell Surface Smoothing walnut shell sand

Grinding polishing abrasives walnut shell Surface Smoothing walnut shell sand Walnut shells are made of high-quality pecan shells as raw materials, processed into granules after degreasing, crushing, screening, etc., and then processed by polishing, steam washing, drug treatment, and two screening processes. Walnut shell filter has high hardness, abrasion resistance and good pressure resistance,stable chemical properties, does not dissolve in acid and alkali, strong