AP-42, CH 11.21: Phosphate Rock Processing - US EPASource Classification Code (SCC) for phosphate rock processing is 3-05-019. . Consequently, there is no significant emission potential from wet grinding.rock phosphate grinding and classification,Background Report, AP-42, Vol. I, SECTION 11.21 Phosphate Rock .Industrial Classification (SIC) code for phosphate rock processing is 1475. . general, southeastern Idaho deposits require crushing, grinding, and classification.
rock phosphate grinding and classification