... process, the corresponding production cost greatly lowers. Calculating as per RMB 800 yuan per ton of raw coal price and needing 8 tons ... process, require using white coal. Thus, Calculating as per RMB 1,000 yuan per ton of white coal price and needing 12 tons ... process can save the cost by about RMB 230 yuan per ton as compared with conventional process. Potassium sulfate process & equipments ...