In the exploration phase of phosphorus ore, industrial indexes can refer to Table 1 presented a preliminary evaluation of the deposit. Phosphorus-deficient areas can be considered according to factors such as the mining method of phosphate rock and apatite deposit, the difficulty of mineral processing , the comprehensive utilization of common associated minerals (components) and the combination with mineral fertilizer. The general cut-off grade P 2 O 5 ≥ 2% ~ 4%, industrial grade P 2 O 5 ≥ 6%. Industrial grades can also be appropriately reduced under conditions where macroeconomic benefits permit. Kitchen And Dining,Multifunction Electric Health Pot,Stainless Steel Electric Health Pot,Electric Heating Soup Kettle GUANGDONG DEERMA TECHNOLOGY CO., LTD. , https://www.fsdeerma.com