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磷酸盐矿床按其成因可分为两大类型:火成岩型和沉积岩型。对于火成岩型矿床,磷酸盐呈高品位的晶体磷灰石产出,其精矿品位常高达37—38%P_2O_5。然而,对于沉积型矿床,磷酸盐可呈多种形式出现,从松散的骨质碎片到结晶程度很好的次生磷酸盐矿物;其中磷酸盐含量,一般要比火成岩磷灰石低,精矿品位相应也较低,其下限为28—30%P_2O_5。对于这两个主要矿床类型,根据其脉石矿物是否属于硅酸盐类或其矿石中是否含有相当数量的诸如方解石和白云石的碳酸盐类矿物,可以对矿床作进一步的分类。当使用传统的用于磷酸盐浮选的脂肪酸类捕收剂时,这种碳酸盐矿物的浮选行为与磷酸盐矿物相似。它们使磷酸盐精
Phosphate deposits according to their causes can be divided into two types: igneous rock type and sedimentary rock type. For igneous rock deposits, high-grade phosphate rock phosphate apatite output, the concentrate grade often as high as 37-38% P_2O_5. However, for sedimentary deposits, phosphates can occur in many forms, from loose bone fragments to well-crystallized secondary phosphate minerals, with phosphate levels generally lower than those of igneous rock apatite Corresponding lower grade, the lower limit of 28-30% P_2O_5. For both of these major deposit types, the deposits can be further classified according to whether their gangue minerals belong to silicates or whether their ore contains a significant amount of carbonate minerals such as calcite and dolomite. When using conventional fatty acid collectors for phosphate flotation, the carbonate minerals have similar flotation behavior to phosphate minerals. They make phosphate fine