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采自安得拉邦低品位、易碎锰矿石 -2 8+0 7mm粒级经跳汰选矿 ,所得精矿锰品位可提高 7%～ 8% ,平均产率为5 7%。跳汰精矿和未经跳汰的 -0 7mm粒级合并 ,并磨至 -15 0 μm ,然后进行湿式强磁选。磁性产品Mn的含量增加6 % ,总产率仅 5 0 %。 -15 0 μm粒级水力旋流器分级结果表明 ,分级方法对提高锰品位是行不通的 ,因为矿石中的细粒级是由铁锰氧化矿物和铝硅酸盐脉石矿物组成。但是 ,-15 0 μm粒级湿式强磁选的非磁性产品进行水力旋流器分级 ,其沉砂再进行第二次湿式强磁选 ,则磁性产品锰含量至少可增加 7%～ 8% ,总产率约为 5 0 %～ 5 2 %。这两种方法的结合并没有降低产品中磷的含量。从矿石中主要相和磷的分布率的线性关系可以看出矿石中磷和其它主要相的复杂共生关系
Mining from Andhra Pradesh low grade, friable manganese ore -2 8 + 0 7mm grain size by jig beneficiation, the resulting concentrate grade manganese can be increased by 7% to 8%, the average yield was 57%. The jumped concentrate and unrated - 0-7 mm fractions were combined and ground to -15 0 μm, followed by wet magnetic screening. The magnetic product Mn content increased by 6%, the total yield was only 50%. The grading results of the -15 0 μm particle-scale hydrocyclones show that the grading method is not viable to improve the grade of manganese because the fine fraction in the ore consists of iron-manganese oxide minerals and aluminosilicate gangue minerals. However, the non-magnetic product of -15 0 μm particle size wet magnetic separator is classified by hydrocyclone. When the second wet magnetic separator is applied to the grit, the manganese content of the magnetic product can be increased by at least 7% -8% The total yield is about 50% to 52%. The combination of these two methods does not reduce the amount of phosphorus in the product. From the ore in the main phase and the distribution of phosphorus in the linear relationship can be seen in the ore of phosphorus and other major complex phase symbiosis