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采用两段浮选的方案研究了印度中央邦恰布(Jhabua)地区低品位燧石-钙质岩磷酸盐矿石的选别。在第一段浮选作业中,将磷灰石和方解石一起浮出,排除二氧化硅;在第二段浮选作业中,将磷灰石抑制,浮出方解石。所用的药剂包括油酸钠、硅酸钠、正磷酸及硫酸,系统地研究了这些药剂用量对各级作业分选效率的影响。推荐了一个选万11含P_2O_5为12.5%、SiO_2为26.5%、CaO/P_2O_5为2.64含方解石2.32%)的低品位磷酸盐矿石的流程,采用所推荐的流程可获得含P_2O_5为27.2%、SiO_2为6.37%及CaO/P_2O_5较低(1.66)的综合精矿,P_2O_5的总回收率为73%。
A two-stage flotation scheme was used to study the classification of low-grade chert-calcareous phosphate ores in the Jhabua region of the Indian state of Central India. In the first flotation operation, apatite and calcite emerge together to exclude silica; in the second flotation operation, apatite is suppressed and emerges from calcite. The agents used include sodium oleate, sodium silicate, orthophosphoric acid and sulfuric acid. The effects of these dosages on the separation efficiency at all levels were systematically studied. Recommended a low-grade phosphate ore containing 11% P 2 O 5 12.5%, SiO 2 26.5%, CaO / P 2 O 5 2.64% with calcite 2.32%), the proposed process can be obtained containing P 2 O 5 27.2%, SiO 2 Of 6.37% and the lower concentration of CaO / P 2 O 5 (1.66), the total recovery of P 2 O 5 was 73%.