光电选矿技术在中低品位胶磷矿选别中的应用研究

Research on the Application of Optoelectronic Beneficiation Technology in Beneficiation of Medium and Low Grade Phosphate Ores

针对云南“贫、细、杂”各类型胶磷矿资源,基于光电选矿原理,探讨了贫矿磷资源在粒级较大(10~40mm)的情况下,运用光电选矿技术提高磷矿品位,从而提高磷资源的综合利用率的方法。试验选取硅质及硅酸盐型、混合型、碳酸盐型中低品位胶磷矿矿样进行光电选矿的适应性试验。通过分析各类型磷矿的结构构造、矿物组成、有用矿物及脉石矿物组分含量,确定光电选的可行性和分选参数。试验结果表明,光电选矿技术对于各类型胶磷矿均具有较好的分选效果,选别硅质及硅酸盐型矿物的效果最好。在保证精矿P_(2)O_(5)品位和回收率的前提下,可通过提前抛出部分低品位矿石,提高磷矿品位;根据不同类型的胶磷矿,选择合适的控制参数,获得最优的分选效果。

Aiming at various types of poor,fine,and miscellaneous phosphate ore resources in Yunnan,based on the principle of photoelectric beneficiation,the method of using photoelectric beneficiation processing technology to improve the grade of phosphate ore was explored under larger particle sizes(10~40mm),so as to improve the comprehensive utilization rate.The siliceous and silicate type,mixed type,and carbonate type of medium and low grade phosphate ore samples were selected for the adaptability test of photoelectric beneficiation.By analyzing the structural structure,mineral composition,and the contents of gangue mineral components of various types of phosphate ores,the feasibility and sorting parameters of photoelectric beneficiation were determined.The experimental results show that the photoelectric beneficiation technology has good separation effects for various types of phosphate ores,with the best beneficiation effect for siliceous and silicate type minerals.On the premise of ensuring the P_(2)O_(5)grade and recovery rate of the concentrate,the phosphorus ore grade can be improved by throwing out some low-grade waste rocks in advance.Based on experiments of different types of phosphate ores,appropriate control parameters can be selected to achieve the optimal beneficiation effect.