旋流-静态微泡浮选柱浮选某难选钼矿的试验研究  

Experimental study on separating some molybdenum ore by using cyclonic-static micro-bubble flotation column

作　　者：刘炯天[1] 李小兵[1] 王永田[1] 曹亦俊[1] 吕发奎[1] 

机构地区：[1]中国矿业大学化工学院

出　　处：《中南大学学报（自然科学版）》2008年第2期300-306,共7页Journal of Central South University:Science and Technology

基　　金：国家杰出青年基金资助项目(50425414);教育部博士生访学项目资助(2006年)

摘　　要：针对某地高氧化率、微细粒不均匀嵌布、易泥化的难选钼矿石,提出粗细粒级分级分选新工艺,即原矿经破磨后将其中粒度小于0.020mm的微细粒级部分利用水力旋流器分离出来,采用高效、节能的微细粒分选设备旋流-静态微泡浮选柱进行分选,解决了该钼矿中微细粒级钼金属回收问题。以煤油为捕收剂,松醇油为起泡剂,水玻璃为分散剂和脉石矿物抑制剂,考察给料量、循环泵工作压力、药剂用量等因素对浮选指标的影响。分别采用一粗二精一扫和一粗二精2种工艺流程对平均钼含量为0.181%的原矿进行连选试验。研究结果表明:采用粗细粒级分级分选、细粒浮选柱回收的工艺流程可获得精矿品位为24.64%,回收率为54.33%的钼精矿,并简化了工艺流程。For some granule molybdenum ore with high oxidation ration, unhomogeneous dissemination and ease to slime which is difficult to separate, a new technological flowsheet was developed to solve the recovery of the granule molybdenum ore. The granule molybdenum ore under 0.020 mm was separated by using hydrocyclone, then processed with high efficiency and energy consumption-saving mineral processing equipment, cyclonic-static micro-bubble flotation column. In the experiment, the kerosene was used as collector, pine oil as frother, sodium silicate as dispersant and gangue minerals inhibitor. The effect of several parameters on floatation efficiency, namely, the feed capacity, pressure of circulating pump and the dosage of sodium silicate, pine oil, kerosene were systemically investigated. The flowsheets, i.e., the closed-circuit of one stage roughing one stage scavenging and two stage cleanings, and the closed-circuit of one stage roughing and two stage cleanings, were adopted to process raw ore containing Mo of 0.181%. The results show that the molybdenum concentrates containing Mo of 24.64% and recovery rate of 54.33% are obtained. Simultaneously, the technological flowsheet for the recovery of the granule molybdenum ore is shortened obviously.

关 键 词：旋流-静态微泡浮选柱 浮选 钼矿 氧化率 泥化 

分 类 号：TD923[矿业工程—选矿]