摘要
Abstract
The refractory amphibole type magnetite in Yuanjiacun iron ore deposit has the charac-teristics of high content of iron-bearing silicate,complex mineral composition,and extremely fine dissemination sizes. Based on process mineralogy study,the purpose of reducing the cost of grind-ing was achieved through the process of preconcentration(early loss) and reverse flotation or elutri-ation magnetic separation of the low intensity magnetic separation (LIMS) concentrate to obtain most of the high-grade iron concentrate under relatively coarse grain conditions. Finally, the ore dressing process suitable for amphibole type magnetite ore in yuanjiacun was developed,which con-tained a wet preconcentration of -3 mm grains,two stages of grinding,four times of low intensity magnetic separation,a reverse flotation,and a regrinding of flotation tailings with the LIMS. With this process,an iron concentrate with a yield of 29.42%,a TFe grade of 68.18%,and a TFe re-covery of 66.55% could be obtained. This study solves the problem of the economic exploitation and utilization of the amphibole type magnetite ore in Yuanjiacun.关键词
袁家村铁矿/闪石型磁铁矿/磁选/反浮选/预选Key words
Yuanjiacun iron ore/amphibole type magnetite/magnetic separation/reverse flota-tion/preconcentration分类
矿业与冶金
