武汉工程大学学报2015，Vol.37Issue(9)：35-39,5.DOI:10.3969/j.issn.1674-2869.2015.09.006
宜昌低品位胶磷矿筛分分级微差密度重介质分选技术
Classification-heavy medium separation in minor differential for beneficiation of low grade collophanite in Yichang
摘要
Abstract
To solve the common key technological problems existed in beneficiation of low grade collophan-ite, technical properties of phosphate ore, such as material composition, occurrence states and dissemination properties of minerals, etc. were investigated. The key separation technology and the industrial utilization of sieving and classification-heavy medium separation in minor differential for beneficiation of low grade collo-phanite were analyzed via self-dependent innovation and technology integration based on the research of pro-cess mineralogy. Then a series of industrial production facility of sieving and classification-heavy medium separation in minor differential with annual processing capacity of 1.2 million tons of phosphate rock was es-tablished, which was characterized by high separation accuracy, good stability in controlling the proportion of separation. This novel processing technology can recover and purify medium, and effectively decrease the consumption of medium and eliminate the instability caused by the change of density and the separation of minerals and medium. Under the condition of subtle density difference, the grade of concentrate reaches 28.44%, the grade of tailing is lower than 10% when three products dense medium cyclone with unpressur-ized feeding and control systems of effective medium density are applied in industry to realize the separation of Yichang phosphate with high density of 2.80 -2.90 g∕cm3. Middle products can be recovered and the com-prehensive recovery of the resource is improved with the rate over 83% by combining with selective crush-ing and screening classification.关键词
低品位胶磷矿/重介质/分选Key words
low grade collophanite/heavy medium/beneficiation分类
矿业与冶金引用本文复制引用
罗惠华,瞿定军,苗华军,胡学超,胡正,张战利..宜昌低品位胶磷矿筛分分级微差密度重介质分选技术[J].武汉工程大学学报,2015,37(9):35-39,5.基金项目
湖北省重大科技创新计划(2014ACA036) （2014ACA036）
十二·五科技支撑项目(2013BAB07B01) （2013BAB07B01）
