摘要
采用焙烧磁选—酸浸工艺处理贵州赫章鲕状赤铁矿,研究了焙烧磁选、酸浸因素对提铁脱磷的影响。试验结果表明,焙烧温度、磨矿细度对提铁脱磷影响较大。随着焙烧温度增加,铁品位和回收率均先增加后降低,磷含量先降低后增加;随着磨矿细度增加,铁品位先降低后增加,回收率先增加后降低,磷含量逐渐降低;采用酸浸可将焙烧磁选精矿中的磷含量降到0.20%以下。当焙烧温度800℃,焙烧时间40 min,加入煤粉量占原矿量5.00%时获得的焙烧矿样,经过磨矿,采用一次粗选、一次精选弱磁选工艺流程,获得含铁59.21%,回收率70.32%,含磷0.43%的铁精矿;磁选精矿采用酸浸,获得含铁60.43%,含磷0.18%的铁精矿。
The process of roasting-magnetic separation and acid leaching was adopted to deal with oolitic hematite ore in Hezhang,Guizhou,and the influence of the roasting-magnetic and acid leaching element on iron increase and phosphorous reduction was investigated.The results show that roasting temperature and grinding fineness have an obvious effect on iron increase and phosphorous reduction.With the roasting temperature increasing,iron grade and recovery were all first increasing and then decreasing,while phosphorus content was first decreasing and then increasing.With grinding fineness increasing,iron grade was first decreasing and then increasing,while iron recovery was first increasing and then decreasing and phosphorus content was reducing gradually.Using acid leaching would reduce the phosphorus content to 0.20% below in the roasting-magnetic concentrate.When the ore was roasted for 40 min with 5.00% coal powder amount at the temperature of 800 ℃,after first grinding then adopting a flow-sheet consisting of one-roughing and one-cleaning magnetic separation,an iron concentrate grading 59.21% at a recovery of 70.32% with phosphorus content of 0.43% was obtained.When acid leaching for magnetic separation concentrate was adopted,an iron concentrate grading 60.43% with phosphorus content of 0.18% was obtained.
出处
《金属矿山》
CAS
北大核心
2010年第3期48-52,共5页
Metal Mine
基金
贵州省优秀科技教育人才省长专项基金项目(编号:Z073218)
贵州大学研究生创新基金项目(编号:2009028)
关键词
鲕状赤铁矿
焙烧
磁选
酸浸
提铁脱磷
Oolitic hematite
Roasting
Magnetic separation
Acid leaching
Iron increase and Phosphorous reduction
