浸出试验工艺条件对制备低磷铁精矿品位影响.docVIP

浸出试验工艺条件对制备低磷铁精矿品位的影响 张晓刚1，张桂芳2，张宗华1，陈晓鸣1 (1.昆明理工大学国土与资源工程学院，云南 昆明 650093；2.昆明理工大学应用技术学院，云南 昆明 650093) 摘 要：对高磷赤褐铁矿进行了光谱分析、化学成分分析、铁物相的测定，以及矿石赋存状态研究。H2SO4浓度以8.33％较为合适，浸出温度以60为宜，液固比以25：1为宜，浸出时间以15min为宜。得到铁品位58.96％，磷品位为0222％，铁回收率为7508％。 关键词：浸出试验；工艺条件；品位；低磷铁精矿 中图分类号：TD913 文献标识码：B 文章编号2010)04-0061-03 Effect of technological conditions of leaching experiment on grade of low-phosphorus iron ore in preparation process ZHANG Xiao-gang1, ZHANG Gui-fang2, ZHANG Zong-hua1, CHEN Xiao-ming1 (1.College of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2.College of Applied Technology, Kunming University of Science and Technology, Kunming 650093, China) Abstract: Spectrum analysis, chemical composition analysis, determination of iron phase and the modes of occurrence on the ore of high phosphorus hematite-limonite had been studied by the paper. According to the character of hematite-limonite ore, leaching experiment were done by choosing different hydrochloric acid and sulfuric acid respectively. Different technology conditions of best leaching acid were studied in the concentration of acid, leaching temperature, liquid-to-solid ratio and leaching time. Best technology conditions were shown: the concentration of H2SO4 is 10 %, leaching temperature is 60℃, liquid-to-solid ratio is 2.5 : 1 and leaching time is 15 minutes, an ideal concentrate was obtained, which had the iron grade of 58.96%, the phosphorous grade of 0. 222%, and the iron recovery of 75.08%. Keywords: leaching experiment; technological condition; grade; low-phosphorus iron concentrate ore 目前，我国还有占总储量14.86％的高磷铁矿1％，磷主要以类质同象56.06 %，铁回87.81 %，磷品位1.26％。为了提高铁的品位， 1 研究方法 11 试样性质 试样是云南某高磷赤褐铁矿，试样光谱分析1，试样化学成分分析见表2，试样铁物相分3。% 元素 Ag Al As B Ba Be Bi Ca 概量 0.0002 1 0.007 ＜0.001 ＜0.03 ＜0.001 0.003 0.3 元素 Cd Co Cr Cu Fe Ga Ge Mg 概量 ＜0.001 0.01 0.002 0.03 ＞10 0.001 ＜0.001 0.2 元素 Mn Mo Ni P Pb Sb Si Sn 概量 0.8 0.003 0.05 0.3 0.004 ＜0.01 ＞10 0.002 元素 Ti V W Z