拜耳法赤泥磁选铁精矿浮选脱钛研究

Titanium Removal by Flotation of Iron Concentrate from Magnetic Separation of Bayer Red Mud

对山东某赤泥磁选铁精矿进行了反浮选脱钛研究,以油酸钠为捕收剂、玉米淀粉为赤铁矿抑制剂、硫酸为pH值调整剂,在pH=9、玉米淀粉和油酸钠用量分别为500 g/t和1500 g/t时,铁精矿中TiO_(2)品位可由6.90%降至2.73%,对应的TFe回收率为41.80%。捕收剂吸附量和红外光谱测试结果表明,油酸钠具有选择性吸附特性,进一步证实了采用油酸钠对赤泥磁选铁精矿进行反浮选脱钛的可行性。

An iron concentrate obtained from magnetic separation of red mud from Shandong was used in an experimental study on the effect of titanium removal by reverse flotation.In the experiment,with sodium oleate as collector,corn starch as hematite depressant,sulfuric acid as pH regulator,pulp pH of 9,and the addition of corn starch and sodium oleate at an amount of 500 g/t and 1500 g/t,respectively,the iron concentrate was produced,with the TiO_(2) grade fell down from 6.90%to 2.73%,and the TFe recovery reaching 41.80%.The results of collector adsorption and IR analysis show that sodium oleate exhibits selective adsorption characteristics,which has further confirmed the feasibility of sodium oleate used in removing titanium by reverse flotation of iron concentrate obtained from magnetic separation of red mud.