亚氯酸钠对钛铁矿的表面改性及浮选行为的影响  

Effect of sodium chlorite on surface modification and flotation behavior of ilmenite

作　　者：张云 叶国华[1] 胡渝杰 项新月 荣一阳 宋昌溆 Zhang Yun;Ye Guohua;Hu Yujie;Xiang Xinyue;Rong Yiyang;Song Changxu(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《钢铁钒钛》2024年第2期94-101,共8页Iron Steel Vanadium Titanium

摘　　要：采用亚氯酸钠对钛铁矿进行表面改性以增强捕收剂的吸附效果。首先从微浮选试验与Zeta电位角度研究了亚氯酸钠改性钛铁矿的机理,结果表明,在油酸钠体系下,经过亚氯酸钠改性后,钛铁矿的回收率有大幅度提升,并在油酸钠浓度1.54×10^(-4)mol/L、亚氯酸钠浓度80 mg/L、pH=8时达到最佳值,为80.67%。在pH 5~10时,在亚氯酸钠和油酸钠同时作用下,钛铁矿Zeta电位比仅添加油酸钠时更趋向于负值,表明油酸钠在钛铁矿表面吸附量增加。然后以TiO_(2)品位为5.83%的钛铁矿实际矿石为研究对象,通过响应曲面法分析了水玻璃、油酸钠、亚氯酸钠之间的交互作用对钛铁矿浮选过程的影响,并优化了药剂制度,在药剂用量为水玻璃160 g/t、油酸钠110 g/t、亚氯酸钠220 g/t的条件下进行验证试验,可得钛精矿中TiO_(2)品位和回收率为33.92%和86.30%,所得结果与模拟的预测结果接近,表明响应模型具有较高的可靠性。最后通过闭路试验得到钛精矿品位为48.24%,回收率为62.55%的良好指标。The surface modification of ilmenite with sodium chlorite was carried out to enhance the adsorption effect of collector.The mechanism of sodium chlorite modification was investigated by microflotation test and zeta potential.The results of microflotation test showed that the recovery of ilmenite in sodium oleate system was greatly improved after sodium chlorite modification,and the optimal conditions were sodium oleate concentration of 1.54×10^(-4)mol/L,sodium chlorite concentration of 80 mg/L and pH=8.When pH was 5-10,under the simultaneous action of sodium chlorite and sodium oleate,the zeta potential of ilmenite tended to be more negative than that of sodium oleate-treated ilmenite,demonstrating that the adsorption of sodium oleate on the surface of ilmenite was increased.The effects of interaction between inhibitor sodium silicate,collector sodium oleate and oxidant sodium chlorite on TiO_(2) grade and recovery in titanium concentrate were analyzed by response surface method,and then the reagent system was optimized.Under the conditions of 160 g/t water glass,110 g/t sodium oleate and 220g/t sodium chlorite,the actual grade and recovery of TiO_(2) in titanium concentrate were 33.92%and86.30%,which were close to the predicted results,indicating that the response model has high reliability.Finally,through the closed-circuit test on this basis,good indexes of titanium concentrate grade48.24%and recovery 62.55%were obtained.

关 键 词：钛铁矿 亚氯酸钠 表面改性 响应曲面法 回收率 

分 类 号：TD951[矿业工程—选矿]