Fe~(3+)、Fe~(2+)对白云石、高岭土、石英浮选行为的影响研究

在油酸钠体系下,考察了Fe~(3+)、Fe~(2+)随着pH值的变化对白云石、高岭土、石英纯矿物浮选的影响,以及在最佳pH值条件下Fe~(3+)、Fe~(2+)添加量对矿物浮选的影响;并分析了Fe~(3+)、Fe~(2+)对Zeta电位的影响作用。结果表明,白云石在油酸钠体系中有较好的浮选特性,且条件因素影响不显著;高岭土在油酸钠溶液中浮选回收率最高可达80%,在Fe~(3+)、Fe~(2+)参与的强酸强碱环境下几乎没有可浮性,Fe~(3+)一定程度上活化了高岭土,而Fe2+则起到了抑制作用;石英的可浮性较差,加入Fe~(3+)、Fe~(2+)后经调节pH值均能使石英的最佳回收率达到90%以上;Zeta电位测试证实了浮选实验的结果,说明Zeta电位的变化与回收率存在一定的内在关系。

Study on influence of Fe3+ and Fe2+ on flotation of dolomite,kaolin and quartz

The influence of Fe³⁺ and Fe²⁺ on the flotation of dolomite, kaolin and quartz with pH change was investigated in presence of sodium oleate.Moreover, the effect of Fe³⁺ and Fe²⁺ dosage on mineral flotation under optimum pH condition was also studied.Meanwhile, the effect of Fe³⁺ and Fe²⁺ on Zeta potential was analyzed.The results showed that dolomite had good flotation characteristics in sodium oleate system, and the influence of experiments conditions was insignificant.The highest flotation recovery of kaolin was 80% in sodium oleate solution.However, the flotability was not observed in strong-acid and strong-base environments in presence of Fe³⁺ and Fe²⁺.Fe³⁺ could activate the kaolin, while Fe²⁺ played the inhibition effect.The flotability of quartz was poor, but the highest recovery could be up to 90% after adding Fe³⁺ and Fe²⁺ and adjusting pH value.The Zeta potential results proved the results of flotation tests, indicating that the change of Zeta potential was related to the recovery rate.