山西某金红石矿选矿试验研究

山西某金红石矿采用重选主干流程进行选别,精矿产品TiO2品位为90%左右,但金红石(TiO2)的回收率不足50%。为提高金红石的选矿回收率,开展了以浮选为主干流程的选矿工艺研究。确定的选矿方案为两次浮选抛尾─金红石浮选(一次粗选、两次精选)─浮选精矿除杂(弱磁选—强磁选—重选)。全流程试验结果表明:采用浮选主干流程大大提高了精矿TiO2的回收率,总精矿TiO2回收率为69.25%,金红石矿物的回收率达到86.42%,其中精矿1含TiO289.58%、TiO2回收率46.84%;精矿2含TiO280.53%、TiO2回收率22.41%。同时综合回收了磁铁矿和钛铁矿。

SCIENTIFIC RESEARCH ON MINERAL PROCESSING TECHNOLOGY FOR A CERTAIN RUTILE IN SHANXI

The ore, dealt with in this paper, is a certain rutile in shanxi province, China. A trunk flowsheet with gravity concentration was used to treat the ore, and the grade of rutile concentrate is about 90% TiO2, but the recovery is less than 50% TiO2. In order to enhance the recovery for rutile, the laboratory test, using the truck flowsheet with flotation, were carried out. The flowsheet is that firstly floatable gangue is removed with flotation; secondly rutile is recovered with flotation; and thirdly impurity is separated with LIMS, HIMS, gravity concentration from the rutile concentrate. The experiment result showed that the recovery of rutile concentrate is improved obviously, and the recovery of ultimate rutile concentrate is 69.25% TiO2 and 86.42% rutile. The grade of first concentrate is 89.58% TiO2, and the recovery is 46.84% TiO2. The grade of second concentrate is 80.53%, and the recovery is 22.41% TiO2. In addition, magnetite and ilmenite are recovered in the flowsheet.