非洲某钛铁矿初步选矿试验研究

Experimental Research on Preliminary Mineral Processing on an Ilmenite Ore in Africa

摘要:

在实验室条件下，对南非某钛铁矿进行初步选矿试验研究，用以初步确定该类型钛铁矿可选性及选矿工艺方法。该类型原矿TFe品位20.46%，TiO₂品位10.08%，通过200 mT干式磁选进行分选，获得干式磁选尾矿。随后对该尾矿采用螺旋溜槽-摇床重选-湿式弱磁选工艺进行分选，最终获得TiO₂品位为46.4%的钛精矿。为进一步提高钛精矿品位，在实验室条件下采用浮选工艺进行分选试验，在磨矿细度为-0.074 mm含量占比为78%及粗选捕收剂用量400 g·t^-1和起泡剂用量100 g·t^-1条件下，经过一粗、一精、二扫浮选流程进行选别，最终可获得含TiO₂为49.1%的合格钛精矿。通过上述试验研究，该钛铁矿可采用磁-重-浮联合工艺流程，以获取合格品位要求的精矿。

Abstract:

Under laboratory conditions， a preliminary beneficiation test was conducted on an ilmenite in South Africa to preliminarily determine the selectivity and beneficiation process of this type of ilmenite. This type of raw ore has a TFe grade of 20.46% and a TiO₂ grade of 10.08%. It is separated by 200 mT dry magnetic separation to obtain dry magnetic separation tailings. The tailings are processed by spiral chute-shaker gravity separation-wet weak magnetic separation process. After sorting， the titanium concentrate with TiO₂ grade of 46.4% was finally obtained. In order to further improve the grade of the titanium concentrate， the flotation process was used to conduct a sorting test under laboratory conditions. Under the condition of the dosage of 100 g·t^-1 of agent， the qualified titanium concentrate with TiO₂ content of 49.1% can be finally obtained though a coarse， a fine， and a second sweep flotation process. Through the above-mentioned experimental research and analysis， it is confirmed that the ilmenite adopts a feasible combined process magnetic-gravity-floating process flow， and can obtain the concentrate with qualified grade requirements.