改性含钛高炉渣中钙钛矿浮选分离工艺研究

为了实现攀钢含钛高炉渣中钛组分的有效回收,对其进行了化学组分的调整和高温选择性析出处理,在此基础上,进行了改性渣中主要矿物的浮选、人工混合矿浮选、改性渣浮选等研究。结果表明,辛基异羟肟酸(OHA)对三种矿物表现出一定的捕收能力和选择性;捕收剂与抑制剂用量对浮选效果未有明显效果,且耗酸量较大;通过SEM和EDX分析表明,各矿物表面被针状硫酸钙覆盖导致捕收剂与抑制剂对矿物的作用效果减弱,因此需要寻求较为有效的表面处理剂对改性渣处理后再进行浮选分离。

Study on the Flotation Separation of Modified Ti-bearing Blast Furnace Slag

In order to achieve the high-efficiency recovery of titanium component in the titanium-blast furnace slag,the slag had been modified in terms of its chemical compositions and treated through the process of high temperature selective precipitation.The maximum crystal size and quantity of the resulted pervoskte was 63.17 μm and 30.62％,respectively.Based on the previous results,the study on the flotation of the modified slag had been carried out,including the effect of OHA dosage and sodium silicate dosage.It is found out that the OHA dosage and sodium silicate dosage do not affect the flotation obviously.SEM and EDX analysis show that the CaSO4 micro-precipitate covers the surfaces of the minerals,which decreases the effect of OHA and sodium silicate.Therefore,the effective surface treatment agents should be developed to preprocess the modified slag prior to flotation separation.