煤油辅助十二胺浮选尖山铁矿实验

本文从药剂组合的理念出发，以煤油作为辅助捕收剂部分替代价格昂贵的十二胺，配制不同组成的十二胺-煤油混溶捕收剂，研究了该药剂的对尖山铁矿以及石英纯矿物的分选规律，通过显微图像分析了混溶捕收剂的作用机理，并通过闭路流程实验与传统药剂十二胺进行了对比。结果表明：混溶捕收剂中十二胺的较佳比例为40%，在这个比例下，煤油的增效效果最明显；煤油的加入强化了细粒石英的聚团过程显著提高了细粒级石英的回收率；通过闭路流程实验，以十二胺-煤油作为捕收剂，可以得到TFe品位68.57%，回收率96.72%的铁精矿。与传统阳离子捕收剂十二胺相比，十二胺-煤油选择性更优兼具经济效益，具有良好的应用价值。

Experimental Study on Flotation of Jianshan Iron Using DDA Assisted with Kerosene

In this study, a comparison of traditional cationic collector dodecylamine (DDA) and miscible DDA-Kerosene to the flotation performance of Jianshan ore was discussed based on the concept of reagent combination that kerosene was used as the auxiliary collector and partly replaced expensive DDA. To explore the relationship between DDA-Kerosene composition and mineral flotation performance on the reverse flotation of Jianshan ore, the characteristics of the flotation product were analyzed. The results showed that the floatability of the floating material increased with the DDA consumption increased. Specifically, during the flotation process, the fine quartz (-0.074 mm fraction) would selectively float with DDA-Kerosene. The results showed that the optimal ratio of dodecylamine was 40%, and kerosene had the most obvious effect. The addition of kerosene significantly increased the recovery of fine -0.038 mm quartz. Through the closed-circuit process test, using dodecylamine and kerosene as the collector, the iron concentrate with TFe grade of 68.57% recovery rate of 96.72% can be obtained. DDA-Kerosene with the characteristic of better selectivity and economy had a good application value in the future.