Reverse Flotation for Improving Quality on Magnetic Concentrate of Low-grade Hematite Ore from Anqian
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摘要:
以鞍千贫赤铁矿石的磁选精矿为研究对象，采用醚胺类复配捕收剂DLT-Ⅰ和改性淀粉抑制剂DLT-Ⅱ，开展反浮选条件优化试验研究。结果表明，适宜的矿浆pH值为9.0，捕收剂DLT-Ⅰ用量为125 g/t，抑制剂DLT-Ⅱ用量为300 g/t。在单因素条件试验的基础上，经一粗一精三扫的浮选闭路试验，获得了浮选精矿TFe品位67.01%、回收率93.70%的技术指标，尾矿TFe品位为15.28%，为鞍千贫赤铁矿石的高效开发利用提供了借鉴。
Abstract:The reverse flotation condition test was carried out on the magnetic concentrate of low-grade hematite ore from Anqian by using the ether amine-based compound collector DLT-Ⅰ and the modified starch depressant DLT-Ⅱ. The suitable chemical system was determined to be the pulp pH value of 9.0, the collector DLT-Ⅰ dosage of 125 g/t, and the depressant DLT-Ⅱ dosage of 300 g/t. Based on the conditional tests, the technical indexes of the flotation concentrate with the TFe grade of 67.01%, the iron recovery of 93.70%, and the tailings grade of 15.28% was obtained by the process of the reverse flotation closed process of one roughing-one cleaning-three scavenging, which provided a reference for the efficient development and utilization of low-grade hematite ore from Anqian.
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Key words:
- magnetic concentrate /
- reverse flotation /
- collector /
- depressant
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表 1 磁选精矿的主要化学成分
/% Table 1. Chemical components of the magnetic concentrate
Composition TFe FeO SiO2 Al2O3 CaO MgO P S Contents 55.23 1.64 20.47 0.41 0.17 0.39 0.014 < 0.004 
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