北方某铁尾矿浮磷试验研究

Experimental study on phosphorus flotation of an iron tailings in northern China

北方某选铁尾矿含P_(2)O_(5)2.93%,多数为晶质磷灰石,属于低品位磷资源。为了实现铁尾矿中磷的高效回收,针对其性质特点,进行了浮磷试验研究,并分析了主要因素的影响。最终,在最佳条件下(以氧化石蜡皂为捕收剂,用量为1200 g/t;碳酸钠为pH调整剂,用量为2000 g/t;水玻璃为抑制剂,用量为200 g/t)采用“一粗—三精”的大开路小闭路流程,获得了理想的技术指标,磷精矿含P_(2)O_(5)达33.19%、回收率达82.98%。

An iron tailings in the northern China contains 2.93%P_(2)O_(5),most of which is crystalline apatite and belongs to low-grade phosphorus resources.In order to realize the efficient recovery of phosphorus in the iron tailings,the experimental study on phosphorus flotation was carried out according to its characteristics,and the influence of main factors was emphatically analyzed.Finally,the optimal conditions were obtained using oxidized paraffin soap as the collector with the amount of 1200 g/t,sodium carbonate as the pH adjusting agent with a dosage of 2000 g/t and water glass as the inhibitor with the amount of 200 g/t.The ideal technical index was obtained with the P_(2)O_(5)content of 33.19%in the phosphate concentrate and the recovery rate of 82.98%under the large open and small closed circuit process with"one coarse-three fine".