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Ambient Temperature Flotation of Sedimentary Phosphate Ore Using Cottonseed Oil as a Collector,Minerals
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The mid-low grade sedimentary phosphate ore, abundant in silicate and carbonate gangue minerals, exhibits a poor processability. It is conventionally enriched using high temperature flotation to remove silicate gangues with fatty acid as a collector. Cottonseed oil has been proved to be an efficient collector for achieving ambient temperature flotation of the sedimentary phosphate ore used in this study. Flotation kinetics was investigated to ascertain the excellent collecting performance of cottonseed oil, as compared with oleic acid, and the phosphate flotation fitted well with the first-order flotation model. Based on the analysis of flotation reagent effect on the direct flotation process using the response surface methodology (RSM), a closed circuit of direct-reverse flotation for stepwise removing silicate and carbonate gangues from the sedimentary phosphate ore was established. Consequently, a required high quality of phosphate concentrate containing 30.16% P2O5 was obtained, with a recovery of 90.90%. Scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD) of the flotation products confirmed that the majority of silicate and carbonate gangues were effectively removed from the concentrate products.
中文翻译：
富含硅酸盐和碳酸盐脉石矿物的中低品位磷酸盐磷酸盐矿，加工性能较差。通常使用高温浮选法进行浓缩，以脂肪酸为捕集剂去除硅酸盐脉石。棉籽油已被证明是一种有效的捕收剂，可用于本研究中使用的沉淀磷酸盐矿石的室温浮选。为了确定棉籽油与油酸相比的优异收集性能，对浮选动力学进行了研究，并且磷酸盐浮选与一级浮选模型非常吻合。基于响应面方法（RSM）分析了浮选剂对直接浮选过程的影响，建立了用于从沉积磷酸盐矿中逐步去除硅酸盐和碳酸盐脉石的直接-反向浮选闭路系统。因此，需要高质量的含磷30.16％的磷酸盐精矿获得2 O 5，回收率为90.90％。浮选产品的扫描电子显微镜（SEM）和X射线衍射分析（XRD）证实，大部分硅酸盐和碳酸盐脉石已从精矿产品中有效去除。 |
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