Effect of a cyclonic flotation column on the separation of magnesium from phosphate ore

Mining Science and Technology (China) Pub Date : 2011-09-01 DOI:10.1016/j.mstc.2011.10.009

Li Guosheng, Liu Jiongtian, Cao Yijun, Wang Dapeng

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引用次数: 16

Abstract

This study was performed to investigate the effects of the cyclonic separation mechanism on the removal of magnesium from phosphate ore. An analysis of the particle-bubble collision mechanism in a cyclonic force field was used to design two different pulp circulation systems for a cyclonic-static micro-bubble flotation column (FCSMC). Experiments comparing the two conditions were then conducted. Size analysis of the feed and separated products was conducted with a BXF cyclone size analyzer. The results show that about 34.60% of the total MgO content in the feed exists in the −10 μm fraction. This demonstrates that magnesium removal from phosphate ore has the characteristics of a micro-fine particle flotation problem. Under conditions of cyclonic circulation the MgO level of the concentrate is 1.74%, which is lower than that obtained from the column operated in direct-flow circulation by 0.34%. These results indicate that the cyclonic circulation mechanism of the FCSMC can promote removal of micro-fine particles containing magnesium. This is attributed to the function of surface flotation and to the reduction of the lower separation limit under conditions of cyclonic circulation.

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旋流浮选柱对磷矿石中镁分离的影响

为研究旋流分离机制对磷矿石中镁的脱除效果，采用旋流-静态微泡浮选柱(FCSMC)两种不同的矿浆循环系统设计了旋流-静态微泡浮选柱。然后进行了两种条件下的对比实验。采用BXF旋风粒度分析仪对进料和分离产物进行粒度分析。结果表明:进料中约34.60%的MgO含量存在于−10 μm馏分中;说明磷矿除镁具有微细粒浮选问题的特点。在旋风循环条件下，精矿的MgO含量为1.74%，比直接流动循环条件下的MgO含量低0.34%。结果表明，fsmc的旋流循环机制可以促进含镁微细颗粒的去除。这是由于表面浮选的作用和在旋流循环条件下分离下限的降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Mining Science and Technology (China)

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