含镁脉石矿物的选矿降镁研究进展

蛇纹石、绿泥石和滑石等含镁硅酸盐矿物常与有价金属矿物共生，在浮选分离过程中这类脉石矿物难以被抑制，造成精矿镁含量超标而对冶炼产生极大影响，因此如何实现高效选矿降镁是业界亟待解决的难题。本文首先从选矿降镁工艺开发和浮选降镁抑制剂作用机理两方面总结了降镁的研究现状，归纳了常见含镁硅酸盐脉石矿物蛇纹石、绿泥石和滑石的结构及其表面特征，进一步从不同角度分析了含镁脉石难分离和难抑制的原因，对选矿降镁技术的发展趋势作了展望，以期为选矿降镁提供一定的参考和借鉴。

Research Progress on Magnesium Reduction by Mineral Processing of Magnesium-containing Silicate Gangue

Magnesium-bearing silicate minerals such as serpentine, chlorite and talc often coexist with valuable metal minerals, which are difficult to be suppressed in the process of flotation separation, resulting in excessive magnesium content in the concentrate, which has a badly impact on smelting. Therefore, it is urgent issue that how to achieve efficient beneficiation and magnesium reduction for the industry. The research development of magnesium reduction was summarized through investment of process and inhabiting mechanism of depressant of magnesium reduction, and the structure and surface characteristics of serpentine, chlorite and talc were concluded respectively in this paper, which demonstrates the reasons that magnesium-bearing gangues are difficult to separate and inhabit from various aspects further more. At the same time, the development trend of magnesium reduction technology by mineral processing is prospected to provide some reference for other similar mine.