ABSTRACT Indian natural magnesite containing silica and lime as main impurities was beneficiated using reverse froth flotation technique. Pine oil was used as frother, Flotigam EDA as collector and sodium hexametaphosphate as depressant of carbonate group. Operating parameters were optimized using response surface methodology and a quadratic model equation was formulated for the experiment. The effect of different process parameters was studied using Box-Behnken design. Statistical analysis suggested that the model was significant. Moreover, optimum process conditions were predicted after analyzing the experimental data. The beneficiated sample for which the highest silica in froth was achieved was characterized in terms of X-ray diffraction analysis. Further, quantification of the crystalline phases showed that amount of quartz was reduced from 2.3% in raw sample to 1.8% in processed sample. GRAPHICAL ABSTRACT

中文翻译：

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天然菱镁矿反浮选及响应面法工艺优化

摘要 印度天然菱镁矿主要杂质为二氧化硅和石灰，采用反泡沫浮选技术进行选矿。松油作起泡剂，Flotigam EDA 作捕收剂，六偏磷酸钠作碳酸酯基抑制剂。使用响应面方法优化了操作参数，并为实验制定了二次模型方程。使用 Box-Behnken 设计研究了不同工艺参数的影响。统计分析表明该模型是显着的。此外，在分析实验数据后预测了最佳工艺条件。在 X 射线衍射分析方面表征了泡沫中二氧化硅含量最高的精选样品。此外，结晶相的量化表明石英的量从 2 减少。原始样品中的 3% 至加工样品中的 1.8%。图形概要