| Reverse Flotation of Natural Magnesite and Process
Optimization Using Response Surface Methodology |
Chandrima Ghosh,a, b, * Somnath Sinhamahapatra,a Himansu Sekhar Tripathia and Ujjaini Sarkarb
Pages : 23-29
DOI : 10.1080/0371750X.2019.1699864 |
| 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.
[Keywords: Magnesite, Beneficiation, Froth flotation, Optimization, Response surface
methodology, Phase analysis] |
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