Optimization of coal flotation using statistical technique

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• 作者：Naik ; Pradyumna K. ; Reddy ; P.S.R. ; Misra ; Vibhuti N.
• 关键词：Coal ; Flotation ; Statistical design ; Optimization
• 刊名：Fuel Processing Technology
• 出版年：2004
• 期刊代码：36_03783820
• 类别：ce
• 出版时间：September 15, 2004
• 卷：85
• 期：13
• 页码：1473-1485
• 文件大小：145 K

摘要

The flotation studies of non-coking coal fines containing 37.7%ash were carried out. The variables studied were pH, collector, frother, modifier (sodium silicate) and coal size. Experiments were carried out using 2⁵ full factorial design. The main and interaction effects on recovery and grade were evaluated using Yates' analysis. The optimum flotation condition was found by the method of steepest ascent. A product with 72.62%combustibles (i.e. 25.38%ash) at 88.03%recovery was obtained at pH 7.5, diesel oil 0.42 g/kg, MIBC 0.09 g/kg, sodium silicate 0.02 g/kg and coal size −0.6 mm at optimum conditions.