In this paper, an attempt is made to recover vitrinite-rich fraction coal using batch flotation operation. Three important operational variables, viz. collector dose (kg/ton), frother dose (kg/ton), and feed solid concentration, (%) have been changed according to Box–Behnken factorial design and their effect on the response parameter like yield, ash, and vitrinite maceral recovery (vmr) percent has been evaluated. For understanding the influence of interactional effects, response surface methodology (rsm) approach has been adopted. From 69.23 to 99.98 of volume percentage of vitrinite maceral is recovered, when the flotation test is performed without addition of collector with frother level maintained at 0.75 kg/ton of coal keeping feed solid concentration fixed at 5% solid by weight. High value of R² greater than 90% is obtained for model equations of yield, ash, and vmr. Minitab 16.0 statistical software was used for data analysis.

本文尝试通过分步浮选法回收富含镜质的馏分煤。三个重要的操作变量，即。收集器剂量（kg /吨），起泡剂剂量（kg /吨）和饲料固体浓度（％）已根据Box–Behnken因子设计进行了更改，并且它们对响应参数（如产量，灰分和镜质软化）的影响（vmr）百分比已评估。为了理解交互作用的影响，已采用响应面方法（RSM）。当在不添加捕收剂的情况下进行浮选试验时，浮选水平保持在0.75千克/吨煤，并保持进料固体浓度固定在5％固体重量时，从69.23至99.98％的钙铁矿黄石的体积百分含量得以回收。高R ²值对于屈服，灰分和vmr的模型方程，可获得大于90％的结果。Minitab 16.0统计软件用于数据分析。