Removal of Impurities from Indigenous (Chamlang) Coal by Using Froth Flotation Technology (original) (raw)

Indigenous (Chamlang) coal possesses excessive concentrations of impurities, such as ash and organic and inorganic sulphur. In the present research froth flotation technique was applied for reducing inorganic sulphur and ash content in coal. Frothing agent, pH, separation time and air velocity were the main parameters employed to reduce ash content in the indigenous coal. The optimum values of flotation parameters by including pH, air velocity and separation time were found to be 7, 90 scf/h and 55 min. Keeping parameters at their optimum values, better quality of coal was obtained by reducing ash and sulphur content to 57 and 50.757% respectivety.