采用H2O2-H2SO4梯度超声电解浮选法脱除煤中硫分和灰分的研究OACSTPCD

A comparative study on sulfur and ash removal from coal from Xinjiang Kuche mine using both one-step sonoelectrochemical method with flotation and gradient sonoelectro-chemical method with flotation was conducted.Various characterization methods,including FT-IR,XPS,XRD,BET and XRF,were used to analyze the alterations in functional groups,differ-ent forms of sulfur,mineral content and pore structure in the coal samples,and the main compo-nents in coal ash.The results indicate the greater effectiveness of the gradient sonoelectrochemi-cal method with flotation in comparison to the one-step sonoelectrochemical method with flota-tion for sulfur and ash removal.When using H2O2-H2SO4 gradient sonoelectrochemical method with flotation,the desulfurization ratio and deashing ratio exhibite significant improvements,in-creasing to 55.38％and 56.75％,respectively.During the electrolysis process,the different forms of sulfur in coal are oxidized into water-soluble sulfur ions by hydroxyl radicals.As differ-ent electrolytes exhibit distinct redox pathways,a step-by-step approach utilizing different elec-trolytes for coal electrolysis can enhance the sulfur and ash removal effect in coal.Additionally,by leveraging the contrasting hydrophilic and hydrophobic properties of coal and minerals,using a floating method for coal treatment can effectively reduce the mineral contents in coal.