Discussion on Rational Ways for Coal Gangue Treatment and Utilization

Optimum principles we should follow in processing and utilizing coal gangue are proposed,which are discharge reduction,reutilization, recycling,suitability,economic and environment benefit.The classification of coal gangue and analysis of physicochemical property and mineral component are the basic tasks for rationally utilizing the coal gangue.While rock type,organic carbon content,sulfur content,Al2O3/SiO2 ratio,Fe2O3 content,CaO and MgO content etc.are necessary indexes for the classification.Different purposes of using the coal gangue have different requirements in components and different ways of processing and utilizing coal gangue consume different volumes of resources.According two indexes,the ecological footprints occupied in processing a unit volume of coal gangue and the ecological footprints occupied by obtaining per million Yuan of economic benefit,we have found out the rational utilization approach of coal gangue for Xuzhou Mining Area: the economic profit of coal gangues with a heating value of 2 100~4 200 kJ/kg is better in electricity generating than brick making.