The invention discloses a method for preparing
cow dung /
coal gangue compound
biomass fuels, which belongs to the utilization filed of wastes, and aims to the problems that
dairy farming in our country rapidly develops at present, a lot of
cow dung is produced, and pollutes environment, a traditional
cow dung treatment method is easy to produce infectious diseases, low in use ratio and high in cost. Fresh cow dung is dipped in acids to remove parts of
metal impurities firstly, and then is mixed with
calcium hydroxide, improves
combustion value through protection of
hydrogen, then is mixed with activated modified
coal gangue to ferment, and then is deeply transformed through microorganisms, thereby preparing the cow dung /
coal gangue compound
biomass fuels with high calorific value and long burning time. The cow dung /
coal gangue compound
biomass fuels which are prepared through the method for preparing the cow dung /
coal gangue compound
biomass fuels are higher than common coals 25-35% in burning speed through examples testify, gas which is discharged from chimneys is detected without harmful gas, and the
combustion heat value is 22000-26000kJ / kg.