【摘要】 本文研究了在O2／CO2气氛下石灰石的煅烧和烧结特性。结果表明,空气气氛下煅烧所得CaO的孔隙率和比表面积均较O2／CO2气氛下的大,但O2／CO2气氛下煅烧所得CaO具有更大的最可几孔径。石灰石在O2／CO2气氛下1000℃煅烧时的产物具有最大的比孔容积和比表面积,且石灰石煅烧产物CaO的比孔容积和比表面积均随气氛中CO2浓度的增加而下降,在低CO2浓度下下降较为迅速,而在高CO2浓度下下降逐渐趋于平缓。在延长相同烧结时间的情况下,O2／CO2气氛下CaO孔结构受烧结影响的程度要比空气气氛下轻微。更多还原

【Abstract】 The calcination and sintering of limestone in O2/CO2 atmosphere were investigated. The results show that the specific surface area and the porosity of CaO calcined in air are bigger than that of in O2/CO2 atmosphere, but the latter has bigger average pore radius and surface area than the former. The peaks of the specific surface area and the porosity of CaO calcined in O2/CO2 atmosphere appear at 1000℃. They decrease with increase in CO2 concentration, drop rapidly in low CO2 concentration, but slowly in high CO2 concentration. When increasing the same sintering time, the effect of sintering on the pore structure is less strong in O2/CO2 atmosphere than in air.更多还原