碳酸钙矿石晶粒尺寸对其受热后状态的影响

The effect of the grain size of calcium carbonate mineral on its heated state

为研究不同晶粒的碳酸钙矿石用于造渣的优劣性,对6种晶粒不同的碳酸钙矿石进行了X射线衍射、压汞、扫描电镜分析等试验,研究了它们的晶粒尺寸、碎裂程度、碎裂过程和煅烧后的比孔容、体积密度、孔隙率、平均孔径、活性度等因素,分析了矿石晶粒尺寸对其热裂性和煅烧所得石灰的微观结构参数、活性的影响。结果表明,矿石晶粒度越大,煅烧所得石灰越疏松多孔,活性越高,在急速受热时会发生爆裂,化渣速度更快。

In order to research the advantages and disadvantages of the ores used to make slag which have different grain sizes,six kinds of calcium carbonate minerals which have different grains are studied by X-ray diffraction,mercury,scanning electron microscopy and other analytical methods.It analyzes the grain size,the extent of fragmentation,fragmentation processes of the ore,and the ratio of pore volume,the bulk density,porosity,average pore size,activity and other factors of the lime.It researches the effects of grain size of the ore on its thermal cracking and microstructure parameters,activity of lime which is calcined.It concludes that the larger the grain size of the ore,the higher activity and more porous of lime which is calcined.When heated rapidly,the ore which has larger grain size will burst and slagging faster.