轻质碳酸钙制造应用与现况-中国矿冶工程学会互动式网站.PDFVIP

輕質碳酸鈣製造 、應用與現況 Manufacture, Application and Status of Light Calcium Carbonate 1 2 3 4 W.H. Liu, M.H. Chang, J.Y. Cheng, H.W. Hsu Calcium Carbonate, a versatile inorganic material is commonly applied in papermaking, rubber, plastic, paint s, coating, ink , building material, pharmaceutical, packaging, etc. According to the various manufacturing methods, it can be classified as heavy calcium carbonate, light calcium carbonate, and nano calcium carbonate. Heavy calcium carbonate having particle size 1-5µm is produced by mechanical grinding of limestone, calcite, and chalk. Light calcium carbonate having particle size 0.5-5µm is produced 1~5mm from chemical precipitation. The morphology of the heavy calcium carbonate is mostly irregular-shaped, but light calcium carbonate is 0.5-5mm mostly spindle shaped. Light calcium carbonate has more extensive applications than heavy calcium carbonate as it not only u sed as volumetric filling material, it also used as a functional filling material to increase the physical and chemical characteristics of the product . The five common processes of producing calcium carbonate are as follows: carbonation reaction from calcium oxide, carbonation reaction from calcium chloride, bi-product of producing sodium hydroxide or sodium carbonate, reaction from the waste powder of calcium oxide and hydrogen chloride. In the industry, the carbonation reaction from calcium oxide is the main manufacturing reaction. For carbonation reaction, the manufacturing processes can be classified based on the reactor types: the high-gravity reactor, the