Let’s talk about light calcium and heavy calcium first: Generally speaking, light calcium comes from a chemical reaction due to the processing method (the process is that calcium carbonate ore is incinerated into calcium oxide, water is added to form calcium hydroxide, and carbon dioxide is added to form calcium carbonate). Higher and whiter, the particles have several crystal forms on the microscopic level; heavy calcium is directly ground from ore, generally speaking, there are more impurities (such as iron oxide, magnesium oxide, etc.), and the color is darker, not as white as light calcium, particles The shape is mostly spherical.
Both light calcium and heavy calcium can be activated and processed into live calcium. After the calcium carbonate is activated, the surface properties are somewhat changed. If it is only treated with some surfactants, such as stearic acid, the surface energy of small calcium carbonate particles can be reduced, and the tendency of particles to agglomerate is reduced, which is convenient for its dispersion in the product; if it is treated with a coupling agent, It can increase the interaction between calcium carbonate and organic resin, and improve the material properties of the overall plastic.
Heavy calcium carbonate is referred to as heavy calcium, and the English abbreviation is GCC. It is obtained by directly crushing natural calcite, limestone, chalk, shells, etc. by mechanical methods. Because the sedimentation volume of heavy calcium carbonate is smaller than that of light calcium carbonate, it is called heavy calcium carbonate.
Light calcium carbonate is referred to as light calcium, also known as precipitated calcium carbonate, and English abbreviated as PCC. calcium carbonate), and then carbon dioxide is introduced to carbonize lime milk to form calcium carbonate precipitation, which is finally obtained by dehydration, drying and pulverization. Or first use sodium carbonate and calcium chloride to carry out a metathesis reaction to generate calcium carbonate precipitate, and then dehydrate, dry and pulverize it. Because the sedimentation volume of light calcium carbonate (2.4-2.8mL/g) is larger than that of light calcium carbonate (1.1-1.4mL/g), it is called light calcium carbonate.
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