It is feasible to produce heavy carbonic acid from stone waste. There are many production cases in China now. Heavy calcium carbonate, referred to as heavy calcium. It is made of natural carbonate minerals such as calcite, marble and limestone. Calcium carbonate powder is used as inorganic filler. It has the advantages of high chemical purity, great inertia, not easy chemical reaction, good thermal stability, no decomposition below 400℃, high whiteness, low oil absorption rate, low refractive index, soft, dry, no crystal water, low hardness, small abrasion value, non-toxic, tasteless, odorless, good dispersion and so on. The application prospect of heavy calcium carbonate powder is very broad.

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