| 摘要 |
A composition comprising at least one calcium-magnesium compound fitting the formula aCaCO3.bMgCO3.xCaO.yMgO.zCa(OH)2.tMg(OH)2.uI, wherein I represents impurities a, b, z, t and u each being mass fractions ≧0 and ≦̸50%, x and y each being mass fractions ≧0 and ≦̸100%, with x+y≧50% by weight, based on the total weight of said at least one calcium-magnesium compound, which is in the form of particles, said composition having an calcium and magnesium accrued content in the form of oxides, greater than or equal to 20% by weight and being in the form of compacts, each compact being formed with said compacted and shaped particles of calcium-magnesium compounds, said compacts having a Shatter Test Index of less than 10% allowing very good resistance to falling and good resistance to ageing, manufacturing method and use thereof. |
