FREMGANGSMAATE TIL FREMSTILLING AV EN VANDIG SUSPENSJON AV KALSIUM- OG MAGNESIUMKARBONAT

1. A method of producing an aqueous suspension of carbonates of calcium or/and Magnesium from dolomite, wherein the dolomite is converted into a mixture of calcium oxide and magnesium oxide by heating to approx. 1000-1100 degrees C, whereafter the resultant oxide mixture is suspended in water in the proportion by weight of at least 20 parts of water to 1 part of the oxides and wherein the hydroxides which form in the suspension are converted back to the corresponding carbonates by the introduction of carbon dioxide according to DE-A-26 00 485 characterized by that the carbonate-containing suspension is heated to a temperature above 160 degrees C in a pressurized vessel suitable for hydrothermal treatment and maintained at such temperature until lamellar, basic magnesium carbonates of a Shape factor of less than 1 : 30 have formed.