Patent ID: 9725361
Date: 2017-08-08
CPC Classifications: C01F,C01P,C04B

Claim:
1. A method for the wet slaking of calcium and magnesium oxides of a calco-magnesian compound, comprising the steps of: feeding a calco-magnesian compound containing MgO into a slaking equipment; feeding an aqueous slaking phase into the said slaking equipment; and slaking the said calcium and magnesium oxides of the said calco-magnesian compound fed into the said slaking equipment, with the said aqueous slaking phase, leading to the formation of slaked solid particles of calcium and magnesium hydroxides, wherein the said slaking is performed at ambient pressure in the presence of an additive selected from the group consisting of water-soluble metal hydroxides, water-soluble metal silicates, water-soluble aluminates, water-soluble aluminium salts, water-soluble metal halides, water-soluble metal nitrates, water-soluble metal lactates, water-soluble ammonium salts, ammonia and the mixtures thereof, the said calcium and magnesium oxides of the calco-magnesian compound having a magnesium oxide content of at least 10% by weight and less than 50% by weight relative to the weight of the said calco-magnesian compound, and having a calcium/magnesium molar ratio of between 0.8 and 1.2.