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Mineral composition based on a mixed solid phase of calcium and magnesium carbonates and procedure for preparing said composition

机译:基于碳酸钙和碳酸镁的混合固相的矿物组合物和制备所述组合物的方法

摘要

Process for preparing a mineral composition based on a mixed solid phase of calcium and magnesium carbonates, comprising a preparation, in an aqueous phase, of a suspension of a solid phase containing at least one calcium compound selected from calcium hydroxide, calcium carbonate and mixtures thereof and at least one magnesium compound selected from magnesium oxide, magnesium hydroxide, at least partially hydrated dolomite, and mixtures thereof, the weight of said solid phase being between 5% and 15% of the total weight of the suspension, a carbonation of said solid phase in suspension by injecting a gas containing CO2 into said suspension that is heated at a temperature of 55° C. to 90° C., at a flow rate of CO2 of 2.5 to 15 dm3/min/kg of said solid phase of the suspension, with a reduction of the pH of the suspension to a value of less than 9 and with a stabilization of the electrical conductivity of the suspension, the carbonation being stopped as soon as this stabilization of electrical conductivity is observed.
机译:基于碳酸钙和碳酸镁的混合固相的矿物组合物的制备方法,包括在水相中制备包含至少一种选自氢氧化钙,碳酸钙及其混合物的钙化合物的固相悬浮液。以及至少一种选自氧化镁,氢氧化镁,至少部分水合的白云石及其混合物的镁化合物,所述固相的重量为所述悬浮液总重量的5%至15%,通过向所述悬浮液中注入含CO2的气体注入悬浮液,该气体在55°C至90°C的温度下以2.5-15 dm3 / min / kg的固相的二氧化碳流量进行加热悬浮液,将悬浮液的pH值降低至小于9并稳定悬浮液的电导率,一旦稳定,则停止碳酸化观察到垂直导电性。

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