Process for decarbonation of carbonated materials and hydration thereof and device thereof

A process for decarbonation of limestone, dolomite or other carbonated materials and hydration of the decarbonated limestone, dolomite or other carbonated materials, the process comprising:

• heating particles of carbonated materials in a reactor of a first circuit up to a temperature range in which carbon dioxide of the carbonated materials is released to obtain decarbonated particles comprising either CaO, MgO, or both CaO and MgO;
• conveying the particles of carbonated materials by a first entraining gas in the first circuit for preheating the carbonated materials, said the first gas comprising the released carbon dioxide, a composition of the first gas being substantially free of nitrogen;
• separating, the carbonated particles from a flow of the first entraining gas;
• transferring the decarbonated particles to a second circuit, in which a second gas circulates, the second circuit comprising a hydration section;
• hydrating the decarbonated particles in contact with water as either liquid, steam, or both liquid and steam, in the hydration section to obtain hydrated particles comprising either Ca(OH)2, Mg(OH)2, or both Ca(OH)2 and Mg(OH)2;
• transferring at least a portion of heat generated by the hydration of the decarbonated particles to the second gas;
• and
• one or more of:
• i. discharging the second gas to the atmosphere at an outlet of the second circuit,
• ii. supplying the reactor with the second gas, or
• iii. supplying with the second gas at least one heat recovery element configured to:
• preheat and dry one or both of carbonated materials or fuel,
• dry hydrated products
• provide a heat source for a gas treatment process,
• generate mechanical work, or
• generate electricity, utilizing the heat of the second gas.