90results about How to "Reduce evaporation energy consumption" patented technology

The invention provides an alumina carbon mother liquid processing method, which relates to an alumina production process by a serial connection method or a sintering method. The invention is characterized in that the process comprises the following steps: (1) introducing carbon dioxide gas into the alumina carbon mother liquid so that all remained alumina can be separated out after the alumina carbon mother liquid is carbonated, and continuously introducing the carbon dioxide for converting the sodium carbonate in the carbon mother liquid into sodium bicarbonate; (2) adding the sodium carbonate into the over carbonated sodium bicarbonate solution so that the separation rate of the sodium bicarbonate reaches more than 90 percent; and (3) separating slurry after the separation of the sodiumbicarbonate to obtain a mixture of the sodium bicarbonate, the aluminum hydroxide and the dawsonite with the attached water weight lower than 6 percent to be used for preparing raw material slurry. In the method of the invention, the carbon evaporation mother liquid with 220g / l sodium carbonate is converted into sodium bicarbonate crystals with the moisture content lower than 6 percent, the evaporation energy consumption is saved, in addition, the raw material moisture is reduced by 20 percent, and the energy consumption of the raw material sintering can be reduced by 40 percent.