Alumina carbon mother liquid processing method
A carbon separation mother liquor and alumina technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of high energy consumption in the firing process, limited application and popularization, and difficulty in realization, so as to save evaporation energy consumption, improve economy, Effect of reduction in sintering energy consumption
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Embodiment 1
[0015] Get 4 liters of industrial carbon fraction mother liquor, stir at 90°C and feed a mixed gas with a concentration of 38% carbon dioxide and air, so that 96% of sodium carbonate in the solution is converted into sodium bicarbonate, then stop the ventilation, and add the original The sodium carbonate solid of 10% sodium carbonate content in the carbon separation mother liquor was stirred for 5 minutes, and the stirring was stopped, and the slurry was separated with a centrifuge to obtain a 3.5% sodium bicarbonate, aluminum hydroxide and franetonite solid mixture, The precipitation rate of sodium bicarbonate in the mother liquor is 91%.
Embodiment 2
[0017] Get 4 liters of industrial carbon fraction mother liquor, stir at 95°C and feed a mixed gas with a concentration of 38% carbon dioxide and air, so that 99% of sodium carbonate in the solution is converted into sodium bicarbonate, then stop the ventilation, and add the original The sodium carbonate solid of sodium carbonate content 15% in the carbon separation mother liquor was stirred 5 minutes, stopped stirring, and this slurry was separated with the centrifuge and obtained the sodium bicarbonate, aluminum hydroxide and frasonite solid mixture that attached water was 5.5%, The precipitation rate of sodium bicarbonate in the mother liquor is 96%.
Embodiment 3
[0019] Get 4 liters of industrial carbon fraction mother liquor, stir at 85°C and feed a mixed gas with a concentration of 38% carbon dioxide and air, so that 95% of sodium carbonate in the solution is converted into sodium bicarbonate, then stop the ventilation, and add the original The sodium carbonate solid of sodium carbonate content 12% in the carbon separation mother liquor was stirred 5 minutes, stopped stirring, and this slurry was separated with the centrifuge and obtained the sodium bicarbonate, aluminum hydroxide and the frasonite solid mixture that attached water was 4.2%, The precipitation rate of sodium bicarbonate in the mother liquor is 93%.
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