Dissertation > Industrial Technology > Chemical Industry > Inorganic compounds, the chemical industry of the metal elements > Section III group metal elements of inorganic compounds > Aluminum inorganic compounds

Depth Treatment of Carbonation Liquor in the New Process of Alumina Production

Author WangHongMei
Tutor WanPingYu
School Beijing University of Chemical Technology
Course Chemistry
Keywords Carbon mother liquor Electrochemical Measured silicon Desilication Impurity Measured aluminum
CLC TQ133.1
Type Master's thesis
Year 2011
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Rich bauxite resources in China , but the taste is not high , silicon , aluminum-silicon ratio is low , caused by the high operating costs of China 's alumina industry , international competitiveness is weak, is not conducive to the survival and development of the industry . We are investigating the alkali dissolution - carbon points alumina production of new technology designed to improve the alumina production efficiency and reduce the quality requirements of the bauxite and alumina industry in China to improve production efficiency and international competitiveness . New technology - carbon points alumina production of alkali-soluble , membrane electrolysis of sodium carbonate decomposition of sodium bicarbonate and sodium hydroxide step is the key to the entire process . How to economically and effectively remove the carbon stars impurities in the mother liquor , effectively extending the life of the cationic membrane , so that the tank voltage to maintain a lower value and stable , it is essential . Whereby this thesis, to solve the following problems : 1 , high salt concentrations , the method for determination of trace silicon in the presence of a large number of impurity ions , accurate determination of the carbon sub- 60% of the mother liquor in silicon content ; 2 , Carbon the mother liquor of the depth of the 60% ??success depth desilication , greatly improving the the silicon volume index , thereby improving the quality of alumina production ; established electrochemical method for the determination of aluminum content in high salt concentrations , and provides for subsequent impurity great might ; , the design structures electrochemical device , which can effectively remove impurities in the mother liquor carbonation the membrane electrolysis depth impurity requirements , greatly reducing the cost of production , affordable .

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