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《Light Metals》 2019-09
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Discussion on the affecting factors of the sodium aluminate solution refining in Zhongmei Aluminum

Li Fengjie;Henan Zhongmei Aluminum Co., Ltd.;  
The affecting factors on the sodium aluminate solution refining are discussed. According to production practice, the contents of iron and titanium have no significant effect on the sodium aluminate solution refining, and silicon, carbon and sulfur have some effects. The solid content in sodium aluminate solution is affected by the fineness of red mud particles and the content of viscous impurities in the solution. The increasing of silicon content in red mud shall increase the fineness of red mud, resulting in more viscous particles, making the remove effect worse of filter cake, the pressure rising, and the the solid content in green liquor exceeding the standard. Carbon in the pregnant liquor mainly affects the content of viscous impurities in sodium aluminate solution. The more organic carbon humic acid, the more viscous impurities, the greater the effect on the refining of sodium aluminate solution. Sulphur has little effect on the refining process of sodium aluminate solution.
【CateGory Index】: TF821
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