Method for recovering alkali and aluminum in course of treatment of bayer red mud by using calcification-carbonation method

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United States of America Patent

PATENT NO 9963353
SERIAL NO

15303408

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A method for recovering alkali and aluminum during treatment of Bayer red mud using a calcification-carbonation method, including steps of mixing the Bayer red mud with calcium aluminate or with calcium aluminate and lime, performing calcification dealkalization conversion in a high-concentration alkaline liquor, and carbonizing the calcified residues produced during dealkalization to obtain carbonized residues; and then performing low-temperature aluminum dissolution, aluminum precipitation and the like to obtain calcium aluminate products, which is returned to the calcification dealkalization conversion of the red mud for recycling. Part of an alkali-containing and aluminum-containing liquid phase after calcification dealkalization conversion can be used as supplementary alkali in the Bayer production course for recycling. The method is energy-saving and environmentally-friendly, and allows recovering alkali and aluminum from the red mud and harmless treatment of the Bayer red mud.

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NORTHEASTERN UNIVERSITYADMINISTRATIVE BUILDING NO 3-11 WENHUA ROAD HEPING DISTRICT SHENYANG LIAONING 110819

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dou, Zhihe Shenyang, CN 2 0
Liu, Yan Shenyang, CN 392 2674
Lv, Guozhi Shenyang, CN 2 0
Zhang, Tingan Shenyang, CN 1 0
Zhang, Zimu Shenyang, CN 2 0
Zhu, Xiaofeng Shenyang, CN 12 65

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