Title:
METHOD FOR PREPARING SODIUM ALUMINATE BY TREATING BAYER RED MUD BY USING ONE-STEP ALKALI HEAT PROCESS OF ANDRADITE
Document Type and Number:
WIPO Patent Application WO/2018/233690
Kind Code:
A1
Abstract:
A method for preparing sodium aluminate by treating bayer red mud by using a one-step alkali heat process of andradite. The method comprises the following steps: S1: mixing red mud, sodium ferrite or calcium ferrite, active lime and a circulating mother liquid to prepare raw material mineral pulp; S2: allowing the raw material mineral pulp to carry out an alkali heat dissolution reaction to obtain dissolved-out mineral pulp; S3: diluting the dissolved-out mineral pulp to obtain a diluted solution, carrying out liquid-solid separation to obtain dissolved-out slag and a dissolved-out solution; S4: evaporating the dissolved-out solution, adding seed crystals, crystallizing and carrying out solid-liquid separation to obtain a sodium aluminate solid and a high-molecular-ratio sodium aluminate solution; and S5: blending the high-molecular-ratio sodium aluminate solution to prepare the circulating mother liquid used in step S1.
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Inventors:
YU HAIYAN (CN)
PAN XIAOLIN (CN)
WU YAN (CN)
BI SHIWEN (CN)
PAN XIAOLIN (CN)
WU YAN (CN)
BI SHIWEN (CN)
Application Number:
PCT/CN2018/092427
Publication Date:
December 27, 2018
Filing Date:
June 22, 2018
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C01F7/04; C01F7/066; C01B33/20
Foreign References:
| CN107244683A | 2017-10-13 | |||
| CN101054626A | 2007-10-17 | |||
| CN101117230A | 2008-02-06 |
Attorney, Agent or Firm:
BEIJING EASY JOY SOON IP AGENT LTD (CN)
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