Title:
METHOD FOR PRODUCING ALUMINUM OXIDE USING SLAG METALLURGY TECHNOLOGY
Document Type and Number:
WIPO Patent Application WO/2022/156076
Kind Code:
A1
Abstract:
A method for producing aluminum oxide using a slag metallurgy technology, relating to the field of comprehensive utilization of aluminum-containing mineral resources, slag metallurgy, and aluminum oxide production. The method comprises: adding the high-calcium oxide metallurgical slag, aluminum ore, a reducing agent, and a component to a melt reactor, maintaining a molten state, and compounding, in the slag, the following relations being satisfied: the molar ratio of CaO to Al2O3 being greater than 1.6; the mass ratio of CaO to SiO2 being 3.0-5.0; blowing an oxidizing gas, and performing slag bath melt reduction; after reduction, performing slag-iron separation to obtain a liquid iron at the lower layer, performing steelmaking on same to obtain the molten steel slag, and returning same to the melt reactor; and cooling the calcium aluminate slag at the upper layer, adding a Na2CO3 solution, introducing CO2 to obtain Al(OH)3, and calcining same to obtain aluminum oxide. The method has the characteristics of strong raw material adaptability, low energy consumption, small flux CaO consumption, multi-component recovery, no solid waste discharge, short process, low cost, environmental friendliness, etc., and realizes recovery and production of aluminum components in the high-calcium oxide metallurgical slag and the aluminum ore.
Inventors:
ZHANG LI (CN)
ZHANG YONGLING (CN)
ZOU XIN (CN)
ZHANG WEI (CN)
ZHANG YONGLING (CN)
ZOU XIN (CN)
ZHANG WEI (CN)
Application Number:
PCT/CN2021/086846
Publication Date:
July 28, 2022
Filing Date:
April 13, 2021
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C01F7/16; C21B13/00; C22B7/04; C22B21/00
Foreign References:
| CN106755654A | 2017-05-31 | |||
| CN1424256A | 2003-06-18 | |||
| US4149898A | 1979-04-17 | |||
| CN102851425A | 2013-01-02 | |||
| US20140224069A1 | 2014-08-14 |
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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