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Title:
ENVIRONMENTALLY FRIENDLY TREATMENT METHOD OF REFINING MAGNESIUM SLAG
Document Type and Number:
WIPO Patent Application WO/2015/157884
Kind Code:
A1
Abstract:
An environmentally friendly treatment method of refining magnesium slag, comprising the following steps: step a, fusing and screening the magnesium slag to obtain magnesium granules and magnesium slag crude solution; step b, removing moisture from the filtrate produced by filtering the magnesium slag crude solution screened in step a, to obtain combined chlorine salt; step c, employing ammonium sulfate to dissolve the filter residues produced after filtration in step b, and, after magnesium deposition reaction and post-treatment, obtaining high-purity magnesium oxide. The method innovatively solves the problem of recovering, treating, and refining magnesium slag, with a high recovery rate higher than 90%, while greatly reducing solid waste discharge and the pollution thereof to the environment; in addition, the recovered products can be reused and have high purity, thus significantly reducing pollution to the environment and meeting requirements of energy conservation and emission reduction.

Inventors:
TAN HEYI (CN)
TANG LUNYUAN (CN)
Application Number:
PCT/CN2014/075237
Publication Date:
October 22, 2015
Filing Date:
April 14, 2014
Export Citation:
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Assignee:
TAN HEYI (CN)
International Classes:
C22B26/22; B09B3/00; B28B1/00; C21C7/064; C22B26/20
Foreign References:
CN101704010A2010-05-12
CN102424916A2012-04-25
CN1140765A1997-01-22
Other References:
YANG, DINGMING ET AL.: "Study on Preparation of Magnesium Hydroxide from Bitter Earth-Ammonium Sulfate by Circulation Method", MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES, 28 February 2001 (2001-02-28), pages 9 - 11, ISSN: 1000-6532
ZONG, JUN ET AL.: "Research on Preparation Process of Magnesia from Bitter Earth-Ammonium Sulfate", INORGANIC CHEMICALS INDUSTRY, 1 April 1991 (1991-04-01), pages 7 - 10, ISSN: 1006-4990
Attorney, Agent or Firm:
SHANGHAI CPTO INTELLECTUAL PROPERTY AGENCY CO.,LTD. (CN)
上海精晟知识产权代理有限公司 (CN)
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