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Title:
METHOD FOR EXTRACTING VALENT COMPONENT IN VANADIUM TITANIUM MAGNETITE BY MEANS OF OXYGEN-RICH SELECTIVE LEACHING
Document Type and Number:
WIPO Patent Application WO/2019/137544
Kind Code:
A1
Abstract:
A method for extracting valent components in vanadium titanium magnetite by means of oxygen-rich selective leaching, comprising the steps of: (1) crushing vanadium titanium magnetite, placing same and a sodium hydroxide solution into an autoclave, introducing oxygen gas, stirring at an elevated temperature, and maintaining the temperature to complete alkali leaching; (2) filtering and separating the alkali leached material, and washing the alkali decomposition product with water to prepare an alkali decomposition slag; (3) adding an ammonium salt to the alkali leached liquid, standing and precipitating the alkali leached liquid, and drying and calcining the solid phase to form vanadium oxide; (4) adding the alkali decomposition slag and hydrochloric acid to an autoclave, adding a crystal seed, stirring at an elevated temperature and maintaining the temperature to complete acid leaching and hydrolysis; (5) performing filtration and separation, washing the hydrolysate with water, drying same, and then calcining same to form titanium oxide. The method achieves the recycling of resources and does not produce industrial waste water and waste slag to achieve green production; and achieves green recycling, saves energy and reduces emissions..

Inventors:
ZHANG TINGAN (CN)
DOU ZHIHE (CN)
LIU YAN (CN)
ZHANG ZIMU (CN)
WANG YANXIU (CN)
Application Number:
CN2019/071694
Publication Date:
July 18, 2019
Filing Date:
January 15, 2019
Export Citation:
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Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C22B3/44; C22B34/22; C25B1/02
Domestic Patent References:
WO2004113230A12004-12-29
Foreign References:
CN108149015A2018-06-12
CN104962735A2015-10-07
CN101845549A2010-09-29
CN103834812A2014-06-04
US20150246822A12015-09-03
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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