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Title:
METHOD FOR PROCESSING ZINC OXYCHLORIDE-CONTAINING SECONDARY MATERIAL
Document Type and Number:
WIPO Patent Application WO/2016/000231
Kind Code:
A1
Abstract:
A method for processing a zinc oxychloride-containing secondary material comprises the following steps: 1) leaching a zinc oxychloride-containing secondary material I by using an acid solution; 2) selectively extracting zinc by using a P204-kerosene solvent; 3) conducting reverse extraction-electrolysis to recycle zinc; 4) cyclically operating steps 1) to 4) to achieve enrichment of chlorine, potassium, sodium, magnesium and the like and form a chlorine salt-sulfate mixed system; 5) opening the raffinate obtained in step 4), mixing the opened raffinate with a zinc oxychloride-containing secondary material II when the input and opening balance of chloride ions is achieved, conducting liquid-solid separation, and performing step 1) on the separated deposits for leaching with the acidic raffinate; 6) when the separated solution satisfies a preset condition, purifying the chlorine-containing water phase; and 7) conducting evaporation and concentration to obtain KCl and NaCl products by means of crystallization. This processing method is environment-friendly and energy-saving, requires no discharge of process wastewater, significantly reduces the production cost, and completely eliminates secondary pollution caused by the current dechlorination process.

Inventors:
SHU, Yuzhang (No.246, Qinghong Road Xiangyun Count, Dali Automonous Prefecture Yunnan 0, 672100, CN)
ZHANG, Qi (No.246, Qinghong Road Xiangyun Count, Dali Automonous Prefecture Yunnan 0, 672100, CN)
YANG, Guifen (No.246, Qinghong Road Xiangyun Count, Dali Automonous Prefecture Yunnan 0, 672100, CN)
SUN, Baohua (No.246, Qinghong Road Xiangyun Count, Dali Automonous Prefecture Yunnan 0, 672100, CN)
WEI, Linkui (No.246, Qinghong Road Xiangyun Count, Dali Automonous Prefecture Yunnan 0, 672100, CN)
Application Number:
CN2014/081557
Publication Date:
January 07, 2016
Filing Date:
July 03, 2014
Export Citation:
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Assignee:
YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECHNOLOGY CO ., LTD. (No.246, Qinghong Road Xiangyun Count, Dali Automonous Prefecture Yunnan 0, 672100, CN)
International Classes:
C22B3/26; C22B7/02; C22B19/30
Foreign References:
CN102808087A2012-12-05
CN103060561A2013-04-24
CN1858272A2006-11-08
JP2008266774A2008-11-06
Other References:
See also references of EP 3165616A4
Attorney, Agent or Firm:
BEIJING UTC LIANFENG INTELLECTUAL PROPERTY LAW OFFICE (GENERAL PARTNERSHIP) (Room 408, Asia-pacific Enterprise BuildingNo.333, Zhaojiabang Road, Xuhui District, Shanghai 0, 200030, CN)
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