METHOD FOR PROCESSING ZINC OXYCHLORIDE-CONTAINING SECONDARY MATERIAL - YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECHNOLOGY CO LTD

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 (CN)
ZHANG QI (CN)
YANG GUIFEN (CN)
SUN BAOHUA (CN)
WEI LINKUI (CN)

Application Number:

PCT/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 (CN)

International Classes:

C22B3/26; C22B7/02; C22B19/30

Foreign References:

CN102808087A	2012-12-05
CN103060561A	2013-04-24
CN1858272A	2006-11-08
JP2008266774A	2008-11-06

Other References: