Title:
METHOD FOR EXTRACTING FE, ZN AND PB FROM ELECTRIC FURNACE DEDUSTING ASH AND HIGH VALUE UTILIZATION OF SAME
Document Type and Number:
WIPO Patent Application WO/2023/060889
Kind Code:
A1
Abstract:
A method for extracting Fe, Zn and Pb from electric furnace dedusting ash and the high value utilization of same. Bulk dangerous waste electric furnace dedusting ash is used as a raw material, oxalic acid is used as a leaching agent, and a complex reaction is performed under the reaction conditions of a low temperature and normal pressure, so as to achieve the purpose of stepwise separation of iron and zinc resources. Under the conditions that the concentration of oxalic acid is 5-30%, the liquid-solid ratio is 10:1-50:1, the reaction temperature is 30-90℃ and the reaction time is 0.5-4 h, the leaching rate of Fe from the electric furnace dedusting ash can reach 92% or more, the content of Zn (in terms of ZnO) in leaching residues can reach 36% or more, and the purity of the finally obtained ferrous oxalate can reach 97% or more. The method has a simple process, low energy consumption and a low reaction cost; and the obtained ferrous oxalate and zinc-rich residues have smaller influence on the environment and good market application prospects, while having higher additional value.
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Inventors:
WANG DAYA (CN)
HUA SHAOGUANG (CN)
PEI DEJIAN (CN)
LI SHUQIN (CN)
LI XIANGMEI (CN)
HUA SHAOGUANG (CN)
PEI DEJIAN (CN)
LI SHUQIN (CN)
LI XIANGMEI (CN)
Application Number:
PCT/CN2022/092438
Publication Date:
April 20, 2023
Filing Date:
May 12, 2022
Export Citation:
Assignee:
SINOSTEEL MAANSHAN GENERAL INSTITUTE OF MINING RES CO LTD (CN)
HUAWEI NATIONAL ENGINEERING RES CENTER OF HIGH EFFICIENT RECYCLE AND UTILIZATION FOR METALLIC MINERA (CN)
ENGINEERING INVESTIG & DESIGN INSTITUTE OF SINOSTEEL MIMR CO LTD (CN)
HUAWEI NATIONAL ENGINEERING RES CENTER OF HIGH EFFICIENT RECYCLE AND UTILIZATION FOR METALLIC MINERA (CN)
ENGINEERING INVESTIG & DESIGN INSTITUTE OF SINOSTEEL MIMR CO LTD (CN)
International Classes:
B09B3/00; B09B5/00; C22B3/16; C22B34/12
Foreign References:
| CN111041200A | 2020-04-21 | |||
| CN105695738A | 2016-06-22 | |||
| CN113787085A | 2021-12-14 | |||
| CN110306044A | 2019-10-08 | |||
| CN102719668A | 2012-10-10 | |||
| JP2020125521A | 2020-08-20 | |||
| US20110136198A1 | 2011-06-09 | |||
| JP2016108583A | 2016-06-20 |
Attorney, Agent or Firm:
MA'ANSHAN CITY JINQIAO PATENT AGENT LTD. (CN)
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