Title:
GREEN AND EFFICIENT REFINING METHOD FOR COMPLEX CRUDE TIN
Document Type and Number:
WIPO Patent Application WO/2024/060891
Kind Code:
A1
Abstract:
A green and efficient refining method for complex crude tins, which belongs to the technical field of pyrometallurgy of non-ferrous metals. The method comprises: subjecting a crude tin melt obtained by reduction smelting to a condensation operation twice for iron and arsenic removal, combining produced tin B and condensation residues, and feeding same into a centrifugal machine for an iron and arsenic removal operation; combining a crude tin melt produced by the second condensation operation and a crude tin melt produced by the iron and arsenic removal operation in the centrifugal machine, and subjecting same to selective oxidation to remove copper, arsenic, nickel and antimony; subjecting the treated crude tin melt to continuous crystallization to remove lead, bismuth and silver; or subjecting the treated crude tin melt to continuous crystallization to remove lead, bismuth and silver; and subjecting the treated crude tin melt to vacuum volatilization to deeply remove lead and bismuth. The whole process is safe and controllable, and has high adaptability to raw materials; crude tins with different tin-containing components can all be effectively treated, the direct recovery rate of tin is high, the amount of generated waste residues is small, and the process is green and environmentally friendly; and refined tins meeting various grade standards prescribed in GB/T728-2020 can be obtained by selecting different processes.
Inventors:
SONG XINGCHENG (CN)
YANG BIN (CN)
WANG YANKUN (CN)
LIU QINGDONG (CN)
CHEN YUN (CN)
TANG DUZUO (CN)
YUAN HAIBIN (CN)
XU BAOQIANG (CN)
LI YIFU (CN)
MA SHILIN (CN)
DING JIAN (CN)
XU WANLI (CN)
KONG LINGXIN (CN)
XIONG HENG (CN)
CHEN XIUMIN (CN)
YANG DEXIANG (CN)
YANG BIN (CN)
WANG YANKUN (CN)
LIU QINGDONG (CN)
CHEN YUN (CN)
TANG DUZUO (CN)
YUAN HAIBIN (CN)
XU BAOQIANG (CN)
LI YIFU (CN)
MA SHILIN (CN)
DING JIAN (CN)
XU WANLI (CN)
KONG LINGXIN (CN)
XIONG HENG (CN)
CHEN XIUMIN (CN)
YANG DEXIANG (CN)
Application Number:
PCT/CN2023/113422
Publication Date:
March 28, 2024
Filing Date:
August 17, 2023
Export Citation:
Assignee:
YUNNAN TIN CO LTD TIN BRANCH (CN)
UNIV KUNMING SCIENCE & TECHNOLOGY (CN)
UNIV KUNMING SCIENCE & TECHNOLOGY (CN)
International Classes:
C22B25/08; C22B1/00; C22B9/02; C22B9/04; C22B15/00; C22B23/02; C22B30/02; C22B30/04
Foreign References:
| CN115369262A | 2022-11-22 | |||
| CN102492861A | 2012-06-13 | |||
| CN102251126A | 2011-11-23 | |||
| CN102534249A | 2012-07-04 | |||
| CN111850321A | 2020-10-30 | |||
| CN113737017A | 2021-12-03 | |||
| CN2073325U | 1991-03-20 | |||
| US4571260A | 1986-02-18 |
Attorney, Agent or Firm:
MUDA INTELLECTUAL PROPERTY FIRM et al. (CN)
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