Title:
SELECTIVE ANTIMONY AND ARSENIC REMOVAL AND TIN RETAINING AGENT FOR REFINING SECONDARY CRUDE LEAD, AND USE METHOD
Document Type and Number:
WIPO Patent Application WO/2019/223559
Kind Code:
A1
Abstract:
A selective antimony and arsenic removal and tin retaining agent for refining secondary crude lead, and a use method, relating to the field of refinement and impurity removal of secondary crude lead. The antimony and arsenic removal and tin retaining agent comprises, on the basis of the total mass thereof, 10-30 wt% of aluminum, 65-85 wt% of calcium, 1-10 wt% of coke powder, and 1-5 wt% of lead powder. According to the content of antimony in lead, the antimony and arsenic removal and tin retaining agent is added to a lead liquid which is at a temperature of about 550-650°C according to a certain proportion so as to carry out an antimony and arsenic removal reaction; after the reaction is completed, cooling is carried out, and antimony and arsenic scum is fished out to obtain a lead liquid with antimony and arsenic removed; the content of antimony and arsenic is reduced to below 0.0005 wt%, and the content of tin is substantially unchanged. The antimony and arsenic removal and tin retaining agent provided in the present invention has a high removal rate for antimony and arsenic in a lead liquid; the deep removal of antimony and arsenic impurities is implemented; valuable metal tin is effectively retained; the production costs for lead alloy preparation are reduced; no smoke and odor appears in an antimony and arsenic removal reaction process; the working environment is good.
Inventors:
YANG CHUNMING (CN)
Application Number:
PCT/CN2019/086506
Publication Date:
November 28, 2019
Filing Date:
May 12, 2019
Export Citation:
Assignee:
JIANGSU NEW CHUNXING RESOURCE RECYCLING CO LTD (CN)
International Classes:
C22B13/06; C22B13/02; C22C1/06; C22C24/00
Foreign References:
| CN108728648A | 2018-11-02 | |||
| CN108711652A | 2018-10-26 | |||
| CN108707761A | 2018-10-26 | |||
| CN108695572A | 2018-10-23 | |||
| CN108588453A | 2018-09-28 | |||
| CN102011015A | 2011-04-13 | |||
| CN106282659A | 2017-01-04 | |||
| CN105063369A | 2015-11-18 | |||
| JPS5743074B2 | 1982-09-11 |
Other References:
See also references of EP 3805413A4
Attorney, Agent or Firm:
JIANGSU LOUSHEN LAW FIRM (CN)
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