US 11,746,395 B2
Solder production process
Bert Coletti, Beerse (BE); Jan Dirk A. Goris, Beerse (BE); Yves De Visscher, Beerse (BE); Charles Geenen, Beerse (BE); Walter Guns, Beerse (BE); Niko Mollen, Beerse (BE); Steven Smets, Beerse (BE); and Andy Breugelmans, Beerse (BE)
Assigned to METALLO BELGIUM, Beerse (BE)
Appl. No. 16/771,368
Filed by METALLO BELGIUM, Beerse (BE)
PCT Filed Dec. 11, 2018, PCT No. PCT/EP2018/084380
§ 371(c)(1), (2) Date Jun. 10, 2020,
PCT Pub. No. WO2019/115536, PCT Pub. Date Jun. 20, 2019.
Claims priority of application No. 17207365 (EP), filed on Dec. 14, 2017.
Prior Publication US 2021/0363606 A1, Nov. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C22B 15/00 (2006.01); B23K 35/30 (2006.01); C22B 5/02 (2006.01); C22B 7/04 (2006.01); C22B 13/02 (2006.01); C22B 25/06 (2006.01); C22C 9/08 (2006.01); C22C 13/00 (2006.01)
CPC C22B 15/0054 (2013.01) [B23K 35/302 (2013.01); C22B 5/02 (2013.01); C22B 7/04 (2013.01); C22B 13/025 (2013.01); C22B 15/0056 (2013.01); C22B 25/06 (2013.01); C22C 9/08 (2013.01); C22C 13/00 (2013.01)] 16 Claims
 
1. A process for producing a crude solder composition, comprising the provision of a first solder refining slag which slag comprises at least 12% wt together of tin and lead and at most 10.0% wt together of copper and nickel, the process further comprising the steps of:
e) partially reducing the first solder refining slag, thereby forming a first crude solder metal composition and a second solder refining slag, followed by separating the second solder refining slag from the first crude solder metal composition; and
f) partially reducing the second solder refining slag, thereby forming a second lead-tin based metal composition and a second spent slag followed by separating the second spent slag from the second lead-tin based metal composition,
wherein a copper containing fresh feed is added to step f) and wherein the second lead-tin based metal composition comprises at least 60% wt together of copper and nickel.