Pyrometallurgical process

A process for the production of a solder product and a copper product comprising the provision of a first lead-tin based metal composition which is comprising at least 40% wt of copper, at least 8.0% wt of tin, at least 3.0% wt of lead, and at least 10% wt together of tin and lead, the process further comprising the steps of:

• d) partially oxidizing a first liquid bath comprising the first lead-tin based metal composition, thereby forming a first dilute copper metal composition and a first solder refining slag, followed by separating the first solder refining slag from the first dilute copper metal composition;
• and
• l) partially oxidizing a second liquid bath comprising the first dilute copper metal composition, thereby forming a first high-copper metal composition and a third solder refining slag, followed by separating the third solder refining slag from the first high-copper metal composition,
• whereby the solder product is derived from the first solder refining slag by a partial reduction of the first solder refining slag, and whereby the copper product is derived from the first high-copper metal composition, and optionally whereby a solder product is also derived from the third solder refining slag.