REFINING FOR REMOVING IRON, NICKEL, ETC., IN TIN-BASE LEAD-FREE SOLDER AND TIN-LEAD BASE SOLDER BY FORMING COPPER EUTECTIC BODY

摘要

PPROBLEM TO BE SOLVED: To obtain a desired simple technique because a large facility and many processes are needed for refining for removing iron, nickel, etc. in a recycle-refining for tin-base lead-free solder and tin-lead base solder in the conventional technique, and the skill of an operator in charge of the recycle-refining is required. PSOLUTION: Respective eutectic bodies having high melting points, are generated by combining copper with iron, nickel, etc., by adding the copper at a high temperature zone, from the conventional solder recycle-refining at the low temperature zone, and the temperature is lowered again to near the melting point to separate and remove the iron, nickel, etc. PCOPYRIGHT: (C)2005,JPO&NCIPI