A kind of copper refining agent for waste electromagnetic wire and its preparation method and application
A technology for copper refining and refining agent, applied in the field of copper refining agent and its preparation, can solve the problems of undescribed, large consumption of rare earth elements and high cost, and achieve the advantages of avoiding secondary pollution, promoting the recycling industry and reducing costs. Effect
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Embodiment 1
[0066] Take 50 kg of surface-treated electromagnetic wires with a copper content of 99.72 wt % and refine them. First, dry the electromagnetic wire at 350°C for 2 hours, then put it into an intermediate frequency furnace and melt it at a temperature of 1160°C-1190°C, cover the copper liquid with calcined charcoal calcined at 700°C, add 0.15kg of this refining agent, and heat it at 700°C The calcined graphite rod is slightly stirred, slagging is made with a slagging agent, and the slag is cleaned and cast in a cylindrical iron mold to obtain an ingot, and the surface defects are turned off. Chemical analysis shows that the copper content is 99.96wt%, and the resistivity is 0.01720×10 -6 Ωm, the oxygen content is 8ppm.
Embodiment 2
[0068] The chemical composition of the waste magnet wire is shown in Table 1, and 100 kg of waste copper pipes with this composition are taken for refining treatment. First, dry the waste copper tube at 500°C for 2 hours, then put it into an intermediate frequency furnace and melt it at a temperature of 1180°C-1210°C, cover the copper liquid with graphite powder calcined at 700°C, add 0.4kg of this refining agent, and use 700°C ℃The calcined graphite rod was stirred a little, and after cleaning the slag, it was casted into an iron mold to obtain an ingot. The content of Fe and Ni.
[0069] Table 1
[0070]
Embodiment 3
[0072] Take 100 kg of copper waste magnet wires with a surface-treated copper content of 99.40 wt % for refining treatment. First dry it at 350°C for 2 hours, then melt it in an intermediate frequency furnace at a temperature of 1160°C-1190°C, cover the copper liquid with charcoal calcined at 700°C, add 0.5kg of this refining agent, and calcinate at 700°C Stir the graphite rod for a while, add slagging agent, remove the slag and cast it in a cylindrical iron mold to obtain an ingot, turn to remove surface defects, and cold forge to Annealed for 1 hour, cold drawn into The wire rod, the chemical analysis copper content is 99.95wt%, the resistivity is 0.01721×10 -6 Ωm, the oxygen content is 8ppm. The mechanical properties are Rm=412MPa.
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