Process for directly preparing oxygen-free copper from waste red impure copper

Abstract

The invention relates to preparation of oxygen-free copper, in particular to a process for directly preparing oxygen-free copper from waste red impure copper. The process comprises the steps of conducting melting refining on the waste red impure copper through a refining furnace; conducting impurity removal, deoxidation and purification on smelted molten copper; putting the purified molten copperin a standing furnace to conduct standing and then deoxidation; and leading out the molten copper subjected to standing and deoxidation through an up-drawing furnace to obtain an oxygen-free copper product. Through the process, oxygen-free copper bars or oxygen-free copper products are directly prepared just from the waste red impure copper; the requirements for the oxygen content and the copper content in the early period are met through the two impurity removal and deoxidation processes of oxidation reduction and rare earth refining agents; and the re-deoxidation process is completed througha carbon filter tank, a sealing carbon flow channel and standing furnace carbon reduction at a copper outlet. Through the optimized short process, resources are saved, and meanwhile, the high-qualityoxygen-free copper products can be directly prepared.

Description

technical field [0001] The invention relates to a process for preparing oxygen-free copper, in particular to a process for directly preparing oxygen-free copper by using waste red miscellaneous copper. Background technique [0002] my country is a country that lacks copper resources, but it is also the country that ranks first in the world in copper production. Among the copper production, about 50% are pure copper wire and copper rod products, which are mainly used for wire and cable and conductor materials. Among them, copper rod processing is mainly based on continuous casting and rolling bright low-oxygen copper rods and continuous casting oxygen-free copper rods by the above-mentioned method. The bright low-oxygen copper rod is mainly used for the processing of ordinary wire products; the oxygen-free copper rod has less burrs and good processing performance after processing. Its products are mainly used for high, precise and cutting-edge products such as electromagneti...

AI Technical Summary

Problems solved by technology

At present, all the bright low-oxygen copper rods prepared from waste red copper have an oxygen content of 400ppm and above and a copper content of less than 99.9% due to the redox technology and the refining technology of the refining agent. Rods can only be used to manufacture subsequent low-end and mid-end products. Such bright low-oxygen copper rods cannot be used to draw small copper wires or thin and micro-wire copper products, because small or thin wire products can only use oxygen-free copper rod to draw

At present, for the preparation of oxygen-free copper products such as oxygen-free copper rods or oxygen-free copper bars, the raw materials must all use electrolytic copper (cathode copper, with a copper content of more than 99.96%), and there is no oxidation-reduction refining process in the middle, otherwise it will not be possible. Oxygen-free copper products are produced