Production method for high-purity copper and low-oxygen bright copper rod

Abstract

The invention relates to a high pure copper and a production method of low-oxidizing bright copper rod, comprising the steps of: performing melting and slag-skimming, poling and crystallisation by cooling to the waste copper crap to obtain the high pure copper; heating the copper to 1080-1120 DEG C to obtain the copper liquid, wherein the infusible high melting point impurities are eliminated by slag-skimming, after that, adding arenaceous quartz and silicon dioxide into the copper liquid and blowing excessive oxygen to convert the metals which are livelier than the copper into the scruff to remove, then pressurizing and blowing the oxygen to the copper liquid so that lead sub-oxide deposited at the bottom of furnace to sufficiently react with the arenaceous quartz to generate the scruff for removing the lead, guaranteeing the purity of the copper is larger than 99.5% and the lead content is less than 2ppm; the production method of low-oxidizing bright copper rod mainly comprises the steps of: taking purple copper crap as the raw material, directly placing the high pure copper liquid through the melting and slag-skimming, poling and crystallisation by cooling orderly into the continuous-casting and continuous-rolling apparatus to cast, the yield of low-oxidizing bright copper rod is larger than 98%, reaching the green environmental standard required by Europe Union ROHS, the production method has low production cost.

Description

technical field [0001] The invention relates to a production method of high-purity copper and low-oxygen bright rods. Background technique [0002] Copper is an important non-ferrous metal, which is widely used in various industrial sectors because of its excellent comprehensive properties, such as electrical conductivity, thermal conductivity, corrosion resistance and good processability. The existence of a very small amount of impurities such as lead, antimony, tin, beryllium, etc. will seriously affect the conductivity and other properties of copper. Even in different fields, there are strict requirements for the purity of copper. For example, the requirement for copper in the field of electrolysis is that its purity is at least Less than 99.95%; No. 1 electrolytic copper is required as raw material (Class A copper is better) no matter the traditional hot pressing method or the continuous casting and rolling method is used to produce copper rods. [0003] At present, the...

AI Technical Summary

Problems solved by technology

Because the lead content in it failed to exceed the standard before casting, the finally obtained copper rod did not meet the national standard and the requirements of green environmental protection, and the yield of the product was low, and the fuel consumption and power consumption were relatively high.