Preparation method of electric stranded wire

Abstract

The invention discloses a preparation method of an electric stranded wire. The preparation method is characterized by comprising the following preparation steps of (1) raw material preparation, wherein raw materials comprise more than 50wt% of a regenerated copper electrolytic plate and the balance of a mineral copper electrolytic plate; and (2) smelting, wherein the electrolytic plates are put into a furnace to be molten, charcoal is added while melting is carried out, after melting, the temperature is kept at 1200-1250 DEG C, after the temperature is kept for 0.5-3 h, the electrolytic plates are transferred into a heat preservation furnace, charcoal is added into the heat preservation furnace for covering, the temperature of the heat preservation furnace is controlled at 1150-1200 DEG C, the temperature is kept for 1-2 h, and meanwhile mixed gas of inert gas and reducing gas is blown into the bottom of the heat preservation furnace. According to the method, more than 50wt% of regenerated copper is adopted as the raw materials, degassing, oxygen removal and impurity removal are carried out through a bottom blowing technology, annealing is also carried out, crystal grains are fine and uniform, plasticity is good, the wire is not broken during subsequent wire drawing, the stranded wire with the single wire specification being smaller than 0.2 mm is prepared from more than 50% of regenerated copper, and the electric conductivity is basically consistent with that of a stranded wire prepared from mineral copper.

Description

Technical field [0001] The present invention belongs to the field of copper alloy technology, and more particularly to a method of preparing a nicch latch. Background technique [0002] The electrical scores are mainly used for 3c electronic products, household appliances, cable wires, etc., the conductive requirements are high, and the raw materials for the preparation of electrical strands mainly use high pure mine copper electrolyte boards, especially for the single-line diameter of the electro-stranded wire than 0.20mm. Products, copper content requirements in mine copper electrolyte plates must be higher than 99.95%. However, in the carbon neutralization and development trends, in order to reduce carbon emissions, many industries have proposed the use requirements of regenerative raw materials, and the electroless wire is also there. [0003] A portion of the regenerated copper replacement mine copper electrolyte plate can reduce energy consumption, but the purity of renewab...

AI Technical Summary

Problems solved by technology

[0003] Using a part of recycled copper instead of ore copper electrolytic plate to produce electric strands can reduce energy consumption, but the purity of recycled copper is low, the copper content is above 99.90%, and the impurity elements are uncontrollable, resulting in a decrease in the plasticity of the strands and a decrease in conductivity. Reduced, the breakage rate in the subsequent wire drawing process is extremely high, and it cannot be industrialized, especially for products with a diameter of less than 0.20mm, which is difficult to meet the production needs

[0004] Because there is a certain process difficulty in using recycled copper to prepare electric stranded wires, the related technology has not been disclosed in the prior art. Therefore, the preparation method for the existing electric stranded wires needs to be further improved