Firstly, the copper recovered by Jiangxi Mingxin from waste circuit boards through dry crushing technology demonstrates significant recycling value in the basic industrial sector. Its recycling process achieves a copper recovery rate of over 99%, with the initial purity of copper powder reaching more than 95%. After refining, it can meet the requirements of Grade A copper specified in GB/T 467-2010 (National Standard of the People's Republic of China). This recycled copper can be directly used to manufacture core power transmission components such as wires, cables, and transformer copper strips. The low-oxygen bright copper rods produced via the "pyrometallurgical refining - continuous casting and rolling" process have electrical conductivity equivalent to that of primary copper. Compared with primary copper mining, this process reduces energy consumption by over 60% and minimizes the ecological damage caused by large-scale mineral mining each year, serving as a crucial support for resource circulation in the traditional industrial sector.
Furthermore, the recycled copper after advanced purification can better meet the strict demands of the high-end manufacturing sector. Through technologies like electrolytic purification, the purity of the recovered copper can be increased to over 99.9%, with impurity content below 400ppm, fully meeting the standards for electronic-grade materials. This high-purity recycled copper has been successfully applied in precision components such as high-frequency circuit boards for 5G communication equipment and flexible printed circuits (FPCs) for automotive electronics. In a case involving a communication enterprise, a total of 12.3 tons of recycled copper was directly used in the production of new circuit boards, not only saving 1.8 million yuan in procurement costs but also alleviating the supply pressure of special base materials. The application of rare earth microalloying impurity removal technology has further solved the problem of impurity control in waste copper recycling, ensuring that the recycled copper matches primary copper in key indicators such as electrical conductivity and ductility.
Amidst the wave of green and low-carbon transformation, recycled copper has become a vital resource for the new energy industry. Recycled copper with a purity of 99.9% can be directly used to manufacture core components for new energy vehicles, including drive motor windings, power battery foils, and high-voltage connectors, all of which fully meet automotive-grade standards. The carbon dioxide emissions from producing 1 ton of recycled copper are only 30% to 40% of those from primary copper. Based on an annual processing capacity of 20,000 tons of circuit boards, this is equivalent to reducing carbon dioxide emissions by 120,000 tons. Combined with digital traceability systems such as "battery passports," these recycled copper materials have realized transparent whole-life-cycle management. This not only reduces the carbon footprint of the entire industrial chain of new energy vehicles but also reduces reliance on scarce mineral resources through recycling, providing a practical resource solution for achieving the "dual carbon" goals.
