Recently, "Technology and equipment for high-value utilization of copper smelting slag ends" and "Low-cost rapid clean magnesium smelting technology" invented by the team of professor Zhang Ting'an at the School of Metallurgy, Northeastern University won gold and silver awards at the 47th Geneva International Invention Exhibition. The above two technologies are the first in the world to propose new ideas for the use of slag-free and high-value copper slag, which have important strategic and practical significance for promoting circular economy and sustainable development and environmental protection, and have been obtained by non-ferrous metal enterprises in China. application.
According to reports, through the high-value utilization of copper smelting slag ends, the ratio of copper and iron is controlled to obtain copper-containing molten iron after vortex reduction of the depleted slag. After copper-containing molten iron is directly alloyed, copper-containing wear-resistant cast iron can be prepared or smelted Copper-containing antibacterial stainless steel, zinc, lead and other low-melting metal components are recovered in the flue gas throughout the process. Finally, it returns to the main smelting process. After the tailings are tempered and slowly cooled, they can be directly made into cement clinker, thus achieving the slag-free clean production of copper smelting.
After treatment with this new process, moderate depletion of the hot copper slag can adjust the copper content of the slag to 0.28% -0.5%, and the eddy current reduction technology and equipment can reduce the copper, iron, and zinc content in the reduced slag to 0.06, respectively. %, 0.2% and 0.03%, the utilization rate of the valuable metals copper, iron and zinc in copper slag reaches 95%, 98% and 90% respectively, so as to realize the high value of copper slag and the use of slag-free, creating The huge economic and social benefits provide technical prototypes for the clean smelting of copper worldwide. (Reporter Hao Xiaoming)
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