Scrap copper regeneration and processing methods

In fact all scrap copper can be regenerated. The regeneration process is simple. First sort the collected scrap copper. Non-contaminated scrap copper or copper alloys with the same composition can be used directly after melting in the furnace; the heavily polluted scrap copper should be further refined to remove impurities; and the mixed copper alloy scraps must be melted and then subjected to composition adjustment. Through such regeneration treatment, the physical and chemical properties of copper are not impaired, allowing it to be completely renewed. Recycled waste copper should be treated in a two-step process. The first step is to dry and burn organics such as oil and grease. The second step is to smelt the metal and remove metal impurities from the slag.

As scrap copper can be regenerated, it has higher value. For example, the price of clean Grade 1 scrap copper can reach over 90% of the new refined copper price; the price of new brass scrap can also reach over 80% of the corresponding brass price.

The waste copper scrap processing technology and equipment in the world form an advanced copper scrap copper processing technology for tilting fire refining process and ISA electrolytic process. West Germany Refining Company (NA) Huteng Vic Caesar Plant (HK) is currently the world's largest and most advanced waste copper refinery, using a tilting furnace (350t/f) and a reverberatory furnace (200t/f ) Disposal of waste copper, the use of ISA process (DK = 313A / m2) production of copper cathode, production capacity of 170,000 t / a.

Compared with the advanced reprocessing technology in China, the pretreatment and recycling process and equipment of scrap copper are behind the whole, and the pretreatment and recycling of scrap copper are delinked. There is no scrap copper from China so far. Dismantled to the complete copper scrap copper refinery factory, scrap copper refinery plants are many small scale, backward technology, poor equipment, serious environmental problems. China has not yet had a modern miscellaneous copper refinery or workshop. The scale of these plants is generally between 0.5 and 3 million tons. The fire refining method basically uses reverberatory furnaces with furnace energy ranging from 25 to 110 tons. This type of furnace has low thermal efficiency and high energy consumption. The black dust pollution during the restoration operation is severe and the workers’ labor Strong intensity. The product quality can only reach or even fall below the standard cathode copper level in the GB/T467-1997 standard. A considerable amount of high quality scrap copper is directly produced without the refining of copper ingots and copper "black bars."

The participation of major domestic copper companies, such as Jiangxi Copper, Yuntong Copper, Tongling and Daye, which deal mainly with copper concentrates, will inevitably increase the competition of domestic scrap copper raw materials and impact small and medium scrap copper enterprises. Jiangtong Copper will introduce advanced technologies. The tilting anode furnace and the special copper processing workshop were established as an important measure to realize the overall plan of the company.

China's scrap copper recycling, processing industry must take the path of healthy development of technological progress.