There are two key types of copper resources available for recycling:
A big category called new resources, the key is to refer to the whole process of industrial production caused by the "waste", this kind of "waste" to the corner of the residual material, mechanical processing slag dominated. If strict requirements, can distinguish the model of copper and aluminum alloy, this kind of resources can be used to acquire the relative copper processing plant professional counterpart. In copper and copper alloy material production and processing as an example, the amount of copper processing material, there are about 30-40% into tailings material, it in the specific manufacturing copper processing material utilization rate, a variety of electrical components factory in tailings, popular, because they see more copper semi-finished products processing, all caused by the mechanical processing and manufacturing.
Second type copper renewable energy called old resources, is all kinds of industrial products, machinery and equipment, accessories of copper handicrafts, this kind of resources is derived from the complex, all kinds of industrial products life cycle time is different, in which the reconstruction with copper, attainable only after the removal of industrial products, and is usually a variety of alloy copper mixed together, such as cars with heat pipe cooling, The pipes of the water storage tank are H90 copper, the radiators are T2 wavy amorphous strip, and they are also welded together with lead-tin welding materials. The water chamber of the water storage tank is H68 aluminum alloy, etc. The key second type of renewable energy sources are: electronic components, water tanks, air conditioners, waste copper electrical conductors (cable, cable, conductive ground copper bar), etc. The copper to be delivered, according to the International Copper Association's data information, the true utilization rate of copper is 85 percent, part of the nature's chemical recycling system.
There are various types of recycled copper resources and different recycling methods, but the basic procedure is as follows: Reconstituted copper raw material inspection project acceptance -- clear proportion of impurities -- sampling analysis of ingredients -- pre-solution of regenerated particles -- sintering smelting (crucible furnace, crucible furnace) -- forging (casting parts, working pressure production and processing blank material, copper core rod, thick copper block, remelted aluminum alloy ingots, etc.)
Examples of typical copper recycling processes are as follows:
1. Purple miscellaneous copper (bare copper core line) -- preparation treatment (selection, air drying, baling, bagging, pellet making, etc.) -- reflection furnace smelting (20-100 tons/furnace) air oxidation, recovery -- middle holding furnace -- continuous rolling copper bright rod (copper composition ≥98.0%, conductivity ≥98%IACS);
2. Yellow copper → preparation treatment (selection, baling, packing, dish, etc.) → magnetic induction smelting (3-6 tons/furnace) → thermal preservation furnace (6 tons) → multi-stage horizontal continuous casting bar billet → lead brass quick cutting bar (HPB58-2, for making lock)
3. Car and large tractor water storage tank → disassembly, removal of cover shell → baking, part of the removal of lead-tin welding material → melting of boiler crucible, slag removal → iron forging → copper casting → analysis of chemical composition → for the production and manufacture of forged copper parts, piston pins, valves, sanitary ware and so on.
4. Air conditioner air conditioner evaporator, cooler, preparation treatment (remove elbow, end plate, oil, grinding to the length of 30-50mm), wind blowing aluminum radiator, beneficiation iron removal equipment, packaging, mixing sintering smelting aluminum bronze, aluminum copper, can also produce copper casting;
5. Remanufactured yellow brass casting block → magnetic induction smelting high strength wear resistant copper;
6. Cable made of copper rice → immediately used as copper smelting seasoning application, in order to avoid the end of copper floating on the surface of copper liquid, can be pressed into the copper liquid after packaging;
7. Red copper chip, red copper chip → pelletizing → magnetic induction smelting → remelted copper ingot → smelting relative aluminum alloy;
8. Copper oxide, copper ash → mixing wood carbon chips, clay, etc., pellet → fire smelting copper, recovery of crude copper → casting block → anodic oxidation furnace → anode plate → electrolysis refined into electrolytic nickel.
Accompanied by reengineering and reengineering the technical trend of the development of copper industry development, reconstruction of copper production has been sent to machinery automation, the steps and development trend of automation technology of bearing, capitalist countries overseas has appeared the household electrical appliances, electronic components, heat exchangers and other key reengineering copper kinds of systematic reconstruction using and production lines, with the development of social economy, Recycled copper will emerge as a key industrial chain in the economic system.
