Natural characteristics of copper alloy
Metallic copper, elemental symbol Cu, atomic weight 63.54, specific gravity 8.92, melting point 1083oC. Pure copper is light rose or reddish, and its appearance is copper-copper when it forms a copper oxide film. Copper has many valuable physicochemical properties, such as high thermal conductivity and electrical conductivity, strong chemical stability, high tensile strength, easy fusion, corrosion resistance, plasticity, and ductility. Pure copper can be drawn into very thin copper wire to make a very thin copper foil. It can form alloys with metals such as zinc, tin, lead, manganese, cobalt, nickel, aluminum and iron.
The development of copper alloy exercise technology has gone through a long process, but so far the exercise of copper is still based on fire method, H65 brass wire | H62 brass capillary | H59 brass row | QSn6.5-0.1 tin bronze rod | Tin bronze tube | tin bronze plate production accounts for about 85% of the total international copper production. 1) Fire method is generally to first increase the original ore containing a few percent or a few thousandth of copper by mineral processing to 20-30%, as a copper concentrate, in a closed blast furnace, reverberatory furnace, electric furnace or flash furnace The smelting smelting is carried out, and the produced smelting (copper copper) is then sent to a converter for blowing into blister copper, and then oxidized refining in another reverberatory furnace to remove impurities, or cast into an anode plate for electrolysis, and the grade is as high as 99.9% electrolytic copper. The process is simple and adaptable. The recovery rate of copper can reach 95%. The price of H59 brass is exhausted. Because the sulfur in the ore is discharged as sulfur dioxide exhaust gas in the two stages of smelting and blowing, it is difficult to recycle and easily cause pollution.
In recent years, there have been smelting of molten pools such as the silver method, the Noranda method, and the Japanese Mitsubishi law, and the fire method has been gradually continuous and automated. 2) Modern wet exercise has sulphation roasting-leaching-electrowinning, leaching-extraction-electrowinning, bacterial leaching, etc., suitable for low-grade complex ore, copper oxide ore, copper-containing waste ore heap leaching, tank leaching Or leaching on the spot.