primary aluminum, fabricated aluminum and aluminum alloy production methods

Current industrial production of primary aluminum is the only way Hall - Carvoeiro electrolytic method. Hall by the United States and France Carvoeiro invented in 1886. Hall - Carvoeiro electrolytic method is based on aluminum oxide as raw materials, cryolite (Na3AlF6) for the flux composition of the electrolyte, at 950-970 ℃ under the conditions of the electrolyte through the electrolysis of alumina in the melt decomposition of aluminum and oxygen, carbon cathode, aluminum is precipitated liquid oxygen to the carbon anode in the form of carbon dioxide gas to escape. To produce one ton of primary aluminum, can produce 1.5 tons of carbon dioxide, the consolidated power in 15000kwh so.

Industrial Aluminum Alloys cell can be divided into the side plug anode Soderberg, inserted on the anode and Soderberg anodes slot categories. As Soderberg technology in the electrolysis process high power consumption, and not conducive to the protection of the environment, so Soderberg technology is being phased out. The current global annual production of about 28 million tons of primary aluminum, China's annual output of about 7 million tons of primary aluminum.

When necessary, the resulting aluminum electrolytic refining to obtain high purity aluminum. The current method for producing aluminum alloy melt with mainly based method. Since aluminum and aluminum alloy has excellent workability, so by forging, casting, rolling, punching, pressing and other methods to produce sheet, strip, foil, tubes, wires and other profiles.