Aluminum Ash Processing And Circulation Use Research

Aluminum in the production, consumption and regeneration process, every year a large amount of aluminum dust, aluminum dust is the main component is aluminum, alumina, aluminum nitride, etc., how to properly handle the aluminum gray, gray recycled aluminum to achieve the increase economic benefits while reducing environmental pollution, is the current number of electrolytic aluminum enterprises must be tackled as a problem.In this paper, the recovery from aluminum gray aluminum simple substance of the new technology, the aluminum recycling gray and cold heat recovery combined to form a new process, its main features:the artificial electric fry ash into operation Stir, reduce labor intensity; rapid cooling of hot ash, reducing the burning; the use of dust collection equipment, dust, clean production; gray aluminum heat recovery and the combination of cold recycling, aluminum recovery, with the exception of aluminum casting furnace ash Bachu after burning and the recycling of aluminum remelting furnace burning outside the back cast, only a small amount of elemental aluminum has not been recovered. Aluminum recycling new technology, the average Jiaozuo Wan fang Aluminum gray cast by the loss before the treatment decreased to10.184%o gray aluminum handle after5.849%o, the average loss cast down4.335%o, and achieved good economic and social benefits.Will be directly added to the secondary aluminum ash per kilogram of aluminum electrolytic cell in gray value equivalent to0.53kg of alumina is the most direct method of recycling aluminum gray, but the trial has also been observed to add the second silicon content aluminum ash resulting rise high voltage increases, such as bottom sediment increased adverse effects. Electrolytic production of secondary aluminum in the ash can all return after the cell increased silicon content of molten aluminum0.003%,0.0025%increase in iron content, may cause some decline in the level of product quality, long-term when adding gray aluminum silicon, iron content can reach dynamic equilibrium.30%of aluminum ash of unknown substances in the electrolyte will gradually accumulate, eventually leading to electrolyte changes in the nature, you will need long-term production from the trial in order to find.Through industrial tests showed that the production of secondary aluminum ash into the anode guard ring to protect steel fingernail, steel fingernail corrosion mitigation can be achieved, reducing the iron content in the electrolyte, increasing economic role. Gray aluminum guard ring and guard ring carbon compared to aluminum dust protection ring, better protection, lower cost, do not pick up the pieces, is the carbon ring is the ideal alternative.