Aluminum melt rotary dusting and deaeration machine used in aluminum processing enterprises
ã€China Aluminum Industry Network】 In 2008, the world’s primary aluminum production was 42540 kt, the production of recycled aluminum was approximately 17,000 kt, and the total aluminum consumption was nearly 60000 kt. They were consumed in the form of aluminum and castings for various productions in the national economy, among which aluminum ( Plates, belts, foils, tubes, rods, patterns, wires, forgings, powders, etc.) about 40,500 kt, cast products (die castings, castings, etc.) about 19,500 kt.
Before the production of aluminum and foundry products, it is necessary to first cast the raw aluminum obtained by electrolysis into ingots. After the metastables are remelted, they are cast to form flat ingots and round ingots and strands for processing. After the scrap aluminum is melted, it is partially cast. The remanufactured aluminum alloy ingots are recast and cast into various die castings and castings. However, since a part of the primary aluminum is directly cast into ingots for processing, a part of the regenerated aluminum alloy melt is directly cast into ingots for casting and processing. In the production of aluminum and foundry products, the degassed aluminum melt is required to be approximately 85,000 kt, rather than twice the total aluminum consumption, ie 120,000 kt (120 mt). In the production of aluminum melt will always be mixed with a certain amount of solid inclusions and absorption of a certain amount of gas, the former mainly to oxides (such as alumina), the latter mainly to hydrogen.
According to different alloy smelting processes, the content of solid inclusions is generally 0.8#-2%, and the hydrogen content is usually 1.8ml/100g aluminum to 4.5ml/100g aluminum. In order to produce high quality aluminum and foundry products, The solid inclusions and gas content in the aluminum melt are purified to the lowest possible level. The purification treatment is performed inside and outside the furnace, and the furnace treatment is to add a certain amount of flux-inert gas to the aluminum melt, so that the inclusions and hydrogen float to the surface of the aluminum melt, and then they are pulled out. The production is called eight. Slag. In order to accelerate the separation process of the inclusions, the melt must be stirred. Stirring the melt also has the effects of uniform temperature, uniform alloy yarn, and uniform flux. When smelting aluminum alloy in a conventional modern reverberatory furnace, the temperature is always non-uniform, the surface temperature is high, the temperature in the lower layer is low, and sometimes the difference is between thirty and forty degrees Celsius. After stirring, the melt temperature difference is preferably not more than 5°C. In addition to inclusions, degassing, or adding fluxes, conventional furnaces pass inert gas, and most of the stirring is carried out independently. Not only does it have a large amount of labor, it takes a long time to operate at high temperatures, and it does not function to improve the purification efficiency.
Fuzhou Mate New High Temperature Material Co., Ltd. Ke Dongjie senior engineer invented the rotating rotary powder mixing degasifier will add flux, pass inert gas and stirring set in one, by a machine mechanical action one-time completion, labor conditions In order to change, time has been significantly shortened, quality has improved, and efficiency has improved. The degasifier has been granted a Chinese patent on March 11, 2009, Patent No. Z.6.
This multi-functional rotating-dust stirring and degassing machine in the furnace is composed of a rack device, a tilting and rotating device, a powder spraying device, and a guide device. The relevant transmission method involved in the tilting and rotating device may be a manual screw jack type, and may also be a hydraulic and pneumatic method. This new type of rotating rotary powder mixing degasifier has the following features: simple structure, easy to use, dual function of powder spraying and stirring, working in the furnace is not limited by the degree of freedom, mechanical stirring of aluminum melt, alloy chemical composition and melting The body temperature is quickly and evenly achieved, and at the same time, the degassing and slag removal effect in the furnace is achieved, and the melt purification speed is fast and the effect is ideal. At present, there are more than 10 such rotating powder mixing degasifiers that are operating in the casting shop of aluminum processing companies.
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