Method and device for separating 434 aluminum alloy composite plates

Abstract

The invention discloses a method and device for separating 434 aluminum alloy composite plates, belongs to the field of nonferrous metallurgy, and mainly solves the problem of recycling of the 434 aluminum alloy composite plates. The preparation method comprises the following steps: firstly, melting a coating alloy of the 434 aluminum alloy at 574-643 DEG C in a high-temperature centrifugal machine; then centrifugally separating the molten alloy, discharging the molten alloy through a liquid phase outlet pipe, closing a centrifugal mechanism, and taking out the unfused alloy; and finally, the molten alloy and the incomplete alloy are smelted in a smelting furnace and poured into cast ingots. The device comprises a shell, a heat preservation layer, a PID furnace temperature self-adjusting system, a centrifugal mechanism, a liquid outlet mechanism, a melt deposition tank, a liquid phase outlet pipe, a furnace cover lifting mechanism, a feeding and discharging mechanism and a tool. According to the method, a temperature field and a centrifugal force field are used for achieving same-grade recovery after a coating layer and a core layer of the 434 aluminum alloy composite plate are effectively separated, and 3003 aluminum alloy and 4004 aluminum alloy with the same-grade quality are obtained through separation.

Description

technical field [0001] The invention belongs to the separation of alloys in the field of non-ferrous metal metallurgy, and particularly relates to a method and a device for separating 434 aluminum alloy composite plates. Background technique [0002] Under the requirements of lightweight automobiles, aluminum alloy composite plates with strong corrosion resistance and good electrical and thermal conductivity have become the preferred materials for automobile heat exchangers instead of copper plates. Among them, the most widely used 434 aluminum alloy clad plate is composed of three layers of metal. Low, good fluidity, element diffusion occurs with the core layer alloy during brazing or hot rolling, and composites into a high-performance composite plate with good metallurgical bonding. However, from raw materials to smelting and casting, to finished products, the comprehensive yield of such composite panels is usually only about 61%. If this high-performance composite board...

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Problems solved by technology

Mechanical separation is used for 434 aluminum alloy composite panels, because the composite panels are generally millimeter-thick sheets, which cannot only clamp one alloy, and the strength of the joint surface is higher than that of the base metal, and the fracture occurs on the 3003 aluminum alloy side , the purpose of separation cannot be achieved; electrolytic separation is used, because the two alloys are aluminum alloys, the potential difference is small, and it is easy to cause a large amount of corrosion of the aluminum matrix; , consumes too much energy, and cannot be completely separated

[0004] If the composite board is recycled and reused as a whole without separating it, such as direct hot-pressing combined recycling, the cladding layer and the core layer cannot be uniformly combined; if it is made into a functionally graded material with different alloys in different parts, the current process It is not yet mature; the recycling method of remelting the composite plate into an alloy is adopted, and since the main alloying elements of the core layer alloy and the double-sided cladding layer alloy are the impurity elements of the other party, and with the cladding rate of 434 aluminum alloy The content of the melt after remelting of different composite plates varies greatly, which greatly increases the difficulty of removing impurity alloy elements, causes a large loss of alloy elements, increases the recovery time and cost, and the quality of the recovered alloy Descending, can only be used for downgrading

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