A recycling and sinking treatment system for aluminum scraps processed by aluminum alloy wheels

Abstract

The invention discloses a recovery precipitation melting treatment system for aluminum alloy hub machining aluminum scraps, and belongs to the technical field of waste aluminum recovery. According to the recovery precipitation melting treatment system for the aluminum alloy hub machining aluminum scraps, by further optimizing a melting process, molten aluminum can be pumped into a main melting chamber at a flow speed easy to control according to needs, precipitation melting circulation is carried out under the power of a circulating pump, meanwhile, by improving a structure of a swirl chamber, an eddy current effect is improved through a whistle-shaped structure, formation of a vortex with an up-down overturning action can be achieved through cooperation of gravity-direction annular guide plates and a magnetic rotation functional acceleration belt, the aluminum scraps are forced to be instantly entrained into the molten aluminum under the dual actions of rotation and rolling, and therefore the aluminum scraps are melted under the condition of air isolating, oxidation burning losses of the aluminum scraps are effectively reduced, and the precipitation melting efficiency and quality are remarkably improved; and compared with a traditional precipitation melting treatment system, a completely excellent waste aluminum recovery rate is achieved, and the oxidation loss is greatly reduced.

Description

Technical field [0001] The invention relates to the technical field of waste aluminum recovery, and more specifically, to a system for recovering and melting aluminum scraps from machining of aluminum alloy wheels. Background technique [0002] Due to the substantial improvement of aluminum recycling capacity, the application of aluminum in a wide range of product fields is showing a rapid upward trend. In-depth optimization of the smelting process is an important condition for realizing the economics of aluminum recycling. Aluminum casting in the automotive industry is an example of increasing scrap, such as aluminum alloy wheel machining debris, turning and drilling scraps. The bulk density of these materials will Depending on the size and shape, it varies between 80-720kg / m3. In the prior art, this type of waste requires expensive smelting technology to be economically processed in the plant. [0003] At present, there are mainly the following methods for the recovery and melti...

AI Technical Summary

Problems solved by technology

In-depth optimization of the smelting process is an important condition for achieving economical aluminum recycling. Aluminum casting in the automotive industry is an example of an increasing number of scrap materials such as aluminum alloy wheel machining chips, turning and drilling scrap, whose bulk density can increase. Varying between 80-720kg / m3 depending on size and shape, this type of waste requires expensive smelting technology in the prior art to be economically processed in-plant

[0003] At present, there are mainly the following methods for the recovery and melting of aluminum chips: first, direct heating and melting, which consumes a lot of energy and causes serious environmental pollution. In addition, the biggest problem is oxidation and burning. For small-sized aluminum chips It is said that the oxidation and burning loss of this melting method is quite serious, resulting in a great waste of resources; second, the aluminum scraps are packed and extruded into blocks and then added to the furnace for melting, although the oxidation and burning loss is much lower than that of aluminum scraps directly added to the melting chamber, But the burning loss rate is still as high as 10-15%; the third is the molten aluminum covering melting technology, which puts aluminum scraps into the furnace, uses high-temperature aluminum liquid as the heat source for melting aluminum scraps, and directly heats aluminum scraps without flames, thereby reducing Oxidation burning loss of aluminum chips, this method is a relatively economical and environmentally friendly recycling method for aluminum chips. It has outstanding advantages in recycling aluminum chips, and its oxidation burning loss can reach ≤4%

[0004] Although the aluminum chips are put into the molten aluminum and melted, the oxidation loss is small, but because the aluminum chips have the characteristics of light weight and large area, the aluminum chips will float on the surface of the aluminum liquid and it is difficult to enter the aluminum liquid, and it is easy to float on the surface and contact with the air. This leads to a large oxidation loss. Therefore, how to make the aluminum liquid quickly cover the aluminum chips and reduce the contact between the aluminum chips and the air to reduce the oxidation loss has become the biggest problem in the recycling of waste aluminum, that is, the sinking of aluminum chips has become the core technology of this problem.

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