A purification and crystallization device for ultra-high-purity aluminum
A crystallization, pure aluminum technology, applied in the field of ultra-high-purity aluminum purification and crystallization device, can solve the problem of easy generation of oxides, and achieve the effect of reducing the generation of oxides, avoiding contact, and smoothing the liquid level
Active Publication Date: 2019-12-17
宁波锦越新材料有限公司
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Problems solved by technology
[0008] The present invention designs a crystallization device for ultra-high-purity aluminum, which solves the technical problem that the existing crystallization device cannot keep the aluminum liquid level from being driven while maintaining high-speed rotation, causing the aluminum liquid to contact with the air. easy to produce oxides
Method used
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Embodiment
[0036] Embodiment: Take the purification of 5N aluminum to 5N5 as an example.
[0037] Step 1: Melting a certain amount of 5N aluminum block in a crucible, keeping the temperature at 660-680°C.
[0038] Step 2. Install the purification and crystallization device above the crucible. At this time, the upper rotor 9 and the lower rotor 10 are inserted under the liquid aluminum surface, and the upper rotor 9 is located below the aluminum liquid surface.
[0039] Step 3: 50-100 L / min of normal-temperature air is continuously fed into the crystallization device.
[0040]Step 4: Turn on the rotating motor 3 to continuously rotate the lower rotor 10, control the steering motor 6, so that the upper rotor 9 and the lower rotor 10 rotate in opposite directions, increase the speed to about 80rpm and keep the liquid level from being driven, and rotate During the process, the aluminum liquid with high purity is preferentially solidified due to the cooling action of the crystallization devi...
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The invention relates to a purification and crystallization device for ultrahigh-purity aluminum. The purification and crystallization device is installed above a crucible; and the lower end of the purification and crystallization device extends into a molten aluminum liquid level. The purification and crystallization device is characterized in that the lower end of the purification and crystallization device is provided with an upper rotary body (9) and a lower rotary body (10); the upper rotary body (9) is arranged above the lower rotary body (10) and below the molten aluminum liquid level;and the upper rotary body (9) and the lower rotary body (10) can rotate in same or opposite directions. For the purification and crystallization device, as the lower end is provided with the upper rotary body and the lower rotary body which can rotate in the same or opposite directions, the molten aluminum liquid level is kept not to be driven through reverse rotation of the upper rotary body while a rotating speed of the lower rotary body is ensured, so that the contact between molten aluminum and air is reduced, and the production of oxides is reduced.
Description
technical field [0001] The invention relates to a purification device for metal aluminum, in particular to a purification and crystallization device for ultra-high-purity aluminum. Background technique [0002] Aluminum products with a purity above 5N5 are called ultra-high-purity aluminum. Ultra-high-purity aluminum is widely used in the fields of electronics, aviation, navigation, chemical industry and defense industry, and its consumption is increasing year by year. But now there are very few domestic enterprises that can produce 5N5 ultra-high-purity aluminum that meet the needs of users, and there are only a handful of research and development units. Therefore, almost all ultra-high-purity aluminum needed in China depends on imports. [0003] Although some domestic companies are already in trial production, there is a big gap with similar foreign companies and they cannot meet domestic demand. Therefore, research and development of new production methods to replace imp...
Claims
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IPC IPC(8): C22B21/06C22B9/02
CPCC22B9/02C22B21/06Y02P10/20
Inventor 张瑾大岩一彦姚科科广田二郎周建波叶翔
Owner 宁波锦越新材料有限公司