Casthouse Cff Filter for Molten Aluminum Purification

15 4月 Casthouse Cff Filter

Posted at 03:37h in Ceramic Foam Filter by admin 0 Comments

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Casthouse Cff Filter is used for casting aluminum ingots and aluminum rods. Ceramic filters have been widely used at home and abroad, saving production costs. In order to achieve the best filtration treatment process, it is very important to configure the filter reasonably.

Gently place the Casthouse Cff Filter into the Casthouse.
The CFF Casthouse should be thoroughly cleaned before using the molten aluminum filter to prevent the residual aluminum liquid from being submerged.
The size of the ceramic foam filter plate used in the aluminum plant should match the filter box, and the matching gap between the two should be as small as possible.
After the aluminum liquid filter is used repeatedly, the filter plate will be deformed, the force of the filter plate will be uneven, and the filter plate will often break suddenly during the filtering process.
Therefore, when the Casthouse is deformed, it should be replaced immediately.

The current market demand for high-grade aluminum alloys is increasing, and end customers have higher and higher quality requirements.
In general, the demand for high-grade aluminum alloys is developing in the direction of thin-walled, high-strength, and easy processing.
Such cast aluminum alloys have increasingly higher requirements for the purity of molten aluminum.
Currently, the most commonly used filtration technology is ceramic foam filtration technology.
The filtering effect of this technology increases as the porosity of the filter plate increases.
Even so, its filtering effect is still far behind the deep bed filter.

Casthouse Cff Filter

For the production of high-end products, deep bed filtration is recommended for process configuration: degassing device + deep bed filtration device + cast ceramic filter.
Ceramic plate filtration is used before casting to avoid media loss due to deep bed filtration, which causes too many inclusions to accompany molten aluminum casting, resulting in a lot of waste.
And according to the output and production plan, consider the corresponding deep bed preheating method (online or offline). The process configuration recommendations for the use of tubular filters: degassing device + tubular filters (at least two parallel), most of the aluminum processing enterprises in Japan use this arrangement.
In order to achieve energy saving and emission reduction and form an “electrolytic aluminum-aluminum processing” industrial chain, some enterprises use electrolytic aluminum liquid as raw materials to produce steel ingots.
Since the impurity composition of electrolytic aluminum is complex and there are many non-metallic slags, it is recommended to use a ceramic filter device before the tubular filter.

The harm of metallurgical defects to aluminum processing deformation production and the mechanical properties of the final product cannot be ignored.
Therefore, attention should be paid to the purification treatment of aluminum melt.
Before the filter is used, the gas and slag content is too high, which will cause the ceramic foam filter to block.
Therefore, adding a degassing device before filtering can make the purification process of liquid aluminum more smooth.

After cleaning the Casthouse, apply a layer of BN refractory to the inner surface of the CFF Casthouse, and then gently place the Casthouse Cff Filter on it.
Correct preheating is an important part of the use of ceramic foam filter plates. Incorrect preheating methods often lead to the following problems:
Preheating of cracks;
The filter plate cannot be started (aluminum liquid cannot pass through);
The pressure head is too high; the filter plate is floating.