19 4月 Casthouse Molten Aluminum Filter Medium
Casthouse Molten Aluminum Filter Medium is used to cast 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.
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.
For the production of industrial and architectural aluminum rolled products, such as ingot casting or extrusion round ingot, ceramic filters can only be used in casting to meet product quality requirements. Single-layer filtration or double-layer filtration can be selected according to product requirements.
For the production of high-end products, deep bed filtration is recommended for process configuration: degassing device + deep bed filtration device + Casthouse Molten Aluminum Filter Medium. Ceramic plate filtration is used before casting to avoid media loss due to deep bed filtration, which will cause too many inclusions to accompany molten aluminum during 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.
Filtered with molten aluminum
After cleaning the filter box, coat the inner surface of the CFF filter box with a layer of BN refractory material, and then gently place the foam ceramic filter plate 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.