Alumina Ceramic Foam Filter Aluminum Pakistan has a large aluminum liquid filtering capacity, which can effectively treat a large amount of molten metal continuously produced in the smelting furnace. However, a big problem occurs in the conventional molten metal filtering device equipped with a filtering medium of a flat porous ceramic material.
In a traditional filter device, the molten metal flows down to the filter medium. In the process of switching from one smelting furnace to another or after the filtering operation is completed, when the molten metal flowing from the furnace into the filtering device stops, the molten metal remaining in the filtering device flows out of the filtering device through the filtering device. Filter medium.
Alumina Ceramic Foam Filter Aluminum Pakistan is made of open-cell hydrophilic flexible foam material with multiple interconnected voids, which are surrounded by a flexible foam mesh.
Typical materials that can be used include polymer foams such as polyurethane foam and cellulose foam.
Generally speaking, any combustible organic plastic foam with elasticity and ability to restore its original shape can be used.
The foam must be burned or volatilized below the firing temperature of the ceramic material used.
Likewise, 5 to 100 pores per inch foam should be used to provide the necessary filtering surface.
Of course, the size of the foam material can vary according to the final size required.
The molten aluminum launder between the molds transfers the molten aluminum. The hollow cylindrical structure is preferably used for filtering molten aluminum through a downpipe. In either case, the height of the filter medium must exceed the height of the molten metal to be filtered.
Under normal circumstances, the granular refining agent is added to the aluminum liquid first, and the slag removal treatment is carried out after the full reaction.
Before the aluminum liquid filter device is a degassing tank, which is used to remove hydrogen from the aluminum liquid.
Finally, after passing through the filtering device, the impurities in the aluminum melt are filtered out.
Especially in the case of using a molten aluminum ceramic filter, after long-term use, the pores will be blocked by sodium chloride adsorbed on the surface.
Therefore, Alumina Ceramic Foam Filter has a multilayer network structure. The pore size decreases along the flow direction of the liquid aluminum. By setting the particle size of the granular material, the granular material can be continuous or stratified in the flow direction of the aluminum melt, and the same effect can also be achieved, that is, a longer service life can be obtained from the filter.