25 2月 Ceramic Foam Filter Al2O3
appeared in the 1970s, and the use of ceramic foam filter plates is the most effective way to remove inclusions in aluminum melt.
As for the metal filter screen and fiber cloth filtration, it can only remove the large inclusions in the aluminum alloy melt, but the inclusions below the micron level cannot be removed, and the metal filter screen will also pollute the aluminum alloy.
The foam ceramic filter plate can filter out fine inclusions and significantly improve the mechanical properties and appearance quality of the castings. It is the first choice for the melting and casting workshop.
Ceramic Foam Filter Al2O3 filtration principle
The ceramic foam filter plate has a multi-layer network and multi-dimensional through holes, and the holes communicate with each other. When filtering, the molten aluminum carries inclusions and flows along the tortuous channels and pores, and is directly intercepted, adsorbed, deposited, etc. when it comes into contact with the foamed framework of the filter plate. When the melt flows in the hole, the channel of the Foundry Filter is curved, the melt flowing through the channel changes the flow direction, and the inclusions collide with the hole wall anvil and firmly adhere to the hole wall.
A molten metal filter medium made of a porous ceramic material and formed into a flat plate shape has been proposed.
The filter medium has a large filtering capacity of molten aluminum, and can effectively treat a large amount ofmolten metal continuously produced in a smelting furnace.
However, a large problem has occurred in the conventional molten metal filtering device equipped with a filtering medium of a flat porous ceramic material.
In recent years, China has also researched some new technologies for purifying molten aluminum, such as dynamic vacuum processing, continuous ultrasonic degassing purification and corundum ceramic filters, which have achieved good results.
However, these process methods are relatively complicated and costly, and it is difficult for them to be widely promoted in Shangye cattle production.
As for the metal filter screen and fiber cloth filtration, only large inclusions in the aluminum alloy melt can be removed, but the inclusions below the micron level cannot be removed, and the metal filter screen will also pollute the aluminum alloy.
The foam ceramic filter plate can filter out fine inclusions and significantly improve the mechanical properties and appearance quality of the casting.