Ceramic Foam Filter Suppliers Australia is determined according to the content of impurities in liquid aluminum, the flow rate of molten castings and the final quality requirements of cast products.
1. There are many impurities and the casting quality is general. Large mesh foam ceramic filter plate is optional. Add glass fiber cloth coarse filter in front of filter plate.
At this point, it is important to filter semi-continuous castings with fiberglass cloth first. When the hole is opened, the slag and slag washed down by the flow groove can be intercepted to prevent the blockage of the filter plate.
2, the casting product quality requirements are high, the use of new small mesh foam ceramic filter, that is, large mesh. For example, AdTech ceramic foam filter plates use a THREE-DIMENSIONAL network structure and organic bubbles connected to pores as carriers for thixotropic invasion. In the alumina slurry, the square center correction automatic extrusion process is adopted to make the slurry evenly coated on the carrier foam framework, and the high temperature baking curing at 1180℃.
The aluminum alloy liquid impurities installed in the filter box can be filtered to meet the production of aviation, transportation and other aluminum alloy precision castings with high added value and high technical performance.
3, the choice of filter plate specifications depends on the melt flow rate and total flow. If the flow rate is large, the total amount of passage is large, and the aperture of the filter plate is small, the larger size is selected.
Ceramic Foam Filter Suppliers Australia also depends on the colour of the Filter board when choosing the Filter board, patting its body and burning its contents.
1, the color is pure, no impurities, indicating that the material is uniform; If the hand is not sticky, it means that the surface is not sprayed with glue and will not cause secondary pollution.
2, one hand holding the filter plate, the other hand beating the filter plate, constantly dripping ceramic slag, indicating the poor quality of the filter plate, will cause secondary pollution to liquid aluminum.
3, with open fire or electric heating red, immediately cooled at room temperature, no crack, no slag, that is a good filter plate.
When purchasing filter materials, the effective specific surface area or porosity calculation of foam should be carefully evaluated.
Observe the uniform state of mesh on the surface of the filter plate, and then observe the uniform state of mesh on the cross-section of the filter plate.
If possible, the porosity can be calculated using the drainage method.
The three-dimensional mesh is uniform and the porosity is large. It is a kind of foundry ceramic filter plate with excellent performance.