Do you know the reasons of aluminium melt liquid pollution?

On the one hand, in the smelting process, aluminum is exposed to the furnace atmosphere in a molten or semi-molten state, easy to oxidize, easy to react with water vapor and absorb hydrogen, easy to form various forms of non-metallic slag (such as furnace lining debris, chloride, carbide in flux, etc.) and coarse metal intercompound particles and so on. 

On the other hand, part of the waste that makes up the charge brings some non-aluminum impurities into circulation.

What is the influence when aluminium liquid is polluted?

Because the waste is coming from the process waste and scrap during each process in factory and the waste outside the factory, so, the composition is complex due to different ways as well as the quality is poor.

These impurities often make the billet produce bubbles and inclusions, which seriously affect the purity of the metal melt, thus further affect the processing properties, mechanical properties, corrosion resistance and the appearance quality of the product.

How to solve the said influence?

Alumina foam ceramic filter plate can effectively remove all kinds of inclusions with fineness up to micron level in aluminum liquid, make aluminum liquid into a steady laminar flow, which is conducive to filling. 

It has a unique mullite-corundum structure, good mechanical strength and chemical stability, excellent resistance to aluminum liquid erosion performance.

It can obtain stable filtration effect by strict control of hole size and through hole rate.

The ceramic foam filter plate is surrounded by a sealing ceramic fiber liner, which facilitates the seal of the filter plate in the filter box to ensure that there is no metal liquid sideflow.

The product is mainly used in the purification process of aluminum and aluminum alloy production, but also used as a variety of gas-solid, liquid-solid separation media, catalyst carrier, burner and sound absorption and environmental protection fields.

How to choose the suitable alumina Ceramic foam filter plate?

First of all, according to the impurity content of aluminum melt, melt transfer flow rate of the final casting product quality requirements.

The plate with a large hole mesh can be chosed when a lot of impurities contained and normal quality of casting products required.

New type plate with small holes can be selected when the quality requirements of casting products are high.

HEBEI CANGCHEN Brand alumina ceramic foam filter plates adopt the organic bubble body with three-dimensional network structure and connected pores as the carrier, which is penetrated into the thixotropic alumina slurry, and adopts the automatic extrusion process with four square correction center distance, so that the slurry is evenly coated on the carrier bubble skeleton, and is roasted at 1180℃ after drying and curing. Installed in the filter box for aluminum alloy liquid impurities filtration, to meet the production of high value-added, high technical performance of aviation, transportation and other aluminum alloy precision casting. Such as: computer hard disk, printing with PS board base, can material, jet turbine engine fan blades and other products, to achieve the ideal cleanliness, to obtain good results.

Depends on the flow rate and total amount of melt through.

Secondly, look at its color, shoot its body, burn its things during select the filter plate.

The color is pure and no impurity that means the material is uniform; The hand is not sticky thatmeans the surface is not sprayed with binder, which will not cause secondary pollution.

Holding the filter plate with one hand and clapping with the other hand, if the ceramic particles continuously drop when beating the filter plate, it means that a poor quality filter plate, which will cause secondary pollution of liquid aluminum.

Use an open flame or electric heating to burn red and make it cooled at room temperature immediately without cracking slag, it is a good filter plate.

Thirdly, The effective specific surface area or porosity calculation of the foam should be carefully evaluated when selecting.

The mesh homogeneity of the surface layer of the filter plate can be observed, and then the mesh homogeneity of the cross section can be observed.

If possible, the porosity can be measured by drainage method.

The three-dimensional mesh is homogeneous, the porosity is relatively large, means it is an excellent foam ceramic filter plate.

User Manual

1. Clean filter box

2. Gently put the filter plate into the filter box, and press the sealing gasket around the filter plate by hand to prevent the flow of molten aluminum.

3. Evenly preheat the filter box and filter plate to make it close to the temperature of the molten aluminum. Preheat to remove moisture and facilitate initial instant filtration. Preheating can be carried out using electric or gas heating. Under normal circumstances, it takes about 15--30 minutes.

4.Pay attention to the change of the aluminum hydraulic head during casting. The normal initial pressure head is 100-150mm. When the molten aluminum begins to pass, the pressure head will drop below 75--100mm, and then the pressure head will gradually increase.

5.During the normal filtration process, avoid knocking and vibrating the filter plate. At the same time, the launder should be filled with molten aluminum to avoid too much disturbance of the aluminum liquid.

6.After filtration, take out the filter plate in time and clean the filter box.

Quality Inspection

Three most important key points that make our quality always best are:

● The most advanced testing equipment and technology are adopted today in Hebei Cangchen to ensure the consistant filters quality. 

● There is a quality inspection team with rich experience and technology to keep best quality in our quality control department.

● Thanks to many years of product export and feedback information from domestic and foreign customers, we have accumulated considerable experience and expertise in quality control and improvement.

Certificate

For now, Hebei Cangchen is a professional manufacturer with ISO certificate and our Alumina ceramic foam filters have been passed RoHS And Reach test and certified.