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Offline adtech  
#1 Gönderildi : 19 Nisan 2022 Salı 03:22:41(UTC)
adtech


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 6.4.2022(UTC)
Mesajlar: 127
United Arab Emirates

Features of Hungary China Foundry Filter

Reduce gas and inclusions in castings.

Reduce the turbulence of molten metal.

Reduce surface defects of castings.

The rejection rate of castings is greatly reduced.

Improve the compressive strength of castings.

Improve the elongation and tensile strength of castings.

Improve the surface finish of castings.

Improve the fluidity of molten metal.

Improve the filling capacity and feeding capacity of the melt.

Reduce machining time and tool wear, and improve the surface quality of castings.

Engineers from Hungary Aluminum talked about the advantages of the application

1. It can effectively remove a large number of inclusions in the aluminum melt, and can effectively absorb a small amount of inclusions.

2. No debris falls off, effectively reducing the pollution of molten aluminum.

3. It has excellent thermal shock resistance and improves the erosion resistance of molten metal.

4. Improve the appearance and performance of the surface and purify molten aluminum.

Hungary Aluminum Company recommends that Adtech aluminum foam filter be used in other aluminum plants in Finland to improve the purity of molten aluminum.

When using the new metal foam filter, slightly larger inclusions in the molten aluminum may pass through the holes of the ceramic filter plate. These “large particle” inclusions inherit and affect the inherent quality of the blank. ceramic foam filters

After the ceramic foam filter has been used for a period of time, some fine particles of impurities will be adsorbed in its pores.

Since the filtering capacity of molten aluminum does not gradually increase, the adsorbed particles continue to accumulate in the pores of the filter plate, making the pores of the filter plate smaller, thereby improving the filtering effect.

However, when the amount of impurities adsorbed by the filter plate is large enough to block the holes of the filter plate, the filtering effect begins to decrease, and the quality of the cast-rolled slab decreases accordingly.

It can be seen from the test pinholes that the secondary filter plate can remove the fine particles in the aluminum melt and has a better purification effect on the aluminum melt.

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Offline adtech  
#2 Gönderildi : 19 Nisan 2022 Salı 07:55:59(UTC)
adtech


Sıralama: Üye

Madalyalar: Yeni üye: 10

Katılan: 6.4.2022(UTC)
Mesajlar: 127
United Arab Emirates

The distinctive material features of expanded graphite rings include:

Low friction coefficient, estimated at a level of 0.1 for wet friction and 0.16 for dry friction

Remarkable chemical resistance against most process fluids, including all fluids used in energy generation

High resistance to nuclear radiation making them eminently suitable for applications in nuclear engineering

Resistance to high temperatures exceeding the resistance of the most common sealing materials

Relatively low cost graphite ring

High resistance to compression

On the negative side, low resistance to tensile and shear forces

It is also significant that in terms of the applications where gland packings are used, our knowledge of this material and our experience is the most extensive. Initially in the seventies, the rings were made directly from expanded graphite particles by filling them into a tool or even by forming directly in the device (pump or valve). In this case, a problem occurred related to the low density of the expanded graphite particles and the high compression set. Because of this graphite foils with a higher density of 0.7 – 1 g/cm³ were used to form rings because they are easier to handle.



Graphite foil is thus currently the basic intermediate product used in the production of graphite gland packings and graphite seals in general. Such foil is supplied by manufacturers of graphite products in different densities (usually 0.7-1.0 g/cm³), carbon contents (in process seals carbon contents of 95- 99.9% of carbon are applied), in different thicknesses (0.3-1.0 mm) and with various modifying additives. Graphite foil materials can also differ in terms of the content of soluble chlorides, fluorides and sulphur, which have an impact on the development of corrosion, and in the amount of traces of rare earth metals which have an impact on the rate of oxidation.

These properties are not always specified by the supplier. While the thickness of the foil or its density may be treated as a purely technological quality, the remaining material characteristics have a fundamental impact on the functionality, durability and operational reliability of a packing.
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