Shaped articles of graphite

Graphite products

Crucibles, capsules, lids, and other auxiliary graphite supplies to work with samples (sampling of liquid and solid samples, melting and sintering of the samples) manufactured according to customer's drawings. Shaped graphite products used in various industries and manufactured according to customer's drawings.

Crucibles
The graphite crucibles contain up to 0.5% ash impurities, conductive and can be used mainly in vacuum and high-frequency furnaces or in furnaces for smelting of ferrous and non-ferrous metals, semiconductor, noble and other metals, that is, in furnaces operating in a protective gas atmosphere at a temperature of about 2500°C.

Artificial graphite material loses its mechanical strength at 2800-3000°C and evaporated in vacuum at a temperature of about 2300°C, but is oxidized in air at about 600°C. Therefore, the crucibles graphite is not suitable for use in open hearth or other furnaces, where the heating and melting is hard fuel, gas or oil burner with an oxidizing flame. To work in these outdoor ovens are used fireclay graphite crucibles, which are made forming a mixture of fireclay, graphite and refractory clay.

Crucibles, and other articles made of artificial graphite, made machining extruded, and then calcined and graphitized blanks consisting of petroleum coke and coal tar pitch.

The graphite crucibles are made of four basic types: conical, cylindrical, shaped and special. Graphite crucibles of artificial graphite can be used in high-frequency furnaces instead of printed crucibles. It is known that stuffing and roasting molded and quartz or fireclay crucibles it takes about three hours, thereby significantly reduced the performance of high-frequency furnace.

Thanks to the use of carved crucibles made of artificial graphite material at some plants is accelerated melting of metal and extend their service compared to printed.
When translating a high-frequency induction furnaces with printed crucibles with a capacity of up to 500 kg with an outside diameter of up to 480 mm graphite, machined from the pressed blanks artificial graphite, can significantly increase the furnace capacity and improve the quality of steel produced.

Conical crucibles are used primarily for manual casting metal (capture with this casting rests against the tapered portion of the crucible).

Cylindrical crucibles are used in high-frequency furnaces, of which the casting metal is performed by tilting the furnace.

Shaped crucibles are used for melting ferrous and non-ferrous, semiconductor metals and alloys. Thanks malosolnoy and good electrical conductivity of these the crucibles can be used to contact the electric smelting of precious metals.

Special crucibles can be used for melting non-ferrous and noble metals, smelting semiconductor metals with stirring the mixture, in the form of form the moulds for casting of laboratory samples and for melting precious metals.

In nonferrous metallurgy using graphite crucibles with different capacities. Apply them in direct heating stoves, electric stoves with protective atmosphere or in vacuum at temperatures up to 2500 degrees. Use graphite crucibles with the molten zinc, aluminum, copper and other metals, and their alloys.

Induction furnace

The most common method of metal melting consider using induction furnaces. The heaters in these furnaces are crucibles of graphite, heated due to the induced current. Induced current heats the crucible and the metal that was placed in him. The relatively low cost of electricity and little time melting in such furnaces.

The advantage of the induction furnace, which use graphite crucibles is willingness to work, ability to quickly replace the insulation between the crucible and tube inductor, long service life, high temperature and low cost of maintenance.

Graphite, which is used for induction crucibles:
 

• Graphite brand EGP - graphite grade EG impregnated. He is a little stable conventional graphite electrode. Undoubted advantage, which have graphite crucibles of this brand is its low cost, lack - krupnodernytsi graphite (grain size from 2 to 4mm) and a low resistance to oxidation - grain graphite into the melt;

• Brand graphite EGP - graphite this brand with impregnation. He has greater stability than conventional graphite electrode. Dignity graphite crucibles of this brand is considered a low price, and the lack of large grains of graphite (from 2 to 4 mm) and low resistance to oxidation, so as to melt fall grain graphite;

• Brand graphite MPG - dense and fine-grained (0.025 mm) graphite. It has high resistance to oxidation;

• Brand graphite MG is graphite domestic production with small grains (0.8 mm). When using this graphite all the products have a high resistance;

We manufacture graphite crucibles diameters from 7 to 700 mm Manufacturer it is possible according to customer's drawings.

Heaters, Pipes, Screens, Rings, tArcevia, seals, Pumps, baths, and the crucible for sintering hard alloys, Molds, Moulds, Spinneret,