Graphit Electrode with Type RP, HP, UHP Used for Smelt

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Shanghai
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100 m.t.
Supply Capability:
20000 m.t./month

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Product Description:

               Graphit Electrode with Type RP, HP, UHP Used for Smelt

1. Product Introduce:

Graphit Electrode is made from the domestic first petroleum coke and high quality needle coke and widely used in the electric arc furnaces for production of alloy stees, metal and other nonmetallic materials, etc. 

2. Types of Graphit Electrode:

Graphit Electrode include: regular power, high power, ultra high power and square electrode.

3. Size:

The range of diameter covers from 300mm to 800mm.

4. Characteristics:

  • Low electric resistivity

  • Good electric and thermal conductivity

  • High oxidation resistance

  • Greater resistance to thermal and mechanical shock

  • High mechanical strength

  • High machining accuracy.

5. Specifications

1.Physical and chemical index

Item

Unit

RP

HP

UHP

250-400

450-800

300-400

450-700

300-400

450-700

Electric

Resistivity

Electrode

μΩ.m

7.5-8.6

7.5-8.8

5.5-6.8

5.5-7.0

4.6-6.0

4.8-6.2

Nipple

4.5-5.5

4.0-5.0

3.5-4.5

Bending

Strength

Electrode

MPa

≥8.0

≥11.0

≥11.0

Nipple

≥15.0

≥16.0

≥18.0

Elastic

Modulus

Electrode

GPa

≤9.0

≤11.0

≤13.0

Nipple

≤13.0

≤14.0

≤15.0

Bulk

Density

Electrode

g/cm3

1.55-1.65

1.63-1.73

1.65-1.75

Nipple

1.70-1.75

1.73-1.80

1.75-1.82

Ash

Electrode

%

≤0.3

Nipple

CTE

(100-600)℃

Electrode

10-6/℃

2.00-2.50

1.80-2.00

1.30-1.50

Nipple

1.50-1.80

1.50-1.80

1.20-1.40

 

2.Recommended current carrying capacity

Nominal Diameter

(mm)

RP

HP

UHP

Current

Carrying

Capacity

Current

Density

Current

Carrying

Capacity

Current

Density

Current

Carrying

Capacity

Current

Density

in

mm

A

A/cm2

A

A/cm2

A

A/cm2

12

300

1000-13000

14-18

13000-174000

17-24

15000-22000

20-30

14

350

13500-18000

14-18

17400-24000

17-24

20000-30000

20-30

16

400

18000-23500

14-18

21000-31000

16-24

25000-40000

19-30

18

450

22000-27000

13-17

25000-40000

15-24

32000-45000

19-27

20

500

25000-32000

13-16

30000-48000

15-24

38000-55000

18-27

22

550

32000-40000

13-16

35000-55000

14-22

42000-64000

17-26

24

600

35000-41000

13-15

41000-61000

14-21

50000-73000

17-25

28

700

39000-48000

10-12

55000-82000

14-21

67000-99000

17-25

32

800

43000-54000

8-10

/

/

/

/

 

 

 

3.TOLERANCCES OF ELECTRODE DIAMETERS AND LENG THES (MM)

Nominal Diameter

Actual Diameter

Length

in

mm

max

min

Black surface min

12

300

307

302

299

1800/2000

14

350

357

352

349

1800/2000/2200

16

400

409

403

400

1800/2000/2200

18

450

460

454

451

1800/2000/2200

20

500

511

505

502

2000/2200/2400

22

550

562

556

553

2000/2200/2400

24

600

613

607

604

2200/2400/2700

28

700

714

708

705

2400/2700

29

800

815

809

806

2700/3000

 

 

4.SIZE OF TAPER-THREAD NIPPLES AND SOCKETS(MM)

Nominal Length

Standard Deviation

Deviation of the short scale length

1800

+100

-100

-100

-275

2000

+100

-100

-100

-275

2200

+100

-100

-100

-275

2400

+100

-100

-100

-275

2700

+150

-150

-150

-300

3000

+150

-150

-150

-300

FAQ

  1. Why do the normal eletrodes existe broken situation?

    There are several reasons, but two are more important:

    a. The power is too high, and the electrode can't suport it;

    b. The connection between two parts is not good.


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Q:I used 12V direct current, graphite electrode electrolysis sodium sulfide solution, the anode produced a large number of black material, this is why ah?
Is this principle. Graphite is a layer, each layer, each carbon is SP2 hybrid, and around three carbon connected, finally, between layer and layer formed delocalized covalent bond, making layer and layer can be connected. However, the delocalized covalent bond is not very stable, in attracting Yang Jizheng charge, delocalized covalent bond will certain destruction, the force between the graphite layer and the layer becomes small or not, so as to open.The black stuff is graphite
Q:How does graphite produce solar cells?
Gerrit J said: "despite the modifications, but the inherent nature of graphene remains unchanged, is a significant advantage of composite materials."
Q:How to improve the efficiency of graphite electrode milling, please tell me
When the tool is broken, it will not only stop the continuous processing of the steel, but also affect the quality of the product, which will lead to the scrap of the parts and the waste of the material. Considering the foreseeable future, the graphite electrode will occupy a high position, usually used equipment for processing graphite electrode the highest efficiency mold manufacturers will unremittingly, expand and between those determined to use the hard steel processing manufacturer competition gap. The foundation of micro cutting tools, in terms of graphite electrodes, is one of its most magical words: "high speed."". The spindle speed of the high speed machining center is up to 30000~60000r/min, and the feed speed can be increased to shorten the processing period and improve the quality of the surface and edge. The motor needed to drive this type of spindle is relatively small and light, which helps to reduce cutting power and reduce tool breakage. This is critical because many of the electrodes are complex, and their production involves small, easily broken micro tools (see Figure 1).
Q:Graphite electrode press device
Graphite electrode is mainly in the petroleum coke and needle coke, coal tar pitch as binder, calcination, mixing, kneading, pressing, baking and graphitization, and made the processing machine, is a conductor in an electric arc furnace to form arc release electricity for heating and melting of the charge, according to the quality index level, can is divided into ordinary power, high power and ultra high power.
Q:Please senior doubts. The graphite electrode is used in the mold cavity In what case is graphite processing taken?
Because of the great loss of graphite electrode in finishing, it is not suitable to be used as finishing electrode material. Because of the small coefficient of thermal expansion of graphite, it can also be used as a big electrode material in perforation processing.
Q:What are the factors that affect the electrode wear rate of machine tools?
Effect of processing voltage on electrode wear. The processing voltage is the average voltage between the discharge time and the gap. When the voltage is lower than the power supply voltage (voltage) 25%, electrode loss will increase, which is due to the electrode and the workpiece is too close, the discharge column energy is too large, the electrodes generate heat radiation is too strong, at the same time, there are a large number of continuous arc discharge. But the working voltage is too high (partial load processing), bad conditions of thermal effect in the gap, is not conducive to the adsorption of copper electrode of carbon graphite, destroy the covering effect. Similarly, the electrode loss increase, therefore, corresponding to different processing standards should be selected to adjust the discharging gap voltage.
Q:What is anodized graphite?
According to the production method of brush, there are two kinds. One is colored brush, that is, metal graphite brush. One is black brush. The black brush is made of petroleum coke, pitch coke, carbon black, charcoal and natural graphite powder and so on. Some binders (such as coal tar pitch, coal tar and artificial resin etc.) are added to the black brush. The resin binder by curing brush manufactured for high resistance brush, and the calcined product called carbon brush and graphite brush (with natural graphite as the main raw material) graphitised after product called electrographite brush,
Q:Classification of graphite electrodes
Allows the use of current density of less than 17A/ cm 2 graphite electrode, mainly used for steelmaking, smelting silicon, yellow phosphorus and other ordinary power furnace.
Q:What are pyrolytic graphite electrodes used for?
The weight is lighter: the density of graphite is only 1/5 of copper. When the large electrode is used for EDM, it can effectively reduce the burden of machine tools (EDM). It is more suitable for applications on large moulds.
Q:Graphite can be used in acid towers in chemical plants because of graphite
Ultra high power graphite electrode. A graphite electrode that allows current densities greater than 25A/ cm 2 is allowed. Mainly used in ultra high power steelmaking arc furnace

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