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

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Loading Port:
Shanghai
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TT OR LC
Min Order Qty:
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:Graphite is made of high-strength graphite, it is a kind of graphite grade specification.
The difference is: the graphite bar may be machined graphite electrode materials may be insulated with material of graphite. Graphite electrode is an electrode product to guide the processing of graphite material with good electrical properties. Bars are usually cylindrical.
Q:What is the reason that the current cannot be increased when the graphite electrode is used for anode electrolysis?Add calcium chloride and sodium bicarbonate into electrolytic water
The reason is that the resistance increases continuously, the number of ions is limited, and the conductivity is limited
Q:Why should graphite paper be placed between the heater and the graphite electrode?
Determine the thickness of the graphite bowl, the thickness of the graphite bowl is generally 3 mm -6 mm, three, determine the diameter of the heater, according to the diameter of the crucible and the thickness of the graphite bowl, calculate the inner diameter of the heater. The gap in the quartz crucible diameter phi = +2 times is +2 times the wall thickness of stone bowl bowl and graphite heater if the graphite bowl wall thickness is a, graphite bowl gap and heater for B (b=5 mm), phi = Phi Phi +2a+2b= within the outer crucible outer crucible +2 (a+b) four, to determine the effective heater the height after practice, the effective length of the quartz crucible heater is high 1.6 to 1.8 times.
Q:Classification of graphite electrodes
A graphite electrode coated with an antioxidant protective layer (graphite electrode, antioxidant). The utility model has the advantages of forming a protective layer capable of conducting electricity and resisting oxidation at high temperature, reducing electrode consumption (19%~50%) during the steelmaking process of the poly carbon graphite electrode, prolonging the service life of the electrode (22%~60%), and reducing the electric energy consumption of the electrode. The popularization and use of this technology can bring about such economic and social effects:The unit consumption of graphite electrode is less, and the production cost is reduced.The power consumption of the graphite electrode is less, the energy consumption per unit of steelmaking is saved, the production cost is saved, and the energy saving is saved.Because the number of graphite electrodes is changed less, the labor quantity and danger coefficient of operators are reduced, and the production efficiency is improved.Graphite electrode is a kind of low consumption and low pollution product. It has a very important social significance in today's energy saving, emission reduction and environmental protection.
Q:Carbon graphite electrode and what is the difference?
The material is composed of carbon carbon, but without graphite, after molding sintering temperature is only more than 1000 degrees, no graphitization.
Q:The reason why graphite is used as electrode
Good chemical stabilityGraphite has good chemical stability at room temperature. It can resist acid, alkali and organic solvent.
Q:The difference between graphite electrode and graphite rod
The difference between an electrode and a rod is that the electrode has a lead conductor, and the rod is not.
Q:What are the skills of hardfacing process for wear-resistant alloy powder blocks?
The hardfacing of wear-resistant alloy powder block is mostly made by carbon arc surfacing. General selection of graphite or carbon arc surfacing carbon rod and plate electrodes, which has good conductivity, high melting point;
Q:Will the brush grease not short-circuit the commutator?
The reverse pole surface should be clean and dry. Any grease, moisture or dust will destroy the carbon film on the commutator surface. The carbon film can not be formed or destroyed. It is very harmful. Grease material will be embedded in the joint between commutator and commutator. Under the action of electric spark, it will be carbonized and conductive. When serious, it will cause partial short circuit between the reversing pieces and reduce the service life of reversing.
Q:Graphite powder produced by graphite electrode and what we usually call graphite is a kind of thing?
Coal tar pitch as binder is made by calcination, batching, kneading, pressing, roasting, graphitization and machining

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