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Carbon Electrode

Carbon electrodes are applied for the production of silicon metal as they have peculiar characteristics. Carbon electrodes are used as electric current conductors in electric furnaces where silicon metal, elemental phosphorus or -to a small extent -other specialties are produced.

  • Product Details

Carbon electrodes are applied for the production of silicon metal as they have peculiar characteristics.


Carbon electrodes are used as electric current conductors in electric furnaces where silicon metal, elemental phosphorus or -to a small extent -other specialties are produced. 


Requirements for carbon electrodes are: 

- good electrical conductivity: in order to withstand the high current density required by the metallurgical process; 

- good thermal conductivity: to minimize the temperature differences inside the electrodes when in use and, consequently to reduce internal stresses; 

- good mechanical strength: to withstand the stresses when in use; 

- high level of chemical purity: to avoid polluting the end product; 

- reliable joint: to ensure current flow continuity in the electrode column;

- easy mounting: to facilitate and speed up operations for the lengthening of the electrode column; 

- accurate machining on the external surface on the joints: to avoid problems when the joint passes through the holding clamps and the contact shoes and to facilitate the current flow from one electrode to the following one. 


Peculiar characteristics of carbon electrodes for silicon metal production are:

- carry large amounts of electrical current

- withstand very high temperatures 

- keeping good mechanical properties under above-described circumstances


Technical specification:

Type

S grade

G grade

Bulk density g/cm3 (min)

1,58

1,58

Resistivity µΩ·m  (max)

35

30

Ash content % (max)

4,5

4,0

Compressive strength MPa (min)

6,5

6,5

CTE 10-6/℃ (max)

4,5

4,0


Diameter mm

Nominal Length

Standard Length

Short Length

max

min

max

min

Φ700/Φ780/Φ800/Φ850

1950

+50

-50

-50

-200

Φ870/Φ900/Φ920/Φ960

1950

+50

-50

-50

-225

Φ960/Φ1020/Φ1060/Φ1140

2550

+100

-100

-100

-275

Φ1060/Φ1140/Φ1272

2850

+100

-100

-100

-275


Diameter (mm)

S-Grade Carbon Electrode

G-Grade Carbon Electrode

Allowable Current Load (A)

Current Density 
(A/CM2)

Allowable Current Load (A)

Current Density 
(A/CM2)

700

25300

6.6

29200

7.6

780

32500

6.6

36200

7.6

800

33100

6.6

38100

7.6

850

36200

6.6

41900

7.4

870

38000

6.4

43900

7.4

900

40600

6.4

47000

7.4

920

42500

6.4

49100

7.4

960

46300

6.4

53500

7.4

1020

50600

6.2

57900

7.1

1060

54600

6.2

62600

7.1

1140

62200

6.1

71400

7.0

1146

62800

6.1

72100

7.0

2405

66100

5.8

76300

6.7

1272

73600

5.8

85100

6.7

1321

73900

5.4

84900

6.2

1400

80000

5.2

92300

6.0


If required, other values of parameters might be agreed upon.

Contact

Head Company: Orient Carbon Group

Telphone: +86 318 2883050

Email: info@orientcarbongraphite.com

             jane.chang@orientcarbongraphite.com

Website: www.orientcarbongraphite.com