Graphite Electrodes & Nipples

Product Description:

Product Detailed Description

Graphite Electrode Product Introduction

Graphite electrodes are made from petroleum coke and pitch coke as aggregates, coal tar pitch as binder, through raw material calcination, crushing and grinding, batching, kneading, forming, baking, impregnation, graphitization and mechanical processing to produce a high-temperature resistant graphite conductive material, called artificial graphite electrodes (abbreviated as graphite electrodes).

The main raw material is petroleum coke. Ordinary power graphite electrodes can add a small amount of pitch coke. The sulfur content of both petroleum coke and pitch coke cannot exceed 0.5%. When producing high-power or ultra-high-power graphite electrodes, needle coke is also required.

Product Applications

Arc Furnace Steelmaking: Graphite electrodes introduce current, and the arc generates high-temperature heat source for smelting.
Submerged Arc Furnace: Production of industrial silicon and yellow phosphorus, with electrodes buried in the charge, using resistance heat for heating.
Resistance Furnace: Used for graphitization furnaces, glass melting furnaces, and silicon carbide furnaces, with electrodes embedded in the furnace head wall for conduction.
Special-shaped Products: Electrode blanks can be processed into crucibles, molds, boats, heating elements, etc.

Regular Power Graphite Electrodes

Technical Specifications

Item	Unit	Electrode	Nipple
Resistivity ≤	μΩm	9.0-10.5	8.0-9.0
Bending Strength ≥	MPa	6.4-7.8	9.0-10
Elastic Modulus ≤	GPa	9.3	9
Ash Content ≤	%	0.5	0.5
Bulk Density ≥	g/cm³	1.52-1.62	1.56-1.62
Coefficient of Thermal Expansion ≤	×10-6/℃	2.9	2.4

Specifications and Allowable Deviations

Type	Diameter(mm)	Diameter(in)	Length(mm)	Allowable Deviation
Small	75-250	2.95-9.84	1200-1800	±100
Regular	300-600	12-24	1600-2200	±100
Large	780-1200	30.7-47.24	2000	±100

Allowable Current Capacity

Diameter(mm)	Diameter(in)	Allowable Current Capacity(A)	Current Density(A/cm²)
300	12	10000-13000	14-18
350	14	13500-18000	14-18
400	16	18000-23500	14-18
450	18	22000-27000	13-17
500	20	25000-32000	13-16
600	24	30000-36000	12-15

High Power Graphite Electrodes

Technical Specifications

Item	Unit	Electrode	Nipple
Resistivity ≤	μΩm	6.5-7.0	6.0
Bending Strength ≥	MPa	12-15	15-18
Elastic Modulus ≤	GPa	12	14
Ash Content ≤	%	0.3	0.3
Bulk Density ≥	g/cm³	1.68-1.73	1.75
Coefficient of Thermal Expansion ≤	×10-6/℃	2.2	2.0

Allowable Current Capacity

Diameter(mm)	Diameter(in)	Allowable Current Capacity(A)	Current Density(A/cm²)
300	12	13000-17400	17-24
350	14	17400-24000	17-24
400	16	24000-32000	16-24
450	18	32000-40000	16-24
500	20	40000-48000	15-24
600	24	48000-56000	14-24

Ultra High Power Graphite Electrodes

Technical Specifications

Item	Unit	Electrode	Nipple
Resistivity ≤	μΩm	5.0-6.5	4.5
Bending Strength ≥	MPa	14-16	18-20
Elastic Modulus ≤	GPa	12	14
Ash Content ≤	%	0.3	0.3
Bulk Density ≥	g/cm³	1.72-1.75	1.78
Coefficient of Thermal Expansion ≤	×10-6/℃	1.3	1.2

Allowable Current Capacity

Diameter(mm)	Diameter(in)	Allowable Current Capacity(A)	Current Density(A/cm²)
250	10	9200-15100	21-30
300	12	13000-22000	20-30
350	14	20000-30000	20-30
400	16	25000-40000	19-30
450	18	32000-45000	19-27
500	20	38000-55000	18-27
550	22	48000-60000	18-24
600	24	52000-72000	18-24
700	27	62000-95000	18-24

Customization Supported

Custom designs supported according to customer drawings and requirements for different specifications and shapes.