SHANXI XINRONG INTERNATIONAL TRADE CO.,LTD

Graphite Electrode

Extra high power graphite electrode

Standard extra high power graphite electrode

High power graphite electrode

Nominal power graphite electrode

Other graphite productions

Graphite electrode

Graphite carbon block

Graphite Electrode

    Graphite electrode is extensively used in electrical arc furnace for steelmaking, finery and mineral thermal furnace of producing ferroalloy, industrial silicon, phosphor and corundum. And it is also used in other electrical arc furnace with electric arc to produce high temperature.
    According to the difference of using power and electricity, it is adopted different raw and processed materials and manufacturing technics to produce. And it can be divided into nominal power graphite electrode, high power graphite electrode, standard extra high power graphite electrode and extra high power graphite electrode.
    Based on the different diameters of electrode, it has different specs of Φ75~Φ600mm. According to the special request of the users, we can process and manufacture graphite electrode and different type of graphite productions.

Extra high power graphite electrode

The technology guide line of graphite electrode

Item		Unit	Electrode diameter（mm）
			Industry standard		Factory standard（UHP）
			300，350，400	450—500	350—400	450—500	550-600
Electrical resistance	Electrode	μΩ.m	≤6.2	≤6.5	4.8-6.0	4.8-6.2	5.0-6.2
Electrical resistance	Nipple	μΩ.m	≤5.5	≤5.5	3.5-4.5	3.8-4.5	3.8-4.5
Modulus of rupture	Electrode	MPa	≥10.5	≥10.0	≥12.0	≥11.0	≥11.0
Modulus of rupture	Nipple	MPa	≥18.0	≥18.0	≥18.0	≥18.0	≥18.0
Modulus of elasticity	Electrode	GPa	≤14.0	≤14.0	≤14.0	≤14.0	≤14.0
Modulus of elasticity	Nipple	GPa	≤18.0	≤18.0	≤18.0	≤18.0	≤18.0
Bulk density	Electrode	g/cm3	≥1.65	≥1.64	1.65-1.72	1.66-1.74	1.66-1.74
Bulk density	Nipple	g/cm3	≥1.72	≥1.70	1.76-1.78	1.76-1.82	1.78-1.82
Ash content	Electrode	%	≤0.3	≤0.3	≤03	≤0.3	≤0.3
Ash content	Nipple	%	≤0.3	≤0.3	≤03	≤0.3	≤0.3
Coefficient of thermal expansion (100-600℃)	Electrode	10-6/℃	≤1.5	≤1.5	1.20-1.40	1.20-1.40	1.20-1.40
Coefficient of thermal expansion (100-600℃)	Nipple	10-6/℃	≤1.4	≤1.4	1.00-1.20	1.00-1.20	1.00-1.20

Limit of electric current of extra high power graphite electrode

Electrode diameter		Interceptive area	Industry standard		Factory standard（UHP）
			Limit of electric current	Electricity	Electrical arc furnace		Finery
			Limit of electric current	Electricity	Limit of electric current	Electricity density	Limit of electric current	Electricity density
In	mm	cm2	A	A/cm2	A	A/cm2	A	A/cm2
14	350	973	20000-30000	20-30	23000-32000	25-33	26000-35000	27-36
16	400	1275	25000-40000	19-30	28000-41000	22-32	31000-44000	24-34
18	450	1622	32000-45000	19-27	34000-48500	21-30	36000-49500	22-31
20	500	2000	38000-85000	18-27	40000-58000	20-29	42000-60500	21-30
22	550	2427	_	_	46000-65000	19-27	49000-70000	20-29
24	600	2892	_	_	52000-75000	18-26	56000-81000	19-28

Standard extra high power graphite electrode

Standard extra high power graphite electrode technology guide line

Item		Unit	Electrode diameter (mm)
			Industry standard Factory standard （SHP）
			300，350，400	450—500	550—600
Electrical resistance	Electrode	μΩ.m	≤6.5	≤6.2	≤6.5
Electrical resistance	Nipple	μΩ.m	≤4.0	≤4.5	≤4.5
Modulus of rupture	Electrode	MPa	≥13.0	≥13.0	≥13.0
Modulus of rupture	Nipple	MPa	≥18.0	≥18.0	≥18.0
Modulus of elasticity	Electrode	GPa	≤12.0	≤12.0	≤12.0
Modulus of elasticity	Nipple	GPa	≤17.0	≤17.0	≤17.0
Bulk density	Electrode	g/cm3	≥1.65	≥1.65	≥1.65
Bulk density	Nipple	g/cm3	≥1.76	≥1.76	≥1.76
Ash content	Electrode	%	≤0.3	≤0.3	≤0.3
Ash content	Nipple	%	≤1.5	≤1.5	≤1.5
Coefficient of thermal expansion (100-600℃)	Electrode	10-6/℃	≤1.2	≤1.2	≤1.2
Coefficient of thermal expansion (100-600℃)	Nipple	10-6/℃	≤1.2	≤1.2	≤1.2

limit of electric current of standard extra high power graphite electrode

Electrode diameter		Interceptive area	Industry standard Factory standard （SHP）
			Electrical arc furnace		Finery
			Limit of electric current	Electricity density	Limit of electric current	Electricity density
In	mm	cm2	A	A/cm2	A	A/cm2
12	300	716	14000-20000	19-28	16000-23000	22-32
14	350	973	18000-26000	18-26	20500-30000	21-31
16	400	1275	23000-33000	18-26	26000-38000	20-30
18	450	1622	27000-42000	17-26	31000-48000	19-29
20	500	2000	32000-50000	16-25	36500-51000	18-28
22	550	2427	35000-55000	14-22	40000-63000	16-26
24	600	2892	37000-60000	13-20	42500-70000	15-24

High power graphite electrode

High power graphite electrode technology guide line

Item		Unit	Electrode diameter (mm)
			Industry standard		Factory standard（HP）	Factory standard（HR）
			200-400	450—500	350-400	450—500	550—600
Electrical resistance	Electrode	μΩ.m	≤7	≤7.5	≤6.8	≤6.5	≤7.0
Electrical resistance	Nipple	μΩ.m	≤6.5	≤6.5	≤5.5	≤5.5	≤5.5
Modulus of rupture	Electrode	MPa	≥10.5	≥9.8	≥11.0	≥12.5	≥11.0
Modulus of rupture	Nipple	MPa	≥14.0	≥14.0	≥18.0	≥17.0	≥16.0
Modulus of elasticity	Electrode	GPa	≤12.0	≤12.0	≤10.0	≤10.0	≤10.0
Modulus of elasticity	Nipple	GPa	≤16.0	≤16.0	≤16.0	≤16.0	≤16.0
Bulk density	Electrode	g/cm3	≥1.60	≥1.60	≥1.64	≥1.64	≥1.64
Bulk density	Nipple	g/cm3	≥1.70	≥1.70	≥1.74	≥1.74	≥1.75
Ash content	Electrode	%	≤0.3	≤0.3	≤0.3	≤0.3	≤0.3
Ash content	Nipple	%	≤0.3	≤0.3	≤0.3	≤0.3	≤0.3
Coefficient of thermal expansion (100-600℃)	Electrode	10-6/℃	≤2.4	≤2.4	≤2.4	≤1.8	≤1.8
Coefficient of thermal expansion (100-600℃)	Nipple	10-6/℃	≤2.2	≤2.2	≤2.2	≤1.5	≤1.5

Limit of electric current of high power graphite electrode

Electrode diameter		Interceptive area	Industry standard		Factory standard（HP,HPz）
			Limit of electric current	Electricity	Electrical arc furnace		Finery
			Limit of electric current	Electricity	Limit of electric current	Electricity density	Limit of electric current	Electricity density
In	mm	cm2	A	A/cm2	A	A/cm2	A	A/cm2
14	350	973	17400-24000	17-24	17500-24500	18-25	20000-28000	21-29
16	400	1275	21000-31000	16-25	21500-31000	17-24	25000-35000	19-28
18	450	1622	25000-40000	15-25	25500-39000	16-24	30000-45000	19-28
20	500	2000	30000-48000	25-27	21000-48000	15-23	36000-54000	18-27
22	550	2427	_	_	34000-56000	14-36	40000-60000	18-25
24	600	2892	_	_	36000-65000	12-22	45000-65000	16-23

Nominal power graphite electrode

Nominal power graphite electrode technology guide line

Item		Unit	Electrode diameter (mm)
			Industry standard		Factory standard（RP）
			250-300	350-500	300-350	400-600
Electrical resistance	Electrode	μΩ.m	≤10.5	≤10.5	≤9.0	≤9.5
Electrical resistance	Nipple	μΩ.m	≤8.5	≤8.5	≤6.5	≤6.5
Modulus of rupture	Electrode	MPa	≥7.8	≥6.4	≥7.8	≥7.8
Modulus of rupture	Nipple	MPa	≥13.0	≥13.0	≥16.0	≥16.0
Modulus of elasticity	Electrode	GPa	≤9.3	≤9.3	≤9.3	≤9.3
Modulus of elasticity	Nipple	GPa	≤14.0	≤14.0	≤14.0	≤14.0
Bulk density	Electrode	g/cm3	≥1.52	≥1.52	≥1.54	≥1.54
Bulk density	Nipple	g/cm3	≥1.68	≥1.68	≥1.70	≥1.70
Ash content	Electrode	%	≤0.5	≤0.5	≤0.4	≤0.4
Ash content	Nipple	%	≤2.9	≤2.9	≤2.8	≤2.8
Coefficient of thermal expansion (100-600℃)	Electrode	10-6/℃	≤2.8	≤2.8	≤1.8	≤1.8

Limit of electric current of nominal power graphite electrode

Electrode diameter		Interceptive area	Industry standard		Factory standard（RP）
Electrode diameter		Interceptive area	Limit of electric current	Electricity density	Limit of electric current	Electricity density
In	mm	cm2	A	A/cm2	A	A/cm2
12	300	716	10000-13000	14-18	11000-16000	15-22
14	350	973	13500-18000	14-18	15000-22000	15-22
16	400	1275	18000-23500	14-18	20000-28000	15-21
18	450	1622	22000-27000	13-17	24000-34000	13-20
20	500	2000	25000-32000	13-16	28000-36000	13-18
22	550	2427			31500-41000	13-17
24	600	2892			38000-46000	13-16

Other graphite productions

Crush

Title	Grain size mm	Fixed carbon %	Ash content %	Sulfur content %	Moisture %
Crush	0-0.5	≥98	≤0.5	≤0.05	≤1.5
Crush	0-18	≥98	≤0.5	≤0.05	≤1.5
The distribution of natural grain size is more than 0.5mm or 18mm. It is no more than 10%。The moisture when leaving factory is no more than 1.5%

Graphite board

Title	Bulk density G/cm3	Electrical resistanceμΩm	Ash content %
Graphite board	Grade I≥1.60 1.45≤Grade II＜1.60	≤10.0	≤0.4
specification（mm）	430X250X50±2, 760X180X38±2. 1100X285X40±2, 1000X60X40±2 1000X40X40±2, If users have the special request to specification，we will make another negotiation.
Request for appearance	Without crack and other impurity on the surface

Graphite lump

Title	Diameter	Fixed carbon %	Ash content %	Sulfur content %
Graphite lump	≥100mm	≥98	≤0.4	≤0.05
Request for appearance	There are no carbonsilicate，furring and other impurity on the surface.

The graphitized coke

Title	Grain size mm	Carbonsilicate %	Fixed carbon %	Ash content %	Volatile matter %	Moisture %	Remark
The large graphitized coke	18 and above	8-14	≥80	≤15	≤2	≤2	The distribution of natural grain size is more than 3mm and it is no more than 10%
The middle graphitized coke	10-18	16-22	≥60	≤30	≤2	≤2	The distribution of natural grain size is less than 18mm and it is no more than 15%
The small graphitized coke	6-10	16-22	≥55	≤35	≤2	≤2	The content of grain size is no less than 90%
The waste graphitized coke	3-6	15-26	≥50	≤40	≤2	≤2	The content of grain size is no less than 90%

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