Graphite Electrode Activation UHP HP RP Electrode for Electric Arc Furnace

• Type: Graphite Electrodes
• Composition: SiC
• Carbon Content: High-Carbon
• Grade: UHP
• Forming Way: Extruded Graphite
• Crystal Morphology: Compact Crystalline Graphite
• Transport Package: Wooden Cases
• Trademark: FK
• Origin: China
• HS Code: 8545110000
• Production Capacity: 50000kg/Day

Product Description

Product Description

DESCRIPTION

UHP graphite electrode is used for the recycling of steel in the electric arc furnace industry. Its main ingredient is high-value needle coke which is made from either petroleum or coal tar. Graphite electrodes are finished with a cylinder shape and machined with threaded areas at each end. In this way, the graphite electrodes can be assembled into an electrode column using electrode nipple.
In order to meet the requirement of higher work efficiency and lower total cost, large capacity ultra-high power arc furnaces are becoming more and more popular. Because of this, UHP graphite electrodes with diameters of over 500 mm will dominate market.

Basic Info.

Model NO.
UHP550
Certificate
ISO 9001
Application
Melting
Ash
0.3%Max
Resistance (μΩ.M)
4.6-5.8 μΩ.M
Flexural Strength
10-14MPa
Length
2100-2400mm
Nipple Type
3tpi 4tpi 3tpil 4tpil
Brand Name
hongkuo
Transport Package
Wooden Cases
Specification
UHP550
Trademark
HONGKUO
Origin
China
HS Code
8545110000

FEATURE

Withstand large currents, high discharge rate.Good dimension stability, not easy to deform.Resistant to cracking & spalling.High resistance to oxidation and thermal shock.High mechanical strength, low electrical resistance.High machining accuracy, good surface finishing.

APPLICATION

Graphite electrodes are widely used for production of alloy steels, metal and other nonmetallic materials, etc.DC electric arc furnace.AC electric arc furnace.Submerged arc furnace.Ladle furnace.

SPECIFICATION

Table 1: Technical Specification of UHP Graphite Electrode

	Resistance	Density	FlexureStrength	ElasticModulus	AshContent	CTE	CurrentLoad	CurrentDensity
(inch)	(≤,µ·m)	(≥,g/cm3)	(≥,MPa)	(≤,GPa)	(≤,%)	(100°C-600°C)	(A)	(A/cm2)
						(≤,10-6/°C)
10				14			8100-12200	20-30
12				14			15000-22000	20-30
14				14			20000-30000	20-30
16				14			25000-40000	19-30
18				14			32000-45000	19-27
20			11	14			38000-55000	18-27
22			11	14			42000-66000	17-26
24			11	14			49000-76000	17-26

Table 2: Graphite Electrode Size & Tolerance

Diameter(mm)					Length(mm)
NominalDiameter		ActualDiameter			NominalLength	Tolerance	ShortLength
(inch)	(mm)	(max.)	(min.)	(roughspot)
10	250	256	251	248	1600/1800	±100	-275
12	300	307	302	299	1600/1800
14	350	357	352	349	1600/1800
16	400	409	403	400	1600/1800/2000/2200
18	450	460	454	451	1600/1800/2000/2200
20	500	511	505	502	1800/2000/2200/2400
22	550	562	556	553	1800/2000/2200/2400
24	600	613	607	604	2000/2200/2400/2700

SURFACE QUALITY

There should be less than two defects or holes on the electrode surface, the maximum size of which is mentioned in the below chart.There should be no transverse crack on the electrode surface. For the longitudinal crack, the length should be less than 5% of the electrode circumference and the width should be 0.3 to 1.0 mm.The width of black area on electrode surface should be less than 1/10 of the electrode circumference and the length should be less than 1/3 of the electrode.

SpecificationDefectDimension	NominalDiameterofGraphiteElectrode(mm)
	300-400	450-600
Diameter(mm)	20-40	30-50
	(<20mmshouldbenegligible)	(<30mmshouldbenegligible)
Depth(mm)	5-10	10-15
	(<5mmshouldbenegligible)	(<10mmshouldbenegligible)

Guidance of Using
Being hard and brittle ,artificialgraphite electrode shall be specially handled.Proper operationg may reduce the consumption and cost.
1. Professional tools should be used for hoisting graphite electrodes. It is strictly forbidden to use a crowbar to prevent impact damage during handling.
2. Graphite electrodes are prohibited from rain, snow and water, and should be kept dry. If it is found to be damp, it should be dried before use, the temperature should not exceed 100 ºC, and the drying time should not be less than 48h.
3. Do not stack near debris such as clay, slag, etc., so as not to pollute the surface of the graphite electrode and affect the conductive effect.
4. Before the graphite electrode is connected, carefully check whether the electrode connector hole is intact, whether the connector thread is damaged, and whether the connector bolt is lost. When the electrode is lifted, the electrode connector thread of the ground terminal should be prevented from being damaged.
5. Dust and debris in the joints and joint holes should be blown dry with compressed air.
6. Graphite electrodes must be tightly connected, and no tilt is allowed during connection. Torque wrenches should be used to prevent excessive force or too small, and the gap is not greater than 0.4mm.
7. The electrode holder should be clamped, not loose and in good contact, and no arc should be generated. Otherwise, the connection will be reddish, oxidized, thinned and broken.
8. If the electrode is lifted with a metal lifting plug, the thread in the joint hole must not be damaged. After lifting, the lifting plug should be unscrewed to prevent dust and debris from falling into the joint hole.
9. When the electrode lifting device of the electric furnace is running, it should be kept stable. After the furnace cover is repaired, check whether the furnace cover is positioned correctly. During smelting, refractory materials are used to close the furnace lid to prevent the oxidation of the upper electrode of the flame in the furnace.
10. The holder should be clamped outside the safety wire of the electrode connector hole area.
11. When distributing the molten pool, the big piece is at the bottom and the small piece is at the top. Do not place the charge with poor conductivity on the top. During melting, the unmelted charge should be handled in time to prevent the collapsed material from breaking the electrode.

Company Profile
Hebei Fangke New Material Technology Co., Ltd, was founded on May 29th, 2000 in Hebei, is the largest high-tier lubricant manufacturer and marketer in China with a production capacity of over 1.46 million tons of packaged lubricants per year. Many more sales subsidiaries all over the world, , , It integrates the function of lubricant manufacturing, research, storage, transportation, sales and service. 





Production Facilities



Quality Assurance & Control
· National Certified Laboratory
· Key testing instruments, including: specific resistor, bulk density meter, elasticmodulus    meter, bending strength inspector, ash analysis meter, CTE analysis meter, etc.
· On-time instrument calibration
· On-site properties testing, including:
   L-CTE,C-CTE
   Specific resistance, bulk density,
   Bending strength, ash content, elastic modulus


Technical Specifaication:

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)ºC	Electrode	10-6/ºC	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

Current Carrying Capacity

Nomina diameter		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	10000-13000	14-18	13000-17400	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	/	/	/	/

FAQ
Q:Are you a trading company or manufacture
A;FK is a large-scale central governmental industrial group with its own manufacturing sector, research and development sector, trading sector and logistics sector.

Q:I have some special requirement about specifications.
A:We have a well-rounded product range, which endows us with the capability of applying many special specifications. Please feel free to contact us with yours.

Q:Do you accept OEM service?
A:Yes, we do.

Q:What is your delivery time?
A:It depends on the size/complexity of your order and our own production schedule. Usually we provide a faster delivery than the industry's average.

Q:What is the payment term?
A:Our payment terms are negotiable.

Q:Can I have my own logo on the product?
A:Sure, we can apply your own logo on the products according to your requirement.