Electric Arc Furnace UHP Graphite Electrode for Ladle ...

Graphite Electrodes

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* High density, high temperature resistance, high mechanical strength and strong chemical stability.

* The surface can be treated with anti-oxidation.

* Corrosion resistance, strong acid and alkali resistance.

* Excellent thermal shock resistance, electrical conductivity and thermal conductivity.

* Strong wear resistance and lubricating performance.

* Long service life.

Specification 

ITEM

 

Regular power

High power

Ultra High Power

UNIT

3-24inch

4-24inch

14-24inch

12-20inch

22-28inch

 

φ75-600mm

φ100-300mm

φ350-600mm

φ300-500mm

φ550-700mm

Resistivity

Electrode

μΩ·m

7.0-9.0

5.8-6.8

5.5-6.5

4.8-5.8

4.5-5.5

Nipple

4.0-4.5

4.0-5.0

3.5-4.0

3.0-4.0

2.5-3.5

Bending stregth

Electrode

Mpa

8.0-12.0

9.0-12.0

10.0-14

10.0-15.0

12.0-16.0

Nipple

19.0-22.0

16.0-20

20.0-23.0

20.0-24.0

22.0-25.0

Elastic Modulus

Electrode

Gpa

7.0-11.0

8.0-12.0

8.0-12.0

9.0-13.0

10.0-14.0

Nipple

12.0-14.0

You will get efficient and thoughtful service from Zhongsheng.

12.0-15.0

14.0-16.0

15.0-18.0

16.0-19.0

Bulk density

Electrode

g/cm3

1.60-1.65

1.68-1.70

1.68-1.72

1.70-1.75

1.70-1.75

Nipple

1.75-1.8

1.78-1.82

1.78-1.82

1.78-1.85

1.8-1.85

Ash

Electrode

%

0.3

0.3

0.3

0.2

0.2

Nipple

 

Electrode

10-6/ºC

2.0-2.4

1.6-2.0

1.6-1.9

1.1-1.4

1.1-1.4

CTE

Nipple

100-600ºC

1.8-2.2

1.1-1.5

1.1-1.4

0.9-1.2

0.9-1.2

Product Show 



Application 


Packing & Delivery


Certificate   


Company Profile

Shijiazhuang Nalai Biotechnology Co., Ltd

Provide high quality Graphite electrode, Graphite electrode mainly petroleum
coke, needle coke as raw material, coal pitch as binder, calcination, ingredients, kneading, molding, baking and graphitization,

machining, made of, can be divided into ordinary power, high power and high power, mainly used in steel smelting electric arc furnace and refining furnace smelting furnace, electric furnace steelmaking is the use of graphite electrode in furnace to import
he current, strong current in the lower electrode by gas arc discharge, use the heat generated by the arc for smelting.Graphite electrodes of different diameters are used according to the capacity of the electric furnace. For continuous use of the electrodes, the electrodes are connected by the threaded joint of the electrodes. The graphite electrode used in steelmaking accounts for about 70 ~ 80% of the total graphite electrode consumption

If you need, please feel free to contact us. We will provide you with the most competitive price, high quality and excel service.,
etc

Factory & Workshop


FAQ 

Q: Where can I get product and price information?

A: Send us inquiry , we will contact with you when we receive your ,or contact me on chat app.

Q: What is the term of the delivery?

A: FOB, CFR, CIF, etc.

Q: How to delivery the goods? A: We deliver

the goods by truck to port, or loading in container in factory.

Q: Are you trading company or factory?

A: We are direct factory
and have the most advanced machine and about 100 employee in our m2 workshop.

Q: What's the minimum order quantity?

A: 20tons, one 20' fcl.

Q: What's the delivery time?

A: 2-3 weeks after got the deposit.

What is EDM Graphite?

EDM (Electrical Discharge Machining) graphite should actually be called Graphite used for EDM. While there are many companies, Entegris l Poco, Toyo Tanso, as examples, that manufacture graphite used in EDM, all the materials produced have additional uses outside of EDM. The reason these materials are referred to as EDM graphite is the fact that they all work well in the EDM process.

Why do the graphite materials often referred to as EDM graphite work well in the EDM process?

To answer this, first we need to identify what the EDM process is asking of the graphite during machining operation.

A graphite electrode attached to an EDM machine approaches a conductive workpiece (metal) which is going to be shaped through spark erosion.  High electrical voltage is sent through an electrode, causing a spark which removes a small amount of material at a time in the workpiece.  Dielectric fluid is sent through this distance between the graphite electrode for cleaning (flushing) the space and helping achieve temperature stability of the workpiece. Through continual sparking from the electrode and erosion of material, the desired shape is created in the workpiece.

The material used for EDM Graphite must be of a premium quality and consistency to perform the job it needs to perform.

Now that we briefly covered the process in which the graphite is used, we need to take a deeper look at what makes these materials able to perform under such intense conditions.

Consistency of the Grain Structure

What does this mean?  Look at a 200x photomicrograph (below) for a material produced by Entegris l Poco which is their EDM 3 material.  

By looking at the material you can see the conistency throughout the material is very good.  Consistency in the graphite material provides stabilization of the electrode and workpiece during the EDM process.  If the graphite materials are not consistent in structure, the results during the EDM machining process will be inconsistent as well.  The consistency of the material is also critical during the machining of the graphite electrode.  This consistency is one of the key factors which give the material and the machinist the ability to hold extremely tight tolerances with premium surface finishes.

Particle Size of Graphite used in EDM

Particle size selection of graphite is determined by the specific application and the priorities in which have been deemed most important.  As an example, if priorities are the speed to finish the process and, as an example, finish is not as important as speed, a slightly larger (10-12 micron) particle size would be a better choice than a five-micron material.  If the reverse were the case and surface finish was the priority, a five (5) micron material would be the better choice.  

Reliability of Supply

The reliability of supply for graphite is as important if not more important than many other products.  Purchasing material from a reliable source is paramount to having consistent EDM machining performance out of the graphite material.   Many suppliers in the industry private label different graphite grades and offer their specific brand and grade designation to their customers.  This is more acceptable if a) the material supplier allows private labeling and b) your supplier will not substitute materials under the same grade number.  Unfortunately substitutions under the same grade number happen all the time. 

Substitution can cause so much turmoil and confusion for the machinist as they could get different results which is especially important in the aerospace/ jet engine market, and in tight tolerance tool & die work.  At Graphel, we private label several different grade of graphite but never substitute one material for another at any time.  When prints have a call out of a specific graphite material, the call out needs to be honored and never substituted.  

There are many articles on the topic of Graphites used for EDM and the material selection process, however the one that stands out the most would be one from Entegris l Poco authored by Mr. Rick Slimp titled "EDM Graphite Buyers Guide". This was written years ago but has stood the test of time as a go-to-guide for new and experienced EDM machinists alike:

https://graphel.com/week-2-edm-graphite-buyers-guide/

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