Chemical Index of Graphite Electrodes UHP with Nipples

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Specifications 

Chemical Index of Graphite Electrodes UHP with Nipples 
1.Diameter: 200 to 700mm 
2.Length: 1600 to 2400mm 
3.Nipple:3-4TPI

 

Chemical Index of Graphite Electrodes UHP with Nipples

1. Grade: RP, HP, UHP, SHP, RPI

2. Diameter: 200 to 700mm at your choice.

3. Length: 1600 to 2400mm at your choice.

4. Nipple: 3-4 TPI

5. Fine mechanical strength and machining quality, low specific resistance, high temperature and oxidation resistance

6. Low price and timely delivery.

 

Feature

Chemical Index of Graphite Electrodes UHP with Nipples

Grades: RP, RPI, HP, SHP, UHP

 All graphite electrodes are offered with tapered nipples, i.e. 3 or 4 threads per inch, and meet the internationally accepted tolerances as per NEMA CG 1/ IEC 60239 / JIS R7201 standards. 

UHP 

Physical and chemical index

Item

Unit

Nominal   Diameter(mm)

YB/T4088-2000

Typical   Values

Industry   Standard

300-400

450-550

350-550

Resistance

Electrode

ohm

≤6.2

≤6.5

4.6-6.2

Nipple

≤5.5

≤5.5

3.5-4.5

Bending   Strength

Electrode

Mpa

≥10.5

≥10.0

≥11.0

Nipple

≥16.0

≥16.0

≥18.0

Elastic   Modulus

Electrode

Gpa

≤14.0

≤14.0

≤13.0

Nipple

≤18.0

≤18.0

≤17.0

Density

Electrode

g/cm3

≥1.65

≥1.64

1.65-1.72

Nipple

≥1.72

≥1.70

1.75-1.82

Ash   content

Electrode

%

≤0.3

≤0.3

≤0.3

Nipple

CTE(100-600)

Electrode

10-6/C

≤1.5

≤1.5

1.20-1.40

Nipple

≤1.4

≤1.4

1.10-1.30

Image

Chemical Index of Graphite Electrodes UHP with Nipples

Chemical Index of Graphite Electrodes UHP with Nipples

Chemical Index of Graphite Electrodes UHP with Nipples

 

FAQ:

Chemical Index of Graphite Electrodes UHP with Nipples

1. Why it is essential to select electrode carefully for each particular furnace?

The primary factor is the maximum current intensity of the furnace. However, other conditions should also be considered, such as the characteristics of the furnace, type of charge, tap to tap time, oxygen blowing, mechanical requirement, furnace regulation, etc.Generally, specifications for electrodes of most grades have been standardized. Variation of physical characteristics with temperature, however, should be taken into account whenever using the electrodes.

Precautions to the use of graphite electrodes

2. Why it is essential to not to fit electrodes and nipples made by different manufacturers together?

The capacities of the furnace and the transformer determine whether the grade and diameter of the electrode are suitable to the furnace or not.

In order to prevent the electrode column from being hit by the collapsed furnace loads, large and heavy scraps should be loaded onto the bottom of the furnace. Do not put significant quantity of insulating materials such as lime and so on just under the electrode column, otherwise it would be difficult to power on the electrode column, or even break it.

electrode column may be hurt when it moves up and down if the furnace cover is out of the position.

When making a connection, lost or damaged pitch plugs must be replaced.

The reason must be found out if a gap appears between two electrodes after connection. The electrode column can only be loaded after the gap being eliminated.

The electrode column must be strictly perpendicular to the ground lever. Oblique column is not allowed during operation.

The holder must be placed between the two safety marks on the top electrode, otherwise the column may be broken.

Generally, different manufacturers may make their electrodes with different raw materials and processes, therefore the physical and chemical properties of their electrodes are usually different. Please do not fit electrodes and nipples made by different manufacturers together.

 

Applications

Chemical Index of Graphite Electrodes UHP with Nipples 

Electrodes in electric arc furnace and ladle refining furnace for steel making;

Electrodes in electric smelting furnace for producing industrial silicon, yellow phosphorus, corundum and so on.

 


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Q:Graphitized coke, graphite, broken, mixed up, how to export?
Graphite electrode pieces in different data definition of graphite scrap is different, some data and literature of the graphite particles are called not great pieces of graphite (such as graphite) and some say that graphite products have a certain size, into a block of graphite broken, we are here to say Shi Mosui is second, often called as the graphite block. The production of graphite from graphite products, graphitization and machining process. Graphite waste used as an additive and as a conductive material in the steelmaking and casting industries.
Q:What do carbon products include?
High power electrode and ultra high power electrode. The carbon block can be divided into blast furnace carbon block, aluminum carbon block and electric furnace block. Carbon products can be divided into carbon products, graphite products, carbon fibers and graphite fibers according to the depth of processing. Carbon products can be divided into graphite products, carbon products, carbon fibers and special graphite products according to the raw materials and the production process. Carbon products according to their ash content, and can be divided into multi gray products and less ash products (including ash below l%).
Q:Graphite electrode press device
(1) ordinary power graphite electrode, using graphite electrode with current density lower than 17A / cm 2, is mainly used in steel-making, smelting silicon, refining yellow phosphorus and other common power electric stove(2) anti oxidation coating graphite electrode. The surface is coated with an anti oxidation protective layer of graphite electrode to form a protective layer which has both conductive and high-temperature oxidation resistance, thus reducing the electrode consumption during steelmaking
Q:Why is the production of one ton of ultra high power graphite electrode requires 1.05 tons of coke?
After calcined to eliminate ash and volatile part of the points in this process will be a lot of weight loss, in the process of crushing mixing in process of baking or graphite in high temperature heat treatment, another part of the impurities were excluded, so the raw material is higher than the rate of finished products.
Q:National standard for graphite electrodes
Page 7 the international standard specifies the shape, dimensions and tolerances, technical requirements, test methods, packaging, marking, storage, transportation and quality certificates of graphite electrodes. This standard applies to high quality petroleum coke, asphalt, coke as the main raw material, through molding, roasting, impregnation, graphitization and mechanical processing made of, power supply arc furnace as conductive material of ordinary power graphite electrode. Common power graphite electrode GB
Q:The production of one ton of steel required graphite electrode
The consumption of graphite electrode in steelmaking in arc furnace, according to the different material, different specifications of graphite electrode used (normal power graphite electrode, high power graphite electrode, ultra high power graphite electrode) have relations.
Q:What are the factors affecting the service life of graphite electrode in ultra high power arc furnace?
China's graphite electrode quality standard (YB/T4090-2000) to evaluate the quality of the ultra high power graphite electrode is defined 6 physicochemical indexes, including resistivity, flexural strength, elastic modulus, bulk density and linear expansion coefficient as the quality evaluation index, ash as a reference index.
Q:Classification of graphite electrodes
A graphite electrode coated with an antioxidant protective layer (graphite electrode, antioxidant). The utility model has the advantages of forming a protective layer capable of conducting electricity and resisting oxidation at high temperature, reducing electrode consumption (19%~50%) during the steelmaking process of the poly carbon graphite electrode, prolonging the service life of the electrode (22%~60%), and reducing the electric energy consumption of the electrode. The popularization and use of this technology can bring about such economic and social effects:The unit consumption of graphite electrode is less, and the production cost is reduced.The power consumption of the graphite electrode is less, the energy consumption per unit of steelmaking is saved, the production cost is saved, and the energy saving is saved.Because the number of graphite electrodes is changed less, the labor quantity and danger coefficient of operators are reduced, and the production efficiency is improved.Graphite electrode is a kind of low consumption and low pollution product. It has a very important social significance in today's energy saving, emission reduction and environmental protection.
Q:Will the brush grease not short-circuit the commutator?
Specifically: between motor brush and collector plus grease is redundant, but it is very harmful, fat instead will not play the role of good lubrication, it will destroy the good lubrication brush itself, not superfluous".
Q:The reason why graphite is used as electrode
Graphite is good in plasticity and easier to be machined preciselyGraphite material has the advantages of high processing accuracy and good surface effect, especially in the processing of precise, complex, thin-walled and Gao Ying material mold cavity. Because the cutting resistance of graphite is only 1/5 of copper material, it is easier to do manual grinding and polishing on the operation. There is no burr after graphite processing, and it is easier to realize automatic production. Complex geometric modeling can be realized.

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