At present, the main products are graphite electrode, carbon electrode, electrode paste, graphite powder, graphite block, forged petroleum coke, carbon additive and pre-baked anode
Graphite electrode usage details
Specification for use of graphite electrodes
With more than 20 years of manufacturing, sales experience and expertise, Carbo Graphite Industrial PTE. LTD., (from China) is mainly engaged in carbon metallurgy products, committed to providing customers with a series of high-quality, innovative, cost-effective products, solutions and services.
At present, the main products are graphite electrode, carbon electrode, electrode paste, graphite powder, graphite block, forged petroleum coke, carbon additive and pre-baked anode.
One. used for electric arc furnace
Graphite electrodes are mainly used for making steel in electric furnace.
Electric furnace steelmaking is the use of graphite electrode into the furnace into the current, the strong current in the lower end of the electrode through gas arc discharge, using the heat generated by the arc to smelting.
According to the capacity of the furnace, graphite electrodes of different diameters are used. In order to make the electrodes continuously used, the electrodes are connected by the electrode threaded joint.
The graphite electrode used in steelmaking accounts for about 70 ~ 80% of the total graphite electrode consumption.
Two, for the thermal electric furnace
Its characteristic is that the lower part of the conductive electrode is buried in the charge, so in addition to the electric arc between the plate and the charge to generate heat, when the current through the charge by the charge resistance also generates heat.
Three, for resistance furnace
The graphitization furnace for producing graphite products, the melting furnace for melting glass and the electric furnace for producing silicon carbide are all resistance furnaces.
In general, the conductive graphite electrode is inserted into the furnace wall at the end of the hearth, so the conductive electrode is not continuously consumed.
1. The graphite electrode subject to moisture should be dried before use.
2. Remove the foam protective cap on the spare graphite electrode hole and check whether the inner thread of the electrode hole is complete.
3. Clean the surface of the standby graphite electrode and the thread in the hole with the compressed air without oil and water;
Avoid using wire or metal brush emery cloth to clean.
4. Screw the connector carefully into the electrode hole of the standby graphite electrode (it is not recommended to install the connector directly into the replaced electrode on the furnace), and do not collide with the thread.
5. Screw the electrode spreader (graphite spreader is recommended) into the electrode hole at the other end of the standby electrode.
6. When lifting the electrode, pad the soft material to the bottom of one end of the standby electrode connector to prevent the ground from touching the connector;
Lift with the hook into the sling ring of the spreader. The lifting electrode should be stable to prevent the electrode from loosening from the B end or colliding with other fixed devices.
7. Lift the standby electrode to the top of the electrode to be connected and drop it slowly after aligning with the electrode hole;
Rotate the standby electrode so that the spiral hook and the electrode rotate down together;
When the two electrode ends are 10-20mm apart, clean the exposed part of the two electrode ends and the joint with compressed air again.
When the electrode is finally lowered completely, do not be too violent, or the screw thread of the electrode hole and joint will be damaged due to violent collision.
8. Screw the standby electrode with a torque wrench until the end faces of the two electrodes are in close contact (the correct connection gap between the electrode and the joint is less than 0.05mm).
Ordinary power graphite electrode:
1. 100-350 - mm in diameter, than the resistance of 6-9 mu Ω m, 10-12 Mpa flexural strength, elastic modulus of 7-9 gpa, thermal expansion coefficient 1.8 2.9 X 10-6 / ℃, 18 to 22 Mpa compressive strength, volume density of 1.52 1.57 G/CM3, ash content of 0.3%.
2. 400-500 - mm in diameter, than the resistance of 7 to 10 mu Ω m, 6.5 to 10 Mpa flexural strength, elastic modulus of 7-9.3 Gpa, thermal expansion coefficient 1.7 2.9 X 10-6 / ℃, 18 to 22 Mpa compressive strength, volume density of 1.52 1.57 G/CM3, ash content of 0.3%.
High power graphite electrode:
1. 200-350 - mm in diameter, than the resistance of 6-7 mu Ω m, 10-15 Mpa flexural strength, elastic modulus of 9-12 gpa, thermal expansion coefficient 1.6 2.2 X 10-6 / ℃, 24 to 28 Mpa compressive strength, volume density of 1.62 1.70 G/CM3, ash content of 0.3%.
2. 400-500 - mm in diameter, than the resistance of 6-7 mu Ω m, 10 to 13 Mpa flexural strength, elastic modulus of 9-12 gpa, thermal expansion coefficient 1.5 2.2 X 10-6 / ℃, 24-26 Mpa compressive strength, volume density of 1.62 1.68 G/CM3, ash content of 0.3%.
Electrode connector: 200-500 - mm diameter, resistance than 4 to 7 mu Ω m, 12 to 20 Mpa flexural strength, elastic modulus of 12-14 gpa, thermal expansion coefficient 2.0 3.0 X 10-6 / ℃, 32-38 Mpa compressive strength, volume density of 1.70 1.80 G/CM3, ash content of 0.3%.
The graphite electrode is coated with an antioxidant protective layer (graphite electrode antioxidant).
Forming a protective layer that can conduct electricity and resist high temperature oxidation, reducing the electrode consumption (19%~50%) during steelmaking, extending the service life of the electrode (22%~60%), and reducing the electric energy consumption of the electrode
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