Port：Tianjin Port
Packing：Wooden Case
Delivery time：5-7days
Minimum order quantity：5tons
Supply Ability：5000 tons/month
RP graphite electrode (RP): It is allowed to use graphite electrode with current density lower than 17A/cm2, which is mainly used for ordinary power electric furnaces such as steel making, silicon refining, and yellowing phosphorus.
Artificial graphite electrode is made of high-quality low ash materials, such as petroleum coke, needle coke and coal pitch.after calcining,burdening,kneading,forming,baking and pressure impregnation, graphitization and then precision machined with professional CNC machining.such of the products own characteristics with low resistivity, good electrical conductivity ,low ash, compact structure,good anti oxidation and high mechanical strength, so it is the best conductive material for electric arc furnace、ladle furnace and submerged arc furnace.
The Tolerance
Normal tolerance (default): tolerance of ±10mm diameter and length ±100mm.
Fixed tolerance: tolerances of 3-5 mm in diameter and 10-30 mm in length.
Properties | Unit | Nominal Diameter Of Electrode | ||||
UHP | HP | RP | ||||
300-600 mm | 650-800mm | 300-800mm | 300-800mm | |||
Electric resistivity | Electrode | μΩ.m | 4.8-5.8 | 4.6-5.8 | 5.8-6.6 | 7.8-8.8 |
Nipple | 3.8-4.5 | 3.8-4.5 | 4.2-5.0 | 5.0-6.5 | ||
Flexural strength | Electrode | Mpa | 10.0-14.0 | 10.0-14.0 | 10.0-13.0 | 7.0-12.0 |
Nipple | 20.0-26.0 | 22.0-26.0 | 18.0-22.0 | 15.0-20.0 | ||
Young’s modulus | Electrode | Gpa | 9.0-13.0 | 10.0-14.0 | 8.0-12.0 | 7.0-9.3 |
Nipple | 15.0-18.0 | 15.0-18.0 | 14.0-16.0 | 12.0-14.0 | ||
Bulk density | Electrode | ≥g/cm3 | 1.68-1.74 | 1.70-1.74 | 1.62-1.66 | 1.53-1.56 |
Nipple | 1.77-1.82 | 1.78-1.84 | 1.74-1.80 | 1.70-1.74 | ||
CTE(100-600℃） | Electrode | ×10-6/℃ | 1.1-1.4 | 1.1-1.4 | 1.6-1.9 | 2.2-2.6 |
Nipple | 0.9-1.2 | 0.9-1.2 | 1.1-1.4 | 2.0-2.5 | ||
Ash | 0.3 | 0.3 | 0.3 | 0.5 | ||
Connection of graphite electrodes
Wet graphite electrodes must be dried prior to use.
The foam protective caps on the electrodes socket shall be removed to verify the integrity of the internal threads of the electrode socket.
The surfaces of the electrodes and the internal threads of the socket shall be cleared by compressed air free of any oil and water.no steel wool or metal sand cloth shall be used in such clearance.
The nipple must be screwed carefully into the electrode socket of one end of the electrode without collision with the internal threads (it is not suggested to directly put the nipple into the electrode removed from the furnace).
The lifting appliance (it’s preferred to adopt graphite lifting appliance) should be screwed into the electrode socket of the other end of the electrode.
When lifting the electrode,cushion-like materials must be put on the ground under the connecting end of the electrode to avoid and collision,after the lifting hook has been put into the ring of the lifting appliance,the electrode shall be lifted smoothly to prevent it from falling or colliding with any other fixture.
The electrode shall be lifted above the head of the working electrode and dropped slowly aiming at the electrode socket,then the electrode will be screwed to make the helical hook and the electrode declining and turning together,when the distance between the end faces of two electrodes is 10-20mm,the two end face of the electrodes and the outer part of the nipple must be cleared again by compressed air.finally,the electrode must be laid gently,or the threads of the electrode socket and nipple will be damaged because of the violent collision.
Use torque spanner to screw the electrode until the end faces of the two electrodes contact closely(the gap of correct connection between the electrodes is less than 0.05mm)
Transportation of graphite electrodes
Cover a rain-proof tarpaulin on the graphite electrodes in the course of long-distance transportation.
It is important to use a wire rope when lifting the wooden-packaged electrodes with a lifting crance.it is forbidden to lift the electrodes with the steel packaging belts on the wooden-packaged.
For the purpose of protecting the electrodes end and threads,it is not allowed to lift an eletrode with a grappling iron hooking the electrode socket.
Put slightly when loading and unloading the nipple box so as to prevent damage to the threads.
Packing
Graphite electrode is packaged by wooden cages and nipple is packaged by wooden boxes.graphite electrode and nipple can be packaged together according to the requirements of the customers.the products are protected by waterproof and dustproof plastic inside and fixed by steel bands,fit for land transportation and sea transportation .
Address:#40 BUILDING,NO.702 SHANHE ROAD, CHENGYANG DISTRICT,QINGDAO, SHANDONG,CHINA
