rp hp uhp graphite electrodes

Pubdate: 08-13 2021

Summary of common questions about rp hp uhp graphite electrodes in electric furnace steelmaking

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1 Summary of common questions about rp hp uhp graphite electrodes in electric furnace steelmaking

rp hp uhp graphite electrodes

Ulanchabu rp hp uhp graphite electrodes electric arc furnace steelmaking is in the ascendant in steel production enterprises. At present, the proportion of electric furnace steel in the three methods of open hearth, converter and electric arc furnace steelmaking has reached about 30%. Electric arc furnace steelmaking uses rp hp uhp graphite electrodes as conductive materials. The consumption of rp hp uhp graphite electrodes in electric arc furnace steelmaking depends on the quality of rp hp uhp graphite electrodes, as well as the level of steelmaking operations and management.

Now, we analyze the usage problems accumulated by our factory’s rp hp uhp graphite electrodes over the years, in order to benefit the operation of rp hp uhp graphite electrodes in electric arc furnace steelmaking.

1. What are the main factors affecting the consumption of rp hp uhp graphite electrodes in electric arc furnace steelmaking? There are:

(1) Filling amount and feeding method.

(2) Feeding time and power-off time.

(3) Smelting cycle.

(4) Exhaust gas emission and dust removal system.

(5) rp hp uhp graphite electrodes adjust the quality.

(6) Load regulation quality.

(7) Oxygen blowing operation.

(8) Connection quality of rp hp uhp graphite electrodes.

(9) rp hp uhp graphite electrodes connector body quality.

(10) rp hp uhp graphite electrodes connector hole and connector processing accuracy.

2. What should rp hp uhp graphite electrodes pay attention to in the storage of steel mills?

rp hp uhp graphite electrodes and connectors should be stored on a clean concrete floor to prevent rp hp uhp graphite electrodes from being damaged or sticking to dirt; for temporarily not used rp hp uhp graphite electrodes, do not remove the packaging to prevent dust and debris from falling To the thread of the connector or the end face of the rp hp uhp graphite electrodes and the inner thread of the hole of the rp hp uhp graphite electrodes. The rp hp uhp graphite electrodes should be neatly stored in the warehouse, and the two ends of the rp hp uhp graphite electrodes should be padded to prevent slipping. The stack height of the rp hp uhp graphite electrodes should generally not exceed two meters. The stored rp hp uhp graphite electrodes should be protected from rain and moisture to prevent cracks and accelerated oxidation of the rp hp uhp graphite electrodes during steelmaking. Store the rp hp uhp graphite electrodes joints away from high temperatures to prevent the joint plugs from melting and overflowing.

rp hp uhp graphite electrodes

3. How to avoid breaking and tripping of rp hp uhp graphite electrodes during steelmaking?

The following measures are taken during the steelmaking process to effectively avoid breaking and tripping of the rp hp uhp graphite electrodes:

(1) The phase sequence of rp hp uhp graphite electrodes is correct, counterclockwise.

(2) The scrap steel is evenly distributed in the steel furnace, and large pieces of scrap steel should be placed at the bottom of the furnace as much as possible.

(3) Avoid non-conductive materials in scrap steel.

(4) The rp hp uhp graphite electrodes are aligned with the furnace top hole, and the rp hp uhp graphite electrodes are parallel. The furnace top hole wall should be cleaned frequently to avoid the accumulation of residual steel slag and force the rp hp uhp graphite electrodes.

(5) Keep the electric furnace tilting system in good condition and keep the electric furnace tilting stable.

(6) Avoid clamping the rp hp uhp graphite electrodes holder at the junction of the rp hp uhp graphite electrodes and the connector hole of the rp hp uhp graphite electrodes.

(7) Choose joints with high strength and high processing accuracy.

(8) The torque applied when connecting rp hp uhp graphite electrodes should be appropriate.

(9) Before and during the connection of rp hp uhp graphite electrodes, prevent rp hp uhp graphite electrodes and connector threads from mechanical damage.

(10) rp hp uhp graphite electrodes holes and joints to prevent steel slag or foreign objects from embedding and affecting the screw connection.

4. When steel mills use rp hp uhp graphite electrodes, what should be paid attention to during crane lifting?

Regardless of whether the rp hp uhp graphite electrodes are transported by a forklift or a crane, they must be carefully operated. During the lifting process of the rp hp uhp graphite electrodes, damage to the ends and threads of the rp hp uhp graphite electrodes will cause serious damage to the use of the rp hp uhp graphite electrodes. The problem is especially important to protect the thread of the threaded hole and the joint. When lifting the rp hp uhp graphite electrodes, there must be a pad to prevent damage to the end face and connector threads of the rp hp uhp graphite electrodes.

5. How to connect rp hp uhp graphite electrodes correctly?

When connecting, use compressed air to blow out the rp hp uhp graphite electrode hole, the end face of the rp hp uhp graphite electrode and the connector. There should be no dust and foreign objects embedded. The connection should be kept clean and flat. When the two rp hp uhp graphite electrodes are screwed After entering to a certain extent (the gap is about 10mm), blow again with compressed air, and then tighten the rp hp uhp graphite electrodes with torque pliers. The torque applied during tightening should be appropriate. If there is a gap in the connection after tightening, it must be Exit and reconnect until there is no gap.

rp hp uhp graphite electrodes

6. About the correct clamping position of the rp hp uhp graphite electrodes holder

The holder of the rp hp uhp graphite electrodes cannot be clamped between the connection of the rp hp uhp graphite electrodes and the threaded hole of the rp hp uhp graphite electrodes. It should be clamped between the two white wires of the rp hp uhp graphite electrodes. At the same time, in the holder Before clamping the rp hp uhp graphite electrodes, use compressed air to blow off the surface of the rp hp uhp graphite electrodes and the holder to ensure that the current and heat flow are well conducted between the rp hp uhp graphite electrodes and the holder to prevent damage. The arc causes damage to the holder, thereby extending the life of the holder.

7. What are the measures to reduce the oxidation consumption of rp hp uhp graphite electrodes during steelmaking in an electric arc furnace?

The main reduction measures are:

(1) Reduce oxidation consumption at the periphery of the rp hp uhp graphite electrodes, strengthen the sealing of the furnace, and reduce air intrusion into the furnace; minimize the exposure time of the red heat rp hp uhp graphite electrodes outside the furnace, and standardize the oxygen blowing operation.

(2) For smelting furnaces, if conditions permit, rp hp uhp graphite electrodes adopt spray cooling technology, which can effectively reduce the side oxidation consumption of rp hp uhp graphite electrodes.

(3) Steel mills spray anti-oxidant substances on the surface of rp hp uhp graphite electrodes, or rp hp uhp graphite electrodes manufacturers use antioxidant dipping treatment technology before rp hp uhp graphite electrodes leave the factory to improve the oxidation resistance of the body of rp hp uhp graphite electrodes performance.

rp hp uhp graphite electrodes

8. How does the phase sequence of rp hp uhp graphite electrodes affect the use of rp hp uhp graphite electrodes?

The phase sequence of rp hp uhp graphite electrodes during electric arc furnace steelmaking is opposed to rp hp uhp graphite electrodes. The tripping and breaking of rp hp uhp graphite electrodes during use have a significant impact. If the phase sequence of rp hp uhp graphite electrodes is clockwise, rp hp uhp graphite electrodes The electrodes will loosen after being energized for a period of time during use, which will easily cause the rp hp uhp graphite electrodes to loosen or the joints to break. The correct phase sequence of the rp hp uhp graphite electrodes should be counterclockwise. In this way, the rp hp uhp graphite electrodes will be connected during use. Getting closer.

9. Why is the phase rp hp uhp graphite electrodes required to be parallel and aligned with the top hole of the furnace cover during electric arc furnace steelmaking?

rp hp uhp graphite electrodes column and furnace cover top hole should be avoided, rp hp uhp graphite electrodes column should avoid friction with the furnace cover, otherwise friction with the furnace cover during lifting and lowering will cause the furnace cover to squeeze rp hp uhp graphite electrodes, for AC furnace, three-phase rp hp uhp graphite electrodes column should be kept parallel as much as possible.

rp hp uhp graphite electrodes

10. How to apply torque when screwing rp hp uhp graphite electrodes?

rp hp uhp graphite electrodes must be screwed with proper torque, and the operation must be inertial. Too small a torque will cause thermal loosening of the connector, and too much torque will cause cracks in the rp hp uhp graphite electrodes connector hole. rp hp uhp graphite electrodes screwing tool, please do not overtighten or loosen it. If there is a gap in the end face contact after tightening, it must be removed and cleaned before re-spinning.

11. What are the characteristics of rp hp uhp graphite electrodes produced by tandem graphitization furnace?

The development direction of graphitization furnace is internal heat tandem graphitization furnace. Since the current density of the series connection column is the same, the resistivity difference of the rp hp uhp graphite electrodes is very small; secondly, the resistivity at both ends of the inner string graphitized product is slightly lower than that of the middle part (Acheson furnace graphitized products have high resistivity at both ends In the middle), it is beneficial to reduce the resistance of the connection when users use it, and alleviate the overheating and redness of the joint connection. Therefore, the quality uniformity of the rp hp uhp graphite electrodes produced by the tandem graphitization furnace is better than that of the Acheson furnace. It is suitable for the production requirements of electric arc furnace steelmaking.

12. Why does the quality of the rp hp uhp graphite electrodes joint play an important role in the electric arc furnace steelmaking?

The connector plays a key role in the connection of rp hp uhp graphite electrodes during steelmaking. The quality of the connector is directly related to the use of rp hp uhp graphite electrodes in electric furnace steelmaking, no matter how good the quality of rp hp uhp graphite electrodes is, if not A reasonable combination of high-quality joints can also cause problems in steelmaking. According to relevant data, in electric furnace steelmaking, more than 80% of rp hp uhp graphite electrodes use accidents are caused by broken joints and loose trips. Therefore, the choice of high-quality rp hp uhp graphite electrodes is the electric arc furnace steelmaking rp Guarantee conditions for normal use of hp uhp graphite electrodes.

13. Which quality indicators of rp hp uhp graphite electrodes (joint) products have an impact on electric furnace steelmaking?

(1) Quality indicators such as volume density, resistivity, strength, elastic modulus and thermal expansion coefficient of rp hp uhp graphite electrodes.

(2) Quality indicators such as bulk density, resistivity, strength, elastic modulus and thermal expansion coefficient of the joint.

(3) The processing accuracy of rp hp uhp graphite electrodes and connectors, no matter how good the quality of rp hp uhp graphite electrodes and connectors, there is no good processing accuracy (mainly refers to the cooperation of rp hp uhp graphite electrodes and connectors), and the use effect is not good.

(4) The quality of the internal structure of the rp hp uhp graphite electrodes and connectors requires that there are no cracks that cause hidden dangers in use.

rp hp uhp graphite electrodes

14. What are the consequences of severe oxidation of the rp hp uhp graphite electrodes on the upper end of the rp hp uhp graphite electrodes holder?

During steelmaking in the smelting furnace, the scrap is burned in the furnace. At the same time, due to the oxygen blowing in the furnace, the height of the flame column is often higher than the end face of the rp hp uhp graphite electrodes at the upper end of the holder, which is easy to oxidize the end face of the rp hp uhp graphite electrodes. Severe oxidation will cause the end face of the rp hp uhp graphite electrodes to deform from a flat surface to a bevel. When the new rp hp uhp graphite electrodes are connected to the upper end, the end face of the rp hp uhp graphite electrodes on the lower part is oxidized and deformed and cannot make good contact with the new rp hp uhp graphite electrodes. , Rp hp uhp graphite electrodes have large gaps, which can easily cause oxidation and breakage of the internal joints. Without changing the steelmaking conditions, the best preventive measure is to add a protective cover to the end face of the rp hp uhp graphite electrodes at the upper end of the holder to block flame and air, so as to protect the end face of the rp hp uhp graphite electrodes. .


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