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Safety Operating Procedures for Electric Furnaces in the Steelmaking Workshop
Aug 25,2020
Steelmaking workshop Electric furnace Safety Operating Procedures
1. Operators must strictly adhere to the General Safety Regulations and the Electric Furnace Process Operation Procedures.
2. Operators must wear work uniforms and safety helmets.
3. The electric furnace’s limit switches and interlocking functions are complete and effective.
4. Water pipes, various gas pipelines, hydraulic and lubrication lines, electrical cables, and all types of equipment are properly protected.
5. Are the equipment’s safety protection devices fully intact, and are the covers and guards undamaged?
6. Ensure that electrical equipment is free from damaged insulation and electrical leakage. Install residual-current devices (RCDs) on electric drills, flatcar cables, and powder-painting cans. Make sure that floor-cleaning cables have no damaged insulation and do not leak electricity.
7. When loading the electric furnace, a dedicated person must direct the overhead crane. Personnel around the electric furnace must withdraw to a safe location, and it is strictly prohibited to stand beneath suspended loads.
8. When adding scrap steel two or more times, the scrap steel in the furnace must not all be completely melted to prevent molten steel from splashing.
9. During material charging, the operator directing the feeding personnel must carefully observe the shape of the scrap steel inside the furnace and give clear command signals to prevent the material hopper from becoming detached.
10. When pouring molten iron, the signals given by the crane operator must be clear and unambiguous. The molten iron ladle should be lowered as much as possible, and the pouring process should start slowly and then accelerate gradually to prevent large splashes of molten iron.
11. Before energizing the furnace, check whether there are any people around the furnace body. Issue the energizing signal and only proceed with energization after confirming that everything is correct.
12. During the smelting process, it is strictly prohibited to pass under the high-pressure water-cooled cable of the electric furnace.
13. Within 10 minutes after the electric furnace is energized, no operations are allowed near the furnace opening to prevent injuries caused by explosives in scrap steel.
14. Before blowing oxygen, first check and confirm that the oxygen valve, hose, and fittings are leak-free. If a leak is detected,...
It should be inspected and replaced in a timely manner.
15. When blowing oxygen, first open the oxygen supply and then insert the oxygen lance into the molten steel. Do not use the equipment if the oxygen pressure is less than 0.3 MPa.
16. Do not hold the oxygen tube by its connector end to prevent oxygen leakage and backfire, which could cause injury.
17. When blowing oxygen, the nozzle must not come into contact with the charge material to prevent backfire and arc formation that could damage the oxygen lance. If large chunks of scrap steel block the furnace door, do not use the oxygen lance to blow oxygen.
18. When blowing oxygen, avoid standing directly in front of the furnace door and try to stand on the right side of the door to prevent injury from boiling splashes inside the furnace.
19. When blowing oxygen, the oxygen-blowing operator must remain highly focused and pay close attention to the conditions inside the furnace. In case of an emergency, the oxygen valve should be promptly shut off.
20. If the oxygen lance has a water leak, it should be immediately taken out of service to prevent contact between water and steel slag, which could cause an explosion.
21. During the smelting process, closely monitor the changes in the furnace flame. If any abnormalities are detected, immediately stop the smelting operation and resume production only after the potential hazards have been eliminated.
22. When taking temperature readings or collecting samples, there is a risk of falling and of boiling, spattering, or even explosions inside the furnace. Before starting any operation, carefully observe changes within the furnace and the surrounding environment, and confirm the emergency evacuation route. When taking temperature readings or collecting samples, keep your body offset from directly in front of the furnace door and ensure that your feet are firmly placed on a stable footing.
23. When tapping steel from the electric furnace, first confirm that there is no one beneath the furnace and that the ladle car is properly positioned. If the situation is unclear, absolutely do not proceed with tapping the steel.
24. During the steel tapping process, when adding various materials into the ladle, make sure to stand firmly. When throwing in the materials, pay close attention to any changes in the molten steel to prevent a major boil-up inside the furnace.
25. When using filler material to plug the steel tapping opening, due to the unevenness of the eccentric cover, high temperatures, significant smoke and dust, and poor visibility, strict confirmation is essential to prevent falls, drops, and burns.
26. When lifting heavy objects, inspect the slings and wire rope loops to ensure they are secure before use.
27. When removing the old furnace cover, make sure to check whether there is any risk of steel slag falling from the cover. It is strictly forbidden to stand directly above the furnace cover to prevent injury from falling slag.
28. When replacing the furnace electrodes, first check whether the lifting chain is secure and whether the electrode wire ends are damaged. Do not use electrodes that cannot ensure safety.
29. When entering the furnace, first confirm that the electric furnace is de-energized and that the furnace guardrails are intact and securely fastened. Be especially careful when walking on the furnace. When hanging the electrode, make sure to stand firmly, and ensure that the command signals are clear and precise.
30. When assembling or disassembling electrodes, pay attention to their swinging motion to prevent the electrodes from colliding, breaking, injuring people, or damaging equipment.
31. During electric furnace smelting, if a water leak is detected, immediately notify on-site personnel to evacuate to a safe location, inform the control room operator to perform an emergency power cut and raise the electrode, and strictly prohibit any movement of the furnace body.
32. Accumulation of water is strictly prohibited in the accident pit of the steel-drawing car and in the slag-discharging area. If water is found, it must be removed and the area dried completely before production can resume.
33. Strictly inspect and confirm that the forklift’s brakes are flexible and reliable. When opening the furnace door, carefully control the vehicle’s speed and direction to prevent falls and damage to the furnace body.
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Kangda Electric Furnace specializes in the manufacture of the following equipment: KGCL series medium-frequency power supplies, KGPS series medium-frequency power supplies, GTR series medium-frequency induction heating furnaces...
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Address: Yuhe Industrial Park, Weicheng District, Weifang City, Shandong Province
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