What are the safety work requirements for melting work positions?

Safe working techniques for melting workers

1 Scope of application

This regulation applies to melting operators of medium frequency furnaces and melting operators of power frequency furnaces.

2 Safety operating procedures

2.1 Wear protective equipment before work, and check each system of the equipment to see if the water pressure, furnace body, hydraulic system and power distribution system meet the conditions for opening the furnace. , whether each transfer switch and adjustment knob are in the specified position, and whether the equipment is grounded reliably.

2.2 When operating the equipment, you should stand on the insulating rubber and wear insulating gloves when necessary. It is strictly prohibited to operate the power supply with wet hands.

2.3 After the equipment starts operating, there should be someone on duty in front of the furnace, who should frequently inspect the operation of each system of the equipment, deal with any problems found in a timely manner, and ensure safe operation.

2.4 Melting equipment should be placed neatly. It is strictly forbidden to store flammable and explosive items around the furnace. Raw materials should be stacked in an orderly manner, with smooth passages and no obstructions.

2.5 Before melting work, check whether the melting equipment is intact. Tools that have not been preheated are not allowed to be put into the molten metal to avoid explosion of the molten metal.

2.6 The principle of adding small amounts and more times should be followed when adding furnace materials. It is strictly forbidden to add too many raw materials at one time while the equipment is running.

2.7 During the melting process, materials must be added and poked in time to prevent splashing caused by material collapse.

2.8 When melting and adding materials, check whether there are any explosive items in advance. Materials must be preheated when added. It is strictly forbidden to add materials without preheating.

2.9 During the smelting process, check the furnace body and power meter frequently. If any signs of furnace leakage are found, the smelting should be stopped immediately to avoid burning out the induction coil and causing an explosion accident.

2.10 When a power outage occurs, the smooth flow of cooling water must be ensured and the heat preservation in the furnace must be paid attention to. If the power supply cannot be restored in a short period of time, the molten metal in the furnace should be poured out in time; when a frozen and sealed "shed furnace" phenomenon is found, the furnace body should be tilted to a certain angle in time to melt the frozen part. It is prohibited to use an iron rod to open it.

2.11 Water is not allowed to accumulate in the work site and the pit in front of the furnace, and debris is not allowed to be piled up. The site should be kept clean and the roads smooth.

2.12 After the work is completed, the load power should be adjusted to the minimum first, then the load power supply should be disconnected, and then the main power supply should be disconnected. Switching with load is strictly prohibited. After the furnace is shut down, the cooling water of the equipment should continue to flow smoothly, the work site should be cleaned, and shift handover records should be kept.

2.13 When repairing the furnace lining and building the furnace, the power should be cut off. It is strictly forbidden to mix iron scraps and iron oxide into furnace repair and building materials. When using pneumatic tools. It should be operated according to the usage requirements of pneumatic tools.

2.14 It is strictly prohibited to pour the metal solution while it is charged and to add a large amount of cold charge at one time while it is charged.

2.15 When there is an electrical failure in the equipment and it needs to be repaired, it should be repaired by a professional electrician. Non-electrical workers are prohibited from repairing or replacing electrical circuits and components.

2.16 The pouring ladle must be strictly baked before containing molten metal, and the slag removal tools must be preheated and dried. The pouring ladle should be placed flat and stable, and the molten metal should not be overfilled.

2.17 When pouring large castings, there must be dedicated personnel to remove slag, block slag, and introduce air to avoid explosion accidents. Slag-stopping personnel must remove metal lumps and other particles generated by spilled molten metal at any time.

2.18 Transporting molten metal by truck must be directed by a dedicated person. The spreaders and lifting bags used must be carefully inspected before lifting. It is strictly prohibited to use spreaders and lifting bags that do not meet the requirements. Before lifting the molten metal, the safety device of the anti-tilting mechanism of the lifting bag must be inserted, and it is not allowed to pass over people's heads.

2.19 It is strictly forbidden to look at the riser to observe the molten metal during pouring, and no one is allowed to stand opposite the pouring ladle. If the molten metal is found to overflow, sand and mud should be used to block it.

2.20 When pouring high sand box castings, it should be directed by a dedicated person, and the operator should stand on a stable ground. Large castings exceeding 1 meter should be cast in a pit to avoid burns when the box leaks.

2.21 When lifting the ladle containing molten metal, the steps should be consistent and the direction should be uniform. Turns should be slow, and the ladle should be lifted flat and steady. If someone gets burned, the bag must not be thrown away, but another person should be notified to put the bag down slowly.

2.22 When pouring on the pouring platform, stand firm and look at the gate. The operator stands on the side of the pouring ladle and the molten metal must be poured when the mold conveyor is stationary.