Main safety technologies for hot rolling

2022-07-25
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Main safety technologies for steel rolling

1) safety technologies for raw material preparation

shall be equipped with sufficient raw material warehouses, intermediate warehouses, finished product warehouses and open stacking places to safely stack metal materials. Billet is usually unloaded by disk crane and single hook crane. When using the disk crane, the hanging personnel shall check whether the disk is firm to prevent falling off and hitting people. Before unloading with a single hook, check the placement of steel billets on the vehicle. Whether the steel rope and the safety column on the vehicle are complete and firm, and whether they are used normally. During unloading, the steel rope shall be threaded at the middle position, and the span between the two steel ropes shall be kept more than 1m, so that the two ends of the billet can be balanced after lifting, and then stacked on the stack. Hot billets above 400 ℃ shall not be lifted with steel wire rope to avoid burning the steel wire rope and causing billet falling, smashing and scalding. The steel billets shall be stacked stably and neatly, and a certain distance shall be kept between the stacks to facilitate the walking of the staff and avoid collision when lifting and placing the steel billets. The height of the stack shall not affect the normal operation of the crane. The height of the stack near the billet lifting and unloading operation line shall not affect the sight of the driver. The staff shall not rest or stay between the billet stacks. For example, the hanging personnel of seamless steel pipes, stainless steel plates and stainless steel belts shall carefully observe whether the steel billets on the stack are in a balanced state when they go up and down the stack, so as to prevent the crane from rolling or stepping over when climbing due to vibration during lifting and falling, resulting in crushing or crushing accidents

the billet of large steel is cleaned of surface defects with flame, which has the advantage of fast cleaning speed. Flame cleaning is mainly carried out by burning gas and oxygen. Before work, carefully check whether the flame gun, gas and oxygen hoses, valves, joints, etc. have air leakage, whether the air valve and gas valve are flexible and easy to use, and immediately eliminate temporary faults during work. If the flame gun backfires, pull down the gas hose immediately and close the air valve quickly to prevent backfire explosion from hurting people. The flame gun operation procedure shall be carried out according to the operating procedures

it is very important to stack and manage the raw materials of medium and heavy plates. When stacking, the stack should be flat and firm, and the stack height should not exceed 4.5m. Pay attention to the standardized operation and safe use of flame grab and cutter

preparation of cold-rolled raw materials: the cold-rolled raw material steel coil is more than 2T, and lifting is the key issue of safety. The lifting appliance should be checked frequently and replaced in time in case of wear

2) safety technology of heating and heating furnace

safety of fuel and combustion. The fuels used in industrial furnaces are divided into solid, liquid and gas. Different types of fuel and combustion have different safety requirements. Gaseous fuels have the advantages of convenient transportation, easy ignition and complete combustion. However, some gaseous fuels are toxic and have explosion hazards. Safety operation procedures shall be strictly observed during use. When using liquid fuel, it should be noted that the preheating temperature of the fuel should not be too high, and the amount of heavy oil entering the nozzle during ignition should not be more than the amount of air. In order to prevent the rupture and explosion of the oil pipe, the corrosion of the oil tank and pipeline shall be regularly inspected. Fireworks are prohibited near the oil tank and oil pipe circuit, and fire extinguishing devices shall be equipped

industrial furnace accidents are mostly caused by incomplete maintenance, inspection and operation errors. First of all, check whether all systems are in good condition, strengthen the maintenance work, timely find out the hidden parts, and quickly rectify to prevent accidents, and the oil delivery valve is noisy

safety precautions for soaking pits, heating furnaces and heat treatment furnaces: various driving devices shall be equipped with safety power supply, pipes and valves of hydrogen, nitrogen, gas, air and drainage systems, various measuring instrument systems, as well as various sampling and analysis instruments and fire, explosion and gas prevention equipment, which must be complete and intact

3) cold rolling production safety technology

cold rolling production is characterized by low processing temperature, no iron oxide scale and other defects on the product surface, high finish and fast rolling speed. Pickling is mainly to remove the oxide scale on the surface. During production, attention shall be paid to: ① keep the protective device intact to prevent mechanical damage; ② Pay attention to the wearing requirements to prevent acid splashing and burning

the cold rolling speed is fast. Pay attention to the position of the cleaning roll. The grinding roll must be stopped. When handling an accident, it must be stopped. Cut off the main power supply and restore the handle to the zero position. When X-ray thickness measurement is adopted, reliable anti ray device shall be provided

heat treatment is the main process that consumes 4 pieces of aluminum foil in one experiment to ensure the performance of cold rolled steel sheet. The existing accident risks include fire, poisoning, furnace switching and coil dropping. The protective measures are as follows: ① when operating in the gas area, the gas safety operation regulations must be strictly observed to keep the ventilation equipment in good condition; ② If the lifting appliance is worn, replace it in time to prevent injury

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