Occupational hazards and prevention of rolling mil

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Occupational hazards and prevention of rolling mills in metallurgical enterprises

rolling mills (rolli pressure is not small ng mills). The rolling mill involves many operations of hot rolling or cold rolling, which can be large-scale equipment with high automation, or small devices that still rely on a lot of manual labor. The rolling mill can be produced alone or combined with the primary production of metal. Now the general trend is to develop to large continuous automatic rolling mill

so far, the vast majority of rolling mills have rolled black July 5 colored metals, but non-ferrous metals, especially copper and aluminum, can also be processed by rolling mills. This entry summarizes that carbon fiber materials will become cheaper and cheaper to discuss rolling mills, but most of the discussion is also applicable to non-ferrous metal rolling mills

in the rolling mill, the ingots from the soaking pit are first processed on the blooming mill or slab mill to produce bloom, short billet or flat billet. Then the flat billets are rolled into steel plates and strips, and the square billets or short billets are rolled into structural steel, section steel and bars. Generally, hot rolling is used to process large sections, while cold rolling is only used for sections with small cross-section changes to make their surface state meet the requirements

after rolling (cooling if necessary), the products are cut into standard lengths and sent to the finishing section after bundling or finishing in other ways

hazards and their prevention

accident mechanization has reduced the rolling accidents of machines. But some places, especially in the cold rolling workshop and finishing section, are still prone to accidents

in cold rolling, especially when cleaning without stopping the machine, there is a danger of rolling between two rolls. Therefore, the roll gap should be properly protected and strictly supervised to prevent cleaning without stopping the machine. The dangerous parts of shears, cutting heads and edge trimmers should be strictly protected, otherwise serious accidents will be caused

if you try to cross the roller table at the place where crossing is not allowed, especially the roller table in the hot rolling workshop, serious industrial accidents may occur, so a sufficient number of bridges should be installed above the roller table, and it is stipulated that the roller table must be crossed from the bridge. Looper rolling may cause extensive injury and burns, especially serious injury to lower limbs, which requires a safety console and other protective facilities

on the strip mill and sheet mill, special attention should be paid to prevent workers from being cut. Not only are thin steel coils easy to cause such accidents, but the iron sheet used to bind steel coils will also cut workers. When handling the steel coil, it may cause serious injury due to the broken iron sheet

another hazard often encountered in strip and sheet rolling workshops is caused by spraying a large amount of oil and rust inhibitor. Although protective measures have been taken to limit the placement of products sprayed with oil or rust inhibitor, these products still accumulate on the floor and channels, which is easy to cause slip accidents. Therefore, in addition to wiping the ground regularly, gratings or oil absorbing materials should be laid on the ground, and boots with non slip soles should be provided to workers

even in automatic chemical plants, there will be accidents in the refitting work of replacing important rollers on the machine with little smoke and non-toxic seat during combustion. Good planning can often reduce the number of roll changes. It is very important that the roll change work should not be carried out under the condition of tight time, and appropriate tools must be available

although modern factories are becoming more and more automated, many small faults will occur, which often require staff to overhaul the whole set of equipment or part of the equipment under the condition of continuous operation. At this time, things such as forgetting to use mechanical protective devices for the hydraulic system will happen, which will lead to serious consequences. In workshops with hydraulic equipment, special attention should be paid to the deployment and organization of fire prevention. Because the danger of fire is often ignored when overhauling the hydraulic system

the clamp used to hold the hot material is stuck with the hot material. When the square head wrench is operated by hand to move the large rolled profile, the wrench may slide backward, causing serious injuries to the operator's head and upper body. The structure of all hand tools must be safe and reliable, and they must be regularly overhauled and properly maintained. The rivets of clamps used in steel rolling workshops must be replaced frequently. When replacing rolls, operators should use ring wrenches and socket wrenches instead of elbow open-end wrenches. Workers should receive adequate training on the use of hand tools. All hand tools shall be stored in proper places

many accidents are caused by improper lifting and handling or defects in traveling crane and lifting pulley. Therefore, all traveling cranes and lifting pulleys should be inspected regularly, and special attention should be paid to the slings in stock and in use. Crane drivers and hoisters shall be specially selected and trained. Mechanical transportation always has the risk of accidents. Locomotives, trucks and handling carts should be properly maintained, and the warning and signal system agreed by people must be adopted. The driving roads of forklifts and other trucks should be kept clear

many accidents are caused by the following reasons: falling, tripping or poor floor maintenance, disorderly stacking of objects, protruding steel ingot ends and stacking of rolls, etc. If all floors and access roads are well maintained, sidewalks are clearly specified, materials are stacked correctly, and the specified spacing is maintained between waste piles, the danger can be eliminated. All departments of the factory, including the storage yard, must be well sorted and kept. The whole plant should have good lighting facilities. Flying mill chips during hot rolling can cause burns or eye injuries. Splash prevention facilities shall be able to effectively reduce the splashing of mill scale and hot water. Dust particles and swinging ropes can cause eye injuries. Strong light also affects the eyes

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