Four categories dangerous job accidents, steel enterprises shall focus on prevention
In recent years, the iron and steel enterprises many incidents of gas operating, confined space operations, molten metal, of jobs and dust explosion. The author has combed the mechanism of these types of accidents and precautions, sounded a warning intended for the enterprise and to provide reference for the iron and steel enterprises to develop production safety management measures.
Accident type is a gas dangerous job
Iron and steel enterprises in the blast furnace gas, coke oven gas, converter gas generation and usage, gas equipment maintenance and hot work in gas equipment inside and outside, with a gas job, gas kiln ignition, such as more dangerous job, gas accident occur. The the gas dangerous job security has an important role in protection the anterograde and energy saving steel production.
Gas job hazards are mainly three kinds of gas poisoning, fire, accidents, gas explosions. The gas poisoning essence gas contains carbon monoxide poisoning. For example, the the converter gas carbon monoxide content of up to 60% to 70%, very toxic. Fire accident when fire accidents occurred in the gas combustion is not controlled.
Metallurgical gas pipes large diameter (up to 4000 mm), fire fighting very difficult, extinguishing improper also backfire explosion. Gas burning is usually the prelude to a gas explosion, and equipment such as gas explosions. Metallurgical coal gas, coke oven gas, explosive strongest explosion limit of 4.5% to 35.8% from 30.8% to 89.5%; blast furnace gas explosion limit from 18.2% to 83.2%; converter gas explosion limit. To prevent the focus of the gas explosion is to control the mixing of the gas and air, so that it can not reach the explosion limit.
Run gas equipment, hot work, must keep the pressure of the gas inside the device, that is, positive flare up, does not allow the negative pressure flare up. Flare up the process, to have someone monitoring the pressure, where there is difficult to control the pressure, holding pressure should be filled with nitrogen or steam. Hot work construction workers to stand upwind of the welded parts and wear respirators or long tube respirator in case of emergency. Explosive gas equipment, hot work can easily explode, so the memory must be thoroughly cleaned gas.
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