Description：
1. Lightning strokeMetal smelting enterprises are generally located in suburban areas or outer suburbs, and occupy high buildings such as 2,000-m3 blast furnace with height up to 100 m, multilayer steel structure main workshop (for steel making, rolling, etc.), and abounding chimneys. Lightning stroke in this case will halt their production in large scale and cause vast direct economic losses.Accident caseOn April 5, 2012, a steel pipe plant in Yangzhou, Jiangsu was struck by lightning, which ignited the paint for spraying steel pipes and caused big area fire. As a consequence, the plant suffered serious losses.2. Fault arcBeing of vast scale, complicated technologies, strict processes, metal smelting enterprises are equipped with, more electric rooms, control rooms and operation rooms, an...
Description：
1. LightningLocated in open fields, the junction of rock and soil, and the place with sudden change in earth resistivity, most coal mining areas are generally easily struck by lightning. Coal production and transport, besides, will generate vast coal dust, which increases conductivity after suspending in the air above such coal mining areas. When acting on the metal pipes and cables of pit, the electromagnetic pulse of lightning stroke will generate overvoltage to interfere with or damage the electronic equipment in pit and then paralyze monitoring systems such as methane monitoring system, fan monitoring system and personnel location system, hence causing production accidents and casualties. Accident case:On the morning of April 24, 2004, Renhua County, Guangdong was attacked by...