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我厂铸造车间,主要生产0.2kg～120kg的铸铁件。工艺上以干型为主和部分湿型铸造。干型是用一台L128落砂机落砂,靠行车将铸型吊到落砂机上,每隔2～3min进出一次。由于过去没有除尘系统,落砂时落砂机激烈振动、撞击,空气的扰动以及高温铸件产生的上升的热气流都会使粉尘飞扬。特别是干模大件落砂时扬尘量极大,大大地污染了工作环境。粉尘浓度最低处达30.6mg/m~3,粉尘浓度最高点竞达到171.4mg/m~3,严重地超标,极大地损害了工人的身心健康。同时型砂中死粘土及破碎的矽
I plant casting workshop, the main production 0.2kg ~ 120kg of cast iron pieces. Dry process-based and part of the wet-type casting. Dry type is a L128 falling sand machine off the sand, by car will be hanging to the mold off the mold, every 2 ~ 3min out once. Due to the absence of a dust removal system in the past, the sand was fiercely vibrated when it was dropped off, the impact, the air turbulence and the rising hot air flow from the high-temperature castings caused the dust to fly. In particular, large-scale dry sand dust off the great volume, greatly polluted the working environment. The lowest dust concentration reached 30.6mg / m ~ 3, the highest dust concentration reached 171.4mg / m ~ 3, seriously exceeding the standard, which greatly damaged the workers’ physical and mental health. At the same time sand in the clay and broken silicon