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关于铸工作业的石棉危害问题国内外报道甚少,就此问题本文对某厂铸钢、铸铁两上铸造车间进行了调查分析和探讨。1 铸造工艺的石棉危害铸造工艺中扣箱环节要求用石棉绳做为砂型密封物(沉箱和小活一般不用),清铲后石棉随同落砂混合为废砂、废砂经过处理后重复使用,此环节即为混入石棉的原因。该厂所用石棉为温石棉(chysotile),化学式为3MgO.2Sio_2.2H_2O。用量为700kg/Y 左右。2 作业现场空气中粉尘浓度和石棉纤维浓度
There are few reports on asbestos endangering hazards in casting industry at home and abroad. In this paper, the casting workshop of cast iron and cast iron in a factory is investigated and discussed. Asbestos Hazard in Casting Process Asbestos rope in the casting process requires asbestos rope as a sand seal (caisson and small living generally do not use), shovel asbestos with sand mixed with sand, waste sand after treatment repeated use, This is the reason for mixing asbestos. The plant used asbestos chrysotile (chysotile), chemical formula 3MgO.2Sio_2.2H_2O. The amount of 700kg / Y or so. 2 dust concentration in the air at work site and asbestos fiber concentration