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长航芜湖裕溪口作业区的装煤工人,在工作中经常接触含有游离二氧化硅的煤尘。我们于1980年6月对该地区运输线上各点,分别用滤膜进行粉尘采样(采样器型号鞍劳D-4型),以钼兰比色法测定其游离二氧化硅含量,结果各煤种的含量平均在8％左右。对煤矿尘肺分类问题,根据国内经验,主要以工种和游离二氧化硅含量的不同分为三类。据此,该区工人的尘肺拟属煤肺。由于煤块中仅含有少量的游离二氧化硅,故其在肺部引起的病变不同于矽肺。目
Changhang Wuhu Yuxikou operating area of coal-loading workers, often exposed to work in contact with free silica dust. We were in June 1980 on the transport lines in the region, respectively, with a dust sampling filter (sampler type saddle labor D-4 type), molybdenum blue colorimetric determination of free silica content, the results of each Coal species average about 8%. According to the domestic experience, the classification of pneumoconiosis in coal mines is mainly divided into three types according to the different types of work products and free silica. Accordingly, the pneumoconiosis of workers in the area is intended to be coal lungs. Since coal blocks contain only a small amount of free silica, they cause lesions in the lungs that differ from silicosis. Head