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从历年监测结果看出,粉尘浓度基本控制在10mg/m~3以下,80%以上的粉尘粒子小于2μm,游离二氧化硅含量除个别研磨作业外,约小于4%。观察者与对照者配对调查看出,接尘工人的肺功能及尿中钴含量与对照均有差异。接尘工人胸片中有0.50%出现O~+线改变,其平均接尘工龄为21.3年,平均累计接尘量为182.24mg/m~3·a。
According to the monitoring results over the years, the dust concentration is basically controlled below 10mg / m 3, and more than 80% of dust particles are less than 2μm. The content of free silica is less than 4% except for individual grinding operations. Observer and control paired survey found that workers exposed to lung function and urine cobalt levels were different with the control. Dust workers chest radiograph 0.50% O ~ + line changes, the average dusting service life of 21.3 years, the average cumulative amount of dust was 182.24mg / m ~ 3 · a.