在现代工业的建设安装过程中,焊接要使用大量的焊条。一般焊条的药皮中合10～20％的锰铁或金属锰。各种钢材,合金中也有一定量的锰。在焊接作业时尽管劳动环境防护条件逐渐改善,但在通风不良的车间內或在管道容器內进行焊接作业,长期接触大量锰烟有可能引起中毒。我们曾先后确诊 In the construction and installation of modern industry, welding to use a large number of electrodes. General welding electrode in the co-10 to 20% of ferromanganese or manganese metal. A variety of steel, alloy also has a certain amount of manganese. Despite the gradual improvement of working environment protection during welding operations, long-term exposure to a large quantity of manganese smoke may cause poisoning in welding work in poorly ventilated workshops or in pipelines. We have confirmed