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电焊系利用电弧放电时产生的热量,熔化焊条和焊件以便凝固形成牢固结头的工艺过程。被广泛应用于工业生产中,据报道全国从事电焊作业的工人已逾十万之多。一、危害因素: 在焊接时,可产生强烈的弧光,电弧温度高达3000～6000℃。并发射高强度的紫外线、红外线和可见光;同时也产生大量的气溶胶,经研究不同的焊条产生的焊尘颗粒直径一般为0.04～0.4微米,含有铁、锰、铬、镍、铜、铅、硅、氟等20多种元素,并产生一氧化碳,二氧化碳、臭氧、氮氧化物、氟化氢等多种有毒气体。作业场所焊尘和毒气的浓度取决于焊条种类、
Welding utilizes the heat generated during arc discharge to melt the electrode and weldment to solidify to form a firm knot. Is widely used in industrial production, it is reported that the country engaged in welding work more than 100,000 workers. First, the hazardous factors: In welding, can produce a strong arc, the arc temperature up to 3000 ~ 6000 ℃. And emits high intensity of ultraviolet, infrared and visible light; also produces a large number of aerosols, the diameter of the welding dust generated by the different welding rod is generally 0.04 to 0.4 microns, containing iron, manganese, chromium, nickel, copper, lead, Silicon, fluorine and other 20 kinds of elements, and produce carbon monoxide, carbon dioxide, ozone, nitrogen oxides, hydrogen fluoride and other toxic gases. The concentration of welding dust and gas at the workplace depends on the type of electrode,