电渣焊操作中存在下列不安全因素 :①因冷却水槽漏水、漏渣等 ,可能造成喷溅、爆炸 ,从而引起灼伤和火灾。②从熔池中析出二氧化硅、氧化锰、氟化物等有害气体 ,在通风不良的条件下 ,不利焊工健康。③在防护工作和装配不完善的条件下 ,存在触电危险。④存在熔池的热辐射和弧光? The following unsafe factors exist in the operation of electroslag welding: ① Water leakage, slag leakage and the like may cause splashes and explosions, which may cause burns and fires. ② precipitated from the pool of silica, manganese oxide, fluoride and other harmful gases, in poor ventilation conditions, adverse welder health. ③ In the protective work and assembly imperfections, there is a risk of electric shock. ④ there is thermal pool and arc radiation?