8月3日18时30分,兰州市焦家湾废旧钢材批发市场内几名工人在现场作业时,发现回收的3个直径1米左右、长度近2米的氯气罐中一个向外冒着毒气。因不知其害,并没在意。后两名工人被毒气熏倒,另几名工人出现中毒反应,这才开始撤离现场。冒出的氯气随风到处散发,加之正是吃晚饭的时候,居民集中,致使住在附近 At 18:30 on August 3, Lanzhou City, Jiao Jia Wan scrap steel wholesalers in the field several workers found that the recovery of the three diameter of about 1 meter, a length of nearly 2 meters in the chlorine tank one braved poison gas. I do not know because of harm, did not care. After the two workers were poisoned gas poisoning, and the other workers appeared poisoning reaction, which began to evacuate the scene. Exposed chlorine distributed around the wind, combined with the time it is eating dinner, residents concentrated, resulting in living nearby