The gas deposition industrial area is mainly distributed in the tuyeres and various platforms of the blast furnace body, as well as in the dust removal and hot blast furnaces where the gas pipeline results. Fixed gas alarms should be installed in areas where people are frequently present. Patrols should wear gas alarms and not less than 2 people. 2. High temperature slag iron casting site personnel must wear labor protection pure cotton underwear and operate according to operating procedures. Clean the slag iron. Every time the iron is cast, it is necessary to spray the iron mouth, which requires that the time for each cast should be uniform, and the interval time for casting should not be artificially shortened or extended to avoid insufficient slag iron cans and blockage of the iron mouth due to not spraying