我们七号小高炉(容积6.5立方公尺), 自一九五八年十二月中旬开始在热风炉试验和改装多咀燃烧以来,产量和质量都有很大提高。过去炼的生铁,日产只二吨三吨,这是白口铁占多数;现在炼的全是灰口铁,日产量稳定在六吨以上,七号小高炉的热风炉(宽3.33公尺,长6公尺,高3.33公尺)原来只有二个燃烧咀,炉内煤气燃烧 Our small No. 7 blast furnace, with a capacity of 6.5 cubic meters, has seen a great improvement in both output and quality since it was tested in a hot stove and converted to multi-burner combustion since mid-December 1958. In the past, the pig iron produced only two tons and three tons per day. This is the majority of white iron. Now it is all gray iron and its output is stable at more than six tons. The small-sized blast furnace hot blast stove (3.33 meters wide, 6 meters long, 3.33 meters high) had only two burning Tsui, furnace gas combustion