沙钢5800 m3高炉开炉至今，运行状况良好，在长期实践中，摸索出了合理的喷煤比。在保证氧过剩系数、理论燃烧温度和透气阻力系数的前提下，提出合理的喷煤比还应保证合适的炉腹煤气量指数。根据沙钢5800 m3高炉的实际操作数据，提出氧过剩系数应高于0.71，理论燃烧温度约为2350℃，透气阻力系数约为1.8～2.0。研究发现，由于5800 m3高炉的炉缸直径偏小，合理的炉腹煤气量指数应在68 m/min以内。该高炉在原燃料和操作稳定的前提下，合理的喷煤比约为180 kg/t。
Since blown,the Shasteel 5800m3 blast furnace is operated stably and smoothly. According to the operating ex-perience,reasonable pulverized coal rate has been found. Oxygen excess ratio,theoretical flame temperature and per-meability resistance index have been considered. Besides,boshgas volume index should also be considered. Accord-ing to actual operation data,the oxygen excess ratio should be above 0.71,and the theoretical flame temperature should be 2 350℃,and permeability resistance index should be in the range of 1.8-2.0. At the same time,the reasonable bosh gas volume index should be no more than 68 m/min. It is because of smaller hearth diameter of 5800m3 blast furnace. If the raw materials and operation are stable,the proper pulverized coal rate is 180 kg/t.
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