重点研究焦炭在高炉块状带内的抗压强度与温度和反应程度的关系。使用1台热模型对高炉块状带进行了模拟研究，1台可调气氛高温抗压试验机对所获焦炭试样进行了抗压强度检验，得到了焦炭在实际温度下的反应后抗压强度分布。在高炉间接还原区内，焦炭抗压强度随温度的升高而直线下降，在高温区内强度下将更为严重。焦炭失碳率是影响其强度的主要因素，在高煤比条件下应采用高反应性煤种并保留适量未燃煤，以保护焦炭强度。
The relationship between temperature, carbon loss rate and compression strength of coke in the lumpish section of blast furnace was investigated. A simulative research on the lumpish section in a blast furnace was completed using a hot model. The compression strength of the coke samples was measured using a compression testing machine with adjustable atmosphere at practical temperatures. The distribution of coke strength after reaction was obtained. In the indirect reduction section of blast furnace, the relationship between compression strength of coke and temperature is linear. In the lower section, the strength decreases rapidly with the rising of the temperature. The carbon loss rate of coke is the main factor affecting its strength. In the condition with high coal rate, coals with good reactivity and a suitable combustion ratio should be used to protect the coke strength.
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