加热速度对焦炭质量影响研究

Study on Effect of Heating Rate on Coke Quality

进行了炼焦加热速度对焦炭质量影响试验,研究了加热速度对炼焦煤黏结性及炼焦过程的影响。结果表明,提高炼焦加热速度,各煤样奥亚膨胀度指标明显向高温侧移动,软化温度区间增大,其中对有黏结性的瘦焦煤和焦煤的提升幅度明显大于肥煤。在试验用煤条件下,炼焦升温速度15℃/h、升温终温1 060℃、降温速度10℃/h时,焦炭质量提升最为明显。以最佳温度制度指导优化配煤炼焦,可使弱黏结性1/3焦煤用量增加3个百分点,同时保证焦炭质量稳定向好。

Experiments on the effect of heating rate in coking on coke quality were carried out.The effect of heating rate on cohesiveness of coking coal and coking process was studied.The study results demonstrated that the Audibert-Arnu dilatation index of coal samples significantly approached to the side with high temperature while the softening temperature range was expanded as the coking heating rate was raised.Among coals,lean coking coal and coking coal with cohesiveness approached much significantly than fat coal.Under the experiments on these coals,when the heating rate for coking was 15℃/h,the final temperature by heating was 1060℃and the cooling rate was 10℃/h,the quality of coking coal was improved most obviously.So depending on optimum temperature system for carrying out coking by optimized coal blending,the amount of 1/3 coking coal with weak cohesiveness was increased by 3 percentage points while the stability of coke quality was guaranteed at the same time.