废塑料配煤炼焦对焦炭质量的影响

Effect of co-carbonization of coal/plastic in coke oven on coke quality

为降低配煤炼焦生产中焦煤用量,提高废塑料利用率,利用废塑料代替一定比例焦煤,在40 kg实验焦炉中与煤共焦化,考察焦炭、焦油产率和焦炭强度的变化规律。结果表明:以质量分数为1%~5%的废塑料替代焦煤炼焦后,焦炭产率下降,焦油产率增加,M25先提高后下降,M10先下降后提高,焦炭的反应性提高,而反应后强度下降;当废塑料质量分数控制在3%以下时,焦炭的冷态强度和热态强度符合国家二级冶金焦炭质量分级标准。该结果为工业生产提供了参考。

Aimed at reducing the amount of coking coal in blending coking and improving the utiliza- tion rate of waste plastics, this paper is concerned specifically with an effort to replace a certain propor- tion of coal and coking coal with waste plastics to perform co-carbonization in 40 kg experimental coke ov- en, and investigate the law underlying the consequent variation in coke and tar yield and coke strength. The investigation suggests that the replacement of coking coal with waste plastics with a mass fraction of anywhere from 1% to 5 % gives rise to the following changes ： a decrease in the coke yield, an increase in the tar yield, an initial increase and subsequent decrease in M25, an initial decrease and subsequent in- crease in M^0 tion ; the addi , and an increase in coke reactivity, but a decrease in relative strength following the reac- tion of waste plastics of less than 3% allows the cold strength and hot strength of coke to remain up to the secondary standard of metallurgical coke for the grading index of national metallurgical coke quality. The study may serve as a reference for relative industrial production.