炼焦配煤中添加剂对焦炭质量的影响

Influence of binder and reinforcing reagent on coal blending test

以华北地区某焦化厂炼焦用煤为研究对象,通过对基础煤样和添加剂性质分析,说明各煤样及添加剂的优势和不足,并提出了具体的配煤方案,得到了配合煤及焦炭的性质。依据煤岩学观点和共炭化炼焦理论,以焦油沥青、石油沥青替代部分强黏结煤,或以焦粉、石油焦作为瘦化剂炼焦,通过与基础炼焦煤配合后进行炼焦试验,对添加剂在炼焦配煤中的作用进行分析。结果表明:沥青是较为理想的黏结剂,配入量以3%～5%为宜;无烟煤最佳配入量为5%;无烟煤、焦粉、石油焦是常用的瘦化剂,其中无烟煤提高焦炭耐磨强度作用显著,焦粉降低配合煤挥发分作用突出,石油焦在降灰及提高焦炭块度等方面作用更为明显。

Taking the coking coal applied in one coking plant in North China as object, analyse the properties of coal samples and additives, find their advantages and disadvantages, which provide the reference for the coal blending, then research the properties of blends and cokes. Based on the coal petrography and co-carbonization theories, replace parts of strong caking coal with tar pitch or petroleum pitch, or adopt coke powder and petroleum coke as leaning reagent. The analysis of additives function in blending coal show that, as one ideal adhesive, the most adaptive for pitch is 3 percent to 5 percent, for anthracite is 5 percent. Anthracite, coke powder and petroleum coke are common leaning reagents. In th aspect of improving coke abrasive strength, reducing volatiles, reducing ash and improving coke lumpiness, anthracite, coke powder and petroleum coke respectively is the best choice in turn.