加拿大焦煤和国内几种常用焦煤的结焦性差异

Coking Property Difference Between Canada Coals and Some Domestic Coking Coals

研究了加拿大焦煤和国内常用主焦煤的结焦性差异,有利于国内焦化企业很好地利用加拿大炼焦煤,优化配煤生产。对加拿大焦煤和国内常用焦煤进行常规煤质分析和煤岩特征分析,探寻了二者黏结性存在差异的原因,并利用40 kg小焦炉进行加拿大焦煤替代国内优质焦煤实验。研究表明:与国内主焦煤相比,加拿大焦煤的单一性较好,灰分较低,变质程度较低;加拿大焦煤的基氏流动度lg MF和奥亚膨胀度b值较低,均质镜质组较少,且镜质组中含有较多裂纹和气孔,造成加拿大焦煤在成焦过程中熔融阶段流动性较小,膨胀压力较小;加拿大焦煤替代国内优质炼焦煤进行配煤炼焦,可以稳定焦炭质量。

It was benefit for domestic coking enterprise to make good use of Canada coals and optimizing coal blending, by studied the difference of caking property between Canada coals and main domestic coking coals. To explore the reason of differences of caking property of these coals, the conventional coal quality and petrography analysis of these coals was studied and test Canada coals replace domestic high quality coking coals by 40 kg poilt coke oven test. The result showed that：compared with the domestic coking coals, ash content and metamorphism degree of Canada coals was lower, and it has good singleness;Canada coals has lower Giseeler fluidity lgMF and AoYa dilatation b value, there was less homoge-neous vitrinite in it, and it had more crack and pore in vitrinite maceral, which make lower fluidity and expansion pressure in melting stage of coking process;Canada coals can replace domestic high-quality coking coals for coking, and can stabi-lize the coke quality.