兰炭用作高炉喷吹燃料的试验分析

为了研究兰炭用作某钢铁企业高炉喷吹燃料的可行性,对兰炭和高炉喷吹煤的可磨性、爆炸性、燃烧性、反应性等进行试验。结果表明,兰炭工业分析指标整体上接近无烟煤,满足高炉喷吹用煤指标要求。与无烟煤相比,兰炭灰分略高、硫分较低、发热值略低、挥发分较高;兰炭可磨性低于无烟煤,应与可磨性较好的无烟煤B、无烟煤C和无烟煤F搭配喷吹;兰炭属无爆炸性煤质,喷吹无安全隐患;兰炭燃烧性能低于无烟煤,但用兰炭替代无烟煤E不会影响高炉喷吹效果;兰炭反应性优于无烟煤,对喷吹燃料的整体反应性有提升作用,有利于保护焦炭。兰炭合理喷吹配比应控制在20%以内。

Experimental analysis on use of semi-coke as fuel for blast furnace injection

In order to study the feasibility of semi-coke used as fuel for blast furnace injection in an iron and steel enterprise, the performance such as grindability, explosibility, combustion and reactivity of semi-coke and coal is tested. The results showed that the proximate analysis indexes of semi-coke were close to anthracite overall, which met the index requirements for BF injection. Compared with anthracite, semi-coke had slightly higher ash content, lower sulfur content, slightly lower calorific value and higher volatile matter. The grindability of semi-coke was lower than that of anthracite, it should be combined with anthracite B, anthracite C and anthracite F with better grindability. Semi-coke belonged to non-explosive coal, and there was no potential safety hazard for injection. The combustion of semi-coke was lower than that of anthracite, but the replacement of anthracite E by it will not affect the injection effect. The reactivity of semi-coke is better, which will improve the overall reactivity of injected fuel and protect coke. The reasonable injection ratio of semi-coke should be controlled within 20%.