高炉氧煤强化炼铁工艺的开发

The Development of Oxy-coal Injection into Blast Furnace for Intensitying Ironmaking Process

高炉氧煤强化炼铁是一项有很大经济效益的新工艺。实验研究和生产实践结果表明,喷吹烟煤、降低煤粉灰份、提高炉缸热水平、改善煤气利用都可以有效地提高置换比;提高风温、采用高效氧煤枪并直接在风口直吹管局部富氧、强化氧煤混合、采用配煤技术和配入燃烧促进剂等方法均可有效地提高煤粉燃烧率。

The injection oxygen and pulverized coai into blast furnace for intensifying Ironmaking process is of tremendous profits. The results of the experimental study and production practices show that the coal / coke replace rate can be raised by injecting the bituminous coals into blast furnace, decreasing the ash content in coal, increasing the temperature of the hearth in blast furnace, improving utilized level of gas, and the combustion rate of pulverized coal can be raised by increasing blast temperature, using the oxygen-coal lance with high efficiency which can supplied full oxygen directly to blowpipe of blast furnace and intensify mixing between oxygen and pulverized coal, using dispensation technique of coals, adding combustion accelerative agent to pulverized coal.