碳化高炉渣处理技术研究

Study on the treatment technology of carbonized blast furnace slag

高钛型高炉渣经电炉碳热还原后生成含TiC的熔融碳化高炉渣,以其为原料进行了熔融碳化高炉渣处理技术研究,研究内容包括不同的冷却方式、破碎环境,以及颗粒粒度对目标产物TiC的影响规律。结果表明:风冷和水冷对熔融碳化高炉渣的TiC含量和微观形貌影响不大,但对晶粒尺寸有较大改变作用;保护气氛和非密闭环境破碎碳化高炉渣,对渣中TiC含量影响较大;不同粒度分布的碳化高炉渣其TiC含量区别较为明显,粒度小于0.038 mm时,碳化高炉渣中的TiC含量较低,粒度大于2 mm时,TiC含量达到最高,两者相TiC含量差异值一般为3.1%~3.7%。

The melt carbonized blast furnace slag containing TiC is produced through the carbothermal reduction of high-titanium blast furnace slag,with which the treatment technology of melt carbonized blast furnace slag is studied.The effects of different cooling methods,crushing environment and particle size on the target product TiC are studied.The results show that the air cooling and water cooling have little effect on the TiC content and micro-morphology of melt carbonized blast furnace slag,but with a relatively greater effect on the grain size;The crushing of carbonized blast furnace slag in protective atmosphere and non-closed environment has a great influence on TiC content in slag;TiC content of carbonized blast furnace slag with different particle size distribution is obviously different.The TiC content in carbonized blast furnace slag is lower when the particle size is less than 0.038 mm,and the TiC content reaches the highest when the particle size is larger than 2 mm.The difference of TiC content between the two phases is generally 3.1%~3.7%.