基于低温炼铁技术酸性高炉渣流动性的实验研究

Experimental Research on Acidic BF Slag Fluidity at Low-temperature Iron-making

用分析纯化学试剂配制高炉炉渣,研究基于低温炼铁技术MnO和Na2CO3含量对高炉渣熔化温度及黏度的影响,并用XRD分析缓冷后熔渣的矿相。结果表明:MnO能促进高炉渣形成大量的钙镁、钙铝黄长石,同时形成含锰的复杂化合物,这些物质能有效降低高熔渣的熔化性温度及黏度;当MnO质量分数在2.0%左右、1 400℃时,高炉渣黏度能达到0.564 Pa.s;Na2CO3能扩大炉渣的软熔区间,但对高炉渣的黏度影响不大。

Effect of MnO and Na2CO3 contents on melting temperature and viscosity of BF slag was measured by analytical reagents based on low temperature iron-making technique, and then mineral phases of cooling slag were analyzed by XRD. Results show that MnO can promote the generation of lots of aluminium-melilite and akermanite of slag and some complex compounds of manganese, which can effectively reduce the melting temperature and viscosity of the slag. When MnO content is about 2.0%, the viscosity of BF slag is close to 0.564 Pa. s at 1 400 %; Na2CO3 can expand BF slag cohesive interval, but it has little effect on the viscosity of BF slag.