含铁尘泥高碱度内配碳球团自还原过程中脱硫和脱磷研究

在竖式碳管炉中进行含铁尘泥高碱度内配碳球团的还原试验,并通过改变温度、配碳比和碱度对含铁尘泥还原过程中的脱硫和脱磷进行研究。结果表明,高碱度内配碳球团在高温下快速还原制备金属铁粒的脱硫率高于97%,铁粒中硫含量最低达到0.007%,而脱磷率一般为25%~35%,最高达到38.52%。随着温度和配碳比的升高,铁粒的脱硫率和脱磷率均增加;而随着碱度的增加,铁粒的脱硫率和脱磷率均先增大后减小。

Desulphurization and dephosphorization during self-reduction of high basicity iron-bearing carbon-containing dust pellets

High basicity iron-bearing dust pellets containing carbon were self-reduced in vertical tube furnace, and desulphurization and dephosphorization in the process of self-reduction were investigated by changing the temperature, carbon ratio and basicity. The results show that the desulfurization rate in the high basicity pellets is higher than 97% in rapid reduction at high temperature, and the lowest sulfur content in iron bead is as small as 0.007%, while the dephosphorization rate is generally between 25% and 35% with the highest at 38.52%. With the increase in temperature and carbon ratio, the rates of desulphurization and dephosphorization also increase; and with the increase of basicity, dephosphorization and desulfurization rates first increase and then decrease.