高炉含锌粉尘还原性影响因素分析

为充分利用高炉粉尘中的Fe、C等有价资源,以水钢烧结除尘灰、高炉重力灰和高炉布袋灰为主要原料,根据配碳量的不同压制成冷固球团,不仅可以弥补单一成分成球性差的劣势,还可以充分利用粉尘中的有价资源进行自还原反应,结果表明,随着还原温度和反应时间的增加,球团的金属化率和脫锌率逐渐增加,反应溫度为1200℃时已达到了理想的实验效果,反应10min后,金属化率和脱锌率为87.13%和95.25%;随着配碳量的增加,金属化率和脱锌率呈现不同的趋势,当碳氧摩尔比在1.30左右时,金属化率和脱锌率的指标较理想。

Analysis on Influence Factors of Reductibility of Zinciferous Blast Furnace Dust

In order to make full use of valuable Fe and C in dusts from sintering and ironmaking,the sintering dust,the blast furnace gravitational dust and the cloth bag dust are taken as main materials,mixed in proportion and pressed to cold-bonded pellets with different carbon contents,which not only avoids the poor sphericity of single kind of dust,but also makes full use of components in dusts for self-reduction reaction of pellets at high temperature.The results show that the metallization rate and dezincification rate of pellets increase gradually with increase of temperature and reaction time.An ideal experimental effect has been achieved when the reaction temperature is 1200℃.The metallization rate and dezincification rate of pellets of 10 minutes reaction are 87.13% and 95.25% respectively.As carbon content increase,the metallization rate and dezincification rate show different trends.When the molar ratio of carbon to oxygen is about 1.30,the metallization rate and dezincification rate of pellets are better.