罐式炉低温煅烧理论的研究与应用

Research and application of low temperature calcination theory in retort furnace

通过实验室研究,分析罐式炉煅后焦晶粒尺寸和煅后焦质量指标与最高煅烧温度的关系,得到如下结论:煅后焦最高煅烧温度控制在1200～1250℃,较传统的罐式炉工艺低50～100℃,更加适合预焙阳极的生产。鉴于此提出罐式炉低温煅烧理论,并通过现场应用,实际应用结果表明:同尺寸的炉型,低温煅烧产量较传统的高16%;煅烧焦真密度基本控制在2. 05～2. 07g/cm3之间;煅烧焦粉末电阻率控制在448～540μΩ·m范围内;而煅烧焦CO2反应率基本保持在6%～10. 5%。罐式炉低温煅烧理论不仅能满足煅后焦质量要求,更能减少预焙阳极在电解槽上的掉渣。

The relationship between CPC crystal size/quality and the maximum calcination temperature was analyzed through laboratory research,indicating that the maximum calcination temperature of CPC is controlled within 1200~1250℃,50~100℃ lower than the traditional retort furnace,which is better suitable for prebaked anode production.The low temperature calcination theory of retort furnace is thereby proposed and applied on the site.The application results show that the low temperature calcination output is 16% higher than the traditional one for the same size furnace;the real density of CPC is controlled within 2.05~2.07g/cm 3,the electrical resistance of CPC powder is controlled within 448~540μΩ·m,and the CO 2 reactivity of CPC remains basically at 6%~10.5%.The low temperature calcination theory of retort furnace can not only meet the CPC quality demand,but also reduce the amount of slags dropped from prebaked anode on pots.