含碳球团还原法处理含锌电炉粉尘的试验分析

Pilot-plant Test of EAF Dust Treatment Include Zinc

为综合利用含锌电炉粉尘，提出运用含碳球团的还原处理方法，并进行了扩大性试验，得到了还原焙烧法的合理工艺条件。试验表明：配碳的碳氧比C／O=1．2、还原温度1150℃、料层厚度30mm、加热时间65min可取得较好的效果；还原后的球团为半金属化球团，其w（TFe）为50％左右，金属化率60％～70％，球团的残Zn含量在2％以下，是较好的高炉原料；Zn的还原挥发率达到90％左右，收集粉中ZnO含量在90％左右；PbO含量在2％以下，已达到等级氧化锌的标准，实现了含锌电炉粉尘的无害化和资源化利用。

Investigated the electric arc furnace （EAF） dust with carbon-containing pellets direct reducing technology, carried out the expanding experiment in laboratory, and got the better parameters of roasting reduction method： excess coefficient of carbon is 1.2, reduction temperature is 1150℃, anticipate thickness is 30 mm, reduction time is 65 min. The treated pellets were semi-metallic pellets. Total Ferrum content in the treated pellet was about 50%, the best got up to 54.7% ; metallic ratio was about 60% -70%, the best got up to 88% ; zinc oxide content in the collected zinc oxide powder exceeded 90%, which proved that it succeeded to recycle electric arc furnace（EAF） dust for carbon-containing pellets direct reducing technology.