干燥和压团工艺对含锌尘泥团块质量的影响研究OA

This study addresses the treatment challenges of zinc-containing slag dust in the metallurgical industry,investigating the effects of compaction and drying processes on pellet quality.By optimizing parameters such as raw material ratios,moisture content,pressure,binder dosage,drying temperature,duration,and bed thickness,an optimal process configuration was established.Results demonstrate that the ideal compaction conditions consist of:30%zinc-containing baghouse ash,20%dust removal ash,50%metallurgical tailings,10%moisture content,20 MPa pressure,and 1%composite binder dosage,yielding pellets with a drop strength of 2 cycles/0.5 m and compressive strength of 965 N/piece;performance was further enhanced using a roller press(drop strength:9.2 cycles/0.5 m;compressive strength:1,272 N/piece),with a burst temperature ranging from 450℃-475℃.The optimal drying parameters include 105℃temperature,3-hour duration,and 13 mm bed thickness,achieving a dry pellet powder loss rate of 0.14%,compressive strength of 2,805 N/piece,and drop strength of 4.0 cycles/0.5 m.These optimized processes significantly improve pellet strength and stability,providing reliable pretreatment support for subsequent reduction and resource utilization of zinc-containing slag dust.