500m^(2)烧结机强化混匀技术研究与应用

Research and application of enhanced mixing technology of 500m^(2) sintering machine

针对实际生产中,当混合机填充率无法达到设计水平以及混合料中配加难制粒物料时而导致的混匀制粒效果不理想,烧结矿转鼓指数差的问题,本文在500 m^(2)烧结机工艺中配加20%FMG粉矿的条件下,结合弗鲁德准数计算,对烧结机混料系统工艺进行了研究。结果表明,当一次混合机的设计转速低于合理转速(6.94 r/min)时,烧结混料系统混匀制粒效果较差,通过采取将一次混合机加水比例由80%降低至75%并后延加水位置3 m的技术措施,增强了一次混合机混合料的混匀水平,使混合料制粒效果由39.12%提高至48.98%,解决了配加20%的FMG粉矿之后出现的烧结混合料黏结团聚、制粒效果差的问题,消除了烧结矿断面不均匀现象,最终使得烧结矿转鼓指数由76.14%提高至78.44%。

In view of the problems,that is,unsatisfactory mixing&granulation effect and poor sinter drum index caused by the mixing rate of the mixer cannot reach the design level and the difficult granulation materials are mixed in the compound in actual production,under the condition of adding 20%FMG fine ore to the 500 m^(2)sintering machine process,combined with the Frouder criterion calculation,the process of the sintering machine compound system is studied.The results show that,when the design speed of the primary mixer is lower than the reasonable speed of 6.94 r/min,the mixing and granulating effect of the sintering compound system is poor.By taking such technical measures to reduce the proportion of water added to the primary mixer from 80%to 75%,and the position where it added water is extended by three meters from the original position,the mixing level of the compound of the primary mixer is enhanced,and the granulation effect of the compound is increased from 39.12%to 48.98%,the problems of bonding and agglomeration of the sintering compound and poor granulation effect are resolved after adding 20%FMG fines,the uneven cross-section of the sinter is eliminated,and the sinter drum index is increased from 76.14%to 78.44%finally.