强力混合强化微细粒精矿烧结的工艺试验分析

Technologic experiment analysis of sintering process of super fine-grained concentrate strengthened by strong mixing

为了研究强力混合工艺对微细粒精矿粉烧结的作用,针对太钢微细粒精矿为主的烧结原料结构,系统开展了强力混合对制粒效果、烧结指标影响的研究。结果表明,与传统圆筒混合、制粒工艺相比,强力混合因强化了水分的分散和物料混匀,适宜制粒水分明显降低,混合料制粒效果明显改善,制粒强度提升,有利于减少粉尘排放量。对于太钢原料结构而言,适宜的强力混合-制粒工艺流程为圆筒混合+强力混合+圆筒制粒,烧结速度和利用系数大幅提升,烧结效果得到改善。

In order to study the effect of intensive mixing process on the sintering of fine concentrate powder,as for the sintering with super fine-grained concentrate in TISCO,the influence of intensive mixing on granulating effect and sintering index was studied systematically.The results indicated that compared with the traditionally drum-dominated mixing and granulation process,applying the intensive mixing strengthened the uniform distribution of moisture and raw materials,which remarkably reduce the suitable pelletizing water and improved the granulation effect.The mechanical strength of granules achieved an improvement as well,which benefited the reduction of dust in the flue gas.As for the material structure used in TISCO,proper mixing and granulation process with the intensive mixing was drum mixing+intensive mixing+drum granulation.Under this process,the sintering speed and productivity were obviously increased,and the whole sintering performance were improved.