润磨强化镜铁精粉烧结特性的研究  

Improvement of Sintering Behaviors of Brazilian Specularite Concentrate by Damp Milling

作　　者：朱德庆[1] 王志远[1] 潘建[1] 李建[1] 徐小锋[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《钢铁》2007年第1期12-16,共5页Iron and Steel

基　　金：自然科学基金;宝钢基金联合资助项目(50274072)

摘　　要：巴西镜铁精粉难制粒反应性差,通过润磨单一镜铁矿或其与石灰石的混合料可改善其表面性质和高温反应性能。测定润磨预处理前后巴西镜铁矿的润湿热、粒度组成及变形温度等指标,揭示其作用机理。并通过烧结杯试验,考察润磨预处理强化烧结的效果。研究结果表明,润磨改善了巴西镜铁矿的润湿热,表面亲水性得到改善;降低了变形温度,提高了巴西镜铁矿的高温反应性能。巴西镜铁矿预处理后,烧结矿产量和质量得到大幅度改善,成品率增加了3.7%,转鼓强度提高了3.33%,固体燃耗降低了约4 kg/t,利用系数提高22.4%,烧结矿质量完全能满足高炉生产的需要。One type of Brazilian specularite concentrate has poor granulation and sintering properties. However its surface characteristics and sintering capability can be improved through damp milling or mixing with limestone. The mechanism was revealed by measuring wetting heat, changing of size distribution and softening temperature , and so on. The effect of pretreatment was proven through sintering test. Results show that wetting heat of Brazilian specularite is improved resulting in better hydrophilicity and softening temperature of Brazilian specularite is reduced so that its high temperature reaction capability is increased. With pretreatment, the output and quality of slnter are improved greatly, with yield increased by 3, 7%, tumbler index raised by 3.33%, solid fuel consumption decreased by about 4 kg/t and utilization rate increased by 22.4%, and sinter quality can meet the requirement of blast furnace operation.

关 键 词：镜铁矿精粉 烧结 润磨 变形温度 亲水性 

分 类 号：TF046.4[冶金工程—冶金物理化学]