细磨对矿粉特性和造球性能的影响  

Influence of milling on property and ballability of iron concentrate

作　　者：蔡皓宇[1] 青格勒[1,2] 张卫东[1] 刘洪松[1] 田筠清[1] 马丽[1] 

机构地区：[1]首钢集团总公司首钢技术研究院,北京100043 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁》2015年第8期16-23,共8页Iron and Steel

摘　　要：为了研究细磨对矿粉特性和造球性能的影响,利用球磨机对某种粒度较粗的矿粉进行不同程度的细磨,然后按照不同的配比进行混合,制成11种不同粒度组成的矿粉试样,对11种矿粉进行物理性能测试和造球试验。结果表明,随着磨矿时间的延长,细磨后矿粉颗粒形貌变化不大,但细颗粒质量分数增多,矿粉的比表面积增加,毛细水质量分数增加,而分子水质量分数无明显变化规律。矿粉的比表面积与矿粉中细微颗粒（小于10μm）的质量分数有很大关系。生球的落下强度由比表面积和粒度组成共同决定,当矿粉比表面积为1 500~2 500 cm2/g时,矿粉中大于76.33和小于10μm粒级的质量分数为10%~15%,有利于造球和生球落下强度的提高。In order to research the influence of milling on property and ballability of iron concentrate,some kinds of iron concentrate were milled by ball mill in different degrees. And 11 kinds of samples were made by mixing the milled iron concentrate with different ratios. Then,some physical property tests and pelletizing on the samples were carried out. The result indicated that,as the time of milling increases,the appearance of particles after milled remained unchanged,the content of fine particle,the specific surface area and the content of capillary water all increased,but the content of molecular water did not change significantly. The specific surface area was mainly influenced by the content of fine particles（ 10 μm）. However,the strength of green pellets was mainly influenced by the specific surface area and particle size distribution. The content of 76. 33 μm fraction and 10 μm fraction should be controlled between 10%-15% to make sure the pelletizing property and strength of green balls were better,when the specific surface area of iron concentrate lies between 1 500-2 500 cm2/ g.

关 键 词：球团 粒度组成 造球性能 生球强度 

分 类 号：TF046.6[冶金工程—冶金物理化学]