矿粉颗粒表面微观形貌对过滤性能的影响  

Effect of Surface Micro-morphology of Mineral Powder Particles on the Filtration Performance

作　　者：杨涛 青格勒 董香娟 贺金文 田筠清 张彦 Yang Tao;Qing Gele;Dong Xiangjuan;He Jinwen;Tian Junqing;Zhang Yan(Shougang Research Institute of Tecnology,Beijing,China;Beijing key Laboratory of Green Recyclable Process for Iron&steel Production Technology,Beijing,China;Department of Ironmaking Shougang Jingtang United Iron and Steel Co.Ltd.,Tangshan,Hebei,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043 [2]绿色可循环钢铁流程北京市重点实验室,北京100043 [3]首钢京唐钢铁联合有限责任公司炼铁部,河北唐山063200

出　　处：《矿产综合利用》2020年第3期185-189,共5页Multipurpose Utilization of Mineral Resources

摘　　要：为研究矿粉表面微观形貌对过滤性能的影响,将-200目80%的5种不同的铁精矿粉A、B、C、D、E在过滤压力0.06 MPa、过滤时间3 min的条件下进行过滤试验;并测定5种铁精粉的最大分子水和最大毛细水,用扫描电镜观察其微观形貌。试验结果表明:5种矿粉的滤饼水分、最大分子水和最大毛细水由大到小依次均是A、B、C、D、E,并且与矿粉的表面微观形貌密切相关。矿粉颗粒表面粗糙,吸附较多细小颗粒,其比表面积和表面能较大,毛细管作用较强,所含的最大分子水和最大毛细水较大;毛细管作用强使得过滤速率降低,毛细水的脱除难度增大,最终导致滤饼水分较高。In order to investigate the effect of iron concentrate’s surface micro-morphology on filtration,the filtration test of iron concentrates A,B,C,D and E with particle sizes-200 mesh 80%were respectively conducted,the filtration pressure were all 0.06 MPa and the filtration time were all 3 minutes.The maximum molecular water and the maximum capillary water of five iron concentrates were determined,and the Micromorphology of iron concentrates were observed by scanning electron microscopy.The results show that the order of five concentrates filter cake moisture from large to small is A,B,C,D and E,maximum molecular water and maximum capillary water of five concentrates are both in the same order,and those are closely related to the surface micro-morphology of five concentrates.The mineral particles which with more rough surface and adsorbed with more fine particles,the specific surface area and surface energy are larger,the maximum molecular water and maximum capillary water are larger.The strong capillary action increases the difficulty of capillary water removal,reduces the filtration rate,and leads to higher filter cake moisture.

关 键 词：矿粉微观形貌 最大分子水 最大毛细水 过滤速率 滤饼水分 

分 类 号：TD926[矿业工程—选矿]