超细粒级钒钛磁铁精矿烧结规律研究  

Research on sintering law of ultra-fine grade V-Ti magnetite concentrate

作　　者：胡鹏[1] Hu Peng(Pangang Group Research Institute Co.,Ltd.,Panzhihua 617000,Sichuan)

机构地区：[1]攀钢集团研究院有限公司,四川攀枝花617000

出　　处：《烧结球团》2020年第4期6-11,共6页Sintering and Pelletizing

摘　　要：为找出攀钢自产钒钛铁精矿提质后的烧结规律,对超细粒级钒钛磁铁精矿原料性能、单烧以及替代现有钒钛精矿进行试验研究。结果表明:钒钛精矿经过超细磨选后,TFe质量分数提高8%,-0.074 mm粒级占比达到96%以上,主要物相组成为钛磁铁矿和钛铁矿;此种精矿大量配入烧结后,由于超细颗粒自黏附成核改善了混合料制粒性能,提高了烧结矿的成品率和烧结机利用系数,但由于自成核内熔剂占比低以及烧结速度加快,影响了矿物液相生成量和结晶程度,从而导致烧结矿的转鼓强度明显降低。In order to find out the sintering law of self-produced improved V-Ti magnetite concentrate,the raw material properties,single firing test and substitution of existing V-Ti concentrate of ultra-fine grade V-Ti magnetite concentrate are studied.The results show that TFe content is increased by 8%,the-0.074 mm part is over 96%,and the main phase composition is composed by titanomagnetite and ilmenite,after ultra-fine grinding and separation of V-Ti concentrate.After this kind of concentrate is mixed into the sintering in large quantities,the granulation performance of the mixture is improved,while the yield and productivity of the sinter are increased due to the self-adhering nucleation of ultrafine particles.However,due to the low content of solvent in the self-nucleation and the acceleration of sintering speed,the amount of liquid phase formation and the degree of crystallization of the mineral are affected,resulting in the obvious reduction of the tumbler strength of the sinter.

关 键 词：超细粒级 钒钛磁铁精矿 烧结 转鼓强度 

分 类 号：TF046.4[冶金工程—冶金物理化学]