利用铁尾矿制备多相复合材料的研究  

Preparation of Multiphase Material from Iron Tailings

作　　者：刘明[1] 徐利华[1] 邸云萍[1] 仉小猛[1] 郝洪顺[1] 

机构地区：[1]北京科技大学

出　　处：《金属矿山》2008年第7期144-147,共4页Metal Mine

基　　金：国家科技支撑计划项目(编号:2006BAB12B03-05;2006BAB2B04-05);国家自然科学基金项目(编号:50332010)

摘　　要：以攀枝花选钛尾矿为主要原料,活性炭为还原剂,采用碳热还原氮化法,实现合成与烧结一体化,烧结制备了Fe3Si-Ti(C,N)复合多相材料,探索了一条低成本利用尾矿合成复合多相材料的新途径。借助X射线衍射(XRD)、扫描电子显微镜(SEM)和能谱分析(EDS)对烧结体的物相、显微形貌及成分进行了分析,并对样品的力学性能进行了研究。XRD结果表明,产物主晶相为Fe3Si和Ti(C,N)。通过SEM和EDS可知,生成的Ti(C,N)相富集在Fe3Si相的周围。样品的体积密度和表面洛氏硬度随着温度的升高而升高。当合成温度为1500℃、保温时间为4h时,所得的烧结体具有较高的体积密度(ρ=4.331g/cm3)和表面洛氏硬度(HR15N=85.0)。Abstract Fe3 Si-Ti（C,N） muhiphase material was prepared from the iron tailings of titanium separation in Panzhihua Steel by using active carbon as the reductant and adopting carbothermic process and realizing an integration of synthesis and sintering, hereby exploring a new way to synthesize muhiphase material at low cost by using tailings. The phases, microstructure and composition of the sintered product were characterized by means of X ray diffraction （XRD）, scanning electron microscopy（SEM） and energy dispersive spectroscopy（EDS） and the mechanical property of the sample was also studied. XRD result indicates that the main crystal phases of the product are Fe3Si and Ti（C,N）. It is known from SEM and EDS results that the resultant Ti （ C, N） phase is enriched around Fe3 Si, The bulk density and superficial Rockwell hardness is increased with the temperature rise. When the temperature for synthesis is 1 500 ℃ and the holding time is 4 h,the resultant sintered product has a high bulk density（ p = 4. 331 g/cm^3 ） and high superficial Rockwell hardness （ HR15N = 85.0）

关 键 词：铁尾矿 Fe3Si—Ti(C N)多相材料 碳热还原氮化法 

分 类 号：TQ175[化学工程—硅酸盐工业] TB33[一般工业技术—材料科学与工程]