CAJ | 학술논문

针对酒泉钢铁(集团)公司粒度小于0.30 mm的富含镜铁矿、褐铁矿和镁(锰)菱铁矿难选铁粉料,介绍采用闪速磁化焙烧动态试验装置开发我国难选低品位细粒级铁矿资源的试验效果;对闪速磁化焙烧前、后相关产品进行光学显微镜观察、XRD和EPMA检测分析,研究焙烧前后铁矿物的相变情况及微观特性.研究结果表明:在弱还原气氛和740～800 ℃条件下,通过60 s之内的闪速磁化焙烧处理,可获得铁品位为55.51%～55.35%的弱磁选铁精矿;弱磁性细粒铁矿物的相变均转变为龟裂较为发育的人造磁铁矿,产物中未见菱铁矿和强磁性的γ-Fe_2O_3;人造磁铁矿其镜下微观形貌与反光特征仍有差异,且由菱铁矿中的Mg和Mn特征元素含量有差别,可将其区分.
침대주천강철(집단)공사립도소우0.30 mm적부함경철광、갈철광화미(맹)릉철광난선철분료,개소채용섬속자화배소동태시험장치개발아국난선저품위세립급철광자원적시험효과;대섬속자화배소전、후상관산품진행광학현미경관찰、XRD화EPMA검측분석,연구배소전후철광물적상변정황급미관특성.연구결과표명:재약환원기분화740～800 ℃조건하,통과60 s지내적섬속자화배소처리,가획득철품위위55.51%～55.35%적약자선철정광;약자성세립철광물적상변균전변위구렬교위발육적인조자철광,산물중미견릉철광화강자성적γ-Fe_2O_3;인조자철광기경하미관형모여반광특정잉유차이,차유릉철광중적Mg화Mn특정원소함량유차별,가장기구분.
Applying flash magnetizing roasting (FMR) equipment to exploit fine-grained iron materials which was granularity minus 0.30 mm powder and rich in specularite, limonite and Mg-Mn siderite from Jiuquan Iron & Steel (Group) Co. Ltd (JISC) were briefly reviewed. The phase transformation and microstructure characteristics of iron minerals were investigated with optical microscopy, XRD and EPMA measurements after and before FMR samples. In a weakly reducing atmosphere and at 740-800 °C, JISC's refractory powder ferrous material (<0.30 mm) is subjected to FMR for less than 60 s. Weakly magnetic separation iron concentrate with iron grade of 55.51%—55.35% are obtained. Weakly magnetic iron minerals are mainly converted into strongly magnetic material Fe_3O_4 with many cracks and no Mg-Mn siderite and γ-Fe_2O_3 can be found in iron material after FMR. Their fractured micro-surface and reflection of iron minerals after FMR are different in optical microscopy. It is possible to distinguish artificial magnetite from iron minerals after FMR, according to the proportion of the specific elements contenting Mg or Mn in siderite and specularite.