Prasad Rakesh, Soren Shatrughan, Kumaraswamidhas L A, Pandey Chandan, Pan S K
Fuel, Minerals and Metallurgical Engineering Department, Indian Institute of Technology Dhanbad, Dhanbad 826004, India.
Mechanical Engineering Department, Hindustan College of Science & Technology, Mathura 281122, India.
Materials (Basel). 2022 Jun 14;15(12):4220. doi: 10.3390/ma15124220.
In India, during mining and ore processing, ore fine generation is a common phenomenon, in which more than 60% of process ore becomes discarded material. To explore the alternative of high-grade ores, mutual replacement with the utility of dump ore fines is the best way. With this perspective, Kiruburu iron ore mine (Iron Ore No.1) and Meghataburu iron ore mine (Iron Ore No.2) dumped fines were chosen for a Blaine no. investigation, in the connection of firing temperatures, to get optimum desirable physical properties, Cold Compression Strength (C.C.S.),and Apparent Porosity (A.P.), with physico-chemical properties, Reducibility Degradation Index (R.D.I.), and Reducibility Index (R.I.). To characterize pellet properties with input variables, a microstructure phase study has been conducted using a scanning electron microscope (S.E.M.), energy dispersive spectroscopy (EDS), and X-ray diffraction analysis (XRD). The Iron Ore No.1 and 2 fine pellets survey showed good, desirable properties, at the Blaine no., of 1678 cm/g and 2311 cm/g (corresponding to 200 mesh size), and the best results are attained at a firing temperature of 1300 °C. Thermal kinetic analysis of the heating of pellets has been done to knowthe activation energy of different ore characteristics. The results showed that Iron Ore No.2 pellets have high activation energy.
在印度，采矿和矿石加工过程中会产生大量矿粉，这是一种常见现象，其中超过60%的加工矿石会成为废弃物料。为探索高品位矿石的替代方案，利用废弃矿粉进行相互替代是最佳途径。基于此观点，选择了基鲁布鲁铁矿（1号铁矿石）和梅加塔布鲁铁矿（2号铁矿石）的废弃矿粉进行勃氏比表面积研究，研究与焙烧温度的关系，以获得理想的物理性能、冷压强度（C.C.S.）和显气孔率（A.P.），以及物理化学性能、还原度降解指数（R.D.I.）和还原指数（R.I.）。为用输入变量表征球团矿性能，使用扫描电子显微镜（S.E.M.）、能谱仪（EDS）和X射线衍射分析（XRD）进行了微观结构相研究。1号和2号铁矿石细球团矿的研究表明，在勃氏比表面积为1678 cm/g和2311 cm/g（对应200目粒度）时，具有良好的理想性能，在1300°C的焙烧温度下可获得最佳结果。对球团矿加热进行了热动力学分析，以了解不同矿石特性的活化能。结果表明，2号铁矿石球团矿具有较高的活化能。
