Production of Grain Refiners for Steel from Ilmenite Ore
The reduction and nitridation of preoxidized ilmenite pellets were investigated with the prospect of creating grain refiners containing titanium oxides and titanium nitride dispersoids. All the reduction and nitridation reactions were conducted in a furnace with a thermogravimetric analysis system under a H2-N2 gas mixture of 5 L/min. The ilmenite pellets were reduced at 1100℃ for 4 hours under 80%H2-20%N2 gas mixture, and then respectively nitrided at 700℃, 800℃, 900℃ and 1000℃for 12 hours under 10%H2-90%N2 gas mixture. The products were characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), and analyzed by Energy Dispersive Spectrometers (EDS) and Electron Probe Mapping Analysis (EPMA). Iron oxides were reduced into metallic iron, and oxides of titanium were found, but titanium nitride particles were not identified in the products under the prevailing conditions.
Ilmenite Nitridation Grain refiner
D. J. Zhao L. Kolbeinsen C. van der Eijk G. M. Tranell
Department of Materials Science and Engineering, Norwegian University of Science and Technology, Tro SINTEF Materials and Chemistry, Trondheim, Norway
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3291-3297
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）