Experimental Research of New Technology on the Precise Reduction of Micron-Sized Iron Oxide
This study puts forward the technology of the precise reduction of micron-sized iron oxide: at lower temperature (＜1000°C), the high purity metallic iron can be reduced, separated and extract from iron ore, slag, the iron oxide in the dust which are in micron size. Precise reduction experiments are planned for high phosphorus hematite in Enshi, magnetite in Kazuo and the steel dust of a factory, in order to do the study on their reduction characteristics. According to the L16 (215) orthogonal test on high phosphorus hematite and magnetite, the result shows that: in the atmosphere of pure H2 or 100% CO, the micron-grade mineral powder can be reduced at the condition of 650~850 °C; compared with the conventional particle size powder, the reduction temperature lowers about 300~350 °C in the same reduction degree. According to the L8 (27) orthogonal test on steel dust, the result shows that: by pure H2 or 100% CO, the average metallization rate can reach 95% at the temperature of 900~1000 °C; the product of reduction keeps power state and its interparticle sintering does not occur, which means that it is reasonable to separate iron from other impurity elements through the physical method in the non-melting state.
Daoguo Yang, Tianlong Gu, Huaiying Zhou, Jianmin Zeng and Zhengyi Jiang
S. Q. Li et al., "Experimental Research of New Technology on the Precise Reduction of Micron-Sized Iron Oxide", Advanced Materials Research, Vols. 201-203, pp. 1763-1769, 2011