关键词: 高纯铁精矿, 还原铁粉, 固体碳粗还原&mdash, 氢气精还原工艺

Abstract: The preparation of reduction iron powder by conventional process of solid carbon primary reduction-hydrogen fine reduction was investigated with highly pure iron concentrate obtained in the beneficiation test on Huangyandong iron ore from Licheng, Shanxi as raw material.The results show that fine quality reduction iron powder with chemical composition (except acid non-soluble substance) and process performance that are near to those of NC100.24  iron powder, Sweden Hoganas's brand, and of FHY100.25 iron powder of national Class A grade can be prepared with anthracite produced near Licheng and slime produced in Licheng as reducer and desulfurizer, at a reducer dosage of 1.5 times that of concentrate amount, desulfurizer dosage of 14% that of reducer, a reduction temperature of 1 200 ℃ for 3.5 h, charging bucket's discharging temperature of 400 ℃ for primary reduction, H₂ reduction of primarily reduced iron powder at a temperature of 850 ℃ for 2.5 h.

Key words: Highly pure iron concentrate, Reduction iron powder, Reduction process of solid carbon primary reduction-hydrogen fine reduction