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| Study on direct reduction of iron ore powder at low temperature |
| BAI Chenchen1，YANG Guangqing1，WU Longfei1，MA Baoliang2 |
| （1. College of Metallurgy and Energy, North China University Science and Technology, tangshan 063210, China；
2. Xingtai Iron and Steel Corp., Ltd, Xingtai 054027, China） |
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Abstract The main ironmaking processes in China are blast furnace ironmaking and smelting reduction, both of
which are high temperature metallurgical processes with high energy consumption, while the gas-based reduction
method with low smelting temperature is difficult to develop due to the limitation of domestic natural gas resourc‐
es. The coal-based direct reduction method develops slowly due to high energy consumption and low productivity.
In order to reduce its energy consumption and reduction cost, in this paper, the reduction mechanism between
different iron ore powder and coal powder is studied by differential thermal analysis experiment. Through the dif‐
ferential thermal analysis of coal powder with different proportions of iron ore powder, the best method of direct
reduction temperature of iron ore powder is expected to be found. The results show that PB powder ore relative to
vanadium and titanium iron ore reduction process in the consumption of coal powder less coal ratio is lower, but
the maximum heat absorption is slightly higher than the two vanadium and titanium iron ore powder. When PB
powder and anthracite are selected, and the ratio of carbon to oxygen is 1.25, namely, the carbon content is 24.45%
of the mass of iron ore powder, the reaction temperature of iron ore powder reduction is the lowest. At this time, the
initial reaction temperature is 1 025 °C, and the violent reaction temperature is 1 210 °C.
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Received: 23 March 2023
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Corresponding Authors:
杨广庆 （1983—）， 男， 博士， 副教授， 主要研究方向为高炉炼铁新技术。
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2024, Vol. 34 
