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| Situation and prospect on production technology of direct reduction iron |
| SHEN Feng-man，JIANG Xin，GAO Qiang-jian，WEI Guo，ZHENG Hai-yan |
| （School of Metallurgy， Northeastern University， Shenyang 110819， Liaoning， China） |
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Abstract The international and domestic development on direct reduction iron （DRI） are investigated. Direct reduction process is an important part in iron and steel industry due to the coke-free， reduction of CO2 emission， and integrated utilization on resources. Moreover， the purer DRI is indispensable raw materials for clean steel production. Coal gasification followed by shaft furnace technology will be the main method for DRI production due to the progress of beneficiation technology， coal gasification technology， and increase in productivity of gas-based shaft furnace. In addition， a new direct reduction process named as PSH （paired straight hearth） is proposed， which should have good performances. Also， the process of rotary kiln and tunnel kiln can be developed in some area， but will not be the main process for DRI production.
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Received: 07 September 2016
Published: 13 January 2017
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2017, Vol. 52 
