TY - JOUR
T1 - Enrichment of phosphorus from iron ore to dicalcium-silicate phase by partial reduction
AU - Maruoka, Nobuhiro
AU - Kubo, Hironari
N1 - Funding Information:
This work was supported by a Promotion Grant and the Network Joint Research Center for Materials and Devices, JSPS KAKENHI Grant Number JP20K05591, and Support Program of IMRAM. We would like to thank the members of the Ecotechnology Young Research Forum of the Division of Sustainable Systems in ISIJ and Professor Hiroshi Nogami of the Institute of Multidisciplinary Research for Advanced Materials, Tohoku University for their useful advice. We thank Akihisa Ito and Miho Hayasaka for their research support. We would like to thank Editage (www. editage.com) for English language editing.
Publisher Copyright:
© 2021 The Iron and Steel Institute of Japan.
PY - 2021
Y1 - 2021
N2 - Due to the low quality of available iron ore, it is necessary to develop a new technology to produce high quality steel from ore containing a high concentration of phosphorous. In this study, we propose a new process for producing low-P steel by concentrating P in the dicalcium silicate phase through a partial reduction process. High-P iron ore was mixed with varying quantities of CaO and graphite and heated at 1 573 K in an Ar atmosphere, and the obtained product was analyzed by electron probe microanalysis. It was found that in the reduced product mixture that was obtained under specific conditions of high basicity and a lower amount of added carbon, more than 95% of P was concentrated in the dicalcium silicate phase, and the P content in metallic iron was sufficiently low.
AB - Due to the low quality of available iron ore, it is necessary to develop a new technology to produce high quality steel from ore containing a high concentration of phosphorous. In this study, we propose a new process for producing low-P steel by concentrating P in the dicalcium silicate phase through a partial reduction process. High-P iron ore was mixed with varying quantities of CaO and graphite and heated at 1 573 K in an Ar atmosphere, and the obtained product was analyzed by electron probe microanalysis. It was found that in the reduced product mixture that was obtained under specific conditions of high basicity and a lower amount of added carbon, more than 95% of P was concentrated in the dicalcium silicate phase, and the P content in metallic iron was sufficiently low.
KW - Dicalcium silicate
KW - Ironmaking
KW - Low grade ore
KW - Phosphorous separation
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U2 - 10.2355/isijinternational.ISIJINT-2021-038
DO - 10.2355/isijinternational.ISIJINT-2021-038
M3 - Article
AN - SCOPUS:85113334286
VL - 61
SP - 2220
EP - 2226
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 8
ER -