TY - JOUR
T1 - Removal of Phosphorus from High-phosphorus Iron Ore with Preliminary Reduction Treatment and Physical Concentration
AU - Kubo, Hironari
AU - Maruoka, Nobuhiro
AU - Sato, Yoshimasa
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP16K16213, an ISIJ Research Promotion Grant, and the Network Joint Research Center for Materials and Devices. The authors thank the members of the Slag to Urban Phosphate Ore Research Group in ISIJ.
Publisher Copyright:
© 2019 ISIJ.
PY - 2019/4
Y1 - 2019/4
N2 - Fundamental experiments were conducted with the aim of crude separation of the phosphorus contained in high-P iron ore prior to the ironmaking process. By reducing high-P iron ore with lime and graphite at an appropriate blending ratio and temperature, a reduction product was obtained consisting of a P-concentrated phase, metallic Fe with low P, and an Fe oxide-containing phase. The reduction product was pulverized by electrical pulse disintegration, and a magnetic separation experiment was performed for each particle group. As a result, 57.5% of the P contained in the reduction product was removed by removing particles of 250 μm or less. Samples simulating the constituent phases of the reduction products were synthesized and subjected to magnetization measurement. It was assumed that the Fe oxide-containing phase was paramagnetic and the P-concentrated phase was diamagnetic. We calculated the magnetic and drag forces acting on the paramagnetic particles in wet magnetic separation. When the magnetic field gradient was low, the magnetic forces acting on the fine particles were low, and attraction was difficult due to the drag force of water.
AB - Fundamental experiments were conducted with the aim of crude separation of the phosphorus contained in high-P iron ore prior to the ironmaking process. By reducing high-P iron ore with lime and graphite at an appropriate blending ratio and temperature, a reduction product was obtained consisting of a P-concentrated phase, metallic Fe with low P, and an Fe oxide-containing phase. The reduction product was pulverized by electrical pulse disintegration, and a magnetic separation experiment was performed for each particle group. As a result, 57.5% of the P contained in the reduction product was removed by removing particles of 250 μm or less. Samples simulating the constituent phases of the reduction products were synthesized and subjected to magnetization measurement. It was assumed that the Fe oxide-containing phase was paramagnetic and the P-concentrated phase was diamagnetic. We calculated the magnetic and drag forces acting on the paramagnetic particles in wet magnetic separation. When the magnetic field gradient was low, the magnetic forces acting on the fine particles were low, and attraction was difficult due to the drag force of water.
KW - Electrical pulse disintegration
KW - Iron ore
KW - Magnetic separation
KW - Phosphorus
KW - Reduction
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U2 - 10.2355/isijinternational.ISIJINT-2018-396
DO - 10.2355/isijinternational.ISIJINT-2018-396
M3 - Article
AN - SCOPUS:85065771077
VL - 59
SP - 697
EP - 702
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 4
ER -