Magnetic Separation of Phosphorus Enriched Phase from Multiphase Dephosphorization Slag
スポンサーリンク
概要
- 論文の詳細を見る
The authors have found that phosphorus exhibits remarkable segregation in exhausted actual hot-metal pretreatment slag (dephosphorization slag), and it exists as a 3CaO·P2O5–2CaO·SiO2 solid solution with the FeO–CaO–SiO2 matrix. Since their magnetic properties are significantly different, it is possible to separate them with the aid of a superconducting strong magnetic field. To investigate the effects of magnetic field strength, the particle size of the slag, etc., an experiment on magnetic separation has been carried out using simulated dephosphorization slag (18.1FetO–45.9CaO–20.3SiO2–6.6P2O5–2.5MnO–5.5MgO in mass%) and a superconducting magnet with 0.5–2.5 T. In a stronger magnetic field, the quality of the recovered slag becomes better due to less contamination of the FetO matrix phase, while its quantity worsens and the amount of recovered slag declines. However, the quantity of the recovered slag can be improved by repeating the procedure. In the present experiment, about 65% of the phosphorus enriched phase can be recovered with less than 10% of FetO matrix phase contamination at conditions of 0.5 T, a particle size of less than 35 μm, and a water/slag ratio of 32 with a single procedure. The P2O5 content in the recovered slag is close to that in the phosphorus-enriched phase in the initial slag, and the FeO content decreases markedly with magnetic separation.
- 社団法人 日本鉄鋼協会の論文
- 2010-01-15
著者
-
Kubo Hironari
Graduate School Of Environmental Studies Tohoku University
-
Matsubae Yokoyama
Graduate School Of Environmental Studies Tohoku University
-
Nagasaka Tetsuya
Graduate School Of Environmental Studies Tohoku University
-
Nagasaka Tetsuya
Graduate School Of Engineering Tohoku University
-
NAGASAKA Tetsuya
Graduate School of Engineering, Tohoku University
関連論文
- Phase Equilibria of Two-liquid CaO-MgO-Fe_tO-P_2O_5 Slag Saturated with (Mg, Fe)O
- Equilibrium Relation of Two Liquid CaO-MgO-Fe_tO-P_2O_5 Slag Phases Saturated with (Mg,Fe)O
- Phase Equilibria between SiO_2 and Iron-Chromite Spinel Structure Solid Solution, and Deoxidation of Liquid Fe-Cr Alloy with Silicon
- Thermodynamics of Oxygen in liquid Fe-Cr Alloy Saturated with FeO・Cr_2O_3 Solid Solution
- Dissolution behavior of environmentally regulated elements from steelmaking slag into seawater
- Dissolution behavior of nutrition elements from steelmaking slag into seawater
- Substance Flow Analysis of Manganese Associated with Iron and Steel Flow in Japan
- Substance Flow Analysis of Indium for Flat Panel Displays in Japan
- Material Flow Analysis of Aluminum Dross and Environmental Assessment for Its Recycling Process
- Substance Flow Analysis of Molybdenum Associated with Iron and Steel Flow in Japanese Economy
- Evaluation Method of Metal Resource Recyclability Based on Thermodynamic Analysis
- Equilibrium between Titanium and Oxygen in Liquid Fe-Ti Alloy Coexisted with Titanium Oxides at 1873K
- Surface Roughness of Solidified Mold Flux in Continuous Casting Process
- Substance Flow Analysis of Zinc Associated with Iron and Steel Cycle in Japan, and Environmental Assessment of EAF Dust Recycling Process
- New EAF Dust Treatment Process with the Aid of Strong Magnetic Field
- Impact of the Recovery of Secondary Ferrous Materials from Alternative ELV Treatment Methods on CO_2 Emission : A Waste Input Output Analysis
- Separation and Recovery of Phosphorus from Steelmaking Slags with the Aid of a Strong Magnetic Field
- Recycling Effects of Residual Slag after Magnetic Separation for Phosphorus Recovery from Hot Metal Dephosphorization Slag
- Magnetic Separation of Phosphorus Enriched Phase from Multiphase Dephosphorization Slag
- Waste Input-Output Analysis on "Landfill Mining Activity"
- Effect of Oxygen on the Evaporation Rate of Lead from Liquid Popper under Reduced Pressure
- New Activity Measurement Technique by Vacuum-Sealed Quartz Cell/Atomic Absorption Spectrophotometer Combination and Its Application to Liquid Bi-In Binary System
- Carbonization Behaviour of Woody Biomass and Resulting Metallurgical Coke Properties
- Desulfurization Technology in the Blast Furnace Raceway by MgO-SiO_2 Flux Injection
- Micro-structure Refinement in Low Carbon High Manganese Steels through Ti-Deoxidation, Characterization and Effect of Secondary Deoxidation Particles
- Identifying the Substance Flow of Metals Embedded in Japanese International Trade by Use of Waste Input-Output Material Flow Analysis (WIO-MFA) Model