Recovering Iron from Red Mud with High Gradient Magnetic Separator

2014 ◽  
Vol 644-650 ◽  
pp. 5447-5450
Author(s):  
Peng Xiang Zhang ◽  
Xing Long Zhou ◽  
Chang Cheng Shang Guan ◽  
Xu Bai
Keyword(s):  
Magnetic Field ◽  
Phase Analysis ◽  
Field Intensity ◽  
Red Mud ◽  
Magnetic Field Intensity ◽  
Magnetic Media ◽  
Element Analysis ◽  
Magnetic Separator ◽  
High Gradient ◽  
Iron Concentrate

Based on the XRF analysis of red mud, the Muti-element analysis of red mud and the phase analysis of iron, high gradient magnetic separators were used for recovering iron from red mud. Magnetic field intensity, magnetic media, velocity of flow and frequency were researched. Magnetic field intensity as 0.85T, Magnetic media as 2.0mm, velocity of flow as 8L/min and frequency of stroke as 200/min, at this condition, the grade of iron concentrate is 44.56% and the recovery is 73.69%.

Recovery a Refractory Oolitic Hematite by Magnetization Roasting and Magnetic Separation

2011 ◽  
Vol 361-363 ◽  
pp. 305-310 ◽  
Author(s):  
Chao Guo ◽  
Hui Wang ◽  
Jian Gang Fu ◽  
Kai Da Chen
Keyword(s):  
Magnetic Field ◽  
Magnetic Separation ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Reducing Agent ◽  
Iron Concentrate ◽  
Roasting Temperature ◽  
Iron Grade ◽  
Temperature Time ◽  
Iron Ore Concentrate

Orthogonal test was carried out to investigate effects of multiple factors during the magnetization roasting-magnetic separation process as follow: roasting temperature, time, ratio of reducing agent and magnetic field intensity. Significant order of those factors on grade of iron concentrate is obtained, and opportune condition for magnetic roasting is determined. As the condition that roasting temperature is 850°C, time is 40min, ratio of reducing agent is mcoal/more=12% and magnetic field intensity is 1800Gs, iron ore concentrate whose grade and recovery are 56.32% and 94.03%, respectively, is obtained. At last, through closed-circuit test including magnetization roasting, magnetic separation and reverse flotation, final result is obtained that iron concentrate with phosphorus and silicon are 0.18% and 2.63%, respectively, and its iron grade and recovery are 60.47% and 80.1%, respectively.

scholarly journals Magnetic scavenging of ultrafine hematite from itabirites

2013 ◽  
Vol 66 (4) ◽  
pp. 499-505 ◽  
Author(s):  
Maximiliano Batista da Silva ◽  
José Aurélio Medeiros da Luz
Keyword(s):  
Magnetic Field ◽  
Pilot Study ◽  
Magnetic Separation ◽  
Field Intensity ◽  
Mass Concentration ◽  
Mineral Resources ◽  
Mining Activities ◽  
Magnetic Separator ◽  
High Gradient ◽  
Quadrilátero Ferrífero

Magnetic separation has gained force with the advent of high gradient and field intensity continuous machines. A comparative pilot study was realized in order to magnetically recover hematite from a typical slime thickener underflow of a mill plant from Quadrilátero Ferrífero (Minas Gerais, Brazil). Two rotor (carrousel) high gradient magnetic separators (tagged as W1 and W2) and one vertical ring and pulsating high gradient magnetic separator (tagged as V) were tested. The best option was the machine W2 with field of 1.2 T, feed mass concentration of 35 %, and middlings flush water of 300 kPa. The more indicated for the cleaner step is the use of a magnetic field of 1.2 T, generating a concentrate with 5.48% of SiO2 and 62.75% of mass recovery. So, the relevance of this research also stems from the fact that it can subsidize other studies in order to face analogous problems in this context of intense mining activities in a region of such vast mineral resources.

scholarly journals Multi-point ground-based ULF magnetic field observations in Europe during seismic active periods in 2004 and 2005

2008 ◽  
Vol 8 (3) ◽  
pp. 501-507 ◽  
Author(s):  
G. Prattes ◽  
K. Schwingenschuh ◽  
H. U. Eichelberger ◽  
W. Magnes ◽  
M. Boudjada ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Intensity ◽  
Seismic Activity ◽  
Magnetic Field Intensity ◽  
Field Measurements ◽  
Fluxgate Magnetometer ◽  
Vertical Magnetic Field ◽  
Earthquake Epicenter ◽  
Electromagnetic Noise ◽  
Horizontal Magnetic Field

Abstract. We present the results of ground-based Ultra Low Frequency (ULF) magnetic field measurements observed from June to August 2004 during the Bovec earthquake on 12 July 2004. Further we give information about the seismic activity in the local observatory region for an extended time span 2004 and 2005. ULF magnetic field data are provided by the South European Geomagnetic Array (SEGMA) where the experience and heritage from the CHInese MAGnetometer (CHIMAG) fluxgate magnetometer comes to application. The intensities of the horizontal H and vertical Z magnetic field and the polarization ratio R of the vertical and horizontal magnetic field intensity are analyzed taking into consideration three SEGMA observatories located at different close distances and directions from the earthquake epicenter. We observed a significant increase of high polarization ratios during strong seismic activity at the observatory nearest to the Bovec earthquake epicenter. Apart from indirect ionospheric effects electromagnetic noise could be emitted in the lithosphere due to tectonic effects in the earthquake focus region causing anomalies of the vertical magnetic field intensity. Assuming that the measured vertical magnetic field intensities are of lithospheric origin, we roughly estimate the amplitude of electromagnetic noise in the Earths crust considering an average electrical conductivity of <σ>=10−3 S/m and a certain distance of the observatory to the earthquake epicenter.

Numerical Investigations on Rotatry Micropolar Fluid in Hydromagnetics Permeated with Suspended Particles Saturating Porous Medium

2021 ◽  
pp. 57-69
Author(s):  
Pushap Lata Sharma ◽  
Sumit Gupta
Keyword(s):  
Magnetic Field ◽  
Porous Medium ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Suspended Particles ◽  
Rotation Parameter ◽  
Wave Number ◽  
Stationary Convection ◽  
Micropolar Fluids ◽  
Medium Permeability

This paper deals with the convection of micropolar fluids heated and soluted from below in the presence of suspended particles (fine dust) and uniform vertical rotation and uniform vertical magnetic field in a porous medium. Using the Boussinesq approximation, the linearized stability theory and normal mode analysis, the exact solutions are obtained for the case of two free boundaries. It is found that the presence of the suspended particles number density, the rotation parameter, stable solute, magnetic field intensity and medium permeability bring oscillatory modes which were non–existent in their absence. It is found that the presence of coupling between thermal and micropolar effects, rotation parameter, solute parameter and suspended particles may introduce overstability in the system. Graphs have been plotted by giving numerical values to the parameters accounting for rotation parameter , magnetic field solute parameter, the dynamic microrotation viscosity and coefficient of angular viscosity to depict the stability characteristics, for both the cases of stationary convection and overstability. It is found that Rayleigh number for the case of overstability and stationary convection increases with increase in rotation parameter, as well as with magnetic field intensity, solute parameter and decreases with increase in micropolar coefficients and medium permeability, for a fixed wave number, implying thereby the stabilizing effect of rotation parameter, magnetic field intensity ,solute parameter and destabilizing effect of micropolar coefficients and medium permeability on the thermosolutal convection of micropolar fluids.

Tunable amplified spontaneous emission based on liquid magnetically responsive photonic crystals

2019 ◽  
Vol 7 (13) ◽  
pp. 3740-3743 ◽  
Author(s):  
Ying Li ◽  
Yue Long ◽  
Guoqiang Yang ◽  
Chen-Ho Tung ◽  
Kai Song
Keyword(s):  
Magnetic Field ◽  
Photonic Crystals ◽  
Spontaneous Emission ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Amplified Spontaneous Emission ◽  
The Magnetic Field

The wavelength of amplified spontaneous emission based on liquid magnetically responsive photonic crystals can be tuned by simply changing the magnetic field intensity.

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