Shape effect of the matrix on the capture cross section of particles in high gradient magnetic separation

1976 ◽  
Vol 12 (5) ◽  
pp. 474-479 ◽  
Author(s):  
Z. Stekly ◽  
J. Minervini
Keyword(s):  
Magnetic Separation ◽  
Cross Section ◽  
Capture Cross Section ◽  
Shape Effect ◽  
Capture Cross ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
The Matrix

Particle capture of elliptic cross-section matrices for parallel stream high gradient magnetic separation

2016 ◽  
Vol 35 (1) ◽  
pp. 187-199 ◽  
Author(s):  
Xiayu Zheng ◽  
Yuhua Wang ◽  
Dongfang Lu
Keyword(s):  
Magnetic Field ◽  
Magnetic Separation ◽  
Cross Section ◽  
Capture Cross Section ◽  
Capture Cross ◽  
Particle Capture ◽  
High Gradient Magnetic Separation ◽  
Content Type ◽  
Parallel Stream ◽  
The Magnetic Field

Purpose – The purpose of this paper is to model the particle capture of elliptic magnetic matrices for parallel stream type high magnetic separation, which can be a guidance for the development of novel elliptic cylinder matrices for high-gradient magnetic separation (HGMS). Design/methodology/approach – The magnetic field distribution around the elliptic matrices is investigated quantitatively and the magnetic field and gradient were calculated. The motion equations of the magnetic particles around the matrices were derived and the particle capture cross-section of elliptic matrices was studied and was compared with that of the conventional circular matrices. Findings – Elliptic matrices can present larger particle capture cross-section than the conventional circular matrices and can be a kind of promising matrices to be applied to HGMS. Originality/value – There is little literature investigating the magnetic characteristics and the particle capture of the elliptic matrices in HGMS, the study is of great significance for the development of novel elliptic magnetic matrices in HGMS.

Vortex magnetic separation

1997 ◽  
Vol 211 (1) ◽  
pp. 31-42 ◽  
Author(s):  
J L S Watson ◽  
Z Li
Keyword(s):  
Magnetic Separation ◽  
Magnetic Particles ◽  
Effluent Treatment ◽  
Magnetic Fraction ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Downstream Side ◽  
The Matrix ◽  
Magnetic Product ◽  
The Wire

Vortex magnetic separation (VMS) is a new technique (1-3) which can not only greatly increase selectivity of high gradient magnetic separation but can also provide a much higher material throughput because high slurry velocity is used. This technique will have a wide range of applications in fields as diverse as mineral processing, biochemical engineering, sewage and wastewater treatment and industrial effluent treatment. At present in high gradient magnetic separation (HGMS) low Reynolds numbers (with respect to the wire diameter) are usually used and the magnetic product is captured on the upstream side of the wire matrix which results in a serious mechanical entrainment problem that is very detrimental to the purity of the magnetic fraction and to the reduction of the quantity of non-magnetic fraction (4). Vortex magnetic separation runs at moderate Reynolds number ( Re = 6–40) which leads to the formation of vortex flow in the neighbourhood of the matrix. Magnetic particles in the slurry are first concentrated in the boundary layer flow around the matrix and then brought into the magnetically attractive area on the matrix downstream side. The magnetic deposit on the downstream side of the matrix does not suffer the direct collisions with non-magnetic particles in the slurry, so the quality of the magnetic product is drastically improved. As will be described below, a new invention has been made with regard to the VMS matrix which allows capture to take place on both the upstream and downstream sides of the matrix without mechanical entrainment. This paper reviews experimental and theoretical work on the mechanisms involved in vortex magnetic separation.

Effect of Feed Solids on High Gradient Magnetic Separation of Cylindrical Magnetic Matrix

2014 ◽  
Vol 881-883 ◽  
pp. 1634-1637
Author(s):  
Ding Li ◽  
Lu Zheng Chen ◽  
Jian Xiong Huang ◽  
Jian Wu Zeng
Keyword(s):  
Magnetic Separation ◽  
Magnetic Particles ◽  
Decisive Role ◽  
Matrix Analysis ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Matrix Layer ◽  
The Matrix ◽  
Single Matrix ◽  
The Magnetic Field

Cylindrical magnetic medium (rod matrix) serves as the carrier for magnetic particles in pulsating high gradient magnetic separation (PHGMS), which has been widely applied to beneficiate hematite, ilmenite, limonite, siderite, wolframite, etc., in the mineral processing industry and to purify wastewater. The arrangement of rod elements in the matrix plays a decisive role in the magnetic field distribution and in the movement of particles in the matrix, thus generating a significant influence on the performance of PHGMS. The effect of feed solids on PHGMS is investigated in the 3 mm rod matrix of different spacings between rods in a single matrix layer, by Slice-Matrix Analysis; it was found that there is a maximum feed solids for a given matrix; beyond this feed solids, the performance of PHGMS deteriorates significantly.

Effect of Rod Arrangement in Matrix on High Gradient Magnetic Separation Performance

2013 ◽  
Vol 634-638 ◽  
pp. 3351-3354 ◽  
Author(s):  
Lu Zheng Chen ◽  
Guo Dong Xu ◽  
Shu Ming Wen ◽  
Si Qing Liu ◽  
Li Kun Gao
Keyword(s):  
Magnetic Separation ◽  
Magnetic Induction ◽  
Pilot Scale ◽  
Superior Performance ◽  
Separation Performance ◽  
Collision Efficiency ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Magnetic Elements ◽  
The Matrix

The effect of rod arrangement in a rod matrix on high gradient magnetic separation (HGMS) performance has been comparatively investigated through a cyclic pilot-scale centrifugal HGMS separator, with contiguously and orthogonally arranged rod matrixes respectively. The results of investigation indicate that the arrangement of rod elements in the matrix has a distinct effect on the HGMS performance, for relatively low magnetic inductions; beyond the threshold magnetic induction, the magnetic induction dominates that of the arrangement and the importance of the arrangement is significantly weakened even vanished. It was thus concluded that the combinatorial optimization for magnetic elements in the matrix improves the collision efficiency of particles with matrix, and gives a superior performance in a HGMS separator, at a lower energizing consumption.

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