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Analiza procesu ekstrakcji cząstek w magnetycznym separatorze wysokogradientowym

Cieśla Antoni, Skowron Mikołaj

Przegląd Elektrotechniczny

2020

R. 96, nr 4

98--101

Osadzanie cząstek mineralnych na elementach ferromagnetycznych separatora wysokogradientowego trwa do chwili uzyskania nasycenia, które określa równowaga sił uczestniczących w procesie ekstrakcji. Określenie stopnia nasycenia kolektorów matrycy jest ważne w pracy separatora HGMS. Model prezentowany w artykule zakłada równowagę sił działających na cząstkę w procesie ekstrakcji. Autorzy badają wpływ rozmiaru cząstek, indukcji magnetycznej, prędkości przepływu zawiesiny, rozmiaru matrycy na proces osadzania cząstek wyznaczając trajektorie cząstek.

The buildup of magnetic mineral particles on matrices (extraction of the particles from slurry) determines the saturated deposit volume of the minerals, which is of great importance for the operation of the high gradient magnetic separation (HGMS) system. The buildup of the fine weakly magnetic minerals on matrix is studied with the force equilibrium model. The model of particle buildup on one of the ferromagnetic collector matrix is presented. The influence of the particle size, the magnetic induction, the fluid viscosity, the fluid velocity and the matrix size on the saturated particle buildup is investigated and discussed.

Study on buildup of fine weakly magnetic minerals on matrices in high gradient magnetic separation

Zheng X., Wang Y., Lu D.

Physicochemical Problems of Mineral Processing

2017

Vol. 53, iss. 1

94--109

Buildup of magnetic mineral particles on matrices determines the saturated deposit volume of minerals, which is of great importance in the high gradient magnetic separation (HGMS) systems. In this paper buildup of fine weakly magnetic minerals on the matrix is studied with a force equilibrium model. Elaborate rules of particle buildup on the matrix are presented. An imaginary sector ring is used to approximately quantify the volume of saturated particle buildup. The influence of the particle size, magnetic induction, fluid viscosity and velocity as well as matrix size on saturated particle buildup is investigated and discussed. With the same matrix size, the saturated buildup volume decreases with the decrease of the particle size, applied magnetic induction and increase of the fluid viscosity and velocity. The saturated buildup volume normalized by the matrix volume, and the ratio of particle deposit volume to the matrix volume (Vd/Vm) decreases with the increase of the matrix size. Under the same matrices packing fraction, the total mineral deposit volume, when adopting small size matrices, is larger than that when adopting large size matrices. Only small size matrices can be used for recovery of minerals in size of several micrometers. Based on performed analyses, the ore feeding time in a cycle for a cyclic HGMS system and the rotation speed of the swivel for a continuous HGMS system under different circumstances are also discussed.