The effect of magnetic field on the performance of a dense medium separator

被引：2

作者：

Vatta, Laura L. ^{[1
]}

Kekana, Richard ^{[1
]}

Radebe, Bongani ^{[1
]}

Myburgh, I. ^{[2
]}

Svoboda, J. ^{[1
]}

机构：

[1] TSS Technology, De Beers Consolidated Mines Ltd., P.O. Box 82851, Southdale, 2135, Johannesburg, South Africa

[2] Namaqualand Mines, De Beers Consolidated Mines Ltd., Private Bag X01, Kleinzee, 8282, South Africa

来源：

Physical Separation in Science and Engineering | 2003年 / 12卷 / 03期

关键词：

Degradation - Flow patterns - Gravitational effects - Magnetic separation - Magnetic separators - Particle size analysis - Quartz - Solenoids;

D O I：

10.1155/PSSE.12.167

中图分类号：

学科分类号：

摘要：

The application of a vertically oriented magnetic field external to a dense medium cyclone can be used to manipulate the density differential within the cyclone by influencing the cyclone's internal ferrosilicon distribution. Tests were conducted on a well-defined dense medium system using a pilot-plant cyclone equipped with a solenoid magnet. The objective was to determine the yield to the dense medium cyclone underflow of a sample consisting predominantly of quartzite material, as a function of the magnetic field strength of the solenoid magnet, and as a function of solenoid position. It was observed that for a specific selection of magnetic field strength and solenoid position, the concentrate yield was reduced. A decrease in yield to concentrate is advantageous in that it reduces the mass of material to be processed downstream. The yield reduction was found to be a function of the applied magnetic field strength. Furthermore, it was found that a disruption in the ferrosilicon flow pattern inside the cyclone may occur beyond a certain magnetic field strength which leads to impaired cyclone operation.

引用

页码：167 / 178