1 Medium density control for coal washing dense medium cyclone circuits Lijun Zhang, Xiaohua Xia, Jiangfeng Zhang Abstract—The dense medium cyclone (DMC) process used
A cyclone is the heart of the washing unit in a Heavy Media Washery. It is a non moving part and hence requires very low maintenance. However, the pressure at the inlet of the cyclone is a very important factor and it is suggested to maintain a minimum pressure of around D x 9 x 9.81 x density/100 (in bars), where D = the inner diameter of the ...
Dense medium separation is also used to upgrade the material to meet different market specifications, for example in coal and iron ore applications. A typical dense medium separation process for a diamond application is shown in Figure 1.
medium density is of the order of 1.45 and the cyclone cut point is of the order of 1.80. There are already a few plants in South Africa that have been built to wash run of mine coaJ at low yields and as reserves of h.igh yielding coal reduce. more will follow.
dense medium cyclone coal wash plant circuit; process of washing coal in dense medium cyclone plant. Posted at: used medium density coarse coal wash plants for
Dense medium cyclone (DMC) is one of the most important cleaning units in coal washery. It essentially separates coal particles in the light of their differences in density, and is capable of ...
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Dense medium cyclone is a kind of device which utilizes centrifugal force to separate materials according to specific gravity in the medium. The raw material to be treated is suspended in a very fine medium.
The primary advantages of using a dense medium cyclone arise when only a single stage separation is required allowing for a simpler circuit and reduced cost (i.e. the dense medium cyclone is generally less expensive).
The medium density at which the separation between more dense and less dense material occurs is called the cut point density. Invariably, there often is a percentage of the feed coal distribution which gets trapped in an envelope of zero velocity inside the cyclone where the centrifugal force equals the drag force.