Dense medium cyclones (DMCs) have become the workhorse of the coal preparation industry due to their high efficiency, large capacity, small footprint and low maintenance …

 — The stability of the medium as it passes through a dense medium cyclone (DMC) is clearly an important issue with regard to the separation capability and efficiency of the DMC. Stability in this art...

 — DMC monitoring and optimization based on immediate, precise partition curves from radio density tracers. By C.J. Wood and R.F. Wood. The South African diamond industry advanced the concept with the development of synthetic tracers in the 1970s (Napier-Munn, 1985).

 — "Reeves and Platt1 stated that dense medium separation is one of the most complex unit processes in mineral processing today particularly if cyclones are used. It is also the most efficient gravity concentrating process available to process engineers. The complexity of the process and large number of design and operating variables means …

 — Abstract: The dense medium cyclone (DMC) process used in coal beneficiation plants is studied from a control system perspective. Employing the dynamic model of the DMC process derived from mass flow balance, a model-based control strategy is proposed. The controller adjusts the density of medium used to enhance separation in …

 — The dense medium cyclone (DMC) is clearly the most important cleaning unit within coal preparation plants. Given the amount of coal being processed and the current prices, many billions of dollars ...

 — Dense medium cyclone (DMC) unit has been widely used to separate solid particles by density in industrial processes. The previous literature has well reported the general working principle of the DMC process (Wills, 1992; Wood, 1990).As schematically shown in Fig. 1, the feed, which contains a mixture of magnetite and raw coal, uses …

 — Dense medium cyclones are used extensively in the minerals processing industry around the world and cyclones with larger diameters have been introduced in …

Magnetite costs have become a significant operating expense with the prices ranging from $160-$300/ton. Magnetite loss ranges from 0.50 — 3.0 kg/tonne of feed (1 — 6 lb/ton) and will depend on: Fineness of the ... Dense Medium Cyclone Product: Obviously, if drainage only was used to recover the magnitude, a tremendous magnetite loss would ...

 — This paper reviews the literature on the influence of viscosity on separation in dense medium processes, for both baths and cyclones, in the context of the well-known fundamentals of particle motion in fluids. It is concluded that viscosity does play a role in determining both the separation density and the extent of separation inefficiency (Ep). …

 — Abstract. A mathematical model of the dense medium cyclone process has been developed by researchers at the JKMRC over a number of years. It has utilised empirical relationships between key performance criteria (such as cut point and Ep for the various size fractions) and cyclone geometry and operating parameters. This model is …

The advent of the large diameter, high capacity, very efficient dense medium cyclone was at hand. Essential ancilliaries. Together with dense medium separation comes a host of support equipment without which the DM cyclone or even the drum, cannot function. These relate to primary classification and desliming, washing and recovery of

This paper will briefly describe the impact that poor dense medium cyclone performance has on material with various levels of near density material and its economic impact.

The MULTOTEC dense medium cyclone has been successfully applied in, primarily, coal washing but also in hard rock beneficiation, specifically diamonds, iron ore and platinum, …

UNSW Sites

 — Dense medium cyclones are used extensively in the minerals processing industry around the world and cyclones with larger diameters have been introduced in recent years. Although cyclones have been in use for well over 60 years, the influence of the different process variables such as cyclone dimensions, feed pressure, medium …

 — The separation of fine coal has been widely discussed in the coal preparation industry due to its high economic potential. Dense medium cyclone (DMC) is the most efficient equipment available for fine coal separation. However, the industrial application of DMC is far from satisfactory due to operational difficulties and …

 — The modeling for dense medium cyclones was also involved. Finally, the future outlook is highlighted to advance the modeling of gas-particle separation dynamics in cyclone separators. Keywords:

 — The dense medium cyclone (DMC) is the most ubiquitous of the DMS vessels in use, and deservedly so. It is efficient (when run properly), can process both coarse and fine sizes, and has a relatively small footprint. Unlike other forms of gravity concentration, it also makes a positive separation at a desired density cut-point, due to …

Dense Medium Cyclones. Proven to improve efficiency across the world's toughest iron ore, platinum, diamonds and coal separation applications, Multotec manufactures a complete range of dense medium cyclones for …

 — Dense medium cyclone (DMC) is a high-tonnage device that is widely used to upgrade run-of-mine coal in coal preparation. It is simple in design but the flow pattern within it is complex due to the size and density distributions of the feed and process medium solids, and the turbulent vortex formed.

A number of dynamic separators have also been used over the years, but the unit that is most widely used is the dense medium cyclone. It was first patented in 1942 by the Dutch State Mines and is often referred to as the DSM cyclone. A drawing from the original patent (Driessen, Krijgsman, and Leeman, 1951) is ...

Semantic Scholar extracted view of "The monitoring of medium rheology in dense medium cyclone plants" by T. Napier-Munn et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 221,098,729 papers from all fields of science. Search ...

Dense medium separation (DMS) is a robust process that can be conducted at particle sizes as coarse as 300 mm and as fine as 500 μm with high separation efficiency, …

 — It is most directly related to dense medium cyclone performance; other operating variables influence the dense medium cyclone performance by changing the medium split ratio. At medium split ratios below one, the separation efficiency deteriorates drastically due to the short-circuiting of the feed. Increasing the medium split ratio …

The past years have witnessed a significant extension in state-of-the-art dense medium cyclone circuitry design. Dense medium cyclones are rapidly becoming a common choice for cleaning a much broader size range of …

Our ® dense-medium cyclone features the innovative laminar spiral inlet geometry design of the original ® hydrocyclone range, but it is cast in strong chrome white iron.. This enables the hydrocyclone to outperform in applications requiring heavy-media separation such as potash, coal, diamonds and hard rock.. Unlike some hydrocyclones …

Dense media separation (DMS) is a gravity separation method in which a suspension material such as magnetite or ferrosilicon is used to form a medium denser than water in separation. This method is used to separate valuable materials from waste. Multotec supplies a complete range of DMS processing equipment, which includes a …

 — A mathematical model is proposed to describe the multiphase flow in a dense-medium cyclone (DMC). In this model, the volume of fluid multiphase model is first used to determine the shape and position of the air core, and then the mixture multiphase model is employed to describe the flow of the dense medium (comprising finely ground …

"DENSE MEDIUM CYCLONE OPTIMIZATION" Project Period: December 14, 2000 – December 30, 2004 Principal Authors: Gerald H. Luttrell, Chris J. Barbee, Peter J. Bethell and Chris J. Wood Report Issue Date: June 30, 2005 DOE Award Number: DE-FC26-01NT41061 Participating Organizations: ia Tech Mining & Minerals Engineering …