Dense medium coal preparation

In the medium with density greater than 1g/cm, coal preparation is carried out according to the size difference of particle density, which is called dense medium coal preparation or dense medium coal preparation. There are two kinds of heavy media used in coal preparation: heavy liquid and gravity flotation liquid. The main advantages of dense medium coal preparation are high separation efficiency compared with other coal preparation methods; The range of separation intensity is wide, the feed particle size of the separator is 1000-6mm, and the feed particle size of the cyclone is 80-0. 15mm, so the production control is easy to be automated. The disadvantages of dense medium coal preparation are complex production process, high production cost, rapid equipment wear and large maintenance.

Dense medium coal preparation is usually classified. Generally, lump coal is separated by a dense medium separator under the action of gravity; The separation of foamed coal is carried out with a dense medium cyclone under the action of centrifugal force.