Читать книгу Encyclopedia of Renewable Energy - James Speight G., James G. Speight - Страница 46

Advanced cycloning processes involve the separation of two species of different densities using a medium of an intermediate density to the two species. In the process, the heavy mineral matter component of the coal is separated from its lighter organic matter counterpart. Advanced cycloning technology seeks to extend the density-based separating principle to fine and ultrafine coal through the use of alternative media, such as heavy liquids and micronized magnetic, and through the application of centrifugal force to accelerate the separation process.

The dense medium is generally a suspension of fine, high-density particles (magnetite or sand) with the density of the medium varying directly with the solids concentration. The separating performance and downstream recovery of the dense medium suspension require that the difference in size between dense medium particles (magnetite) and coal particles be significant.

See also: Cyclone Separation, Gas Cleaning, Gas Processing, Gas Treating.