DHS Coal Preparation Technology
GreenFields Coal Company is committed to the further development of economically-responsible coal refinement processes and techniques to ensure coal as a valuable and plentiful global energy source for many years to come.
As such, Greenfields' DHS (Differential Hardness Separation) system is a revolutionary coal processing plant that can reduce sulfur and ash levels while decreasing moisture to a level below 1%. The DHS plant is a Dry System (Waterless), is Emission Free, Chemical Free and produces virtually No Waste as all by-products can be marketed.
Environmental Benefits
- The DHS Process is Waterless- GreenFields does not use water to separate coal from its impurities; this means that slurry impoundments and streams of water-laden sludge are eliminated.
- The DHS Process is Emission Free- Our process captures solids that report to the coal products, not to the surrounding environment. This equates to a virtual zero emission process and the elimination of virtually all water in the coal.
- The DHS Process is Chemical Free- We separate coal based upon particle size, particle specific gravity, and particle bulk density without the use of chemicals currently employed in alternative wet processes for both run of mine and residual coal recovery processes.
- The DHS Process Reduces Energy Consumption- GreenFields uses an efficient combination of heat and air for the initial coal-drying phase as compared to traditional coal technologies with a higher emphasis on use of heat alone. This translates to an additional energy savings.
- The DHS Process Reduces Solid Waste- Many industries, such as cement and concrete production, seek the resulting dry, fine raw materials as value-added components. GreenFields Coal is committed to working with these industries to define and leverage these opportunities, turning waste into usable material, with a goal of “zero” residual waste on every project site. Products recovered from coal recovery sites qualify for “green” credits, such as those issued by the U.S. Green Building Council’s LEED Certification Program.
The DHS Process
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