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PMET TECHNOLOGIES

As part of our "Above Ground Mining" program for identifying and recovering values from industrial wastes and by-products, PMET has combined its Integrated Materials Analysis, Process Development, Pilot Plant Design and Operations skills to develop practical, economically viable technologies in the areas of coal ash utilization and heavy metal removal and recovery from soils and industrial wastes.



COAL ASH UTILIZATION TECHNOLOGIES

PMET has developed three new commercially available processes that increase the market for, and value of, ash produced at coal-burning power plants. These processes, when combined with PMET's new Carbon Upgrade Technology, offer the potential of converting up to 100% of the ash generated at a site to high quality commercial products and eliminating the cost and liability of landfill disposal.
 
For further information on ash utilization activities in the United States please visit the American Coal Ash Association web site at www.acaa-usa.org.



FLY-ASH/CARBON SEPARATION TECHNOLOGIES

PMET's Fly-Ash/Carbon Separation technologies include two distinct commercially demonstrated processes for the removal of carbon from coal combustion fly ash that yield a low-carbon ash suitable for use as a substitute for Portland Cement in concrete and in other applications requiring a quality pozzolanic material. These processes, one based upon jet mill and mechanical comminution and the other upon mechanical separation, share the advantages of:

  • HIGH THROUGHPUT

  • LOW COST

  • ONE-STEP PROCESSING

  • COMMERCIALLY AVAILABLE EQUIPMENT

  • LOW-CARBON PRODUCT


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MANUFACTURE OF SHAPED BUILDING PRODUCTS FROM ASH

PMET's patented Brixx © technology for the manufacture of shaped building products from coal combustion ash has been demonstrated to produce high quality structural products including brick, block, and paving stone in a variety of sizes shapes and colors. This process:


  • RECYCLES BOTH FLY ASH AND BOTTOM ASH

  • CAN USE HIGH-CARBON ASH

  • USES STANDARD EQUIPMENT

  • PRODUCES HIGH STRENGTH, HIGH QUALITY PRODUCTS IN A VARIETY OF SHAPES AND COLORS

  • REDUCES CONSTRUCTION COST

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CARBON UPGRADE TECHNOLOGY

PMET's Carbon Upgrade Technology is designed to further purify the carbon-rich fraction recovered from the Fly-Ash/Carbon Separation process to yield an enhanced-purity carbon suitable for use as a metallurgical carbon, an adsorbent, a fuel supplement, and in other applications in which it offers cost savings relative to primary carbon products. This technology:

  • REDUCES END-USER COST

  • YIELDS A HIGH MARGIN CARBON PRODUCT

  • PRODUCES A FINE, PREMIUM POZZOLANIC SILICEOUS ASH

  • IMPROVES THE PROFITABILITY OF ASH RECYCLING


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HEAVY METAL REMOVAL/RECOVERY TECHNOLOGIES

In response to the growing need for safe, reliable, cost-effective methods for removing heavy metal contaminants from soils and industrial wastes, PMET has developed two economical processes for recovering and recycling two of the most widely dispersed contaminants, mercury and lead. Both processes have consistently proven to be cost-effective means of reducing contamination well below specified levels and recovering salable, recyclable products.



MERCURY REMOVAL/RECOVERY TECHNOLOGY

PMET's Mercury Removal/Recovery Process, a medium-temperature thermal desorption process, has been used in the United States, United Kingdom, and Germany to remove, recover, and recycle mercury from contaminated soils and industrial wastes. This process, which consistently reduces mercury levels in treated materials to less than 1 part per million (<1 ppm) and recovers 99% pure metallic mercury, has been:

  • Designated Best Demonstrated Available Technology (BDAT) by the U.S. Environmental Protection Agency.

  • Awarded the prestigious R&D 100 Award by R&D Magazine

  • Awarded the Three Rivers Environmental Excellence Award

  • Named in special Forbes Magazine supplement as "one of the 25 top new environmental technologies"


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LEAD REMOVAL/RECOVERY TECHNOLOGY

PMET's Lead Removal/Recovery Process, is a combination hydrometallurgical and physical separation process that recovers lead from hazardous wastes such as soils, spent blasting abrasives, foundry sands, and other forms of granular industrial wastes. This process has been shown to:
  • render the treated product non-hazardous and reusable

  • reduce residual lead levels to less than 100 ppm

  • remove and recover lead and lead compounds without altering the structure of the reusable product


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