Facility for melting residues from municipal waste combustion : design criteria and description of equipment
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Facility for melting residues from municipal waste combustion : design criteria and description of equipment

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      "The U.S. Bureau of Mines, under a Memorandum of Agreement with the American Society of Mechanical Engineers (ASME), established design criteria for a facility to melt residues from municipal waste combustion. The facility, which is available to potential users on a cost-sharing basis, is also applicable to a variety of inorganic waste materials from smelting or melting operations. The design consists of a mechanical feed handling system, electric arc melting furnace, fume-offgas handling system, and thermal oxidizer for final offgas treatment. Screw conveyors and a bucket elevator deliver up to 2,000 lb/h of minus 1-in material to a three-phase electric arc melting furnace. This unique 800-kV. A furnace has a water-cooled shell and roof to minimize interaction of the melt with the refractory lining. The volume of the hearth below the slag taphole is approximately 1.2 st of steel. The furnace is sealed, allowing atmosphere control within the furnace and fume duct by nitrogen or inert gas injection. A jetpulsed baghouse removes particulate from the offgas and serves as an acid gas scrubber. The clean offgas is heated to 1,8000 F for 1 s in a propane-fired thermal oxidizer before being vented to the atmosphere." - NIOSHTIC-2

      NIOSHTIC no. 10004316

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