Process for processing ash

Details Process for processing ash Process for processing ash

1996-07-26

1999-11-30

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

With separation or classification of material

241 791, B02C 1912

Patent

active

059927763

ABSTRACT:
An improved process for processing ash resulting from the mass burning of municipal waste includes a shear-force shredder for the size reduction of bulky items, impact cleaning of ferrous metal items, and a rotary washer for cleaning non-ferrous metals. Further improvements include sending the ash through an air separation unit to remove paper, wood, plastic and other unburned debris before providing ash to an eddy current separator for non-ferrous metal removal. The resultant ash which is essentially free of ferrous metals and non-ferrous metals, unburned material and unshreddables is then treated to immobilize certain heavy metals thus creating treated ash aggregate (TAA). Ash is recycled through a closed loop in the process to increase removal efficiency of metals and the homogeneous nature of the recovered (TAA).

REFERENCES:
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Tennessee Department of Environment and Conservation by Permit Rule for Recovery of Fe and NFe Metals.
Tennessee Department of Environment and Conservation by Permit Rule for Beneficial Reuse of MSW Ash.
Metro Health Department--Air Permit i. Construction Permit; ii. Temporary Operating Permit.
Tennessee Department of Environment and Conservation Wastewater Pump/Haul Permit.
American Ash Recycling Corporation--Brochure on Company.
Miscellaneous Documents Author: Jan M. Barnes, "A Process For Resolving Ash Issues", Solid Waste Technologies, Sep./Oct. 1995 v. 9 #5.
"The WES-PHix Process" (N.D.) Wheelabrator Environmental Systems, Inc.
Author: Michael L. Hedges, "New Technology Addresses Challenge of MSW Ash Disposal", Waste Dynamics of the Northeast, Sep. 1994.
Author: Richard W. Goodwin, "Defending the Character of Ash", Solid Waste 6 Power, Sep./Oct. 1992.
Author: Jonathan V. L. Kiser, "Recycling and WTE: Working Well Together" Reprint from Solid Waste 6 Power Industry Sourcebook 1993.
Author: Warren H. Chesner, "Working Towards Beneficial Use of Waste Combustor Ash", Solid Waste and Power, Sep./Oct. 1993.

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