Processed wastes as supplemental fuel for modified cement films
AssigneesCadence Chemical Resources, Inc., Ash Grove Cement Company
InventorsMichel R. Benoit, Eric R. Hansen, Theodore J. Reese
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Abstract
A method is described for environmentally sound usage of combustible hazardous waste in an operating rotary kiln. The method is particularly adapted for disposal of solid hazardous wastes, optionally in the form of a blended waste homogenate, packaged in sealable containers. The containers are used as fuel modules and charged into a rotary kiln cylinder where kiln gas temperatures range from about 950.degree. to about 1200.degree. C. to achieve high destruction and removal efficiencies.
Claims11
A method for achieving environmentally sound disposal of solid waste having volatile components in an operating rotary cement kiln comprising a heated, rotating cylinder containing in-process mineral material, said method comprising the steps of processing said waste to retard the release of its volatile components and charging the processed waste into the kiln to contact the mineral material at a point along the length of the kiln cylinder where the kiln gas temperature is sufficient to decompose the volatile components of the waste.
A long wet or dry process cement kiln comprising rotary cylinder for containing and heat processing a mineral material to form cement clinker, said kiln modified for the environmentally sound use of combustible solid wastes having volatile components as supplement fuel for the energy efficient production of cement clinker, said modified cement kiln further comprising a solid waste delivery port in the rotary cylinder, said port located at a point along the axial length of the cylinder where during kiln operation the kiln gas temperature is sufficient to decompose the volatile components of the solid waste.
Dependencies are inferred from the claim text.