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US4472198A Expired / Lapsed US ⏱️ 0.0 years remaining

Process and system of wasting fly ash and product produced thereby

Assignee: AMERICAN FLY ASH COMPANY A CORP OF IL
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Filing: 1982-01-29
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Granted: 1984-09-18
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Expires: 2002-01-29
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Abstract

Abstract A method and system for disposing of fly ash together with water or liquid industrial waste, and the product produced thereby, in an environmentally acceptable manner which includes combining dry fly ash with a liquid additive in an amount of about 5%-25% of weight of liquid additive to weight of fly ash in a mixing operation which closely controls the liquid additive to yield a uniformly conditioned product which can be subjected to earth handling equipment pressures immediately and which eliminates cell preparation and greatly reduces leaching at the disposal site.

Inventors

  • 👤 Mitchell L. Nowicki
  • 👤 Alan R. Dunbar
  • 👤 Joseph H. Pound

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 06:54
CPC Classifications
B; B09; B09B; B09B3/00; B09B3/20; B09B3/25; B09B1/00; Y; Y10; Y10S; Y10S106/00; Y10S106/01

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 192 words
In a method of waste disposal the steps of storing fly ash after its formation in a dry condition in a first storage location; conveying the fly ash in a dry condition from said first storage location in a closed chamber transport vessel, such that the fly ash is precluded from contacting the ambient atmosphere during transit, to a second, processing location; storing the fly ash in a closed vessel at said second location, such that the fly ash is precluded from contacting the ambient atmosphere during storage; forming a conditioned soil-like product consisting of an intimate mixture of fly ash and a liquid at said second location, said conditioned product forming step comprising a period of mixing exceeding one minute, said conditioned, soil-like product having a liquid content of from no less than about 5% to no more than about 20% by weight, depositing the conditioned, soil-like product into a disposal site, which is exposed to ambient environmental conditions, by conventional, mechanical earth-moving means, spreading and compacting the conditioned, soil-like product by conventional earth-moving means, and hardening the conditioned, soil-like compacted product while said product is exposed to ambient environmental conditions.
Claim 2
Dependent Claim 192 words
In a method of waste disposal the steps of storing fly ash after its formation in a dry condition in a first storage location; conveying the fly ash in a dry condition from said first storage location in a closed chamber transport vessel, such that the fly ash is precluded from contacting the ambient atmosphere during transit, to a second, processing location; storing the fly ash in a closed vessel at said second location, such that the fly ash is precluded from contacting the ambient atmosphere during storage; forming a conditioned soil-like product consisting of an intimate mixture of fly ash and a liquid at said second location, said conditioned product forming step comprising a period of mixing exceeding one minute, said conditioned, soil-like product having a liquid content of from no less than about 5% to no more than about 20% by weight, depositing the conditioned, soil-like product into a disposal site, which is exposed to ambient environmental conditions, by conventional, mechanical earth-moving means, spreading and compacting the conditioned, soil-like product by conventional earth-moving means, and hardening the conditioned, soil-like compacted product while said product is exposed to ambient environmental conditions.
Claim 3
Dependent Claim 30 words
The method of claim 1 further characterized in that the conditioned product has an unconfined bearing pressure of at least one ton per square foot in an as made condition.
Claim 4
Dependent Claim 30 words
The method of claim 1 further characterized in that the conditioned product has a permeability of at least 10 -5 following curing for seven days under standard conditions of use.
Claim 5
Dependent Claim 13 words
The method of claim 1 further characterized in that the liquid is water.
Claim 6
Dependent Claim 16 words
The method of claim 1 further characterized in that the liquid is an industrial liquid waste.

References Cited (Backward Citations)

US4313762A Cited
US4226630A Cited
US4226630B1 Cited
US4354876A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-09-18 1988-03-19 1988-09-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-09-18 1992-03-19 1992-09-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-09-18 1996-03-19 1996-09-18 $7700.00 Window Closed / Lapsed

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