Methods of vitrifying waste with low melting high lithia glass compositions

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873847

Jantzen, Carol M ^[1]; Pickett, John B ^[1]; Cicero-Herman, Connie A ^[1]; Marra, James C ^[1]

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1. Aiken, SC

The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts, typically from about 0.16 wt % to about 11 wt %, based on the total glass forming oxides. The lithia is typically included as a replacement for alkali oxide glass formers that would normally be present in a particular glass forming system. Replacement can occur on a mole percent or weight percent basis, and typically results in a composition wherein lithia forms about 10 wt % to about 100 wt % of the alkali oxide glass formers present in the composition. The present invention also relates to the high lithia glass compositions formed by these methods. The invention is useful for stabilization of numerous types of waste materials, including aqueous waste streams, sludge solids, mixtures of aqueous supernate and sludge solids, combinations of spent filter aids from waste water treatment and waste sludges, supernate alone, incinerator ash, incinerator offgas blowdown, or combinations thereof, geological mine tailings and sludges, asbestos, inorganic filter media, cement waste forms in need of remediation, spent or partially spent ion exchange resins or zeolites, contaminated soils, lead paint, etc. The decrease in melting point achieved by the present invention desirably prevents volatilization of hazardous or radioactive species during vitrification.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• DOE Contract Number: AC09-89SR18035
• Assignee: Westinghouse Savannah River Company ()
• Patent Number(s): US 6258994
• OSTI ID: 873847
• Country of Publication: United States
• Language: English

Related Subjects

methods
vitrifying
waste
melting
lithia
glass
compositions
relates
lowering
forming
systems
including
formers
composition
significant
amounts
typically
16
wt
11
based
total
oxides
included
replacement
alkali
oxide
normally
particular
occur
mole
percent
weight
basis
results
forms
10
100
formed
useful
stabilization
numerous
types
materials
aqueous
streams
sludge
solids
mixtures
supernate
combinations
spent
filter
aids
water
treatment
sludges
incinerator
ash
offgas
blowdown
geological
mine
tailings
asbestos
inorganic
media
cement
remediation
partially
exchange
resins
zeolites
contaminated
soils
lead
paint
etc
decrease
achieved
desirably
prevents
volatilization
hazardous
radioactive
species
vitrification
waste sludges
glass former
contaminated soils
oxide glass
alkali oxide
radioactive species
water treatment
contaminated soil
glass compositions
filter media
waste form
glass forming
partially spent
significant amounts
waste water
waste stream
exchange resin
waste material
weight percent
mole percent
waste materials
exchange resins
glass composition
waste streams
waste forms
glass formers
aqueous waste
vitrifying waste
particular glass
mine tailings
significant amount
spent filter
offgas blowdown
filter aids
incinerator ash
active species
lithia glass
forming oxides
forming composition
incinerator offgas
forming systems
including lithia
organic filter
lithia formers
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