Beneficiating kiln dusts utilized in pozzolanic reactions
AssigneeN-Viro Energy Systems Ltd.
InventorsWilliam A. Kneller, John P. Nicholson
Life of this patent
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Abstract
The method of beneficiating kiln dusts which has insufficient reactive properties to produce desired pozzolanic reactions which method comprises adding small amounts of a material selected from the group consisting of CaO, calcium hydroxide and sodium hydroxide. The beneficiated dusts can be utilized with fly ash or fly ash and a filler to produce pozzolanic reactions and provide a durable mass.
Claims21
A mixture consisting essentially of pozzolan, kiln dust, a filler, and a small amount of material selected from the group comprising calcium oxide, calcium hydroxide, and sodium hydroxide, which through pozzolanic reactions produces a durable mass, the pozzolan comprising between about 6 and 24% by dry weight, the kiln dust comprising between 4 and 16% by dry weight, the filler comprising between about 60 to 90% by dry weight, the material selected from the group consisting of less than 1.5% by dry weight, of calcium oxide, of less than 2.0% by dry weight, of calcium oxide, of less than 2.0% by dry weight of calcium hydroxide, and less than 1% by weight of sodium hydroxide.
The method of making a durable mass which comprises mixing kiln dust, pozzolan, a filler, and a material selected from the group consisting of calcium oxide, calcium hydroxide, and sodium hydroxide, and water, and permitting the mixture to react at ambient temperatures to produce a durable mass the pozzolan comprising between about 6 and 24% by dry weight, the kiln dust comprising between 4 and 16% by dry weight, the filler comprising between about 60 and 90% by dry weight, the material selected from the group consisting of less than 1.5% by dry weight, of calcium oxide, of less than 2.0% by dry weight of calcium hydroxide, and less than 1% by weight of sodium hydroxide.
The method of making a durable mass which comprises
- conditioning kiln dust by adding water,
- storing the kiln dust,
- and thereafter mixing the kiln dust, pozzolan, a filler, and a material selected from the group consisting of calcium oxide, calcium hydroxide and sodium hydroxide, and water, and permitting the mixture to react to ambient temperatures to produce a hard, strong, durable mass, the pozzolan comprising between about 6 and 2.4% by dry weight, the kiln dust comprising between 4 and 16% by dry weight, the filer comprising between about 60 to 90% by dry weight, the material selected from the group consisting of less than 1.5% by dry weight, of calcium oxide, of less than 2.0% by dry weight of calcium hydroxide, and less than 1% by weight of sodium hydroxide.
Dependencies are inferred from the claim text.