Method and apparatus for recycling cement kiln dust
AssigneeSouthern Ionica Incorporated
InventorsJoe C. Steelhammer, Clayton W. Hackett, Milton O. Sundbeck, Jr., John E. Coleman
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Abstract
Methods for recycling cement kiln dust are described and involve heating a mixture containing at least one additive, water, and cement kiln dust for a sufficient time and at sufficient temperatures to form cement clinker. The additive contains an organic polyacid, a hydroxy carboxylic acid, a polycarboxylic acid, a saccharide, a carbohydrate, a salt thereof, or combinations thereof. A cement slurry containing water, cement kiln dust, and the above-described additive is also described as well as apparatus for recycling the cement kiln dust.
Claims33
A method for recycling cement kiln dust comprising heating a mixture comprising at least one additive, water, and cement kiln dust for a sufficient time and at sufficient temperatures to form cement clinker, wherein said additive comprises an organic polyacid, a hydroxy or polyhydroxy carboxylic acid, a polycarboxylic acid, a saccharide, a carbohydrate, a salt thereof, or combinations thereof.
A method for recycling cement kiln dust comprising:
- recovering cement kiln dust;
- blending said cement kiln dust with water and at least one additive to form a slurry;
- feeding said slurry into a kiln;
- heating said slurry for a sufficient time and at sufficient temperatures to form cement clinker, wherein said additive comprises an organic polyacid, a hydroxy carboxylic acid,
- a polycarboxylic acid, a saccharide, a carbohydrate, a salt thereof, or combinations thereof.
A cement slurry comprising water, cement kiln dust, and at least one additive comprising an organic polyacid, a hydroxy carboxylic acid, a polycarboxylic acid, a saccharide, a carbohydrate, a salt thereof, or combinations thereof.
Dependencies are inferred from the claim text.