Cement kiln dust treatment system and method
OwnerPeter D'Amico, Christopher Poling +1inventors
InventorsPeter D'Amico, Christopher Poling, Thomas Lesniak
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Abstract
A system and method for treating cement kiln dust is provided. The method includes the steps of receiving cement kiln dust (CKD) from a kiln; heating the collected CKD; forming a gas stream of vaporized metal and CKD by sufficient heating to separate at least one heavy metal from the collected CKD stream to create a cleaned CKD stream and a metal stream; providing a water soluble alkaline-earth metal polysulfide; combining the heavy metal stream with the water soluble alkaline-earth metal sulfide to create a combined stream; and removing at least a portion of one heavy metal from the combined stream.
Claims11
A method for treating cement kiln dust comprising at least one heavy metal, the method comprising:
- separating the heavy metal from the cement kiln dust to create a heavy-metal-containing stream;
- treating the heavy metal stream with a treating fluid containing at least one of an alkaline-earth metal sulfide and an alkaline-earth metal polysulfide;
- and
- removing at least a portion of the heavy metal from the stream.
A method of reclaiming a desired raw material from an industrial byproduct containing mercury, the method comprising:
- separating the mercury from the industrial byproduct by adding sufficient kinetic energy to the industrial waste to form a stream of separated mercury and a stream containing the desired raw material;
- treating the stream of separated mercury with a treating fluid containing at least one of an alkaline earth metal sulfide and an alkaline earth metal polysulfide to form a particulate containing the mercury;
- collecting the desired raw material separately from the particulate;
- and
- collecting the particulate for subsequent handling.
Dependencies are inferred from the claim text.