PL2576009 (T3)
Cement kiln dust treatment system and method
(22) 18.08.2011
(43) 31.07.2017
(57) Summary of the corresponding patent WO2012024511 (A1): A 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.
(73) Mercutek LLC (US)
