| US 7,488,172 B2 | ||
| Methods of mixing high temperature gases in mineral processing kilns | ||
| Eric R. Hansen, Shawnee, Kans. (US); Ralph A. Supelak, Strongsville, Ohio (US); and James R. Tutt, Texarkana, Tex. (US) | ||
| Assigned to Cadence Environmental Energy, Inc., Michigan City, Ind. (US); and Ash Grove Cement Company, Overland Park, Kans. (US) | ||
| Filed on May 07, 2007, as Appl. No. 11/745,277. | ||
| Application 11/745277 is a continuation of application No. 11/137288, filed on May 25, 2005, granted, now 7,229,281. | ||
| Application 11/137288 is a continuation in part of application No. 10/719423, filed on Nov. 21, 2003. | ||
| Application 10/719423 is a continuation of application No. 09/951164, filed on Sep. 11, 2001, granted, now 6,672,865, filed on Jan. 06, 2004. | ||
| Claims priority of provisional application 60/231663, filed on Sep. 11, 2000. | ||
| Claims priority of provisional application 60/251129, filed on Dec. 04, 2000. | ||
| Claims priority of provisional application 60/276355, filed on Mar. 16, 2001. | ||
| Prior Publication US 2007/0207432 A1, Sep. 06, 2007 | ||
| Int. Cl. F27B 7/36 (2006.01) | ||
| U.S. Cl. 432—113 [432/117] | 24 Claims |
| 1. A mineral processing kiln, comprising:
an inclined rotary vessel having a lower end and an upper end,
a preheater/precalciner positioned proximate to the upper end of the rotary vessel, the preheater/precalciner including (i)
a stationary vessel, and (ii) an injector which is operable to introduce a quantity of high pressure air at a pressure of
about 2 psi to about 100 psi into the stationary vessel, and
a feed assembly operable to advance mineral into the upper end of the rotary vessel such that mineral passes through the stationary
vessel prior to advancement into the inclined rotary vessel,
wherein the stationary vessel has a tertiary air inlet, and the injector is positioned to introduce the quantity of high pressure
air at a location on the stationary vessel above the tertiary air inlet.
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