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Title:
METHOD AND SYSTEM FOR RECOVERY OF VALUABLE ELEMENT IN CEMENT CALCINATION PLANT
Document Type and Number:
Japanese Patent JP2007130565
Kind Code:
A
Abstract:

To provide a method and system for the recovery of valuable elements in a cement calcination plant which enables an efficient recovery of valuable elements contained in exhaust gas and their recycle as resources, in the utilization of various types of wastes as a cement raw material and a heat energy source in the plant.

The method is employed in a cement calcination plant equipped with a kiln 1 calcining cement raw materials and a preheater 3 heating the cement raw materials preliminarily with exhaust gas discharged from the kiln 1. The method comprises the extraction of the exhaust gas of temperatures ranging from 200 to 800°C from the preheater 3 and recovering one or more valuable elements of lead, thallium, arsenic, cadmium, zinc, mercury and bromine from the exhaust gas.


Inventors:
ASAKURA ETSURO
TANAKA HISANOBU
KOGA YASUO
SHIMOZAKA KENICHI
YAMASHITA MAKIO
Application Number:
JP2005325644A
Publication Date:
May 31, 2007
Filing Date:
November 10, 2005
Export Citation:
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Assignee:
MITSUBISHI MATERIALS CORP
UBE INDUSTRIES
International Classes:
B01D53/64; B01D53/68; B01D53/77; C04B7/44; C22B13/02; C22B17/02; C22B19/04; C22B30/04; C22B43/00; C22B61/00; F27D17/00
Domestic Patent References:
JPH04156920A1992-05-29
JP2006347794A2006-12-28
JP2002355531A2002-12-10
JPH11246247A1999-09-14
JP2000279756A2000-10-10
JP2001232149A2001-08-28
JP2002210447A2002-07-30
JPH09227184A1997-09-02
JP2005097005A2005-04-14
JP2005213527A2005-08-11
Attorney, Agent or Firm:
Chiharu Shimizu