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Title:
カルシウムの除去方法
Document Type and Number:
Japanese Patent JP5878466
Kind Code:
B2
Abstract:
[Problems] To provide a calcium removal method capable of reducing operation cost. [Means for Solving Problems] A solution L2 containing potassium or/and sodium, and calcium is passed through an ion-exchange resin 35 to separate the solution into a solution containing potassium or/and the sodium, and a solution containing calcium. Operation cost can remarkably be decreased since potassium carbonate is not required to remove calcium as before. Timing for changing a calcium-containing water L3 and a salt water L4 discharged from the ion-exchange resin can be performed based on at least one measurement result selected from the group consisting of: a calcium or chlorine concentration; electrical conductivity; and pH of a fluid which is discharged from said ion-exchange resin. The solution may be a filtrate L1 that is obtained by washing a chlorine bypass dust D generated in a cement burning process, or a leachate W of a final disposal site 50.

Inventors:
Noritoshi Tamura
Takayuki Suzuki
Yuichi Otani
Application Number:
JP2012521371A
Publication Date:
March 08, 2016
Filing Date:
May 11, 2011
Export Citation:
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Assignee:
Taiheiyo Cement Co., Ltd.
International Classes:
C02F1/42; B01J49/00; C04B18/16
Domestic Patent References:
JP2004330148A2004-11-25
JPS6053395U1985-04-15
JP2007260633A2007-10-11
JPH0531185A1993-02-09
JPH1085791A1998-04-07
JP2004262676A2004-09-24
JP2007331993A2007-12-27
JP2003001218A2003-01-07
JP2005314178A2005-11-10
JP2007117965A2007-05-17
JP2000061422A2000-02-29
JP2001070989A2001-03-21
JP2004262676A2004-09-24
JP2007331993A2007-12-27
JP2004330148A2004-11-25
JP2003001218A2003-01-07
JP2005314178A2005-11-10
JP2007117965A2007-05-17
JP2000061422A2000-02-29
JP2001070989A2001-03-21
Attorney, Agent or Firm:
Jun Nakai



 
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