METHOD AND APPARATUS FOR DESALINATION OF MAIN ASH AND CONVERSION TO RAW MATERIAL FOR CEMENT

WIPO Patent Application WO/2016/047235

A1

[Problem] To desalinate main ash for use as a raw material for cement, while holding operating costs and equipment costs low. [Solution] A main ash desalination method that involves dissolving a main ash M by adding water W1 at a weight that is at least 0.1 times the weight of the main ash M but less than the weight of the main ash M, classifying a main ash slurry S1 remaining after dissolution, and water washing a fine particle slurry S2 obtained by classification. Crude particles C obtained by classification can be used as raw materials for cement. The main ash slurry S1 may be sprinkled with water during classification, the classification point for classification may be set to more than 0.5 mm and at most 1 mm, or an acidic gas G may be added to the fine particle slurry S2 during water washing. The crude particles C obtained by classification may be used as raw materials for cement after blowing air A, or fine particles F obtained by solid-liquid separation after water washing or while water washing of the fine particle slurry S2 obtained by classification may be used as raw materials for cement.

TATSUMI YOSHINOBU (JP)
NIIJIMA SHUN (JP)

PCT/JP2015/069471

March 31, 2016

July 07, 2015

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TAIHEIYO CEMENT CORP (JP)

B09B3/00; B01F3/12; B03B1/04; B03B5/00; B09B5/00; C04B7/38; F23J1/00

JP2012166170A	2012-09-06
JP2003285020A	2003-10-07
JP2007105692A	2007-04-26
JP2009061365A	2009-03-26
JPH07127837A	1995-05-16

NAKAI JUN (JP)
Nakai 潤 (JP)

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