Title:
ALKALI METAL REMOVAL METHOD AND ALKALI METAL REMOVAL DEVICE
Document Type and Number:
Japanese Patent JP2021146236
Kind Code:
A
Abstract:
To provide an alkali metal removal method for effectively removing alkali metals from flying ashes of woody biomass ashes to effectively utilize the alkali metals as a cement raw material.SOLUTION: A method for removing alkali metals from flying ashes of woody biomass combustion ashes includes: a step (a) of classifying flying ashes into fine powder and coarse powder; a step (b) of acquiring a pulverized object by pulverizing a surface part of the coarse powder that is acquired from the step (a); a step (c) of classifying the pulverized object that is acquired from the step (b) into pulverized fine powder and pulverized coarse powder; a step (d) of acquiring a heat treatment object by heating the pulverized fine powder that is acquired from the step (c) together with a chlorine source; and a step (e) of washing with water the fine powder that is acquired from the step (a) and the heat treatment object that is acquired from the step (d).SELECTED DRAWING: Figure 1
Inventors:
TATSUMI YOSHINORI
TERASAKI JUNICHI
TERASAKI JUNICHI
Application Number:
JP2020046011A
Publication Date:
September 27, 2021
Filing Date:
March 17, 2020
Export Citation:
Assignee:
TAIHEIYO CEMENT CORP
International Classes:
B09B3/00; B02C19/06; B07B7/083; B09B5/00; C04B7/38
Domestic Patent References:
| JP2004155872A | 2004-06-03 | |||
| JP2018118229A | 2018-08-02 | |||
| JP2013013843A | 2013-01-24 | |||
| JP2017122550A | 2017-07-13 | |||
| JP2020157230A | 2020-10-01 | |||
| JP2021146335A | 2021-09-27 | |||
| JP2003211129A | 2003-07-29 |
Foreign References:
| US6821384B1 | 2004-11-23 |
Attorney, Agent or Firm:
Patent Business Corporation Unias International Patent Office