Size Adjustment and Heavy Metal Removal of Fly Ash through Continuous Process

A continuous process is proposed for adjusting the particle size of fly ash and removing heavy metals from the ash. The reactor of the process is a cylindrical vessel with a semi-spherical bottom. Many spherical balls are placed on the bottom. A fly ash-laden water jet or a fly ash-laden air-water t...

Full description

Saved in:
Bibliographic Details
Published inTetsu-to-Hagane Vol. 103; no. 3; pp. 166 - 173
Main Authors Sakai, Yusuke, Iguchi, Manabu, Naito, Satoshi, Maruyama, Toshihiko, Nakahata, Yusuke, Shitara, Moriyoshi
Format Journal Article
LanguageJapanese
Published The Iron and Steel Institute of Japan 2017
Subjects
bubbling jet
coal
continuous process
fly ash
heavy metal
swirl motion
Online AccessGet full text

Cover

More Information
Summary:A continuous process is proposed for adjusting the particle size of fly ash and removing heavy metals from the ash. The reactor of the process is a cylindrical vessel with a semi-spherical bottom. Many spherical balls are placed on the bottom. A fly ash-laden water jet or a fly ash-laden air-water two-phase jet is injected vertically downwards onto the balls to crush the ash until a predetermined ash size is obtained. The fly ash thus size-controlled is lifted up towards the bath surface by rising water. The flow field near the bath surface is strongly agitated by swirl motion of a bubbling jet. The heavy metals contained in the ash are extracted from the ash into the water near the bath surface and then carried out of the reactor together with the processed ash.
ISSN:0021-1575
1883-2954
DOI:10.2355/tetsutohagane.TETSU-2016-039