Table of Contents
Magnetic and Electrical Separation
Volume 10, Issue 1, Pages 21-27

Removal of Iron From Fly Ash for Ceramic and Refractory Applications

Regional Research Laboratory (Council of Scientific and Industrial Research), Bhubaneswar 751 013, India

Received 21 October 1998; Revised 5 February 1999; Accepted 12 February 1999

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The natural resources of refractory raw materials are declining and at the same time the consumption rate is increasing, particularly in iron and steel industries. Any attempt to identify a new raw material source from the waste dumps could solve the national economy as well as environmental problems. In view of this, fly ash from thermal power plant has been identified for use in the ceramic/refractory industries after suitable beneficiation. For this wet high intensity magnetic separation studies carried out on typical fly ash sample indicate that the non-magnetic fraction (product) containing 24% Al2O3, 67% SiO2, 1.7% Fe2O3could be achieved with 63% recovery. This product is acceptable as a ceramic and refractory raw material after the necessary blending.