Recovering pozzolanic material,a carbon concentrate,an iron concentrate and sintered aggregate from fly ash
Abstract
Abstract FLY ASH IS SUBJECTED TO A MAGNETIC SEPARATION TO REMOVE AN IRON CONCENTRATE PRODUCT. THE REMAINDER IS THEN SUBJECTED TO AIR CLASSIFICATION TO REMOVE A FINE POZZOLANIC MATERIAL WITH AT LEAST 85% OF THE PARTICLES BEING MINUS 325 MESH. THE REMAINING HEAVY ENDS ARE DRY SCREENED OVER A 100 TO 150 MESH SCREEN TO REMOVE A COARSE PRODUCT CONTAINING AT LEAST 25% CARBON. THE PRECISE DRY SCREEN SIZE IS SELECTED FROM THE RANGE OF 100-150 MESH TO MAINTAIN THE CARBON CONTENT IN THE -100 TO -150 MESH SINTER FRACTION WITH THE RANGE OF 5 TO 8%. THE SINTER FRACTION, IF NECESSARY, IS BLENDED WITH SUFFICIENT AMOUNTS OF POZZOLANIC MATERIAL TO REDUCE THE IRON CONTENT TO BELOW 10%, PELLETIZED AND SINTERED AT 1900*F. TO 2800*F.
Inventors
- 👤 John T Pennachetti
- 👤 Joseph F Boux
Bibliographic Details
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