Separation of High LOI Fly Ash

1999 Conference on Unburned Carbon in Fly Ash

Yee Soong ; John Baltrus ; Kenneth J. Champagne ; Daniel J. Fauth ; McMahan L. ; Gray ; James P. Knoer ; Thomas A. Link ; Terri L. Newby ; William D. Sands ; Michael. R. Schoffstall

Others  :  http://www.netl.doe.gov/publications/proceedings/99/99flyash/soong.pdf
PID  :  47763

来源: CEUR

【 摘 要 】

The utilization of combustion byproducts, in particular fly ash, has an important impact on the cost and environmental impact of power production from coal. Improved beneficiation and utilization schemes forhigh loss-on-ignition (LOI) fly ash can transform this combustion byproduct from a waste material, withassociated disposal costs, to a valuable product. The utilization of power-plant-derived fly ash has beenimpacted by recent shifts to low-NO burners which can increase the carbon content of the ash above the xspecification for its use in Portland cement. The ability to efficiently extract high purity carbon or ash is important in the development and application of cost-effective beneficiation technologies for the productionof value-added products. A focus of FETC’s in-house research effort is to develop technologies for separation of the inorganic and unburned carbon phases in pulverized coal combustor fly ashes. Researchactivities in this area involve performing separations of combustion byproducts using either a dry triboelectrostatic or a wet agglomeration column technique.[first paragraph]