Utilization of Coal Combustion Residues (CCRs Current Status Future Outlook

摘要

1. CCRs are solid minerals that remain after pulverized coal is burned to generate electricity or steam 2. US annual production: 110 million tons 3. Types: a. Fly Ash b. Bottom Ash c. Boiler Slag d. Flue Gas Desulfurization (FGD) Materials. 1. Solid / semi-solid material obtained from flue gas scrubbers (for SO_2 control of high sulfur coals) 2. Predominantly silt size particles 3. May be wet or dry as well as sulfite or sulfate depending on process 4. Types: a. Dry FGD Materials b. Wet FGD Materials ⅰ. Sulfite (Stabilized FGD material) ⅱ. Sulfate (FGD Gypsum).