一、粉煤灰的产量和利用简况表1为RIEM委员会汇编的一些国家1982年的粉煤灰产量估计数。美国1982年各类工厂燃煤产生的固体废渣包括粉煤灰、底灰、炉渣(湿底灰)在内的总量为6,500万吨。其中有4,800万吨粉煤灰,而被利用的仅为800万吨(约17％),4,000万吨被抛掉。美国全国粉煤灰协会的统计资料表明,在1982年被利用的大约800万吨粉煤灰中,近半数约350万吨被公司本身所利用。主要 I. PRODUCTION AND UTILIZATION OF FLY ASH Table 1 is a summary of fly ash production estimates for some countries in 1982 compiled by the RIEM Commission. In the United States, a total of 65 million tons of solid waste including coal ash, bottom ash and slag (bottom ash) were produced from coal combustion in various factories in the United States in 1982. Of these, 48 million tons of fly ash were used, while only 8 million tons (about 17%) were used and 40 million tons were thrown away. Statistics from the National Association of Fly Ash suggest that of the approximately 8 million tons of fly ash utilized in 1982, almost half of the approximately 3.5 million tons were utilized by the company itself. main