一.前言电厂粉煤灰是火力发电厂的废渣,弃之多害,用之多利,充分利用粉煤灰于工、农业生产,是变害为利、发展生产、保护环境、造福人民的重大措施。经过试验证明,电厂粉煤灰是一种多功效的土壤改良剂,是极为有利的资源。目前我国热电厂的灰渣分布广,数量大,据有关统计资料年排灰量近3000万吨。仅陕西省七个热电厂统计年排灰量在100万吨以上,灰场积灰已达500多万吨,灰场占地约2000余亩,不仅占用大量土地,并且还污染环境,危害群众生活。全 I. Introduction Power plant fly ash is thermal power plant waste, abandoned more harm, with more profit, make full use of fly ash in industrial and agricultural production, is to change harm for the benefit of the development of production, environmental protection, the benefit of the people of major Measures. After tests show that power plant fly ash is a multi-effect soil improver, is a very favorable resource. At present, China’s thermal power plant ash is widely distributed, the number of large, according to the statistics of the annual ash discharge of nearly 30 million tons. Only seven thermal power plants in Shaanxi Province in the statistical year emissions of ash in more than 1 million tons, gray ash deposition has reached more than 500 million tons, an area of ​​about 2,000 acres of ash field, not only occupy a large amount of land, but also pollute the environment and endanger the lives of people . all