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我国是煤炭消费大国,粉煤灰作为煤燃烧后的产物,产量逐年增加,已从“十一五”前的3亿吨,上涨到“十一五”末的5亿吨,在近日召开的“2015亚洲粉煤灰及脱硫石膏处理与技术国际交流大会”上,专家预测,2015年粉煤灰预计年产6.2亿吨。粉煤灰是燃煤电厂排出的主要固体废物,主要元素组成有:Si、Al、Fe、Ti、Ca和O等,如果不经处理,其将造成扬尘,污染大气,进入水系统,会造成水系淤塞,粉煤灰中还含有有毒物质,会危及人体健康和生物活性。
China is a coal-consuming country. As the product of coal combustion, fly ash has been increasing year by year. From the 300 million tons before the 11th Five-Year Plan to the 500 million tons at the end of the 11th Five-Year Plan, In the recently held “2015 Asian Fly Ash and Gypsum Treatment and Technology International Exchange Conference,” experts predict that in 2015 the annual output of fly ash is expected to reach 620 million tons. Fly ash is the main solid waste discharged from coal-fired power plants. The main elements are: Si, Al, Fe, Ti, Ca and O, which will cause dust, pollute the atmosphere and enter the water system if untreated, Water system siltation, fly ash also contains toxic substances, will endanger human health and biological activity.