我国电力工业年耗原煤5亿t，排放灰渣高达1.5亿t，粉煤灰累计堆存量已高达12.5亿t。不仅严重污染环境，且占用大量土地。综合利用粉煤灰已刻不容缓。 我国建筑材料一直沿用传统的砖瓦，粘土实心砖占墙体材料的85%，全国年产粘土实心砖7 000亿块，每年烧砖毁田达几十万亩，而且 China’s power industry consumes 500 million tons of raw coal a year, with a discharge of as much as 150 million tons of ash and 1,200 million tons of accumulated fly ash. Not only serious pollution of the environment, and take up a lot of land. Comprehensive utilization of fly ash has been urgent. China’s building materials have been using the traditional brick, clay solid brick wall materials account for 85% of the country with an annual output of 700 billion solid clay bricks, destroyed hundreds of thousands of acres of burned brick annually, and