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为防止燃煤热电厂排出的含硫烟气污染环境,我国从90年代开始采用烟气脱硫新工艺,但该工艺采用碳酸钙粉末脱硫后遗留大量的脱硫二水石膏,为工业废弃物,如不加以利用,势必污染环境。近来重庆建筑大学材料系采用这一废料生产出了空心砌块。他们将该灰含约10％游离水的脱硫二水石膏在170～200℃温度中先行脱水,恒温3～4h,成为脱硫建筑石膏,经陈化7d左右,该石膏具有标准稠度、用水
In order to prevent the sulfur-containing flue gas emitted from coal-fired thermal power plants from polluting the environment, a new flue gas desulfurization process has been adopted in China since the 1990s, but this process uses calcium carbonate powder desulphurization to leave a large amount of desulfurized dihydrate gypsum, which is industrial waste, if not To use it is bound to pollute the environment. The Department of Materials of Chongqing University of Construction recently used this waste to produce hollow blocks. They desulphurized dihydrate gypsum containing about 10% of free water in the ash at a temperature of 170 to 200°C and dehydrated at a constant temperature of 3 to 4 hours to become a desulfurization building gypsum. After about 7 days of aging, the gypsum has a standard consistency and water