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研究了Blaine比表面积分别为426m2/kg和836m2/kg的2种高炉矿渣细粉S4和S8对铬(VI)离子的还原固化作用。结果表明:在含铬(VI)水溶液和粉煤灰硬化体中掺加高炉矿渣细粉后,可以降低水溶液中铬(VI)离子的含量和抑制粉煤灰硬化体中铬(VI)离子的溶出;高炉矿渣细粉的比表面积越大,对铬(VI)离子的还原能力越强。采用硫酸高铈硫酸亚铁溶液氧化还原滴定法可以快速评定高炉矿渣细粉的还原能力,其结果与实际溶出试验结果有很好的对应性。
The reduction and solidification of chromium (VI) ions by two blast furnace slag powders S4 and S8 with Blaine specific surface area of 426m2 / kg and 836m2 / kg, respectively, were studied. The results show that the content of Cr (VI) in aqueous solution and the content of Cr (VI) in the hardened material of fly ash can be decreased by adding blast furnace slag fines into Cr (VI) aqueous solution and fly ash hardened body Dissolution; Blast furnace slag, the greater the specific surface area, the reduction of chromium (VI) ions, the stronger the ability. The redox titration of ferrous sulfate-ferrous sulfate solution can be used to quickly evaluate the reducing ability of blast furnace slag. The result is in good agreement with the actual dissolution test results.