水淬锰渣-炉渣-石灰石复合微粉的活性试验

Activation of superfine-powder admixture of water-cooled manganese,slag-furnace and slag-limestone

研究了经过物理激发的水淬锰渣微粉和炉渣微粉活性指数,进而确定水淬锰渣、炉渣适宜的比表面积;采用石膏、生石灰、水玻璃3种激发剂对水淬锰渣、炉渣、石灰石复合微粉进行了化学激发试验;探讨单一激发和复合激发对复合微粉的影响。结果表明:物理激发微粉时,水淬锰渣的适宜比表面积为470 m^(2)/kg,炉渣的适宜比表面积为410 m^(2)/kg;化学激发复合微粉时,使用4%的石膏和1%生石灰作为复合激发剂对复合微粉激发效果最佳,7、28 d活性指数达到最高,此时复合微粉7 d活性指数为55.7%,28 d活性指数为78.3%,均满足《用于水泥、砂浆和混凝土中的粒化高炉矿渣粉》(GB/T 18046—2017)中S75等级标准。

The activation index of water quenched manganese slag powder and slag powder after physical excita-tion is studied,and the suitable specific surface area of water quenched manganese slag and slag is determined in this paper.Then the chemical excitation test of water-cooled manganese slag-slag-limestone composite powder is carried out by using gypsum,quicklime and sodium silicate as three activators.The effects of single excitation and compound excitation on composite powders are studied respectively.The results show that the optimum spe-cific surface area of water quenched manganese slag and slag are 470 and 410 m^(2)/kg,respectively,when the powders are physically excited.When the compound powder is chemically excited,the best excitation effect is obtained by using gypsum content accounting for 4%of the total compound powder and quicklime content ac-counting for 1%of the total compound powder,and the activity index of the compound powder is the highest.At this time,the activity index of the compound powder is 55.7%for 7 d and 78.3%for 28 d,both reaching the S75 standard.