| To take full advantage of industrial waste, use manganese slag instead of certain percentage of blast furnace slag granulated as cement admixture, start with small grinding and production test to find the impact of manganese slag to production process, production, cement quality, energy consumption. The result shows: because of manganese slag with high moisture content , it's easy to agglomerate and cause blocking , broken material; When the mixing ratio of manganese slag is 50%, the coal consumption of dry slag increases by 17.3%; Compressive strength of 3 d and 28 d decreases with manganese slag ，setting time extends nearly 2 h, but after adding manganese slag ,both setting time and compressive strength of different varieties of cement exist a turning point, indicating that there is an optimal dosage. |