The preparation of auxiliary cementitious materials for tailings is an important way to realize the complete resource utilization of tailings. The effects of mechanochemical activation on particle size and specific surface area of tungsten tailings were studied, the effects of different activation methods and activator types on the mechanical strength of mortar test block prepared by tungsten tailings were studied, and the phase and microstructure of the products were characterized by XRD, SEM and IR. The results show that, the mechanical chemical activation can effectively reduce the average particle size and increase the activity index of the mortar block, the optimal formula is ternary composite activator, followed by binary composite activator, and the weakest is single activator. After activation of tungsten tailings by the ternary composite activators of H1, C1 and G1, the results show that the tailings with diameter less than 10 μm can reach 70.07% and the activity index of mortar test block can reach 88.11%. The essence of mechanochemical activation is to destroy the crystal structure of tailings and increase its indicative disordered substances and vibration energy, a large number of six side plate Ca(OH)2 were formed in the hydration products, and finally formed C-S-H gel and ettringite with large particle size. © 2021, Materials Review Magazine. All right reserved.
