Iron ore tailings used for the preparation of cementitious material by compound thermal activation

Zhong-lai Yi1), Heng-hu Sun1), Xiu-quan Wei2), and Chao Li1) 1) Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China 2) Department of Resources, China University of Mining & Technology (Beijing), Beijing 100083, China

摘 要：In the background of little reuse and large stockpile for iron ore tailings, iron ore tailing from Chinese Tonghua were used as raw material to prepare cementitious materials. Cementitious properties of the iron ore tailings activated by compound thermal activation were studied. Testing methods, such as XRD, TG-DTA, and IR were used for researching the phase and structure variety of the iron ore tailings in the process of compound thermal activation. The results reveal that a new cementitious material that contains 30wt% of the iron ore tailings can be obtained by compounded thermal activation, whose mortar strength can come up to the standard of 42.5 cement of China.

关键词：