The preparation of building materials is one of the important resource utilization channels for iron tailing. The magnetized roasted iron tailing from a certain area is taken as the research object and is utilized as cement mixture. The effects of mechanical grinding and thermal activation on improving the activity of magnetized roasted iron tailing are researched. The influences of different dosages of magnetized roasted iron tailing on the important physical and chemical properties of cement are investigated,and the maximum dosage is explored. The results show that,the 28d compressive strength of the prepared cement decreases significantly with the increase of the dosage of magnetized roasted iron tailing. The strength activity index of the magnetized roasted iron tailing is 65％ after it' s mechanically ground to a specific surface area of 679.4 m2/kg and thermal activated at 630 ℃ for 1h. The treated magnetized roasted iron tailings samples are used as mixing materials to prepare cement with a maximum tailings dosage of 40％ while the setting time and strength of the cement meet the requirements specified in GB 175-2023"Common Portland Cement".
关键词
磁化焙烧铁尾矿/活性/水泥混合材/最大掺量
Key words
magnetized roasted iron tailing/activity/cement mixture/maximum dosage
维普
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