|
|
|
| Process and property optimization of ceramsite preparation by Bayan Obo tailings and blast furnace slag |
| Yi-fan Chai1, Wen-xian Hu1, Yun-hao Zhang1, Yi-ci Wang1, Jun Peng1,2, Sheng-li An1,2 |
1 School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
2 Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Baotou 014010, Inner Mongolia, China |
|
|
|
|
Abstract The ceramsite was prepared by using Bayan Obo tailings and blast furnace slag of Baotou Steel as the main raw materials and coal gangue as pore-forming agent, and the process system and the performance of ceramsite were optimized. The phase transformation rules of the ceramsite prepared by multi-source solid waste in sintering method were clarified. The influence of sintering process parameters on ceramsite performance and the purification effect of ceramsite on ammonia nitrogen wastewater were revealed. The results show that the reasonable proportion of raw materials for preparing ceramsite is 60% tailings, 35% blast furnace slag and 5% coal gangue. The reasonable preparation process of ceramsite is preheating at 350 °C for 12 min, increasing the temperature to 750 °C and holding for 60 min, then increasing the temperature to 1130 °C and roasting for 20 min. The cooling method is to cool down with the furnace. The prepared ceramsite has compressive strength of 1.89 MPa, porosity of 51.31%, water absorption of 31.42%, and bulk density of 1.94 g/cm3. When the ceramsite is used to treat ammonia nitrogen wastewater, the removal rate of ammonia nitrogen is 47.33%.
|
|
Received: 06 December 2022
Published: 25 July 2023
|
|
|
|
| Cite this article: |
|
Yi-fan Chai,Wen-xian Hu,Yun-hao Zhang, et al. Process and property optimization of ceramsite preparation by Bayan Obo tailings and blast furnace slag[J]. Journal of Iron and Steel Research International, 2023, 30(7): 1381-1389.
|
|
|
|
| [1] |
Wei-cheng Xu, Wei-cheng Zheng, Ling Zhao, Hao-tian Wu, Yu-xi Wu, Hai-li Li, Hao Zhang, Hong-ming Long. Preparation and properties of flame-retardant rubber composites based on steel slag filler[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(7): 1334-1341. |
| [2] |
Tao Yang, Jing-shu An, Xing-wang Li, Shuang Liu, Xu Gao, Lei Ma, Jie Lei, Hong-ming Long. Effect of quaternary basicity on reduction behavior of iron-bearing dust pellets[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(7): 1356-1366. |
| [3] |
Ting Wu, Yu-qi Kong, Jiu-chang Zhang, Xin-yu Wang, Lei Ma, Tao Yang, Jie Lei, Hong-ming Long. Agglomeration and bonding mechanism of typical metallurgical solid wastes[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(7): 1390-1400. |
| [4] |
Yi Huang, Xiang-jie Duan, Yu Li, Wei Zhang. Preparation of gangue ceramsite by sintering pot test and potential analysis of waste heat recovery from flue gas[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(7): 1401-1410. |
| [5] |
Wen-chao He, Ming-shuai Luo, Yin Deng, Yue-lin Qin, Shuo Zhang, Xue-wei Lv, Yong Zhao, Cheng-zhe Jiang, Zheng-de Pang. Preparation of high acidity coefficient slag wool fiber with blast furnace slag and modifying agents[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(7): 1440-1450. |
| [6] |
Wei-guo Kong, Ji-hui Liu, Yao-wei Yu, Xin-mei Hou, Zhi-jun He. Effect of w(MgO)/w(Al2O3) ratio and basicity on microstructure and metallurgical properties of blast furnace slag[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2021, 28(10): 1223-1232. |
|
|
|
|
2023, Vol. 30 
