Cite this article as:

Research Article

Effects of SiO2 on the preparation and metallurgical properties of acid oxidized pellets

+ Author Affiliations
  • Received: 23 October 2020Revised: 8 December 2020Accepted: 9 December 2020Available online: 12 December 2020
  • The influences of w(SiO2) on the preparation and metallurgical properties including: compressive strength, reduction and softening-melting behaviors of acid oxidized pellets were investigated systematically. And the changes of mineralogical structures, element distribution and pore size distribution were employed for influence mechanism analysis. The results showed that with the increase of w(SiO2), the compressive strength and reduction behaviors of pellets were gradually deteriorated, mainly because that the pellets with high content of SiO2 had the more content of magnetite in the mineralogical structures and some liquid phase appeared, which hindering the continuous crystallization process of hematite. Also, the softening-melting properties of pellets were obviously deteriorated with the increase of w(SiO2). The temperature range of softening-melting zone, the maximum differential pressure and comprehensive permeability index all increased significantly with the increase of w(SiO2). When acid oxidized pellets were used as raw materials for blast furnace smelting, it should be used in combination with high basicity sinter to improve the softening-melting behaviors of the comprehensive charge.
  • 加载中
  •  

  • [1] Xiao-min You,Xue-feng She,Jing-song Wang,Qing-guo Xue, and Ze-yi Jiang, Preparation of CaO-containing carbon pellets from coking coal and calcium oxide: Effects of temperature, pore distribution and carbon structure on compressive strength in pyrolysis furnace, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-021-2255-9
    [2] Xiao-guang Liu,Qiu-shuo Mao,Yue Jiang,Yan Li,Jia-lin Sun, and Fei-xue Huang, Preparation of Al2O3–SiO2 composite aerogels and their Cu2+ absorption properties, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2111-3
    [3] Ali Shabani, Mohammad Reza Toroghinejad, and  Alireza Bagheri, Effects of intermediate Ni layer on mechanical properties of Al–Cu layered composites fabricated through cold roll bonding, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1604-9
    [4] Cong Feng, Man-sheng Chu, Jue Tang, and  Zheng-gen Liu, Effects of smelting parameters on the slag/metal separation behaviors of Hongge vanadium-bearing titanomagnetite metallized pellets obtained from the gas-based direct reduction process, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1608-5
    [5] Li Lin, Bao-shun Li, Guo-ming Zhu, Yong-lin Kang, and  Ren-dong Liu, Effects of Nb on the microstructure and mechanical properties of 38MnB5 steel, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1670-z
    [6] Yu Li, Li-hua Zhao, Ya-kun Wang, and  Da-qiang Cang, Effects of Fe2O3 on the properties of ceramics from steel slag, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1586-7
    [7] Lavish Kumar Singh, Alok Bhadauria, Amirthalingam Srinivasan, Uma Thanu Subramonia Pillai, and  Bellambettu Chandrasekhara Pai, Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1476-4
    [8] Dong-hui Liu, Hao Liu, Jian-liang Zhang, Zheng-jian Liu, Xun Xue, Guang-wei Wang, and  Qing-feng Kang, Basic characteristics of Australian iron ore concentrate and its effects on sinter properties during the high-limonite sintering process, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1487-1
    [9] Yi-fan Zhang, Zhen Ji, Ke Chen, Cheng-chang Jia, Shan-wu Yang, and  Meng-ya Wang, Preparation and radar-absorbing properties of Al2O3/TiO2/Fe2O3/Yb2O3 composite powder, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1398-1
    [10] Xiu-ying Ni, Jun Zhao, Jia-lin Sun, Feng Gong, and  Zuo-li Li, Effects of metal binder on the microstructure and mechanical properties of Al2O3-based micro-nanocomposite ceramic tool material, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1466-6
    [11] Peng Zhou, Jun-hong Chen, Meng Liu, Peng Jiang, Bin Li, and  Xin-mei Hou, Microwave absorption properties of SiC@SiO2@Fe3O4 hybrids in the 2-18 GHz range, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1464-8
    [12] Jian-fang Lü, Zhe-nan Jin, Hong-ying Yang, Lin-lin Tong, Guo-bao Chen, and  Fa-xin Xiao, Effect of the CaO/SiO2 mass ratio and FeO content on the viscosity of CaO-SiO2-“FeO”-12wt%ZnO-3wt%Al2O3 slags, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1459-5
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Share Article

Article Metrics

Article views(163) PDF downloads(4) Cited by()

Proportional views

Effects of SiO2 on the preparation and metallurgical properties of acid oxidized pellets

  • Corresponding author:

    Qing Lyu    E-mail: lq@ncst.edu.cn

  • 1. School of Metallurgy, Northeastern University, Shenyang 110819, China
  • 2. College of Metallurgy & Energy, North China University of Science and Technology, Tangshan 063009, China
  • 3. HBIS Group Hansteel Company, Handan 05600, China

Abstract: The influences of w(SiO2) on the preparation and metallurgical properties including: compressive strength, reduction and softening-melting behaviors of acid oxidized pellets were investigated systematically. And the changes of mineralogical structures, element distribution and pore size distribution were employed for influence mechanism analysis. The results showed that with the increase of w(SiO2), the compressive strength and reduction behaviors of pellets were gradually deteriorated, mainly because that the pellets with high content of SiO2 had the more content of magnetite in the mineralogical structures and some liquid phase appeared, which hindering the continuous crystallization process of hematite. Also, the softening-melting properties of pellets were obviously deteriorated with the increase of w(SiO2). The temperature range of softening-melting zone, the maximum differential pressure and comprehensive permeability index all increased significantly with the increase of w(SiO2). When acid oxidized pellets were used as raw materials for blast furnace smelting, it should be used in combination with high basicity sinter to improve the softening-melting behaviors of the comprehensive charge.

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return