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Preparation of high acidity coefficient slag wool fiber with blast furnace slag and modifying agents

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Abstract

Preparation of high acidity coefficient slag wool fiber with molten slag and modifying agents is considered to be a positive approach for value-added utilization of blast furnace slag. In order to achieve the multi-purposes of fiber-forming, energy saving, and waste heat recovery, the modifying agents that can improve the acidity coefficient of slag effectively, economically, and environmentally were investigated. Three agents with different acidity coefficients were adopted to modify slag and manufacture wool fibers. The effect of agent and slag proportion on the melting temperature and viscosity of molten slag was studied at a fixed acidity coefficient of 1.8 and 2.0. The results indicate that the sample modified with high acidity coefficient agent and high slag proportion has lower melting temperature and viscosity. The effect of agent and slag temperature on the fiber diameter was also investigated when the acidity coefficient of slag is 2.0. At a fixed slag proportion of 50 wt.%, the mean diameter decreases with increasing temperature and decreasing viscosity coefficient. Besides, the temperature drops caused by the addition of agents and energy consumption of samples for heating the slag were also analyzed.

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Acknowledgements

The authors are especially thankful to the National Natural Science Foundation of China (Grant No. 51974054), Scientific and Technological Research Program of Chongqing Municipal Education Commission (No. KJQN202201537), Research Foundation of Chongqing University of Science and Technology (No. ckrc2020017), Natural Science Foundation Project of Chongqing (No. cstc2021jcyj-msxmX0911), and Chongqing Science and Technology Commission (No. sl202100000144).

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Authors and Affiliations

  1. School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 400044, China

    Wen-chao He, Ming-shuai Luo, Yin Deng & Yue-lin Qin

  2. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Shuo Zhang & Xue-wei Lv

  3. Environmental Resources Technology Co., Ltd., Baowu Group, Shanghai, 201999, China

    Yong Zhao, Cheng-zhe Jiang & Zheng-de Pang

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  1. Wen-chao He
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  2. Ming-shuai Luo
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  4. Yue-lin Qin
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Correspondence to Wen-chao He or Yue-lin Qin.

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Xue-wei Lv is an editorial board member for Journal of Iron and Steel Research International and was not involved in the editorial review or the decision to publish this article. The authors declare no conflict of interest.

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He, Wc., Luo, Ms., Deng, Y. et al. Preparation of high acidity coefficient slag wool fiber with blast furnace slag and modifying agents. J. Iron Steel Res. Int. 30, 1440–1450 (2023). https://doi.org/10.1007/s42243-023-01008-1

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  • DOI: https://doi.org/10.1007/s42243-023-01008-1

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