留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码
数据统计

分享

计量
  • 文章访问数:  96
  • HTML全文浏览量:  36
  • PDF下载量:  8
  • 被引次数: 0
Xiaoyan Zhang, Tianrun Cao, Lang Liu, Baoyun Bu, Yaping Ke, and Qiangqiang Du, Experimental study on thermal and mechanical properties of tailings-based cemented paste backfill with CaCl2·6H2O/expanded vermiculite shape stabilized phase change materials, Int. J. Miner. Metall. Mater.,(2022). https://doi.org/10.1007/s12613-022-2503-7
Cite this article as:
Xiaoyan Zhang, Tianrun Cao, Lang Liu, Baoyun Bu, Yaping Ke, and Qiangqiang Du, Experimental study on thermal and mechanical properties of tailings-based cemented paste backfill with CaCl2·6H2O/expanded vermiculite shape stabilized phase change materials, Int. J. Miner. Metall. Mater.,(2022). https://doi.org/10.1007/s12613-022-2503-7
引用本文 PDF XML SpringerLink
  • Research Article

    Experimental study on thermal and mechanical properties of tailings-based cemented paste backfill with CaCl2·6H2O/expanded vermiculite shape stabilized phase change materials

    + Author Affiliations
    • CaCl2·6H2O/expanded vermiculite shaped stabilized phase change materials (CEV) was prepared by atmospheric impregnation method. Using gold mine tailings as aggregate of cemented paste backfill (CPB) material, the CPB with CEV added was prepared, and the specific heat capacity, thermal conductivity and uniaxial compressive strength (UCS) of CPB with different cement-tailing ratios and CEV addition ratios were tested, the influence of the above variables on the thermal and mechanical properties of CPB was analyzed. The results show that the maximum encapsulation capacity of expanded vermiculite for CaCl2·6H2O is about 60%, and the melting and solidification enthalpy of CEV can reach 98.87 J/g and 97.56 J/g respectively. For the CPB without CEV, the specific heat capacity, thermal conductivity and UCS decrease with the decrease of cement-tailing ratio. For the CPB with CEV added, with the increase of CEV addition ratio, the specific heat capacity increases significantly, and its sensible heat storage capacity and latent heat storage capacity can be increased by at least 10.74% and 218.97% respectively after adding 12% CEV. However, the addition of CEV leads to the increase of pores, and its thermal conductivity and the UCS both decrease with the increase of CEV addition. When cement-tailing ratio is 1:8 and 6%, 9%, 12% of CEV are added, the 28-days UCS of CPB is less than 1 MPa. Considering the heat storage capacity and cost price of backfill, the recommended proportion scheme of CPB material presents cement-tailing ratio of 1:6 and added 12% CEV, and the most recommended heat storage/release temperature cycle range of CPB with added CEV is from 20 ℃ to 40 ℃. Therefore, this paper can provide theoretical support for the utilization of heat storage backfill in green mines

    • loading

    Catalog

      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

    • /

      返回文章
      返回