Preparation and Properties of Autoclaved Sand-Bricks Using Iron Ore Tailings and Waste Rock

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Authors

  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083 ,CN
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083 ,CN
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083 ,CN
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083 ,CN
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083 ,CN

Keywords:

Autoclaving Reaction Activity, Iron Ore Tailings, Waste Rock, Autoclaved Sand-Lime Brick, Tobermorit.

Abstract

This study focuses on autoclaving reaction activity of hornblende, biotite and albite, the influences of the compositional characteristics, ingredients and forming, autoclaving processes and the properties of autoclaved sand-lime brick from iron ore tailings and waste rock. The results are shown as follows: under autoclaving 12 h hydrothermal conditions at 185°C and 1.25 MPa, albite has autoclaving reaction activity while hornblednde and biotite do not have; autoclaving hydration products in albite system contain hibschite and tobermorite; the optimal proportion of major raw materials meeting with the technical requirements of GB11945—1999 for MU15 sand-lime bricks is as follows: iron ore tailings 75%, waste rock 13% and lime 12%; XRD and FE-SEM analyses show that the newly generated crystalline phases in the sand-lime brick samples are tobermorite, hibschite, C-S-H gels, quartz and residual minerals from iron ore tailings.

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Published

2022-10-19

How to Cite

Liu, H., Wang, C., Chen, L., Liu, S., & Yang, J. (2022). Preparation and Properties of Autoclaved Sand-Bricks Using Iron Ore Tailings and Waste Rock. Journal of Mines, Metals and Fuels, 64(12), 684–689. Retrieved from http://informaticsjournals.com/index.php/jmmf/article/view/31635

 

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