Investigation on the fabrication of lightweight aggregate with acid-leaching tailings of vanadium-bearing stone coal minerals and red mud

Chunguang Song; Hongling Zhang; Yuming Dong; Lili Pei; Honghui Liu; Junsheng Jiang; Hongbin Xu

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Investigation on the fabrication of lightweight aggregate with acid-leaching tailings of vanadium-bearing stone coal minerals and red mud

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Investigation on the fabrication of lightweight aggregate with acid-leaching tailings of vanadium-bearing stone coal minerals and red mud
- Chinese Journal of Chemical Engineering Vol. 32, Issue 4, Pages: 353-359(2021)
- Affiliations：
  
  1. CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  3. University of Chinese Academy of Sciences,Beijing,China,100049
  4. RH Mining Resources Limited,Hong Kong,China
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2021
- Accepted：
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Chunguang Song, Hongling Zhang, Yuming Dong, Lili Pei, Honghui Liu, Junsheng Jiang, Hongbin Xu. Investigation on the fabrication of lightweight aggregate with acid-leaching tailings of vanadium-bearing stone coal minerals and red mud[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 353-359.
DOI：

Chunguang Song, Hongling Zhang, Yuming Dong, Lili Pei, Honghui Liu, Junsheng Jiang, Hongbin Xu. Investigation on the fabrication of lightweight aggregate with acid-leaching tailings of vanadium-bearing stone coal minerals and red mud[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 353-359. DOI：

摘要

Abstract

Proper treatment of acid-leaching tailings (ALTs) of vanadium-bearing stone coal minerals is of great urgency. One approach is adding it into the raw materials during the preparation of lightweight aggregate (LWA). But clay is always needed. In this paper

another solid waste

red mud

was mixed with ALTs as a source of flux components instead of clay. Evaluation of the physical characteristics

morphological structures

as well as crystal phases during the sintering process were investigated. When their mixtures with a proper ratio were sintered at 1080℃

a glassy phase with certain viscosity was formed

and the gases generated simultaneously were encapsulated by the melt. Finally

LWA with a one-hour water absorption as low as 1.46%

a bulk density as low as 728.76 kg·m

-3

and a compressive strength as high as 10.77 MPa was fabricated.

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