Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results
Joint Authors
Kang, Qian
Sun, Guoquan
Zhou, Keping
Wang, Daolin
Xiao, Chongchun
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-28
Country of Publication
Egypt
No. of Pages
12
Abstract EN
Focusing on the tailings containing high sodium silicate (water glass), this study conducted laboratory experiments and semi-industrial tests of flocculation and sedimentation for rapid tailings dewatering.
Various reagent combinations, lime and anionic flocculant (APAM) (L&A), sulfuric acid and APAM (S&A), and calcium chloride and APAM (C&A), were tested.
The results show that (i) all the three combinations presented a good effect in the laboratory experiments, and the relatively optimum dosages were L&A of 2 kg/t & 30 g/t, S&A of 2.6 kg/t & 20 g/t, and C&A of 3 kg/t & 30 g/t.
(ii) The overflow water of the L&A group became turbid after 10 hours, and the pH increased to 14.
While, for the S&A and C&A groups, the solid content in overflow wastewater (SCOW) fluctuated over time but could be mostly controlled in 300 ppm.
The pH declined from 7 to 4 with time in the S&A group, and it was 7-8 in the C&A group.
(iv) Thus, a backfill system with dewatering technology based on the C&A combination was designed.
In the field application, the overflow water was recycled with the SCOW of less than 250 ppm and the pH of 7.5, while the underflow concentration was greater than 70 wt.%.
The achievement provides a way to utilize the tailings containing sodium silicate effectively and environmentally, which will reduce the tailings dam on the Earth.
American Psychological Association (APA)
Sun, Guoquan& Zhou, Keping& Kang, Qian& Wang, Daolin& Xiao, Chongchun. 2020. Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1127903
Modern Language Association (MLA)
Sun, Guoquan…[et al.]. Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1127903
American Medical Association (AMA)
Sun, Guoquan& Zhou, Keping& Kang, Qian& Wang, Daolin& Xiao, Chongchun. Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1127903
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1127903