Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results
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...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/1918278 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832561181435363328 |
|---|---|
| author | Guoquan Sun Keping Zhou Qian Kang Daolin Wang Chongchun Xiao |
| author_facet | Guoquan Sun Keping Zhou Qian Kang Daolin Wang Chongchun Xiao |
| author_sort | Guoquan Sun |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-e1ba7fb5548441d9bb8fc1fd8a401f84 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-e1ba7fb5548441d9bb8fc1fd8a401f842025-02-03T01:25:49ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/19182781918278Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test ResultsGuoquan Sun0Keping Zhou1Qian Kang2Daolin Wang3Chongchun Xiao4School of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaFeny Co., Ltd., Changsha 410083, ChinaFocusing 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.http://dx.doi.org/10.1155/2020/1918278 |
| spellingShingle | Guoquan Sun Keping Zhou Qian Kang Daolin Wang Chongchun Xiao Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results Advances in Materials Science and Engineering |
| title | Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results |
| title_full | Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results |
| title_fullStr | Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results |
| title_full_unstemmed | Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results |
| title_short | Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results |
| title_sort | design and application of rapid dewatering for tailings containing sodium silicate laboratory and industrial test results |
| url | http://dx.doi.org/10.1155/2020/1918278 |
| work_keys_str_mv | AT guoquansun designandapplicationofrapiddewateringfortailingscontainingsodiumsilicatelaboratoryandindustrialtestresults AT kepingzhou designandapplicationofrapiddewateringfortailingscontainingsodiumsilicatelaboratoryandindustrialtestresults AT qiankang designandapplicationofrapiddewateringfortailingscontainingsodiumsilicatelaboratoryandindustrialtestresults AT daolinwang designandapplicationofrapiddewateringfortailingscontainingsodiumsilicatelaboratoryandindustrialtestresults AT chongchunxiao designandapplicationofrapiddewateringfortailingscontainingsodiumsilicatelaboratoryandindustrialtestresults |