2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 2: Mineral Processing
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 446 pages |
| ISBN: | 978-1-987820-04-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
RECOVERY CARBON MATTER FROM COAL TAILINGS DAMS
Irineu A.S. de Brum1; Gorki Brandt Gonzalez da Vila1; Jeremias C. B. de Azambuja1; Pedro M. Zancan1;1UFRGS, Porto Alegre, Brazil;
Type of Paper: Regular
Id Paper: 199
Topic: 2
Abstract:
Brazil has large reserves of coal (30 billion tons) located predominantly in the south of the country. Despite the relative ease of exploitation, these resources have been underestimated as a source of energy. Currently, the country's strategic planning aims to minimize the gap between coal and resources traditionally used in the Brazilian energy matrix. In this scenario, the processing of Brazilian coal in columns flotation appears as a promising alternative, having been successful in mineral systems containing fine particles. This paper aims to study the overall process of column flotation for a specific Brazilian coal.
The sample used for this study is a material deposited in the tailings dam of the coal mine "Carbonifera Criciuma", located in the south of Brazil. Usually, the coal fines, along with the mineral part from the beneficiation process are called "sludge", are discarded as waste and deposited in the tailings pond. The recovery of coal fines can facilitate the obtainment of a concentrate that could be used as fuel in power generation. It can also contribute as a factor of environmental impact reduction by minimizing the formation of acid mine drainage (AMD), generated by the sulfur contained in the material under study, in addition to reducing the physical space occupied by the tailings dam. Among the methods coal beneficiation, flotation stands out as one of the most important concentration process, particularly in the treatment of fine particles. The characterization allowed us to define that we are working with a material 83% lower than 0,710 mm. The results showed that, from a feed with around 63% of ash content, we can get a concentrate with 30% of ash content and 40% of carbonaceous mass recoveries.