Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
|
| Processing |
- Flotation
- Dense media separation
|
East Tennessee consists of a processing plant and three underground zinc mines: Young, Coy and Immel. Ore from the three mines is processed into zinc concentrate at the Young mine site. |
| Company | Interest | Ownership |
|
Nyrstar
|
100 %
|
Direct
|
Summary:
East Tennessee Mines are comprised of three operating mines: Coy, Immel and Young, located approximately 30 kilometres north-east of Knoxville, Tennessee. Zinc mineralisation occurs in Mississippi Valley Type (‘MVT’) deposits as open-space fillings of breccias and fractures within limestones and dolomites.
Processing Technologies
- Flotation
- Dense media separation
Summary:
Ore from the three mines is processed into zinc concentrate at the Young mine site. The East Tennessee zinc mine complex has a close association with Nyrstar’s Clarksville smelter.
Recoveries & Grades:
| Commodity | Parameter | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 |
|
Zinc
|
Recovery Rate, %
| 94.7 | 95.1 | 94.3 | 91 | 92 | 94.8 |
|
Zinc
|
Head Grade, %
| ......  | ...... | ...... | ...... | ...... | ...... |
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Reserves at December 31, 2018:
| Category | Tonnage | Commodity | Grade |
|
Proven
|
0.34 Mt
|
Zinc
|
3.3 %
|
|
Probable
|
5.27 Mt
|
Zinc
|
4.4 %
|
|
Proven & Probable
|
5.61 Mt
|
Zinc
|
4.4 %
|
|
Measured
|
0.45 Mt
|
Zinc
|
3.5 %
|
|
Indicated
|
7.04 Mt
|
Zinc
|
4.4 %
|
|
Measured & Indicated
|
7.49 Mt
|
Zinc
|
4.3 %
|
|
Inferred
|
24.41 Mt
|
Zinc
|
3.7 %
|
Operating Costs:
| | Units | 2018 | 2017 | 2016 | 2015 |
|
Direct operating costs ($/t milled)
|
USD
| 38 | 40 | 38 | 42 |
Aerial view:
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