Resumen: Trevali Mining Corporation anuncia la recepción de los informes finales de metalúrgicos de la molienda de 30.000 toneladas de su mina Halfmile 30.000 por la planta de procesamiento Xstrata Brunswick-12. Un informe detallado por el consultor metalúrgico de Trevali, Holland and Holland Consultants, afirma que la mineralización Halfmile exhibe características superiores de flotación y utilizan menos reactivo para producir concentrados de una calidad similar o ligeramente superior a las que tradicionalmente se produce en el Campamento Minero de Bathurst.
Trevali Receives Positive Metallurgical Results From Initial Halfmile Mill Run
Excellent Flotation Characteristics and Good Recoveries Produce Quality Concentrates - Optimal Precious Metal Reporting - Further Optimization Anticipated
VANCOUVER, BRITISH COLUMBIA--(Marketwire - June 13, 2012) - Trevali Mining Corporation ("Trevali" or the "Company") (TSX:TV)(TSX:TV.WT)(OTCQX:TREVF)(LMA:TV)(FRANKFURT:4TI) is pleased to announce receipt of final metallurgical reports following the processing of its maiden Halfmile Mine 30,000-tonne toll-milling run through Xstrata's Brunswick-12 Processing Plant. A detailed report by Trevali's metallurgical consultant, Holland and Holland Consultants, states that Halfmile mineralization exhibits superior flotation characteristics and use less reagent to produce concentrates of similar to slightly superior quality to those traditionally produced in the Bathurst Mining Camp.
The initial 30,000-tonne Halfmile mineral processing run occurred over a 4-day period and the results demonstrate a steady improvement with time as the various processing circuits achieved steady-state and the operators obtained a better understanding of the new mineral type (Table 1 & Figure 1).
| Table 1: Initial Halfmile Concentrate Grades and Recoveries at Brunswick-12 Mill | ||||||||||
| Concentrate | Grades | Recoveries** | ||||||||
| Zn% | Pb% | Cu% | Ag g/t | Au g/t | Zn% | Pb% | Cu% | Ag% | Au% | |
| *Zinc | 53.08 | 2.57% | 0.46% | 80 | 0.26 | 86.16 | - | - | - | - |
| Lead | 4.8% | 45.84 | 0.69% | 681 | 1.61 | - | 58.62 | - | 39.24 | - |
| Copper | 2.78% | 7.42% | 26.64% | 504 | 3.14 | - | - | 62.76 | 7.72 | N/ |
Assays after Xstrata Zinc-Brunswick Mine and SGS Canada Inc. labs.
*Note, the Brunswick-12 processing circuit is designed to produce a Bulk concentrate (low-value product) - minor Bulk concentrate was produced and was of sufficiently low quantity and high quality that it can be blended into the Zinc concentrate to produce a saleable product. **Final run recoveries.
The initial milling run focused on zinc recoveries, Trevali's principal product, which has achieved nameplate recoveries rates over the four-day period. A larger, 40,000-50,000 tonne milling campaign of stockpiled feed is on-track for mid-June and will continue to optimize and establish operating parameters for Halfmile mineralization, specifically zinc regrind and increased by-product recoveries including lead liberation and pyrite suppression studies.
To view Figure 1 please click on the following link:
http://media3.marketwire.com/docs/TVfigure1.pdf
"It goes without saying that we are extremely pleased with the positive metallurgical results from our Halfmile mineralization. Given the complex nature of the mineralization in the Bathurst Camp it is a testament to the world-class skill set and professionalism of Xstrata's Mill team that they could produce such quality concentrates on a new mineral type, over a compressed milling period, utilizing a process flowsheet designed for a different deposit and all this using a mill not optimally-sized for our mineralization," stated Dr. Mark Cruise, Trevali's President and CEO. "Based on these results we are confident that additional metallurgical optimization is possible short-term at Brunswick-12 and more importantly longer-term once we finalize the acquisition of the more suitably-sized and state-of-art Caribou Milling complex."
To view Figure 2 please click on the following link:
http://media3.marketwire.com/docs/TVfigure2.pdf
Fuente: http://tmx.quotemedia.com
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