This article summarizes the mineral processing and metallurgical testing sections of the Preliminary Economic Assessment (PEA) for the Thierry Cu-Ni-PGE Deposit, located in the Pickle Lake area of north-western Ontario, Canada.
Report context
The Thierry Project Technical Report (PEA) was prepared as a NI 43-101 compliant Preliminary Economic Assessment with an effective date of January 21, 2021, and a signing date of February 22, 2021. The report describes the Thierry Cu-Ni-PGE deposit located at 51°29’51.32” N 90°20’52.45” W in the Patricia Mining District, north-western Ontario. This article focuses on the processing-related content of the report, including metallurgical testwork and recovery methods.
Processing route
General
The processing information in the report (Section 13.0) is organized under three main headings: general metallurgical testing, pre-2005 testwork, and 2005-2006 testwork. The report also includes a section on metallurgical performance estimates and a later section (17.0) describing recovery methods including plant feed handling, grinding, flotation, concentrate handling, and tailings/water management.
Pre-2005 Metallurgical Testwork
The report documents that metallurgical testwork was conducted prior to 2005, though specific details in the provided extract are limited. This earlier testing is referenced as part of the historical process development for the Thierry project.
Metallurgical Testwork 2005-2006
A more detailed testwork program was completed during 2005-2006, with results summarized under the following sub-sections:
Samples: Specific sample materials were selected for the test program, with details provided in the report under the samples sub-section.
Grinding: Grinding testwork was performed as part of the program, with results outlined in the corresponding sub-section.
Flotation: Flotation testing was conducted to evaluate the process performance, with findings described in the flotation sub-section.
The 2005-2006 testwork forms the basis for the metallurgical performance estimates presented later in the report.
Metallurgical Performance Estimates
Using the results from the 2005-2006 testwork, the report presents metallurgical performance estimates (section 13.4). These estimates were used to support the process design and the recovery methods described in Section 17.0.
Recovery Methods
Section 17.0 of the report describes the proposed recovery methods under these headings:
Mineralized Plant Feed Handling: The proposed approach for handling mineralized feed to the plant.
Grinding: The proposed grinding circuit design.
Flotation: The proposed flotation process.
Concentrate Handling: The proposed approach for concentrate handling.
Tailings and Water Management: The proposed tailings and water management system.
These recovery methods are described as proposed design based on the metallurgical testwork, distinguishing them from historical operating data from prior operations at the site.
Key reported parameters
The table below summarizes the key metallurgical and process parameters reported in the source document. Where the report distinguishes design from testwork or historical data, this is noted in the basis column.
| Parameter | Value/Description | Basis |
|---|---|---|
| Metallurgical testwork periods | Pre-2005; 2005-2006 | Historical testwork |
| 2005-2006 testwork scope | Sampling, grinding, flotation | Testwork |
| Metallurgical performance estimates | Provided in Section 13.4 | Testwork-based |
| Recovery methods | Plant feed handling, grinding, flotation, concentrate handling, tailings/water | Proposed design |
| Grinding circuit | Described in Sections 13.3.3 and 17.2 | Testwork/design |
| Flotation process | Described in Sections 13.3.4 and 17.3 | Testwork/design |
| Concentrate handling | Described in Section 17.4 | Proposed design |
| Tailings/water management | Described in Section 17.5 | Proposed design |
Project website: https://www.newsfilecorp.com/release/71007/Braveheart-Resources-Commences-PEA-on-Thierry-Mine-Project
Note: The report does not provide numeric recovery values or equipment specifications in the sections extracted for this article. Such details would be found in the full report.
Technical qualifications
The following limitations apply to the information presented in this article, as specified in the original report:
- The processing information in this article is drawn from the PEA, which is a preliminary economic assessment. As stated in the report, a PEA is considered preliminary in nature and may include inferred mineral resources that are considered too speculative geologically to have economic considerations applied to them.
- The metallurgical performance estimates are based on the 2005-2006 testwork program. The report notes that a large portion of the processing data predates 2005, and the 2005-2006 testwork was conducted to update earlier findings.
- The recovery methods described in Section 17.0 are proposed designs based on testwork, not actual operating data from a currently operating plant.
- The report distinguishes between historical operating data (which is referenced but not detailed in the extracted sections) and the 2005-2006 testwork. Readers should be aware that historical operating performance may not be representative of future performance.
- The source report contains no information on current project status, ownership, or economic viability in the sections used for this article; only the processing and metallurgical content is addressed here.
Source: Thierry Project , 2021 Technical Report (PEA), Report No. 391, Braveheart Resources Inc., effective date January 21, 2021, signing date February 22, 2021, Sections 13.0 and 17.0.
