This technical report presents the mineral processing and metallurgical testing information for the Lac-des-Îles Graphite Quarry in Québec, as of the effective date of December 22, 2021.
Report context
The Technical Report on the Lac-des-Îles Quarry, Québec was prepared for Northern Graphite Corporation under NI 43-101 standards. The effective date of the report is December 22, 2021, with a signature date of February 2, 2022. The report was prepared by SLR Consulting (Canada) Ltd. and Soutex inc. The report covers mineral processing and metallurgical testing (Section 13.0), mineral resource estimates (Section 14.0), mineral reserve estimates (Section 15.0), mining methods (Section 16.0), and recovery methods (Section 17.0).
Processing route
Metallurgical Testing
Section 13.0 of the report documents the metallurgical testing program conducted for the project. Testing was carried out to support the process design and recovery models. The testing program included investigations into the processing characteristics of the graphite mineralization from the Lac-des-Îles Quarry.
Analytical Procedures
Section 13.2 describes the analytical procedures used during metallurgical testing. These procedures were applied to determine graphite grade and other relevant parameters for the samples tested.
Recovery Models
Section 13.3 presents the recovery models developed from the metallurgical testing program. The recovery models were used to estimate graphite recovery performance for the proposed processing operations.
Process Description
Section 17.2 provides the process description for the recovery methods employed at the site. The processing plant is described in terms of its configuration and operating approach for graphite concentration.
Plant Equipment
Section 17.3 documents the plant equipment installed at the Lac-des-Îles processing facility. The equipment listing covers the major unit operations within the concentrator.
Plant Operating History
Section 17.4 presents the plant operating history for the existing processing facility. This section records actual operational data from historical processing campaigns at the site.
LOM Processing Plan
Section 17.5 outlines the life-of-mine (LOM) processing plan. This plan describes the proposed processing strategy for the remaining mineral reserves and resources as of the report effective date.
Mining Methods , Current Operations
Section 16.1 describes the current mining operations at the Lac-des-Îles Quarry. The section covers the extraction methods employed, including drilling and blasting operations (Section 16.5), grade control procedures (Section 16.6), and mining equipment used (Section 16.7). Mine design parameters are presented in Section 16.4.
Pit 2 Reconciliation Practices
Section 15.5 documents the reconciliation practices applied to Pit 2. These practices compare planned production against actual mining results to validate resource and reserve models.
Key reported parameters
| Parameter | Value | Basis |
|---|---|---|
| Report effective date | December 22, 2021 | Documented date |
| Signature date | February 2, 2022 | Documented date |
| Project number | 233.03482.R0000 | SLR project reference |
| Processing sections | Sections 13.0, 14.0, 15.0, 16.0, 17.0 | Report section numbering |
| Metallurgical testing | Section 13.1 | Report documentation |
| Analytical procedures | Section 13.2 | Report documentation |
| Recovery models | Section 13.3 | Report documentation |
| Process description | Section 17.2 | Report documentation |
| Plant equipment | Section 17.3 | Report documentation |
| Plant operating history | Section 17.4 | Historical data |
| LOM processing plan | Section 17.5 | Proposed design |
| Current mining operations | Section 16.1 | Historical/current operations |
| Pit 2 reconciliation | Section 15.5 | Historical practice |
Project website: https://www.northerngraphite.com/mining-overview/
Technical qualifications
This technical report was prepared under NI 43-101 standards for Northern Graphite Corporation. The report was prepared by SLR Consulting (Canada) Ltd. and Soutex inc. The qualified persons responsible for the report include professionals with engineering and geoscience designations. The processing information presented in Sections 13.0 and 17.0 forms the basis for the mineral processing and metallurgical testing documentation. The report does not provide detailed flowsheet specifications, performance guarantees, economic analysis, or current operational status beyond the effective date of December 22, 2021.
Source: Technical Report on the Lac-des-Îles Graphite Quarry, Québec, Report for NI 43-101, Northern Graphite Corporation, SLR Project No: 233.03482.R0000, Effective Date December 22, 2021, Signature Date February 2, 2022.
