This report presents a Mineral Resource Estimate, Preliminary Economic Assessment, and NI 43-101 Technical Report for the Lac Jeannine Fe Tailings Project in Québec, Canada, with an effective date of March 19th, 2024.
Report context
This technical report was prepared for CoTec Holdings Corp. and documents the Mineral Resource Estimate, Preliminary Economic Assessment, and NI 43-101 Technical Report for the Lac Jeannine Fe Tailings Project located in Québec, Canada. The report has an effective date of March 19th, 2024, and a signature date of August 5th, 2024. The project concerns iron ore tailings deposited at the former Lac Jeannine iron mine site.
Processing route
Metallurgical Testing History
Metallurgical testing for the project has been conducted through multiple programs over an extended period. The report documents four principal test programs, each contributing to the understanding of the tailings material's processing characteristics.
2007 Process Research Associates Ltd. Test Program
The 2007 test program conducted by Process Research Associates Ltd. included quantitative mineralogical analysis, gravity separation testing, and magnetic separation testing. This early program established baseline mineralogical and separation characteristics of the tailings material.
2015 COREM Test Program
The 2015 program conducted by COREM included both quantitative and qualitative mineralogical analysis. This work expanded the mineralogical understanding of the tailings, identifying the principal iron-bearing minerals and their associations.
2023 COREM Test Program
The 2023 COREM test program included quantitative mineralogical analysis. This program provided updated mineralogical data on the tailings material.
2024 COREM Test Program
The 2024 COREM test program was the most recent testing campaign, focusing on head analysis and size distribution. This work characterized the feed material to the proposed processing plant.
Design Basis and Process Design Criteria
The report establishes a design basis and process design criteria for the recovery methods. The processing routes comprise multiple circuits designed to handle the variable particle size distribution of the tailings material.
Process Flowsheet and Mass Balance
The process flowsheet and mass balance are documented in the report. The flowsheet is configured to account for the feed characteristics of the tailings material.
Impact of Concentrate Grade on Recoveries and Weight Yields
The report notes the relationship between concentrate grade, recoveries, and weight yields, which is a consideration in determining the processing configuration.
Description of Processing Plant Facilities
The processing plant facilities are described in the report with the following subheadings:
Feed Preparation
The feed preparation circuit is designed to receive the tailings material and prepare it for downstream processing.
Coarse and Intermediate Circuit
The coarse and intermediate circuit handles the coarser fractions of the tailings material.
Fines Circuits
The fines circuits are designed to process the finer fractions of the tailings material.
Regrind Mill and Spirals
A regrind mill and spiral circuit is included in the processing route.
Concentrate Dewatering and Load-Out
The concentrate dewatering and load-out section handles final concentrate handling.
Tailings Pumping
The tailings pumping system is designed to transport final tailings material.
Utilities and Service Area
The utilities and service area provides supporting infrastructure for the processing plant.
Key reported parameters
| Parameter | Value | Basis |
|---|---|---|
| Report effective date | March 19th, 2024 | Report document control |
| Report signature date | August 5th, 2024 | Report document control |
| Project location | Québec, Canada | Report document control |
| Metallurgical test programs | 2007, 2015, 2023, 2024 | Section 13, Mineral Processing and Metallurgical Testing |
| Test laboratories | Process Research Associates Ltd.; COREM | Section 13, Mineral Processing and Metallurgical Testing |
| Test program elements | Quantitative mineralogy, qualitative mineralogy, gravity separation, magnetic separation, head analysis, size distribution | Section 13, Mineral Processing and Metallurgical Testing |
| Processing circuits | Feed preparation; coarse and intermediate; fines; regrind mill and spirals; concentrate dewatering and load-out; tailings pumping; utilities and service area | Section 17, Recovery Methods |
Technical qualifications
The report includes specific limitations that should be considered when reviewing the processing information. The technical report notes limitations in Section 2.6 that apply to the overall document. The metallurgical testwork reported in Section 13 represents test program results that may not be directly scalable to full-scale production without further engineering. The processing information contained in this article shows the report content only; no additional operational or economic details beyond those presented in the original technical report are available. The report distinguishes between proposed design, historical operating data, and testwork, and this distinction is preserved in the processing information presented above.
Source: Mineral Resource Estimate, Preliminary Economic Assessment and NI 43-101 Technical Report for CoTec's Lac Jeannine Fe Tailings Project, Québec, Canada, effective March 19th, 2024, signed August 5th, 2024, Sections 13 and 17, and relevant subsections.
