| Company | Not Specified |
| Date | June 2025 |
| Commodities | Gold |
| Throughput | 9,500,000 t/y |
| Status | Development |
Executive Summary
The Tower Gold Project Preliminary Economic Assessment outlines a conventional gold recovery flowsheet designed to treat approximately 9.5 million tonnes per annum of fresh rock. The process plant design leverages industry-standard unit operations and metallurgical testwork to optimize gold recovery while minimizing operating costs. Key design criteria include a nominal daily throughput of 26,027 tonnes, a target grind size of P80 75 µm, and an overall gold recovery rate of 92.7%.
The flowsheet incorporates primary crushing, grinding, and classification followed by cyanide leaching and gold adsorption via a carbon-in-pulp (CIP) circuit. The leach-CIP circuit utilizes pre-oxidation followed by leach tanks and a CIP carousel to maximize recovery. Post-leach tailings undergo cyanide destruction using SO2/O2 technology to ensure WAD cyanide levels remain below 1 ppm prior to deposition. The design emphasizes operational reliability with 92% availability for the process plant circuits and includes automated process control systems.
This technical report section details the process design criteria, equipment selection, and layout configurations intended to support the economic viability of the project. The proposed infrastructure aligns with best practices for gold processing, ensuring consistent slurry density and flow through pre-leach thickening and robust tailings management systems.
Website: https://stllrgold.com/
Report Date: June 2025
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Project Status: Development
Commodity: Gold
Throughput: 9,500,000 t/y
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Technical report and processing history
The following archived source profiles have been consolidated here to preserve the project’s processing history and study context.
Tower Gold Project — 2025 Preliminary Economic Assessment
Tower Gold Project — 2025 Preliminary Economic Assessment
| Company | Unknown |
| Mine | Tower Gold Project |
| Date | 2025 |
Executive Summary
The 2025 Preliminary Economic Assessment for the Tower Gold Project outlines a robust conventional gold recovery flowsheet designed to process approximately 9.5 million tonnes per annum of fresh rock. The project leverages metallurgical testwork to optimize gold recovery through a circuit that includes primary crushing, grinding to a P80 of 75 µm, and a specialized leach-CIP configuration.
The processing facility is engineered for high operational availability, utilizing a pre-leach thickener for slurry consistency and a dedicated cyanide destruction circuit using SO2/O2 technology to ensure environmental compliance. With a nominal throughput of 26,027 tonnes per day and an overall gold recovery rate of 92.7%, the project is positioned to align with industry-standard best practices for gold processing and economic development.
Website: https://stllrgold.com/news/stllr-gold-commences-tower-gold-project-environmental-baseline-studies
Report Date: 2025
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Tower Gold Project — 2025 Technical Report
Tower Gold Project — 2025 Technical Report
| Company | Not Specified |
| Date | June 2025 |
| Commodities | Gold |
Executive Summary
The Tower Gold Project Preliminary Economic Assessment outlines a conventional gold recovery flowsheet designed to treat 9.5 million tonnes per annum of fresh rock. The process plant integrates industry-standard unit operations including primary crushing, grinding, cyanide leaching, and carbon-in-pulp (CIP) recovery to achieve a nominal overall gold recovery of 92.7% against a head grade of 0.91 g/t. The design aims to optimize gold recovery and minimize operating costs, leveraging metallurgical testwork results and proven engineering practices applicable to similar gold processing operations.
The flowsheet includes pre-oxidation followed by leach tanks and a CIP carousel designed to maximize gold recovery and produce loaded carbon for the elution circuit. Post-leach tailings are treated through a cyanide destruction circuit using SO2/O2 technology prior to deposition in the tailings storage facility, ensuring weak acid dissociable (WAD) cyanide levels below 1 ppm. The plant is designed with high availability targets for grinding, leaching, and recovery circuits, supported by standby equipment and automated process control systems.
This technical report provides the engineering basis for the project’s economic viability, aligning metallurgical testwork results with proven processing practices suitable for similar gold operations. The design reflects best practices for gold processing and supports the overall economic viability of the Project.
Website: https://stllrgold.com/
Report Date: June 2025
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Commodity: Gold
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Tower Gold Project — 2022 Technical Report
Tower Gold Project — 2022 Technical Report
| Company | Tower Gold |
| Date | 2022 |
| Region | Not Specified |
| Commodities | Gold |
Executive Summary
This NI 43-101 Technical Report and Preliminary Economic Assessment outlines the recovery methods for the Tower Gold Project, specifically designed to process the Garrison and Golden Highway deposits. The process design utilizes standard gold processing technologies, including a two-stage crushing circuit, a Semi-Autogenous Grinding (SAG) mill followed by a ball mill in a SAB configuration, and a gravity recovery circuit. The plant is designed for a throughput of 19,178 tonnes per day with a total annual milled material of 7,000,000 tonnes.
The metallurgical flowsheet incorporates gravity concentration using semi-batch centrifugal concentrators to recover free gold, which is then treated in an Intensive Leach Reactor (ILR). The main leaching circuit employs Carbon-in-Leach (CIL) technology with a total residence time of 24 hours. Gold is recovered from the loaded carbon via Pressure Zadra elution, followed by electrowinning and smelting to produce doré bars. The design includes comprehensive reagent handling, cyanide detoxification using the SO2/air process, and a paste plant for underground backfill.
Operational criteria indicate a mill availability of 92% and a crushing plant availability of 70%. The process includes specific targets for dissolved oxygen, cyanide consumption, and pH control to optimize recovery. Tailings are treated for cyanide destruction before disposal, with a portion utilized in a paste backfill system for underground support. The report provides detailed consumption rates for reagents and wear parts, supporting the economic assessment of the project.
Reports
- entities/Tower_Gold_Project
Website: https://stllrgold.com/
Report Date: 2022
Region: Not Specified
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Commodity: Gold
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