South Crofty PEA Update

Executive Summary

This Pre-Feasibility Study (PEA) Update for the South Crofty Project by Cornish Metals Inc. outlines a modernized processing flowsheet designed to recover Tin (Sn) from underground ore. The design leverages historical performance data from the Wheal Jane mill (1994-1998) while incorporating new technologies such as XRT ore sorting and Inline Pressure Jigs (IPJ) to improve efficiency and recovery rates. The plant is designed to handle a head grade of 0.94% Sn with a target overall recovery of 87.13%.

The processing circuit begins with underground primary crushing followed by surface pre-concentration using XRT sorting and IPJ separation to reject waste material early. The remaining material undergoes grinding via rod and ball mills, followed by a multi-stage gravity concentration process utilizing spirals, shaking tables, hydrosizers, MGS units, and Falcon concentrators. An optional polymetallic flotation circuit for Copper and Zinc is included, along with a Tin Dressing flotation stage to remove sulphides from the final concentrate.

The plant is designed for an annual throughput of 500,000 tonnes per annum (tpa) with a final concentrate grade of approximately 55% Sn. The operation is planned for 357 days per year with high availability in the concentrator section. The flowsheet aims to produce approximately 200 tonnes of high-grade concentrate per week, with tailings suitable for cemented backfill underground.

Reports

Entities

Concepts

Website: https://cornishmetals.com/project/uk/south-crofty-tin-project/

Report Date: 2025

Region: Cornwall, UK

Project Status: Development (PEA)

Commodity: Tin

Throughput: 500,000 tpa

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