EV Resources Advances Antimony Production with Flotation Circuit Commissioning at Tecomatlán Plant

Flotation Circuit Commissioning Marks Major Progress in EVR's Development Plan

EV Resources has achieved a significant operational milestone by commissioning and dry testing the flotation circuit at its Tecomatlán Processing Plant in Puebla, Mexico. The flotation cells have been assembled, refurbished, and commissioned, with the company confirming the circuit operates as intended and is ready for the next commissioning phase. This development advances EVR's staged strategy to build its antimony production capability, following prior progress on other key processing circuits at the facility.

The flotation circuit represents the final stage in EVR's processing flowsheet, designed to produce marketable antimony concentrate from ore sourced at the Los Lirios project and the nearby Chinantla project, under a non-binding memorandum of understanding supply agreement. Successfully commissioning this circuit confirms that the major processing components are sufficiently advanced to proceed with an operational proof-of-concept campaign, aligning with the company’s capital-efficient development approach.

200-Tonne Bulk Sample Campaign to Deliver Vital Operational Insights

EVR is set to process a 200-tonne bulk sample from the Chinantla Antimony Project through the crushing, grinding, and flotation circuits. This proof-of-concept campaign aims to demonstrate operational capability at each stage, validate the flowsheet under real conditions, and reduce risks on the path to commercial production. Unlike conventional laboratory metallurgical tests, this campaign provides the first operational demonstration of EVR’s processing flowsheet using bulk ore during staged commissioning, generating valuable engineering, metallurgical, and operational data.

The campaign is structured to optimize operational parameters and produce EVR’s first marketable antimony concentrate, validating plant capability. Successful completion will confirm processing plant performance, deliver a saleable concentrate for customer evaluation, verify metallurgical recoveries and concentrate quality, identify process optimization opportunities, and further de-risk the route to commercial antimony production. This phased approach reflects EVR’s strategy to validate each major processing stage before full plant integration.

Metallurgical Testing Confirms 81% Antimony Recovery via Flotation

Recent metallurgical test work has validated flotation as the preferred processing method for antimony extraction, achieving approximately 81.1% recovery and producing a commercial-grade concentrate. These results, announced on 24 June 2026 in the update titled "Flotation Test Work Delivers 81% Antimony Recovery," provide strong technical support for EVR’s processing strategy.

The findings demonstrate that EVR’s flowsheet can achieve commercially viable recoveries and produce market-ready concentrate. The 81.1% recovery rate and concentrate quality underpin the technical foundation at the Tecomatlán facility. Successful dry testing of flotation hardware now enables the next phase of operational validation with bulk ore.

Los Lirios Project and Strategic Role in Critical Minerals Supply

EV Resources’ flagship asset, the Los Lirios Antimony Project in Mexico, is 70% owned by the company and located about 50 kilometres from the Tecomatlán Processing Plant. The high-grade antimony resource is undergoing exploration to define the extent of the mineralised caldera resurgence dome (CRD) system. EVR is advancing toward a maiden JORC Mineral Resource estimate while developing processing infrastructure to treat ore from this deposit.

This integrated development of resource and processing infrastructure supports EVR’s goal of becoming a near-term antimony producer supplying Western markets. Antimony is a critical mineral essential for supply chain security. EVR’s parallel progress in operational capability at Tecomatlán and resource definition at Los Lirios accelerates the path to commercial production. Additionally, EVR holds 100% ownership of the Dollar and Milton antimony projects in Nevada, supporting US critical minerals initiatives and domestic supply.

Capital-Efficient Development and Commercial Production Outlook

EVR’s development strategy emphasizes capital efficiency by refurbishing and upgrading the existing Tecomatlán Processing Plant infrastructure rather than building a new facility. This approach aims to accelerate cash flow, reduce development risk, and minimize upfront capital expenditure compared to greenfield projects. By progressively commissioning existing infrastructure, EVR positions itself to advance toward commercial antimony production while maintaining financial discipline and operational flexibility.

The company plans to process third-party antimony ore at Tecomatlán before production from Los Lirios begins, providing interim revenue. The non-binding memorandum of understanding with the Chinantla project offers near-term ore supply for the proof-of-concept campaign and potential early commercial operations. Executive Chairman Shane Menere commented: "The successful commissioning and dry testing of our flotation circuit marks another important milestone in EVR's staged pathway towards antimony production. Our objective is to progressively prove the operational capability of each major processing stage before completing full plant integration. This next campaign is expected to demonstrate that the crushing, grinding and flotation circuits can operate together to produce EVR's first marketable antimony concentrate, while generating the operational data needed to support the next stage of plant development."

Tecomatlán Processing Plant Infrastructure and Commissioning Progress

The Tecomatlán Processing Plant in Puebla, Mexico, is an existing antimony facility that EVR is refurbishing and commissioning in stages. This plant is a strategic asset in the company’s low-capital pathway to antimony concentrate production. Utilizing existing infrastructure avoids the high costs of new construction, focusing capital on mechanical refurbishment and commissioning.

Completion of the flotation circuit marks the final major processing stage in the flowsheet. Mechanical refurbishment is largely finished, and the flotation cells operate as designed, ready for the next commissioning phase. This staged approach allows EVR to reduce project risk by validating each processing stage before advancing, supporting full plant integration once the proof-of-concept campaign concludes successfully.

Market Positioning and Offtake Partner Engagement

A primary goal of the 200-tonne bulk sample campaign is to produce EVR’s first marketable antimony concentrate for evaluation by potential offtake partners. Demonstrating the ability to produce and supply commercial-grade concentrate is vital to de-risking the project’s commercial viability. Operational success and product availability will strengthen EVR’s position in negotiations with prospective customers, offtake partners, and financiers as the project moves toward full-scale production.

Producing the initial concentrate also provides practical experience in quality control and product specification, aiding process refinement ahead of commercial operations. Availability of concentrate samples for customer assessment may facilitate discussions on offtake agreements, pricing, and commercial terms critical to financial success at scale.

Investor Focus: Monitoring EVR’s Antimony Production Progress

Investors should closely track the outcomes of the 200-tonne bulk sample campaign, a key validation phase for EVR’s antimony production plan. Important metrics include successful processing through crushing, grinding, and flotation circuits; metallurgical performance under operational conditions compared to lab results; concentrate quality and marketability; and identification of operational challenges or optimization opportunities. Timing of campaign completion and result announcements will also be critical.

Post-campaign, investors should monitor progress toward full plant integration and commercial operations commencement. Additional milestones include updates on the Los Lirios resource estimate, mining permits and development approvals, offtake agreement negotiations, and operational timelines for near-term antimony production. EVR’s ability to execute its staged development strategy with financial discipline will be essential to achieving its objectives.