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Hindustan Zinc Collaborates with Virginia Tech to Improve Silver Recovery Through Advanced Mineral Processing

Hindustan Zinc has signed a Memorandum of Understanding (MoU) with Virginia Tech to conduct advanced research aimed at improving silver recovery from its lead–zinc (Pb–Zn) concentrators. The collaboration will focus on enhancing flotation processes, optimising reagent usage, and strengthening metallurgical efficiency across the company’s processing operations.

Hindustan Zinc, a major integrated producer of zinc and silver, will undertake focused scientific studies with Virginia Tech to improve recovery rates of silver during the ore processing stage. Lead–zinc concentrators are specialised facilities where mined ore undergoes flotation processes to separate and concentrate valuable metals such as lead, zinc, and silver. The partnership will explore improved flotation techniques and the efficient use of reagents—specialised chemicals used to facilitate metal separation—aiming to achieve higher concentrate quality and better plant performance.

Virginia Tech, a globally recognised research university based in Blacksburg, Virginia, is known for its expertise in mining engineering, mineral processing, and applied metallurgy. Through the collaboration, Hindustan Zinc plans to leverage the university’s technical knowledge and research capabilities to strengthen process understanding and enhance operational efficiency at its concentrator plants.

The research will concentrate on building deeper scientific insights to improve silver recovery across Hindustan Zinc’s Pb–Zn concentrators, taking into account both existing plant configurations and the variability expected in future ore deposits. The study will analyse key metallurgical factors affecting flotation selectivity and overall metal recovery, with particular attention to interactions between reagents, minerals, and water, which significantly influence process stability and concentrate quality.

Commenting on the partnership, Arun Misra, CEO of Hindustan Zinc, said that the next phase of growth in the metals and mining industry will be driven by science, innovation, and collaboration. He noted that the collaboration with Virginia Tech represents an important step in strengthening the company’s knowledge ecosystem and preparing its operations for future challenges. By working with leading global research institutions, the company aims to develop capabilities that will support the next generation of mining innovation.

Aaron Noble, Head of the Department of Mining and Minerals Engineering at Virginia Tech, stated that the collaboration reflects how academic research and industry partnerships can generate meaningful impact. He added that working directly with industry enables the university to apply its research on mineral recovery to real-world operational challenges, helping transform scientific discoveries into practical solutions that improve resource efficiency and strengthen the broader mining sector.

The project will also focus on identifying optimised operating strategies and reagent systems to enhance process stability, improve concentrate quality, and deliver more consistent production outcomes. The research findings are expected to contribute to both short-term operational improvements and long-term strategies through laboratory studies, diagnostics, and technical evaluations designed for real-world implementation.

Another key aspect of the collaboration will be knowledge transfer and skill development for Hindustan Zinc’s technical teams. This will include structured workshops, training programmes, and technical exchanges focusing on plant optimisation, reagent strategies, and process improvement.

The partnership aligns with Hindustan Zinc’s broader strategy of strengthening its technological and innovation capabilities through collaborations with leading global institutions. In the past, the company has partnered with organisations such as the Indian Institutes of Technology (IITs), CSIR laboratories, and the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) on projects related to mineral processing, critical metals research, zinc-based battery technologies, and process optimisation. These collaborations have contributed to building strong in-house technical expertise and advancing the company’s vision of becoming a technology-driven and future-ready metals producer.