Mintek Spearheading Rare Earth Elements Recovery From Discard Coal, Fly Ash

Why It Matters

Recovering REEs from coal waste strengthens South Africa’s strategic supply chain while delivering economic and environmental dividends. It also showcases a scalable model for turning mining by‑products into valuable resources.

Key Takeaways

• Mintek targets REEs, vanadium, gallium from coal waste
• New hydrometallurgy process avoids silica clogging
• Project backed by Coaltech funding, supports national strategy
• Converts environmental liability into high‑value minerals
• Creates specialised jobs, boosts local manufacturing

Pulse Analysis

The global race for rare‑earth elements has intensified as wind turbines, electric‑vehicle motors and advanced electronics depend on these critical minerals. South Africa, sitting on vast reserves of coal and its by‑products, now views its discard coal and fly ash not as waste but as a hidden reservoir of REEs, vanadium, gallium and other strategic metals. Mintek’s initiative taps this untapped potential, positioning the country to contribute to the high‑tech supply chain while reducing reliance on imports from traditional producers.

Historically, extracting REEs from coal waste was hampered by silica dissolution, which created gelatinous slurries that clogged processing equipment and caused metal losses. Mintek’s hydrometallurgy division has engineered a novel leaching protocol that isolates silica early in the flow sheet, preserving REE recovery rates and enabling the simultaneous extraction of a broader “basket” of minerals, including titanium and germanium. This technical breakthrough not only improves process efficiency but also lowers operational costs, making large‑scale deployment economically viable.

Beyond the technical merits, the project dovetails with South Africa’s National Critical Minerals & Metals Strategy, aiming to foster local beneficiation and advanced manufacturing. By converting a legacy environmental liability into a source of high‑value products, Mintek creates new specialised jobs, supports skills development, and reduces dust and land contamination near coal sites. The partnership with Coaltech and government backing signals a broader shift toward circular mineral economies, offering a replicable model for other coal‑rich nations seeking sustainable growth and supply‑chain resilience.