RBM Mineral Sands Expansion Extends Rio Tinto’s Zircon and Ilmenite Supply

Rio Tinto Blue Horizon

RBM mineral sands expansion approval gives Rio Tinto a longer supply runway for zircon and ilmenite from its Richards Bay Minerals operation in South Africa. The $473mn Zulti South project is designed to extend mined supply as ore grades and availability decline at the existing Zulti North lease area.

Rio Tinto owns 74pc of Richards Bay Minerals, while Blue Horizon holds 24pc. RBM currently operates four mines in the Zulti North lease area, alongside a mineral separation plant and smelting facility. Construction at Zulti South is expected to begin in the first quarter of 2026 and take around 30 months.

RBM mineral sands expansion is expected to support production from the fourth quarter of 2028. The project aims to extend RBM’s operations to 2050, giving the business a longer-term role in global mineral sands supply.

Zulti South Restarts After Earlier Security and Community Delays

The Zulti South project was originally approved in April 2019, but Rio Tinto later suspended development because of security and community issues. The new approval shows that the company is prepared to move forward after a long delay.

This history matters because mineral sands projects depend not only on geology and capital, but also on stable operating conditions. Community relations, security, permitting, logistics, and site reliability can determine whether high-quality deposits become dependable supply sources.

RBM mineral sands expansion also reflects the need to replace declining ore supply at Zulti North. As mature ore bodies deplete, producers must invest in new mining areas to maintain feedstock availability for separation, smelting, and downstream customers.

Zircon and Ilmenite Supply Supports Industrial and Titanium Markets

Zircon and ilmenite are important industrial minerals with strategic downstream uses. Zircon serves ceramics, refractories, foundry applications, and specialty industrial products. Ilmenite and rutile are key feedstocks for titanium dioxide production, which is widely used in pigments, paints, coatings, plastics, and paper.

Titanium dioxide feedstock also connects the mineral sands market to titanium metal supply chains. While pigment remains the dominant demand driver, titanium-bearing minerals ultimately support industries tied to aerospace, chemicals, energy, and advanced manufacturing.

Rio Tinto’s approval therefore strengthens a long-term feedstock position in a market where mine life, jurisdictional stability, and processing integration matter. The expansion gives RBM a clearer path to remain a major supplier of mineral sands into the middle of the century.

The Metalnomist Commentary

Rio Tinto’s Zulti South approval shows that mineral sands supply security depends on long-cycle mine replacement, not short-term price movements. The strategic value lies in extending zircon and ilmenite availability before mature deposits tighten the feedstock pipeline.