A newly approved silica quarry west of Tsumeb may appear modest on paper, but it represents a critical link in Namibia’s metals value chain — one that feeds directly into the country’s only copper smelter and one of just five commercial-scale smelters on the African continent.
Three Musketeers Investment (Pty) Ltd has secured environmental clearance to develop Mining Claim 73963 at Farm !Uris No. 481.
From a 17.6-hectare footprint, the company plans to extract between 1,500 and 3,000 tonnes of silica gravel per month, supplying the Sinomine-owned Tsumeb smelter, previously operated for more than a decade by Dundee Precious Metals.
With approval formalised under ECC-105-568-REP-06-D on 2 May 2025, the operation is expected to run for ten years.
The quarry lies just 15 kilometres from Tsumeb, a short haul that sharply reduces transport cost and keeps metallurgy stable inside the smelter — a detail more important than it may sound.
Silica, or SiO₂, is the invisible backbone of furnace chemistry. It binds with waste material to form molten slag, allowing copper to separate cleanly during processing.
When silica is available in consistent quality, furnaces run at lower temperatures, slag remains stable, equipment lasts longer, and blister copper emerges with fewer impurities.
When it isn’t, energy use climbs, slag weakens, and plant economics erode. That is why this quarry matters. It is not a pit of sand — it is smelter insurance.
The Tsumeb smelter, built in the early 1960s, remains Namibia’s oldest continuously operating metallurgical asset.
Linked by rail to Walvis Bay, it processes concentrate from regional mines into 98.5% blister copper for export to refineries in Europe and Asia, while arsenic trioxide — a by-product — meets global demand in the chemical and timber treatment industries.
Without silica, the smelter could continue, but at greater cost, higher temperature and shorter furnace life.
Under the new arrangement, Sinomine expects to employ around ten workers, prioritising Tsumeb residents.
A forest permit will precede clearing of the 17.6-hectare footprint and irrigation on Farm !Uris will continue separately under an existing water-use agreement with Consolidated Copper Corp, owner of the adjacent Tschudi mine.
If all of this sounds routine, the larger context is not. Namibia is stepping into a rapidly expanding global silica market, driven by construction, industrial uses, and growing demand for solar-panel glass.
China, India and the United States lead production by scale — but Namibia is not trying to out-mine giants. Instead, it has something they do not: proximity to smelters and silica-rich deposits with purity ranging from 85% to 99% in some places.
