Prospect Resources has reported positive ongoing metallurgical test results from its Mumbezhi Project in Zambia, confirming the project’s robust, scalable potential and supporting the development of a centralised processing hub.

High-grade copper concentrates with strong recoveries have been produced from several mineralised zones, all meeting or exceeding industry standards.

In the latest round of test work:

• Kabikupa fresh composite returned a 27.5% copper concentrate and 310 ppm cobalt, with a 95.3% copper recovery after just one cleaning stage.
• Nyungu Central fresh composite achieved a 24.6% copper and 0.9% cobalt concentrate, with an excellent 96.2% copper recovery, also after one cleaning stage.
• Nyungu Central transition composite produced a 32.1% copper and 9.1% cobalt concentrate, with 81.4% copper recovery after two cleaning stages.

All composites performed well with a coarse primary grind size (P80 of 250µm), a positive outcome for lowering future plant capital and operating costs.

A standard flotation process was used across all samples and proved effective for both Kabikupa and Nyungu Central materials. This supports Prospect’s strategy of developing a single, centralised processing plant for the broader Mumbezhi Project area.

Mineralogical analysis confirmed that copper was consistently found in chalcopyrite, allowing for reliable predictive processing techniques and results.

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In addition, preliminary gold values in Nyungu Central transition materials suggest scope for payable by-product credits, enhancing future concentrate value. 

Prospect’s Managing Director and CEO, Sam Hosack, commented:

“These results come soon after the announcement of additional exploration success at Nyungu Central and show that Mumbezhi mineralisation has a conventional processing profile, with copper ores that can be treated using simple, low-cost processing methods, as implemented at both Lumwana and Sentinel Mines.

“With high copper recovery and concentrate grades, we’re increasingly confident that Mumbezhi can deliver strong economic returns as the project progresses. The potential for gold at Nyungu Central also adds value, and a broader gold assessment across the license is now underway,” said Hosack.

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“Recent Nyungu Central test work, covering both fresh and transition materials, has delivered much better results than those achieved by the previous operator, Argonaut.

“Importantly, our first Kabikupa flotation tests on fresh materials showed excellent metallurgical results using the same conventional process as recent Nyungu Central tests.”