| Company | Rosh Pinah Zinc Corporation (RPZC) |
| Mine | Rosh Pinah Mine |
| Date | 2019 |
| Commodities | Lead, Zinc |
Executive Summary
The Rosh Pinah processing plant has been in continuous production since 1969. It utilizes conventional size reduction and mineral beneficiation unit processes to treat ore from the Eastern and Western Orefields. The plant currently treats 0.68 to 0.71 Mtpa, producing approximately 50 to 60 ktpa of zinc concentrate and 4.5 to 7.5 ktpa of lead concentrate.
Recent optimization efforts, including the installation of regrind circuits in 2017, aim to address the harder microquartzite content in Western ore and improve recoveries. Metallurgical test work confirmed the potential for concentrate grade and recovery improvements using an optimized flowsheet with finer primary grind and reduced rougher flotation feed density.
Website: https://www.roshpinahzinc.com/
Report Date: 2019
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Commodity: Lead, Zinc
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Technical report and processing history
The following archived source profiles have been consolidated here to preserve the project’s processing history and study context.
Rosh Pinah Mine — 2018 Technical Report
Rosh Pinah Mine — 2018 Technical Report
| Company | Trevali Mining Corporation |
| Date | May 1, 2018 |
| Region | Namibia |
| Commodities | Zinc, Lead, Silver, Gold |
Executive Summary
This NI 43-101 Technical Report details the recovery methods and production schedule for the Rosh Pinah Mine operated by Trevali Mining Corporation. The mine utilizes an underground mining method to extract sulphide ore containing zinc, lead, silver, and gold. The ore is hauled approximately 4.2 km to an underground crushing station before being conveyed to the surface beneficiation plant. The processing circuit includes crushing, screening, grinding, and a complex flotation circuit designed to produce separate lead and zinc concentrates.
Historical performance data from 2013 to 2017 indicates consistent production with varying grades. The Life of Mine (LOM) schedule projects operations through 2029, with a total milled tonnage of approximately 7.7 million tonnes. The plant processes ore at rates between 140 and 160 tonnes per hour at the primary crusher, feeding a 12 ft by 12 ft ball mill. The flotation circuit employs rougher, cleaner, scavenger, and column cells for both lead and zinc recovery, utilizing reagents such as sodium cyanide, xanthates, and copper sulphate.
The report outlines major consumables and energy requirements for the Life of Mine, highlighting significant usage of grinding balls, copper sulphate, and lime. Production targets include approximately 1,046,000 tonnes of zinc concentrate and 174,000 tonnes of lead concentrate over the LOM period. The concentrates are dewatered via thickeners and belt filters, dried on floors, and dispatched via truck to the port of Luderitz.
Website: https://www.newswire.ca/news-releases/trevali-completes-sale-of-rosh-pinah-mine-881689378.html
Report Date: May 1, 2018
Region: Namibia
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Commodity: Zinc, Lead, Silver, Gold
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