Precious metal refinery

High-quality precious metals refinery equipment

As an experienced global provider of precious metals recovery equipment, we understand there's no substitute for quality and efficiency in the refinery. We provide a variety of high-class refining products, making it simpler to turn gold and silver concentrates, sludge, and precipitates into doré.

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Our precious metals refinery equipment

Once the gravity concentrate, Merrill Crowe precipitate, or electrowinning sludge has been recovered, it is is dried or (when mercury is present) retorted. Smelting then separates the gangue from the gold and silver, which is poured into moulds to produce saleable doré bars. 

Furnaces

We supply electric induction or fuel-fired (gas, diesel) furnaces for smelting gold and silver concentrate.  

Flux mixers and furnace feeders

Available in a range of sizes, our flux mixers ensure thorough mixing of flux and dried concentrate, while our furnace feed conveyors deliver controlled feeding into the smelting furnace. Single and dual furnace feeding is available.  

Air pollution control 

We offer cartridge filters, baghouses, and wet scrubbers for particulate and gas removal, and mercury abatement systems for effective removal of mercury from smelt furnace stack gas and ventilation systems.  

Slag handling and pouring equipment

We offer slag pots and carts, 3500 oz and 5000 oz silver moulds, 1000 oz gold moulds, mould stands, and slag crushing and separating equipment.  

Maintenance & service of our precious metals refinery equipment

Our aftermarket department offers reliable and timely supply of spares and wear parts, ensuring minimal downtime and optimal equipment performance. Our specialists are also readily available to provide ongoing operational support. Whether it’s technical advice, troubleshooting or circuit optimization, we work closely with mine site teams to ensure the longevity and efficiency of the equipment throughout its lifecycle. Additionally, we offer comprehensive support services, including circuit audits, preventive maintenance programs, training for mine operators and maintenance personnel, and detailed reporting on equipment performance. Our goal is to help maximise recovery, minimise downtime, and ensure the safe and efficient operation of your FLS systems and equipment.

Learn more about FLS service centres

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Frequently asked questions

FAQs for precious metals refinery equipment

A precious metals refinery processes and purifies concentrate from upstream recovery processes, such as gravity concentration, electrowinning, or Merrill Crowe-zinc precipitation, to produce a saleable product known as doré bars. 

Precious metals refineries first dry the precious metal concentrate from upstream metal recovery processes. When mercury is present in the concentrate, this takes place in a mercury retort. The dried concentrate is then mixed with fluxes and fed into a smelting furnace. This separates gangue from the purified molten precious metal, which is poured into moulds to produce doré bars for sale.