EMP Metals has completed construction of its Project Aurora lithium brine demonstration plant in Saskatchewan and begun processing live production brine as integrated commissioning advances towards a third quarter start.
The facility is located within the company’s Viewfield project area and is connected directly to a production well and a waste brine disposal well. This allows raw brine to enter the process continuously while treated brine is returned underground.
Construction and supporting field infrastructure are complete, according to the company. Overall commissioning is approximately 50% finished, with several major operating systems already handling live material.
The waste brine disposal system is operational and injecting into the targeted formation. Raw brine delivery is progressing towards continuous steady state operation as individual plant systems are integrated.
Project Aurora is designed to process 10 cubic metres of brine per day from the wellhead through to lithium chemicals. That rate is far below commercial production, but it is sufficient to test the process as an interconnected plant rather than as a collection of laboratory experiments.
The distinction is important for direct lithium extraction. A separation method may perform successfully on selected samples while encountering different behaviour when exposed continuously to variable field brine, equipment fouling, pump performance, reagent control, and the accumulation of impurities.
Operating at the wellhead gives EMP access to fresh brine under conditions closer to those expected in commercial production. It also allows the company to test how extraction, purification, concentration, conversion, and disposal systems interact over extended periods.
The demonstration campaign is intended to validate process performance and optimise operating parameters. It will also generate engineering and economic data for a potential modular commercial facility.
Those data will need to cover more than lithium recovery. Reagent consumption, water use, energy demand, equipment availability, filter performance, maintenance, waste streams, and the quality of the final lithium product will all affect whether the process can operate economically.
Brine composition may also change over time or between wells. A robust process must tolerate variation without requiring constant manual intervention or producing off specification output.
EMP describes Saskatchewan’s brine as being free of hydrogen sulphide and oil derived organic material. If confirmed consistently during operation, that composition could simplify parts of the treatment process compared with brines containing contaminants that interfere with separation equipment.
Favourable chemistry does not remove the wider engineering challenge. Lithium concentrations, competing ions, temperature, pressure, and flow conditions still determine the size and operating cost of the extraction system.
The company’s demonstration plant uses a continuous flow configuration rather than a batch only arrangement. Continuous operation is more representative of a commercial plant but introduces additional control requirements.
Flow rates, pressures, concentrations, chemical dosing, and residence times must remain within operating limits as upstream and downstream conditions change. A disruption in one process stage can affect the complete chain.
Commissioning therefore proceeds system by system before the plant reaches steady operation. Pumps, vessels, instruments, controls, piping, treatment units, and safety systems must first be checked individually and then tested as an integrated process.
Live brine increases the value of the commissioning exercise because the process is exposed to real material. It also increases risk compared with testing using water or substitute fluids, particularly where scaling, corrosion, precipitation, or chemical reactions may occur.
The company expects demonstration operations to begin during the third quarter of 2026. Reaching start up will not complete the programme; it will begin the longer task of gathering enough operating information to determine whether results are repeatable.
EMP intends the data to support a modular commercial facility capable of producing more than 3,000 tonnes of lithium products annually. Modular development can allow capacity to be added in stages rather than committing immediately to a single large plant.
That approach may reduce initial capital exposure and allow engineering changes between modules. It can also sacrifice some economies of scale and create duplicated equipment or infrastructure if the modules are not designed around shared utilities and processing stages.
Commercialisation will depend on whether the demonstration equipment can be scaled without changing the physical and chemical conditions that determine extraction performance. Processes that work at small flow rates can behave differently when vessels, piping, filtration areas, and control loops become larger.
Project economics will also be shaped by lithium prices and product specifications. A technically successful extraction system may still struggle commercially if reagent and energy consumption remain high or if additional refining is required to reach battery grade standards.
The Saskatchewan location offers established infrastructure and comparatively shallow drilling, according to EMP. Existing wells and disposal formations could reduce some development requirements compared with remote hard rock projects.
Using subsurface brine also avoids conventional open pit mining and large evaporation ponds, but it does not make the project impact free. Well integrity, water management, chemical use, energy consumption, disposal performance, and long term reservoir behaviour all require monitoring.
Completion of construction is therefore a meaningful milestone rather than evidence of commercial viability. Project Aurora has moved from drawings, fabricated equipment, and field installation into the stage where actual brine will expose weak assumptions.
The demonstration plant’s most valuable initial output may be neither lithium nor a polished process diagram, but operating data showing where the system works, where it loses efficiency, and what must change before several thousand tonnes a year can be treated as an engineering target rather than a promotional one.
