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Modec Connect Solution Turning the valve on innovation From fabrication to full-scale construction, Murchison Mining Services delivers exceptional results Varnish removal made easy Ensuring cleanliness in bulk lube and oils Elevate your dust collection Screening solutions for Australian mining From undetected to accountable: The future of collision avoidance Precision Engineering Exactly what you need, when you need it. Celebrating 20 years since the installation of Gekko’s innovative processing plant at the Ballarat Gold Mine Strength in Service: JTH’s Edge in Asset Management Forged in Excellence Mine-spec vehicles. Built tough.  Global Resources Innovation Expo 2025 Torque, grit and diesel Bull Motor Bodies: Innovating Fleet Solutions for Australian’s Hardest Working Vehicles Perth Fork Trucks Transmission repairs and replacements made easy When failure is not an option Gold, gold, gold. Measuring ore grade on conveyors. Conception to delivery to operations UQ strengthens mining education Toughness You Can Trust Smarter Mining In 2025 Precision In Practice Powering a greener future Mining Matters Ford Ranger Super Duty: Built Mine Tough Revolutionising exploration’s core Pioneering innovation for over 50 years Wastewater, reinvented Right people. Right gear. Smart solutions. Unlock smarter decisions with precision borehole imaging Engineering extraction Bus 4×4 hire: Australia’s leading 4×4 bus hire company GMEK: Modelling a Better Future in Mining and Beyond Strength in structure Titeline Drilling Sustainability is in Aquapax’s DNA Wet and dry hire done right  The rise of  Vanadium flow batteries Fenix rising  Powering the future of metallurgical coal  Opportunities in India’s mining sector AusIMM host historic Underground Operators 2025 Conference LHS Rocktools Australia DM Plastics and Steel: Innovative and sustainable poly pipe solutions Murchison gears up for 2025 Sustainable Mining Innovation Swinging without compromise Make mine a combination Diesel Jetters Cut Costs The hidden costs of neglecting slurry pump maintenance Australia’s largest ever salt project receives green light Golden Victory Vanadium: from zero to hero

Engineering extraction

Engineering extraction

Boosting efficiency in mineral processing

ProMin Engineering, in collaboration with JT Metallurgy and Artemis Engineering, have transformed plans into a golden opportunity with their detailed design for the refurbishment and upgrade of the Meeka Metals-owned Andy Well gold mine process plant. This project marks a significant milestone in revitalising the Andy Well site, which had been in care and maintenance since 2017. 

Following Meeka Metals’ acquisition of the Andy Well site, the previous owners had dismantled the ~350ktpa Gravity/CIP plant to upgrade another asset. The grinding, gold extraction and cyanide circuit were entirely removed, including other key equipment such as the second crusher. 

Bringing the Andy Well process plant back online saw Meeka Metals engage JT Metallurgy and ProMin Engineering to conduct a Feasibility Study (FS) on the process plant refurbishment. Completed in mid-2024, the FS focused on treating ore from the St Annes and Turnberry deposits, with the potential inclusion of ore from the previously mined Andy Well underground mine. The goal was to upgrade the process plant to a 500ktpa capacity. 

ProMin Engineering, with the assistance of JT Metallurgy and Artemis Engineering, transitioned from FS into the detailed design, which included a new secondary crusher, a new grinding circuit, an upgraded leach circuit, and a new gold extraction circuit. 

A collaborative effort between JT and ProMin in the identification and site inspection proved to be a key achievement,” said ProMin Engineering Director, Mark Leslie. 

“The subsequent acquisition of an Outotec 750kW Ø 2.85m x 4.5m ball mill from the Bendigo Gold mine significantly reduced costs and accelerated the project timeline.” 

The detailed design for the refurbishment included a complete redesign of the grinding circuit, with the installation of a hydrocyclone cluster operating in a closed circuit. The new grinding facility was designed to integrate seamlessly with the existing mill feed conveyor and CIL tanks, assisted by a site-wide laser scan at the commencement of the work. 

The CIP circuit was expanded with a new 600m³ leach tank and a 600m³ common adsorption tank installed in front of the existing circuit. An eighth 145m³ adsorption tank was installed, allowing the adsorption circuit to operate as two trains of four tanks, which ensured the existing inter-tank screens were suitable. 

The project also involved replacing the gold extraction and cyanide storage circuits. The gold extraction process was upgraded from a 1t AARL to a 1.5t Pressure Zadra circuit. 

“Our comprehensive approach, combined with the expertise of JT and Artemis, has positioned the Andy Well process plant for successful commissioning and gold production,” added Mr Leslie. 

“This project underscores ProMin’s commitment to delivering innovative and cost-effective solutions in the mining sector.”