One of the world’s largest gold mining companies operating in Australia sought a means to improve air cylinder operation for the dart valves in their flotation cells. They installed new air servo cylinder technology from SMC Corporation and achieved numerous benefits. Chief among them was an increase in product recovery.
This air servo cylinder series IN-777 has enabled the reduction and removal of pinch points, resulting in improved safety. It has also yielded time saving during calibration and improved positioning, delivering increased froth velocity for the enhanced gold and copper recovery. “The optimised speed capability of the IN-777 means that it responds quickly to changes in process conditions, maintaining a constant froth velocity,” explains Vince Marcucci, Global Accounts Manager in the Resources Sector for SMC Corporation ANZ.
The IN-777 in action
The IN-777 air servo cylinder is designed for rugged mining applications in mineral processing, and bears IP67 rating (full protection against dust and water). It is predominately used in concentrators, specifically for flotation cells, designed to recover valuable commodities such as nickel, zinc, lead, gold, copper, silver, molybdenum and phosphate.
“The recovery process is achieved through froth,” explains Vince. “A bond forms between the minerals and the bubbles created during the aeration, agitation, and introduction of specific chemicals to the pulp. The minerals adhere to the bubbles (froth) which float to the top of the cell and cascades over into the ‘Concentrate Launder’.”
The IN-777 features HART Communication protocol, allowing for integration with mining communication systems, for enhanced control, feedback and diagnostics. “In addition, this cylinder delivers high positioning repeatability of 0.5 mm, providing accurate level control for maximum froth velocity, and adjustable speed control levels”. With one-touch stroke calibration, LED diagnostics and fail-safe ports, the IN-777 is favoured for its low-maintenance operation.
“SMC is pleased with the outcome of these installations and is proud to partner with the mining industry to increase their extraction rates and improve efficiencies” concludes Marcucci.
