One of the most frequently asked questions at the feasibility study stage of a project is, how big can one go?' This important question effects costing and efficiency of metallurgical equipment, the real estate required and the operating plant strategy._x000D_
The presentation covers both engineering and process considerations and explains the limits that exist today and explores future trends._x000D_
The paper is specific about large slurry application usually found in gold applications; however, it could apply to silver and uranium or other dense media leach duties._x000D_
Agitator drive sizes are examined as well as process risks associated with large tank agitation. New technology has increased the maximum tank size and designers are now experienced in tank volumes in excess of 5000 m3. Tanks of 6000 m3 have been agitated and 10 000 m3 tanks are within present engineering know-how and scale-up._x000D_
Fabrication techniques for shaft and impeller designs exceed the existing standards and new specifications will be needed to cover large mixer design. The paper covers certain aspects of mechanical design and proposes alternative standards that are more appropriate. Process considerations such as fluid natural frequency as well as typical superficial velocities for efficient operations are examined. Scale-up techniques based on existing and new technology are also examined to ensure a successful installation._x000D_
The presentation therefore covers the majority of large mixer design questions that are frequently asked._x000D_
FORMAL CITATION:Baguley, W, 2006. Advanced concepts in large slurry storage tanks, in Proceedings Metallurgical Plant Design and Operating Strategies 2006, pp 104-124 (The Australasian Institute of Mining and Metallurgy: Melbourne).