|Home News Conferences Commodities Publications Business Directory Resources Help|
:: Outotec Introduces 2nd Generation Paste Thickener for Consistent, Efficient Dewatering Performance
Tailings dewatering and disposal is a challenge that every mining operation has to deal with. The Outotec 2nd Generation Paste Thickener is designed to maximize underflow density regardless of challenging mineralogy and tailings feed rate variation. It enables consistent and efficient dewatering performance - even with changing process conditions. Through consistent performance and high underflow density, the 2nd Generation Outotec Paste Thickener maximizes beaching angle in the tailings storage facility to provide safer operations and maximized lifespan.
The new paste thickener provides ease of operation and reliability for applications requiring a high degree of dewatering, such as minerals tailings, mine backfill, and pre-leach and CCD circuits. The technology is customized to address each operation's unique drivers, which can include environmental concerns, water recovery, regulatory requirements, tailings management, or limitations on available land space.
The new 2nd Generation Paste Thickener builds on this proven performance with a range of innovative new features. For example, vertical load monitoring with the Smart Rake Lift system means the Outotec Paste Thickener is one of the only systems in the world that can detect early formation of rotating beds, enabling counteractions to be taken early. The system also monitors and actively adjusts the individual hydraulic cylinders to maintain alignment of the rake mechanism. Incorporating vertical load sensing with plant process data in the Outotec ACT Thickener Optimizer control system means that the solids inventory within the tank can be maintained to ensure a consistent underflow density, stable process, and improved overall thickener performance.
In addition to mechanical improvements, process control has been further developed to stabilize and optimize the performance of the paste thickener. Outotec's ACT Thickener Optimizer utilizes a multivariable controller to manage process changes and the associated delays in the response time of the thickener that can be challenging for traditional control systems. It can also be configured to manage the effects of variable feed types to ensure optimum performance despite changing inputs to the process. Short installation and configuration time of the system is coupled with on-going services to ensure a practical yet flexible long term control solution.
Better by design
Our application-specific design of the thickener begins with the use of methods such as discrete element modeling (DEM) to understand solid particle movement within the thickener, computational fluid dynamics (CFD) for feed system design and finite element analysis (FEA) for structural steel design. Our paste thickening solutions are also designed with ease of maintenance in mind, with a skid-mounted hydraulic power unit for centralized connection of hydraulic hosing from the rake lift cylinders and drive unit. Other key design features include:
© 1998-2017, Minerals Engineering International