Novel screen flood detection device improves productivity

In an important development for the solid/liquid separation industry, Tenova Delkor has developed and patented a novel belt linear screen (BLS) flood detection device. The device detects when a waste (trash) removal screen is overloaded, then sends a signal for corrective action to be taken.  As flooding of screens is a common problem, the device has the potential to significantly improve productivity on a wide variety of processing operations.

Besides their many other applications, Tenova Delkor Belt Linear Screens are typically applied in gold mines’ carbon-in-pulp circuits. The screens have 2 purpose; immediately after the mill, to discharge cyclone overflow for the removal of waste (trash) and oversize prior to a leach or flotation circuit and, for carbon safety at the back end of the leach circuit.  In gold mines, the Delkor BLS flood detection device is particularly beneficial for waste (trash) screen duty after milling, but it can also be used for any oversize duty, for example, the removal of shell or fibres from dredged mineral or silica sand.

When it detects overloading of the screen, the device sends a signal via the control system to the screen’s drive motor. Upon receiving the signal, the drive motor speeds up the belt linear screen’s cloth speed so as to provide increased open area to the slurry flow, thereby mitigating flood events.

Delkor BLS flood detection is also invaluable in applications where it is common for mills to discharge cyclones to rope, that is, to operate in an upset manner, sending coarse material to the belt linear screens. The BLS flood detection device informs the operation that it is roping and,  assists as a control measure to react to this upset operating condition.

The name Tenova Delkor has become synonymous with world and industry leading belt filter and belt screening technology. The Tenova Delkor Belt Linear Screen was developed through extensive test work to solve a major problem in the carbon-in-pulp/carbon-in-leach process; effective removal of waste (trash) material from slurries. In more recent technology developments, Tenova Delkor has introduced a 40 m² belt linear screen and as a further client benefit, the majority of Tenova Delkor’s designs are now containerised to reduce freight logistics requirements to mines in remote locations.

Tenova Delkor introduced the horizontal belt filter concept in 1975, and has designed and manufactured over 650 units from small pilot filters to large units. Tenova Delkor Horizontal Belt Filters outperform rotary drum, disc, tilting pan and table filters in all applications where increased capacity, efficient washing and minimum liquor dilution are required.

Tenova Delkor is an industry specialist in solid / liquid separation and mineral processing applications for the minerals, chemical and industrial markets. Offering flotation, sedimentation, filtration, screening and gravity separation systems, Tenova Delkor services range from testwork, process trade-offs and flowsheet design, to installation, commissioning and aftermarket support.

Tenova Mining & Minerals is a total integrated solutions provider to the global mining, bulk materials handling and minerals beneficiation and processing sectors, offering innovative technological solutions and full process and commodity knowledge across the mining and minerals industry value chain.

Technical Enquiries: Rhett McElvenny    e-mail: [email protected]

Tenova is a worldwide supplier of advanced technologies, products, and engineering services for the iron & steel and mining & minerals industries.

Further information is available at: www.tenova.com.