Modern Mining November 2018

PRODUCT News

SlurrySucker relieves silting at chrome operation

The transport screen scroll also acts as a control mechanism by regulating the sliding speed of the solids as well as the retention time. Vibration isolation of the bearing housing from the structural steel support is conducted with rubber buffers. These eliminate 95 % of all dynamic loads which would be transmitted to the support structure. The Siebtechnik Conturbex Screen Scroll Centrifuge is available from Multotec, and the large South African installed base is supported by a technical team that offers process solution information. A compre- hensive parts stockholding is maintained and refurbishment of units is also under- taken at Multotec’s Spartan facilities. Multotec Group, tel (+27 11) 923-6000, website: www. multotec.com SlurrySucker Maxi is that we only need one small area to begin the desilting work,”says Vine. “In this case, we started in one corner of the dam and created a cut by attack- ing the sediment to create space for more water to re-enter the working area.” He highlights that the mine needed the dam to remain on line during the dredg- ing, so water would continue to enter the pond from the processing plant. “The SlurrySucker only needs a 400 mm draught of water above the sediment for the floating unit to operate,” he says. “A dewatering pump takes the top layer of water and feeds it down to the dredge- head, where the slurry is agitated so it can be pumped away.” The dredging unit is pulled back and forth across the dam, creating a new cut on each journey by removing a lane of silt at a time. Despite its capacity of 75 dry t/h, the SlurrySucker Maxi model’s compact design makes it simple to move and operate. Integrated Pump Rental, website: www.pumprental.co.za

When a chrome mine in the Steelpoort area recently experienced a challenge with a tailings dam overfilling with slurry sedi- ment, it was Integrated Pump Rental and its SlurrySucker Maxi dredging unit that came to the rescue. “One of our mining customers had a tailings dam that was filled with slurry to

over 110 %of its capacity and the sediment needed to be removed to ensure optimum functioning of the tailings facility,”Lee Vine, MD of Integrated Pump Rental, explains. Integrated Pump Rental’s SlurrySucker dredge units are suitable for dredging and cleaning water capture areas where silt or slimes have become an issue, or

where water retention and water holding capacity in process ponds is being threatened. E q u i p p e d w i t h a 37 kW Bravo 700 Grindex pump, and with capacity to pump 70 t/h of slurry, the SlurrySucker Maxi operates at an average of about 40 % concentra- tion, depending on factors such as the material’s spe- cific gravity and how solid the sediment has become. “ The beauty of the

The SlurrySucker cleaning a tailings dam at a chrome mine.

Proven innovative scrolled design on centrifuge Known for its robust construction, the Sieb­ technik Conturbex Screen Scroll Centrifuge offers ease of operation due to its ability to absorb process variations. Its scrolled or

wormed design is well proven in solid liq- uid separation applications, across a broad spectrum of industries. The centrifuge comprises a drive compo- nent located in the bearing house, a drumwhich holds the screen in place, a scroll which transports the prod- uct across the basket and a housing which encloses the rotating parts. The innovative construction of the screen scroll centrifuge inlet turns in the same direction as the screen drum, but at a small differ- ential speed. This ensures a uniform acceleration of the solids, and elimi- nates imbalances in dewatering applications.

The Conturbex Screen Scroll Centrifuge with ceramic tiles to protect the steel housing from impact wear.

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52  MODERN MINING  November 2018