MINING SCREENS
With eight decks operating in parallel and an innovative Front-to-Back ( FTB ) tensioning system , the SuperStack ® has a demonstrated capacity up to three times that of the best fine screens currently available
its firm commitment to advancing gold processing technology . These solutions include trash screens , urethane interstage screens , carbon sizing screens , dewatering screens , tails safety screens and other processing stages . All equipment incorporates Derrick ’ s strong commitment to personal safety by minimising touchpoints .
Derrick now offers its latest innovation – Trilogy™ surface technology – as its most advanced screening system . Trilogy is composed of individual thermoplastic components that may be assembled into various configurations for added flexibility . This new innovation from Derrick it says can increase gold recovery and reduce operating cost .
And Derrick says it has again “ redefined high capacity , high efficiency , fine particle wet screening ” with the SuperStack ® . “ With eight decks operating in parallel and an innovative Front-to-Back ( FTB ) tensioning system , the SuperStack has a demonstrated capacity up to three times that of the best fine screens currently available . All this added capacity comes with only a slight increase in the space required per machine , significantly reducing the total capital and installation cost as well as OPEX for any screening installation .”
The FTB screen tensioning system , which tensions the panel in the direction of flow rather than side to side , results in more effective use of screen area and increased capacity . In addition to increasing productivity , the tensioning system reduces screen panel changing time by 80-90 % ( 1-2 mins per panel change ) compared with sideto-side tensioning . A full range of Derrick Polyweb ® urethane screen panels are available for the SuperStack , from 53 to 1,000 µ m with slotted openings . An optional re-pulp spray system introduces free water into replaceable rubber wash troughs to help undersize material pass through screen openings .
Dual oversize launders ( one per side ) and a single undersize launder eliminate the need for a large hopper , minimising height requirements .
Each feeder has an easily removed front cover to facilitate maintenance and debris removal . Custom designed inlet pipe configurations are available from Derrick if needed to meet equipment layout requirements . The Flo- Divider™ , which equalises flow from the feed source to each deck , is available in a number of discharge outlet configurations from two-way to 16-way .
Dual vibratory motors are positioned directly over the upper screen frame to deliver linear vibratory motion to all eight screen decks . The motors have an internal oil lubrication system that eliminates the need for a separate lubrication system , while providing long-term maintenance-free operation and low sound production .
Schenck takes screen digitalisation to the next level
Advancing its digitalisation strategy , Schenck Process recently launched its newest innovation - CONiQ ® Cloud , a cloud-based IoT solution designed to access data from machine assets . transparency facilitates efficient management of consumables and spare parts scheduling .
CONiQ ® Cloud will be released with Schenck Process ’ IoT edge solution CONiQ ® Monitor which manages all sensors , performs edge analytics and securely pushes all relevant data into CONiQ ® Cloud . The edge solution enables data ingestion by the local process control system , thus providing process critical information directly to plant operation and maintenance . Specifically with regard to screening application , in comparison to the 2015-released CONiQ system , the key benefits are cited as follows : n Based on most recent IoT technologies , the new CONiQ solutions are fully flexible in relation to sensors , analytics and communication interfaces . Thereby the new CONiQ solution can be continuously adapted to emerging customer needs , rising IoT technologies and new lessons-learned referring to screen monitoring . This again ensures , that the IoT-based CONiQ solutions will continuously provide more insights with an increasing level of accuracy . n Wireless IP67 weatherproof sensors for increased reliability and usability . n Industry leading screen motion monitoring analytics based on distributed synchronised self-levelling motion sensors . Thereby even issues with subtle warning signals can be detected and diagnosed providing valuable information to save maintenance and operational costs . n Great versatility enabling to perfectly fit CONiQ Monitor to any machine type including elliptical motion machines and Screens driven by four Schenck Process DF704 exciters . n In-built self-diagnosis to avoid false alarms and foster efficient troubleshooting . n Faster Web Interface through higher scalability . n One access point for the user , with better control of his assets . Exciter monitoring functionality is also being added with the next release scheduled for Q3 2021 . Easy-to-retrofit wireless sensors will be used to measure exciter condition related signals .
JOEST grizzlies go to work at Roy Hill
Last year , JOEST Australia Pty Ltd supplied two JOEST vibrating grizzly screens ( one primary and one rotable ) to Roy Hill Iron Ore Pty Ltd for their iron ore plant in the Pilbara region of Western Australia . JOEST Australia is a subsidiary company of , JÖST GmbH + Co KG headquartered
Mineral Resources trialling carbon fibre screens
Australia ’ s Mineral Resources Ltd ( MRL ) says it is always looking at opportunities to work safer , create efficiencies and be more cost effective , and part of this includes looking at carbon fibre technology . In a world first , MRL has successfully developed carbon fibre vibrating screens for its crushing and wet processing plants , which look set to take the place of traditional steel vibrating screens and bring a host of life-of-plant cost and productivity benefits . Constantly on the move as they classify ore into different size fractions , vibrating screens made of steel are prone to fatigue corrosive cracking . In contrast , carbon fibre screens are lightweight , corrosion resistant and have a significantly higher structural strength than carbon steel . With a service life of 3-5 times longer than steel screens the carbon fibre screens offer significant cost benefits , with MRL able to manufacture them inhouse at its own facility in Bibra Lake , Western Australia . MRL has commenced in-field testing , replacing a traditional steel screen with a carbon fibre screen in an existing processing plant at one of its lithium mine sites .
32 International Mining | OCTOBER 2021