MINING SCREENS goovi ® is the name of a newly developed multi vibrating screen from thyssenkrupp Industrial Solutions with new patented drive technology in combination with an innovative control system it says providing a significant increase in operational flexibility , product quality and performance , coupled with greatly reduced weight and height
coupled with greatly reduced weight and height ,” says the company . Achim Schönfelder , Head of Product Line Screens and Feeders at thyssenkrupp Mining Technologies : “ With the goovi , all vibration modes ( circular , linear and elliptical ) can be realised in one machine , allowing flexible adaptation to changing job requirements and material properties . In addition , the low height of the goovi facilitates simple installation in existing plants .”
The goovi is driven at four different points , one on each side front and back , resulting in an optimum stress distribution in the side walls . It also uses fewer rotating parts than conventional screens , which translates into significantly lower weight and height as well as reduced maintenance and wear . Two or three standard unbalance motors are installed at each drive point , so each goovi is driven by a total of 8 or 12 motors , depending on size , which are synchronised via a patented PLC supplied with the machine .
With the patented control system , speed and flow direction can be steplessly adjusted so that all important operating parameters can be optimally adapted to the requirements of production at any time . In addition , with the goovi it is possible to react flexibly to changes in material properties ( eg moisture ) during operation and optimise the processing of difficult-to-screen materials . Different product qualities can be saved in recipes and retrieved as required at the touch of a button via the touchscreen supplied .
The goovi can also be integrated into control loops for product optimisation . There is a preset cleaning function for the removal of clogged particles . The goovi is fully digitised and can be integrated into a higher-level control system , paving the way for Industry 4.0 in processing plants .
Peter Berlitz , Product Manager Screens at thyssenkupp Mining Technologies : “ To optimise costs and delivery times , thyssenkrupp has
developed a range of standard machines . The single-deck and double-deck versions are available in six different widths and four different lengths with a maximum screening area of 26 m ². However , due to the straightforward modular design , custom solutions tailored to a particular application can also be supplied .”
Vibramech success backed by R & D
South Africa-based screens major Vibramech says its exclusively appointed R & D mechanical engineers focus their competencies on a wide range of structural improvements and innovative design changes , across all of its products . “ They conduct continuous research programmes on a variety of applications , ranging from isolator optimisation to structural dynamic and fatigue optimization of complete screens and feeders . Vibramech believes that its in-house R & D will minimise their clients ’ investment costs through optimum design and result in the production of even more durable equipment .”
It says the R & D team utilises the most advanced simulation software to conduct finite element analysis ( FEA ), as well as multibody dynamic analysis to improve engineering efficiency and reliability of components in their design phase . This is complemented by practical tests such as destructive and non-destructive testing , modal analysis , vibration analysis and strain gauge measurements to ensure that integrity and reliability of its products are maintained .
Vibramech says its exclusively appointed R & D mechanical engineers focus their competencies on a wide range of structural improvements and innovative design change
Vibramech has also recently started to employ the latest technologies such as wireless sensors to continuously monitor the performance of its client ’ s equipment . “ This enables Vibramech to constantly monitor the health and condition of the equipment in the field , with potential breakdowns on site being rectified before the client is even aware of such problems . This continuous monitoring will lead to reduced
HAZEMAG ’ s mobile and modular screen for OCP
Moroccan phosphate mining giant OCP has a long and ongoing relationship with Germany ’ s HAZEMAG but the latest crushing and scalping unit supplied stands out in terms of innovation – it is all at once compact , modular and mobile but also capable of 3.5 Mt screening and crushing per year .
Recently , commissioning tests of the mobile crushing and screening unit at the Benguerir phosphate mine commenced . In all , 1,250 t of equipment was supplied including a 750 t main unit . It integrates equipment with new technologies such as silent screening using 15 mm disc scalpers , an innovative metal retaining wall capable of supporting 190 t class mining trucks , a five-module mobile system , and remote monitoring capability for production and maintenance indicators . The crushing system utilises a HAZEMAG HHI Horizontal Impact Crusher .
The project is a collaboration between HAZEMAG Germany , HAZEMAG Morocco , Charcomem and Sphinx , on one side and OCP plus JESA ( 50 % OCP ; 50 % Worley ) on the other . Located some 70 km north of Marrakech , Benguerir is the newest of Morocco ’ s four phosphate mining centres , having started production in 1979-80 . The mines at Benguerir and Youssoufia together make up the Gantour system , the thirdlargest phosphate mine in the world . Phosphates from Gantour are transported to Safi for processing and export .
OCTOBER 2021 | International Mining 27