SCREENING
88 Derrick Fine Screens are operating at the Iron Bridge Magnetite Project in WA
by SIMPEC , with first concentrate produced in April 2023 . The wet plant complements the upstream dry plant which has two dry crushing circuits utilising Weir HPGRs for tertiary crushing , dry screening and dry magnetic separation then air classification and Weir HPGR primary grinding
prior to process water addition and feed to the wet plant .
PPM deploys GK ’ s STM screening technology
Pilanesberg Platinum Mine ( PPM ) is a platinum mining company based in South Africa owned by Sedibelo Resources . PPM ’ s existing screens needed to be replaced annually due to wear and tear , and the moisture content of ores was higher than they would have liked . Increasing material retention while reducing downtime due to maintenance were their two primary goals with this project . They needed new screening equipment to help them achieve their long-term goals , so they started looking for options in the market .
Because it had used vibratory mining equipment in the past , Pilanesberg Platinum Mine was familiar with General Kinematics ( GK ) and its Two-Mass technology . It contacted a GK representative and told them its goals : reduced energy consumption , increased material retention , reduced moisture content , and
Mogensen builds screening strength under JOEST
As of January 1 , 2024 , Mogensen officially joined the JOEST group . This significant integration marks a milestone in the company ’ s history and it says offers promising prospects for the future . The association with the JOEST group provides Mogensen with access to a broader network , deeper resources , and expanded expertise in bulk material processing . Together , Mogensen and the JOEST group says they will “ continue to develop outstanding solutions in the field of screening , sorting , and washing technologies , supporting customers worldwide with innovative products and tailor-made solutions . This partnership will not only strengthen the technological excellence of both companies but also elevate customer satisfaction to a new level .”
Mogensen is particularly recognised as a pioneer in screening technology , notably with the groundbreaking MSizer screening machine . “ The MSizer models Compact , Extend , and Giant by
The Mogensen MSizer it says represents the ideal solution for Mogensen represent the ideal various screening and classification tasks solution for various screening and classification tasks . These models set new standards in bulk material screening . The variants differ in their screen deck lengths and are available in various working widths . While the MSizer Compact is powered by a vibration motor and produces an elliptical motion pattern , the MSizer Extend and Giant are excited by two unbalanced motors or directional exciters , generating a linear vibration . The MSizer Giant is considered the world ’ s largest sizer and can achieve extremely high performance as a single machine .”
These screening machines are available with different screen decks , allowing for optimal adaptation to individual screening requirements . The MSizer series is cited as being suitable for screening a range of mined minerals , including in particular salts and potash .
reduced dynamic loads .
Considering their goals , the GK representative recommended the STM-SCREEN™ Two-Mass Vibratory Screen . PPM agreed this equipment would be a good fit for their facility due to its high retention time and ability to be customdesigned to integrate seamlessly into their old machinery ’ s footprint .
PPM ordered the STM-SCREEN™ from General Kinematics with a special hybrid 1.5 deck design . It was designed , built , and installed to fit their old equipment ’ s footprint , which was 3.6 m wide x 6.1 m tall . The installation went smoothly , with no changes to existing structures and chutes required , and the machine was up and running shortly after . The Two-Mass technology allows it to sustain a consistent , responsive stroke even under surge conditions , whereas their previous models could not . It offers greater material retention , allowing them to work the material longer , and decreasing the ore ’ s moisture content .
The STM-SCREEN™ was installed on PPM ’ s site and immediately got to work . Since they started operating the machine , PPM reported the following improvements : n Increased product retention time by 40 % compared to other models n Increased screening capacity by 40 % n Eliminated excess moisture content in the
UG 2 product n Reduced power consumption by 75 %
Pilanesberg Platinum Mine reported they were highly satisfied with the results of GK ’ s Two-Mass STM-SCREEN™ , which increased their efficiency while also assisting them in achieving more sustainable operations . The mine reported the STM-SCREEN™ was quieter than previous screens , reducing noise pollution and eliminating vibrations in office buildings . Additionally , the durable design saved PPM time and resources thanks to reduced maintenance and saving the annual swap efforts .
“ The General Kinematics STM-SCREEN™ has delivered on its promise . Screening efficiencies are up , downtime is reduced , energy consumption has been improved , and dynamic loading on the steel DMS structure has significantly been reduced . I see the application of this alternative screening technology as a true game-changer in the South African mining industry ,” said Barry Davis , General Manager - Surface Operations , Pilanesberg Platinum Mine . GK says the Two-Mass STM-SCREEN™ has been a revolutionary force in the mining industry for years . Two-Mass refers to a style of vibratory equipment where one mass ( the exciter , ie ‘ drive ’) is used to mobilise a second mass ( the trough , ie ‘ screen body ’). GK : “ The engineering principles behind Two-Mass technology are inherently more suited for the rigors of heavy-
40 International Mining | OCTOBER 2024