Research Article
Communition Circuit Flowsheet Development for Optimum Performance of Iron Ore Processing, in the Case of Sekota, Wagehemira, Northern Ethiopia
Issue:
Volume 10, Issue 1, March 2025
Pages:
1-26
Received:
5 December 2024
Accepted:
21 January 2025
Published:
10 February 2025
Abstract: Comminution flow sheet design is a critical process in the production of iron ore. In this study, the flow rate was fixed at 150 t/h with the Crusher specification of a Cedarapids JC24x36 jaw crusher model and a Nordberg Hp 300 S/M cone crusher. Based on the mineralogical information and ore properties provided the Agg Flow Version 460.22 software is used to conduct, a comprehensive comminution flow sheet design to achieve the desired particle size distribution. In the comminution of primary crusher stage Iron ore at top size of 42 inches or (1066.8 mm) generates 5 different ranges of materials, the first is at a size of 45 mm, the second at 10 mm, and the third is at 8 mm, between 15 and 8 mm and between 23.5 and 15 mm. The primary crusher, a Cedarapids JC2436 Model Jaw crusher, was required to reduce the feed size with closed side setting of 69.85 mm to a manageable size of end product 21 Mtph for further processing. The Nordberg Hp 300 S/M cone crusher was used as a secondary crusher with closed side setting (CSS) of 28 mm to further reduce the particle size to 26 Mtph. To complete the task several choices analyzed and as final design used 1 jaw crusher Cedarapids Jc 2436, and two cone crushers Nordberg HP 300 S/M. some screening and conveyors placed in the design to increase the reduction ratio of the equipment.
Abstract: Comminution flow sheet design is a critical process in the production of iron ore. In this study, the flow rate was fixed at 150 t/h with the Crusher specification of a Cedarapids JC24x36 jaw crusher model and a Nordberg Hp 300 S/M cone crusher. Based on the mineralogical information and ore properties provided the Agg Flow Version 460.22 software ...
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Research Article
Characterisation and Metallurgical Response of Gold Ores from Transition Zones in Ashanti Belt Zone of Ghana
Issue:
Volume 10, Issue 1, March 2025
Pages:
27-37
Received:
15 July 2025
Accepted:
29 July 2025
Published:
18 August 2025
DOI:
10.11648/j.ijmpem.20251001.12
Downloads:
Views:
Abstract: The complex and variable mineralogical compositions of transitional gold ore zones pose significant metallurgical challenges. Using a multi-technique analytical approach that integrates geological, mineralogical, and metallurgical data, this study characterises gold ores from transitional zones within Ghana's Ashanti Belt. XRD, light microscopy, XRF, Raman spectroscopy, sulphur and carbon speciation, preg-robbing index (PRI) tests, and diagnostic leaching studies were performed on six representative samples from three mining companies. The results show that the ores, which are mainly rich in quartz and sericite, have variable sulphide (0.11-0.94%) and organic carbon (0.13-2.11%) contents, which significantly affect the cyanidation performance. Raman spectroscopy revealed different levels of carbon maturity, while optical microscopy verified the presence of pyrite and arsenopyrite. Diagnostic leaching showed highly variable gold deportment: gold was distributed among free-milling phases, sulphides, carbonaceous materials (CM), and residual fines. Samples with higher sulphide and organic carbon contents demonstrated strong preg-robbing behaviour and poor cyanide leach recoveries (34-40%), while those with lower contents achieved recoveries of 75-77%. The study highlights the pronounced intra- and inter-sample variability across the transitional zone ores, underlining the inadequacy of conventional processing approaches. It concludes that a geometallurgical framework anchored in integrated multi-technique characterisation is essential for optimising gold recovery and guiding efficient, domain-specific processing strategies for transitional gold ore deposits.
Abstract: The complex and variable mineralogical compositions of transitional gold ore zones pose significant metallurgical challenges. Using a multi-technique analytical approach that integrates geological, mineralogical, and metallurgical data, this study characterises gold ores from transitional zones within Ghana's Ashanti Belt. XRD, light microscopy, XR...
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Getahun Mesert
