ORCID Profile
0000-0003-3073-5318
Current Organisation
University of Mines and Technology
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: African Journals Online (AJOL)
Date: 31-12-2020
DOI: 10.4314/GM.V20I2.7
Abstract: Acid and Metalliferous Drainage (AMD) is recognised as serious environmental problem in the mining industry. This is because environmental issue of AMD poses serious threat to water quality, vegetation cover and social licence of the mining operations. AMD occurs when reactive sulphide bearing materials are exposed to oxidising conditions. It has now become imperative for some mining companies to test sulphide bearing minerals for their AMD potential before major mining excavations are done. This work determines the AMD potential of fifty (50) waste rock s les from a Mine using Acid Base Accounting (ABA) techniques. Mineralogical studies on the s le indicated that the major sulphide mineral assemblages present were pyrite, arsenopyrite and chalcopyrite. Paste pH showed that 20% of the s les had undergone weathering and as such AMD generation had already started. Approximately 22% of the s le had conductivity levels between 1000 to 10,000 µS/cm and this shows a typical AMD chemical characteristic of high salinity. Acid Base Accounting showed that 32% of the s les were acid generating. Exactly 16% were non-acid forming and 52% were uncertain. The analysis showed that the potential for AMD generation exists for the waste rock material and can affect the local environment, specifically water quality if preventive measures are not taken. Keywords: Sulphide, Waste Rock, Acid Base Accounting, Paste pH, Conductivity
Publisher: Elsevier BV
Date: 2014
Publisher: Elsevier BV
Date: 11-2014
Publisher: African Journals Online (AJOL)
Date: 07-07-2020
DOI: 10.4314/GM.V20I1.5
Abstract: Abstract Classifying Mn Ore to improve upon the grade and the properties has become a crucial activity for the Mn industry since it increases the market value of the ore. Ghana Manganese Company (GMC) has renovated their oxide washing plant by integrating it with a spiral classifier to make a batch system operating process. Particle size of .35mm (Mn grade of 43-47%) obtained from the primary section of the plant served as feed to the classifier and with the plant condition (i.e. at 60 min washing time, 30 rev/min speed of spirals and feed tonnage of 6 t), Mn grade of 49% was achieved. This paper focused on the optimisation of some selected operational parameters of the classifier to obtain a Mn grade % using Design of Experiment (DOE). Series of test works were designed using the DOE for the classifier using the constraints of washing time (30-90 min), speed of spirals (20-40 rev/min) and feed tonnage (6-9 t). The outcome of the test work after simulation showed that all the selected parameters had a great influence on Mn grade. The spiral speed and feed tonnage correlated negatively to the Mn grade with washing time correlating positively. Operating the spiral classifier at a feed rate, spiral speed and washing time of 6 t, 25 rev/min, and 30 min, respectively, yielded Mn grade of 53%. A Confirmatory test using the established conditions gave a Mn grade of 53%, which is a 4% increment in the previous Mn grade which was 47%. The outcome of the studies is the new established operational conditions which is adhered to by the plant, producing a manganese concentrate grade ranging between 52-54%. Keywords: Design of Experiment (DOE), Spiral Classifier, Grade, Manganese
Publisher: Science Publishing Group
Date: 2016
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 07-2013
Publisher: Elsevier BV
Date: 2015
Publisher: Informa UK Limited
Date: 27-09-2020
Publisher: Ariviyal Publishing
Date: 21-08-2020
Publisher: Elsevier BV
Date: 08-2021
Publisher: Elsevier BV
Date: 09-2020
Publisher: Sretechjournal Publication
Date: 2020
Publisher: Springer Science and Business Media LLC
Date: 10-12-2022
No related grants have been discovered for Clement Kwasi Owusu.