Browsing Faculty of Engineering by Author "10192247 - Campbell, Quentin Peter"
Now showing items 21-32 of 32
-
Mineralogical, chemical, and petrographic properties of selected South African power stations’ feed coals and their corresponding density separated fractions using float-sink and reflux classification methods
(Taylor & Francis, 2019)Three South African feed coal samples for the combustion process were beneficiated to produce carbon-rich and mineral-rich fractions. The mineralogical, petrographical, and chemical properties of these feed coals and ... -
Moisture adsorption and desorption characteristics of some South African coals
(SAIMM, 2013)The high final total moisture content of fine coal after mining and processing is one of the major reasons that this resource is not extensively used in subsequent power generation, combustion, or other conversion processes. ... -
Moisture retention and migration in a coal product stockpile
(IMPC, 2014)Most coal supply contracts include strict limitations on the moisture content of the products. This limitation exists because of calorific, transport cost, and handling reasons. Managing the retention time on product ... -
Moisture transport during contact sorption drying of coal fines
(Taylor & Francis, 2020)Studies have shown that contact sorption drying is a feasible technique to dewater fine (+0.15mm–0.5mm) and ultra-fine (−0.15 mm) coal. The aim of this article is to further investigate the drying mechanism involved. It ... -
The preparation of activated carbon from South African coal
(SAIMM, 2012)Activated carbons used in the precious metals extraction industry are characterized by large internal surface areas and a great affinity for metal ions. The purpose of this research is to prepare activated carbon from ... -
The product yield problem and the history and future of washability analysis
(International Pittsburgh Coal Conference, 2016) -
The qualification of coal degradation with the aid of micro-focus computed tomography
(ASSAf, 2015)The production of unwanted coal fines during the handling and utilisation of coal is a serious problem in processes that rely on large or closely sized particles. Coal degradation occurs at many different steps within ... -
A review of the application of X-ray computed tomography to the study of coal
(Elsevier, 2017)There has been a long history of using X-rays to visualize coal and its transitions during various treatments. Advances and improved availability has allowed the application of X-ray computed tomography (CT) to create 3D ... -
Simulation of washability and liberation information from photographs
(Springer, 2016)Imagine that a sample of coal could be crushed unlimited times to the same or different top size; a different washability would be obtained for each crushing experiment. Depending on the size and distribution of the raw ... -
Using visual texture analysis to classify raw coal components
(IEEE, 2015)Coal ore isn’t a uniform material. In order to optimize the coal liberation process it is necessary to classify a coal ore sample into its constituent components as quickly and cheaply possible. This paper investigates ... -
Validation of using a modified BET model to predict the moisture adsorption behavior of bituminous coal
(Taylor & Francis, 2016)A good correlation exists between the amount of moisture adsorbed and the oxygen content of medium-rank B vitrinite-rich and medium-rank C inertinite-rich bituminous coal. Total mass moisture adsorbed per gram of coal ... -
Water-only laboratory coal fractionation using the reflux classifier
(Elsevier, 2015)Due to health and environmental factors involved with standard float-sink analytical methods, a water-only fractionation procedure was investigated. A laboratory scale 105 × 105 mm reflux classifier was built and used to ...
