Browsing by Subject "Porosity"
Now showing items 1-10 of 12
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Analysis of flow through cylindrical packed beds with small cylinder diameter to particle diameter ratios
(2014)The wall effect is known to present difficulties when attempting to predict the pressure drop over randomly packed beds. The Nuclear Safety Standard Commission, “Kerntechnischer Auss-chuss" (KTA), made considerable efforts ... -
Analysis of the pressure drop through structured packed beds
(North-West University (South Africa), 2020)Accurately analysing the pressure drop over structured packed beds is of great importance to certain reactor designs, such as the Pebble Bed Modular Reactor (PBMR). In previous studies, the High Pressure Test Unit (HPTU) ... -
Characterisation of an industrial Søderberg electrode
(North-West University (South Africa), 2023)Søderberg electrode management (together with the initial design of the electrode system) is commonly considered as one of the most important aspects of profitable and safe submerged arc furnace operation, with some even ... -
CO2 reactivity of briquettes derived from discard inertinite-rich Highveld coal using lignosulphonate and resin as binders
(SAIMM, 2019)South African collieries generate approximately 31 Mt of fine and ultrafine coal annually, with the majority of the ultrafine fraction discarded in slurry ponds and underground workings. Use can be made of this energy ... -
Effect of fine coal tailing porosity on the mobility and speciation of heavy metals in the leachates
(EARET, 2018)The effect of porosity of coal tailings on the mobilization and speciation of heavy metals is important for the implementation of management strategies. In this study, column leaching experiments were carried out to ... -
An evaluation of coal briquettes using various binders for application in fixed- bed gasification
(North-West University (South Africa) , Potchefstroom Campus, 2016)South Africa continues to rely considerably on coal as a source of energy and carbon derived chemicals. The rigorous coal mining processes result in the production of over 28 Mt of coal fines per annum. Depleting coal ... -
An investigation into the deformation of direct metal laser sintered parts
(2015)Direct Metal Laser Sintering (DMLS) is a rapid prototyping technique that allows for direct and rapid manufacturing of complex components. DMLS is however an intricate process and the quality of the final product is ... -
Investigation into the velocity distribution through an annular packed bed
(North-West University, 2009)The purpose of this study was to investigate the velocity distribution through an annular bed packed randomly with equal sized spheres. Extensive research has been conducted on the velocity distribution inside packed ... -
Numerical analysis of the flow distribution within packed columns using an explicit approach
(North-West University, 2011)Existing correlations developed to account for pressure drop and velocity distribution in packed beds are not ideal for beds with low aspect ratios. This study investigated a method to model flow distribution through ... -
Some physical and chemical characteristics of calcium lignosulphonate-bound coal fines
(SAIMM, 2018)Low-cost calcium lignosulphonate (CL), which is a byproduct of theWOOD pulping industry, was investigated as a potential binder during laboratoryscale pelletization of inertinite-rich high-ash coal fines from the ...