Nickel-Copper sulphide ores are the most important Platinum Group Metal bearing ores. The South African deposits are exceptionally rich in the platinum group metals (PGMs) and production of the PGMs is the primary purpose ...

My applied engineering research and industrial application work of the past 20 years is presented in this dissertation. It is the conjecture of my work that only if thorough first principles knowledge of the depth of ...

ENGLISH ABSTRACT: The dissolution of gold from refractory ores is a complex kinetic problem involving a number of chemical, mass transport and mineralogical factors. In most Witwatersrand ores in South Africa more ...

ENGLISH ABSTRACT: Bath type furnaces have become an established technology for the intensive smelting, converting and refining of primary and secondary raw materials. Since these furnaces normally have large inventories, ...

ENGLISH SUMMARY: Supercritical fluids fulfil specialised roles in the food and beverage, petroleum, natural gas, polymers, pharmaceuticals and novel materials development industries. Supercritical fluid extraction (SFE) ...

In the smelting of copper waste slags to recover cobalt and copper, the prediction of the metal liquidus temperature and the associated superheat for liquid metal handling for subsequent treatments cannot be done with ...

ENGLISH SUMMARY: Chemical processes are designed around the manipulation of thermodynamic properties of chemical species and their mixtures. The ability to predict these properties accurately has driven the development of ...

ENGLISH ABSTRACT: The artificial intelligence community has developed a large body of algorithms that can be employed as powerful data analysis tools. However, such tools are not readily used in petrochemical plant ...

ENGLISH ABSTRACT: Distillation column design and operation require understanding of both the hydrodynamic and thermodynamic behaviour and limitations. One of the hydrodynamic aspects that negatively influence separation ...

ENGLISH ABSTRACT: The importance of waste management is growing rapidly for several reasons. These reasons include the escalating cost of wastewater treatment and cleaning chemicals, an emerging trend of onerous regulatory ...

ENGLISH ABSTRACT: Cultivar/environmental variabilities in the production of triticale straw, and its impact on pretreatment-hydrolysis processes for conversion to bioethanol, were addressed in this study. Twenty triticale ...

ENGLISH ABSTRACT: Since the production of second-generation biofuel (SGB) from lignocellulosic plant biomass is only economically attractive if driven by government incentives, stakeholders are reluctant to commercialise ...

ENGLISH ABSTRACT: The extraction of hemicelluloses prior to pulping that would have been dissolved in black liquor during pulping process, is an attractive alternative for pulp and paper mills as they, in addition to ...

ENGLISH ABSTRACT: This study is part of the continuing global research effort dedicated to finding alternative aquafeed ingredients, which not only replace fish meal and fish oil as sources of essential nutrients in ...

ENGLISH ABSTRACT: In this thesis, Computational Fluid Dynamics (CFD) was applied to study gas dispersion and mixing characteristics of industrial and pilot scale flotation columns. An Eulerian-Eulerian multiphase modelling ...

ENGLISH ABSTRACT: Structured packing is a popular column internal for both distillation and absorption unit operations. This is due to the excellent mass transfer characteristics and low pressure drop that it offers ...

ENGLISH ABSTRACT: A mathematical model is presented which conceptualises fluid flow and heat transfer in cellular metallic foams completely saturated with a fluid in motion. The model consists of a set of elliptic partial ...

ENGLISH SUMMARY: The world is under increasing pressure to develop new, more energy-efficient technologies that enable the production of less waste and are more sustainable. Material processing through microwave energy has ...

ENGLISH ABSTRACT: The ongoing trend in papermaking industries is to lower production costs by increasing the low cost filler content in the sheets. However, the disruption of inter-fibre bonding is accompanied by a ...

ENGLISH ABSTRACT: The development of advanced methods of process monitoring, diagnosis, and control has been identified as a major 21st century challenge in control systems research and application. This is particularly ...