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Ehanced Hydrodynamic Fractionation of Particles. The coal industry, which is a major contributor to the Australian economy, urgently needs a new washability method following its decision to abandon the existing laboratory standard. The existing method relies on the use of heavy organic liquids which are known to be toxic to human health. The 'water-based' approach proposed in this study overcomes the problem of risk to human health, thus benefiting Australian workers, the immediate industry, and ....Ehanced Hydrodynamic Fractionation of Particles. The coal industry, which is a major contributor to the Australian economy, urgently needs a new washability method following its decision to abandon the existing laboratory standard. The existing method relies on the use of heavy organic liquids which are known to be toxic to human health. The 'water-based' approach proposed in this study overcomes the problem of risk to human health, thus benefiting Australian workers, the immediate industry, and wider community. New separation technologies that could benefit the minerals industries and other key industries should follow. The project will also result in the education and training of two postgraduate students, and the advancement of two postdoctoral researchers in this area of industry. Read moreRead less
Hydrophobic particle recovery using permeable hydrophobic media. This project aims to solve an intractable problem in froth flotation. Bubbles will be replaced by permeable, hydrophobic media, minimising the viscous hydrodynamic resistance that limits ultrafine particle recovery. The project expects to generate new knowledge relating the efficacy of the novel media to its underlying physical structure, composition, geometry, and interfacial structure. Expected outcomes include a framework for de ....Hydrophobic particle recovery using permeable hydrophobic media. This project aims to solve an intractable problem in froth flotation. Bubbles will be replaced by permeable, hydrophobic media, minimising the viscous hydrodynamic resistance that limits ultrafine particle recovery. The project expects to generate new knowledge relating the efficacy of the novel media to its underlying physical structure, composition, geometry, and interfacial structure. Expected outcomes include a framework for developing alternative, highly permeable, hydrophobic media, and new high performance separation technologies. This is expected to benefit large scale, low-cost, ultrafast processing of particulate suspensions in mineral processing and waste water treatment.Read moreRead less
Surface characteristics and hydrodynamics in detachment of coarse particles. Froth flotation is widely used for separating coal and minerals from the gangue. The largest particles that can be floated in the industry are 10 times smaller than the particles that can be floated under quiescent conditions. This project aims to better understand and quantify the detachment of large particles from the bubble surface. It aims to develop innovative modelling and experimental approaches to examine the ef ....Surface characteristics and hydrodynamics in detachment of coarse particles. Froth flotation is widely used for separating coal and minerals from the gangue. The largest particles that can be floated in the industry are 10 times smaller than the particles that can be floated under quiescent conditions. This project aims to better understand and quantify the detachment of large particles from the bubble surface. It aims to develop innovative modelling and experimental approaches to examine the effect of particle surface characteristics and hydrodynamic conditions on coarse particle detachment and flotation. New ways to save energy by floating coarse composite particles are proposed to be developed. This research is at the forefront of flotation science and technology, and is expected to deliver significant outcomes to the mining industry.Read moreRead less
Optimizing tailings dewatering through interfacial chemistry and particle interactions. This project aims to improve the dewatering behaviour of waste tailings from mineral processing activites. Dewatering and disposal of tailings containing fine particles are serious issues which confront the mineral industry. Effective dewatering of tailings is determined by particle-solution interfacial chemistry and particle interactions. These properties will be manipulated by matching the molecular arch ....Optimizing tailings dewatering through interfacial chemistry and particle interactions. This project aims to improve the dewatering behaviour of waste tailings from mineral processing activites. Dewatering and disposal of tailings containing fine particles are serious issues which confront the mineral industry. Effective dewatering of tailings is determined by particle-solution interfacial chemistry and particle interactions. These properties will be manipulated by matching the molecular architecture and functionality of flocculants to mineral particle surface chemistry. Optimization of tails interfacial chemistry and particle interactions through conventional and non-conventional flocculants will be investigated and electoosmosis will be applied to achieve maximum dewatering behaviour.The scientific and environmental outcomes will be beneficial to all stakeholders.Read moreRead less
Engineered Inorganic Membranes for Novel Mineral Brine Processing. This project aims to synthesise a new generation of engineered hierarchical membranes for novel brine processing. The key concept of the research is the precise tailoring of pores of inorganic films, forming functional meso-structures for separating salts from water. Salt crystallises perpendicular to the surface of the membrane, whilst easily removed by air, a process that can be repeated many times leading to high production ra ....Engineered Inorganic Membranes for Novel Mineral Brine Processing. This project aims to synthesise a new generation of engineered hierarchical membranes for novel brine processing. The key concept of the research is the precise tailoring of pores of inorganic films, forming functional meso-structures for separating salts from water. Salt crystallises perpendicular to the surface of the membrane, whilst easily removed by air, a process that can be repeated many times leading to high production rates. The hierarchical membranes will be studied to elucidate the relationships between structure, composition, surface properties and transport phenomena. The outcomes should advance brine processing separation technologies for the mineral industry (lithium, potassium, and magnesium).Read moreRead less
Development of a Model Relating Aggregate Properties with Aggregation Conditions for Design and Control Purposes. The project aims to understand the role of shear and other important parameters in the aggregation of nano- and micron-sized particles through fundamental studies on different particulate systems and shear environments. The knowledge will be used to develop an engineering model relating the floc properties to system conditions, thus allowing the utilisation of experimental data to fu ....Development of a Model Relating Aggregate Properties with Aggregation Conditions for Design and Control Purposes. The project aims to understand the role of shear and other important parameters in the aggregation of nano- and micron-sized particles through fundamental studies on different particulate systems and shear environments. The knowledge will be used to develop an engineering model relating the floc properties to system conditions, thus allowing the utilisation of experimental data to full-scale operations without eschewing their relevance. Project outcomes include a comprehensive guideline to set optimum conditions required to generate flocs with desirable properties for control and design purposes, with applicability extending from solid-liquid separation to nano-material synthesis, and various processes involving particle aggregation.Read moreRead less
Advanced Nanocomposites for Enhanced Containment of Hyper-Saline Leachate. This research project seeks to apply nanotechnology approaches to develop tailored materials that are green and cost-effective, which minimise groundwater contamination by hyper-saline industrial leachates and process waters. Australian industries will benefit from lower costs associated with storage, processing and reclamation of process waters, as well as from reduced environmental fines levied by the Environmental Prot ....Advanced Nanocomposites for Enhanced Containment of Hyper-Saline Leachate. This research project seeks to apply nanotechnology approaches to develop tailored materials that are green and cost-effective, which minimise groundwater contamination by hyper-saline industrial leachates and process waters. Australian industries will benefit from lower costs associated with storage, processing and reclamation of process waters, as well as from reduced environmental fines levied by the Environmental Protection Agency due to significantly reduced barrier failure and groundwater contaminations. Australian businesses involved in manufacture, design and construction of environmental barrier systems will have access to new materials and improved technology.Read moreRead less
Flotation in high salt concentration: resolving critical knowledge gaps relating the ion effect on bubble production and behavior. Flotation separation of coal and mineral particles by attaching to rising air bubbles is significantly affected in high salt concentration but its exact mechanism still remains unclear. This project employs state-of-the-art surface sensitive spectroscopy and modeling tools to investigate how salt ions influence drainage and rupture of liquid films between two bubbles ....Flotation in high salt concentration: resolving critical knowledge gaps relating the ion effect on bubble production and behavior. Flotation separation of coal and mineral particles by attaching to rising air bubbles is significantly affected in high salt concentration but its exact mechanism still remains unclear. This project employs state-of-the-art surface sensitive spectroscopy and modeling tools to investigate how salt ions influence drainage and rupture of liquid films between two bubbles, and bubble production and behaviour relevant to the flotation processes. The research will develop better water use for coal and mineral flotation to reduce reagent usage and environmental impacts of water pollution. The project will contribute significantly to knowledge advancement in the coal and mineral industry.Read moreRead less
The role of floc structure in the formation of sediments and filter cakes. The project aims to understand at a fundamental level if and in what way the fractal structure of aggregates of fine particles is preserved when forming sediments and filter cakes. The effect of this structure on processes for separating solids and liquids is significant: each year, millions of dollars stand to be saved though more efficient filtration, and more efficient thickening of mineral slurries. Improved understan ....The role of floc structure in the formation of sediments and filter cakes. The project aims to understand at a fundamental level if and in what way the fractal structure of aggregates of fine particles is preserved when forming sediments and filter cakes. The effect of this structure on processes for separating solids and liquids is significant: each year, millions of dollars stand to be saved though more efficient filtration, and more efficient thickening of mineral slurries. Improved understanding allows intelligent design of flocculation systems to optimise the performance of downstream solid - liquid separation processes, maximising economic and environmental returns.Read moreRead less
The development of novel geopolymers incorporating calcium and cellulosic material. Geopolymer technology transforms waste aluminosilicate materials into commercially viable products, which possess superior physical and chemical properties compared to ordinary concrete. These high-tech materials have novel acid and fire resistance applications, e.g. in construction and for the coating of optical fibres. Understanding the chemical relationship between geopolymers and other cementitious materials ....The development of novel geopolymers incorporating calcium and cellulosic material. Geopolymer technology transforms waste aluminosilicate materials into commercially viable products, which possess superior physical and chemical properties compared to ordinary concrete. These high-tech materials have novel acid and fire resistance applications, e.g. in construction and for the coating of optical fibres. Understanding the chemical relationship between geopolymers and other cementitious materials is pivotal to further advances in inorganic polymers. This project uses surface reactivity, spectroscopy, electronmicroscopy and electron diffraction to determine the role of calcium and cellulosic additives in the phase composition, microstructure and properties of geopolymers. Therefore, the factors distinguishing geopolymers from alkali-activated cement and ordinary concrete are identified.Read moreRead less