Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Floatation"”.
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A study of floatation froth behavior
In order to develop a better understanding of the role of the froth phase in coal flotation, froth stability measurements have been conducted using a continuous flotation cell. The results indicate that the mass flow rate of coal or mineral matter reporting to the product is linearly related to the …
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Pretreatment of Oilfield Produced Water using Ionic Liquids for Dissolved Air Floatation
… and carcinogenic constituents. The dissolved air floatation (DAF) process is the most widely used technique in the world for produced water treatment. In order to reach better experimental results, different coagulants are added as a pretreatment process. In this research, as a pretreatment to the …
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An evaluation of diver performance using different safety vest detonators
… the detonator knob on the diver's personal floatation device while treading water. Three shapes, three sizes, and three positions of the detonator knob were tested to determine their effects on the time it took divers to activate the emergency detonator. Three different glove conditions were …
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The fate and transport of light petroleum hydrocarbons in the Lower Mississippi River Delta
… of shoreline type on shoreline retention and re-floatation and the potential of oil- mineral aggregate formation based contributing environmental factors. Parcel tracking was used, in conjunction with detailed shoreline types correlated to flow rate, to evaluate the benefits of using multiple …
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Discourse on Lightness
… translucency, opacity, diffusion, reflection, floatation and lightness. It explores the crucial relationship of its bold tensile structure with the habitable spaces.
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Design and Application of Hollow Silica Microspheres for Density-based Bioseparations
… biomolecules from a complex sample matrix by floatation. We characterized the size and floatation properties of the hollow microspheres in aqueous solutions of increasing density and viscosity. Separation times were found to be inversely proportional to the microsphere size and directly …
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Design and application of hollow silica microspheres for density-based bioseparations
… biomolecules from a complex sample matrix by floatation. We characterized the size and floatation properties of the hollow microspheres in aqueous solutions of increasing density and viscosity. Separation times were found to be inversely proportional to the microsphere size and directly …
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Dual biopolymer production and separation from cultures of Bacillus spp.
… polymers from the culture broth, magnetic field, floatation, and sedimentation methods were investigated. Exposure to magnetic field was found to be inhibitory for P(3HB) production. The use of floatation and sedimentation for the online separation of cells with and without polymer to facilitate a …
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Direct Force Measurement between Surfaces Coated with Hydrophobic Polymers in Aqueous Solutions and the Separation of Mixed Plastics by Flotation
Froth floatation is an important process used in the mining industry for separating minerals from each other. The separation process is based on rendering a selected mineral hydrophobic using an appropriate hydrophobizing reagent (collector), so that it can selectively attach onto the surfaces of a …
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Nutritional ecology of Agalma okeni and other siphonophores from the epipelagic western North Atlantic Ocean
… posture of a siphonophore is determined by its floatation and by the contractility of its stem; fishing postures can be similar in siphonophores which are unrelated generically. Total tentacle length in colonies with 2 - 3 mg body protein can extend 4.5 meters. Variations in the morphology of …
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Optimisation of Mare's Tail coalescer technology.
… efficiency of a hydrocyclone or compact floatation unit (CFU) downstream of the Mare's Tail Coalescer. SEM2 can be used to predict the coalescence efficiency of the Mare's Tail coalescer based on the growth of oil droplet size. SEM1 was developed and tested using experimental and offshore …
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Designing and modeling of a new continuous steelmaking process
… de-S and alloy additions as well as inclusion floatation and homogenization in the Finisher would ensure a continuous stream of quality steel into the tundish.</p> <p>The invention of this work is three new refining vessels that connect the proven Consteel® EAF to a tundish, supporting fully …
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Investigation of the effect of particle size on froth stability
… experimental design as it allowed for continuous floatation system to be evaluated which resembles more industrial operations as compared to the stability column. The hybrid also incorporated the agitation zone benefits of a lab scale batch flotation cell which allows for better attachment of …
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Phenology and Management of Annual Bluegrass Weevil on Virginia Golf Courses
… two golf courses were used to compare the salt floatation and Berlese-Tullgren funnel methods of larval extraction. The methods were highly correlated (R2 = 0.7856), suggesting either method is appropriate for ABW larval extraction. Bioassays conducted on adult ABW from the same two golf courses …
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Water treatment analysis guide
… coagulation, flocculation, dissolved air floatation, sedimentation, filtration and disinfection. It also comments on the water quality that warrants certain process steps to assist the process engineer in choosing the correct configuration. For most steps the design approach of two or more …
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Applicazione delle tecniche elettrosmotiche alla consolidazione dei fanghi di risulta dei processi mineralurgici
… on a tail material deriving from the floatation of lead and zing mineral. An experimental apparatus was built consisting of a cylindrical cell with a variable volume, able to reproduce the consolidation process, both under a static load (static consolidation) and a static load plus an …
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The capillary interaction between objects at liquid interfaces
… reports numerical and analytical results on the floatation and capillary interaction of granular–sized objects at liquid–fluid interfaces. Such objects create deformations at the liquid surfaces which result in their interaction with each other. It has been experimentally shown that this effect …
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Applying Extended Reach Drilling to Optimize the Net Present Value of the Duvernay Field
Lateral length is a key well design parameter that impacts field planning, operations, hydrocarbon recovery, reserves booking and economics. Unconventional assets in North America are looking at long laterals as a potential to reduce Unit Development Costs (UDC) and maximize Net Present Value …
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An electrochemical investigation on the mechanisms of interfacial interactions of a xanthate collector on PGM surfaces in the presence of ions
… magnesium, sodium, potassium, and residual floatation reagents. These contaminants affect the process water quality, which plays a vital role in flotation efficiency. Though a significant amount of work has been done on the effects of water quality on the flotation of valuable minerals, many …
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A stepwise Study on the characterisation and processing of South African Platinum Group Tailings
… 23% copper recovery. In an effort to improve floatation, the tailings were cleaned via ultrasonication and desliming. These cleaning methods both had a detrimental effect on copper recovery. However, nickel (and therefore pentlandite) behaviour improved, showing that while the methods were …