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Filters: Collection: "ir_uspace" Subject: "Flotation"
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1 Miller, Jan D.Surface characterization and new tools for researchIn the selective separation of mineral phases by flotation, surface chemistry is the principal determinant of the average contact angle for a specific mineral phase in flotation pulp. The average contact angle is, in turn, the principal determinant of the bubble-particle attachment efficiency in th...Flotation; Minerals; Surface chemistry; Contact angle2007
2 Miller, Jan D.Infrared spectroscopy for in-situ characterization of surface reactionsInfrared spectroscopy has been one of the most useful experimental techniques for the analysis of surface reactions in flotation systems, including surface alteration and surfactant adsorption reactions. With the advent of Fourier transform infrared (FTIR) spectrometers, many low-energy throughpu...Reflection; Flotation; Measurements1989
3 Miller, Jan D.Molybdenite flotation from copper/molybdenum concentrates by ozone conditioningTypically, rougher molybdenite flotation and recovery from bulk copper/molybdenum concentrates involves the use of alkalisulfides, Nokes reagents, cyanides, oxidants, and/or thermal treatment to depress copper sulfide minerals. The bulk copper/molybdenum feed generally varies from 0.2% Mo to 1.0% M...Molybdenum; Copper; Flotation; Ozone conditioning1990
4 Miller, Jan D.Flow phenomena and its impact on air-sparged hydrocyclone flotation of quartzFluid flow phenomena and therefore the flotation efficiency of air-sparged hydrocyclone (ASH) flotation are strongly dependent on operating and design variables such as air and slurry flow rates, underflow and overflow opening areas, percent solids of the feed, reagent levels, particle size and ASH...Quartz; Flotation; Hydrocyclones1995
5 Miller, Jan D.Pilot-plant evaluation of a water insoluble hydroxamic acid collector for single stage flotation of Florida phosphate rockRecent laboratory results have demonstrated that selective flotation of phosphate rock can be achieved in a single stage with improved separation efficiency when compared to the standard double float process. The new reagent chemistry is based on the use of a water insoluble alcoholic solution of ...Phosphate rock; Flotation; Double float; Separation2006
6 Miller, Jan D.Bench scale flotation of sedimentary phosphate rock with hydroxamic acid collectorsIt has been discovered that water insoluble alcoholic solutions of alkyl hydroxamic acids serve as selective collectors for the flotation of phosphate mineral resources. The effectiveness of the new collector chemistry has been demonstrated by the results from single stage bench scale flotation exp...Flotation; Insoluble collectors; Hydroxamic acid; Alcohol; Phosphate rock; High solids conditioning; Particle size2002
7 Miller, Jan D.Selective flotation of iron oxideThe response of pure goethite and two natural iron ores to flotation with potassium octyl hydroxamate is presented. The ores contained 12.5% and 39.7% iron; concentrates containing 69.5% and 61.5% iron, respectively, were obtained with additions of 0.4 lb/ton hydroxamate.Goethite; Iron; Flotation; Iron Oxide1967
8 Miller, Jan D.Gold flotation from Colorado River sand with the air-sparged hydrocyclonePilot-scale tests indicate that effective concentration of fine gold from Colorado River sands can be achieved by flotation with the air-sparged hydrocyclone. The fine sands (55% -kOQ mesh and 0 01 opt *) from gravity concentration were processed with a 5-cm air-sparged hydrocyclone (capacity -1.0 t...Gold; Hydrocyclones; Sand; Flotation1986
9 Miller, Jan D.Importance of bitumen viscosity in the hot-water processing of domestic tar sandsThe separation efficiency of the hot water digestion-flotation technique used for bitumen recovery from various domestic tar sands was evaluated. Bitumen viscosity was found to be the most important tar sand property in determining the success of the bitumen separation. Bitumen viscosity of the tar ...Tar sand; Bitumen viscosity; Flotation; Hot-water processing1983
10 Miller, Jan D.Effect of ink types and printing processes on flotation deinkingExamination of ink types reveals that newsprint oil-based offset-cold and offset-heat inks contain substantial oil (45 to 60%) and resin (5 to 35%), water-based ink contains water (40%) and resin (polystyrene, 30%). These inks are liquids with densities around 1 g/cm3, having various viscosities...Toners; Inks; Photocopying; Laser printing; Flotation; Deinking; Recycling; Office waste; Hyrdophobicity1997
11 Miller, Jan D.; Nalaskowski, JakubFlotation chemistry and technology of nonsulfide mineralsThe dimensions of nonsulfide flotation technology extend in many directions, as might be expected from the diversity of the mineral classes, which include soluble salt minerals (potash, borax, and trona), semisoluble salt minerals (phosphate minerals, fluorite, calcite, and barite), and insoluble ox...Flotation; Insoluble collectors; Salt minerals; Nonsulfide minerals2007
12 Miller, Jan D.Hydrophobic character of semisoluble salt minerals with oleate as collectorThe effects of temperature, oxygen partial pressure, and solution chemistry can have a significant effect on the hydrophobic character of semisoluble salt minerals with adsorbed oleate. Measurements of bubble-attachment time and contact angle reveal the sensitivity of these hydrophobic surfaces to c...Flotation; Solution; Oleate1984
13 Miller, Jan D.Thermogravimetric/Mass spectrometric (TG/MS) characterization of toner particles from photocopied wastepaper and the impact of these features on flotation deinkingFlotation deinking of photocopies from office waste is known to be much more difficult than the flotation deinking of newsprint. In this regard, research has been undertaken to better understand the phenomena which account for the poor efficiency in the flotation deinking of such office waste. Durin...Photocopied paper; Recycling; Deinking; Flotation; Thermal decomposition; Thermogravimetry; Mass spectrometry; Differential scanning calorimeter; Toner particles1995
14 Miller, Jan D.Axial flow reversal and its significance in air-sparged hydrocyclone (ASH) flotationIn recent years the potential of air-sparged hydrocyclone (ASH) flotation for fine coal cleaning has been demonstrated both in pilot plant testing and in a plant-site demonstration program. Further improvements in the ASH technology will depend, to some extent, on improved understanding of the co...Flotation; zero axial velocity; computational fluid dynamics1995
15 Miller, Jan D.Fluoride activation in oleate flotation of collophaniteFluoride activation has been evaluated by Hallimond tube flotation of collophanite in terms of fluoride concentration, conditioning time, pH, and temperature. The results reveal that efficient oleate flotation of collophanite can be achieved by fluoride activation. Experimental results of fluoride...Fluoride; Oleate; Collophanite; Flotation; Calcium; Chemisorption1987
16 Miller, Jan D.New developments in mixing, flocculation and flotation for industrial wastewater pretreatment and municipal wastewater treatmentSolid/liquid separations are commonly the first step in any wastewater treatment. Such technologies are mature and new developments are rare. However, in the last decade some significant improvements in separation techniques for industrial waste water pretreatment have been implemented. Advances in ...Wastewater treatment; Flocculation; Flotation; Industrial wastewater pretreatment; Sludge thickening; Mixing2005
17 Miller, Jan D.Nonsulfide flotation technology and plant practiceThere are hundreds of nonsulfide mineral flotation plants throughout the United States, and most have a plant design that depends upon the specific ore characteristics and the market specifications for their product. There is no common thread of technology between the design and processing of diffe...Flotation; Minerals; Processing plants2002
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