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CreatorTitleDescriptionSubjectDate
26 Miller, Jan D.Removal of dissolved contaminants from mine drainageEleven mill tailing samples from locations throughout the Rocky Mountain region were tested for their effectiveness in removal of dissolved contaminants from mine drainage . With the exception of the sample of the Blaine Mill tailing, the average capacity of the tailings tested was 9.8 mg of iron p...Mine drainage; Mill tailing; Adsorption; Precipitation; Rocky Mountain Region1972
27 Miller, Jan D.Flotation behavior of digested Asphalt Ridge tar sandThe hot water process for Utah tar sands differs significantly from that used for Canadian tar sands due to inherent differences in respective bitumen viscosities and the nature of bitumen-sand association. These differences have led to the identification of certain design criteria necessary to ac...Tar sand; Utah; Bitumen; Hot water separation; Froth flotation1981
28 Miller, Jan D.Significance of graphitic structural features in gold adsorption by carbonThe nature of surface sites for the adsorption of gold from alkaline cyanide solutions has been investigated using samples of synthetic, highly-oriented pyrolytic graphite (HOPG). This HOPG material offers an idealized graphite structure enabling the independent study of the graphitic basal-plane ...Graphite carbons; Gold; Adsorption1992
29 Miller, Jan D.Evaluation of plantwide control strategies for coal preparation plantsThe quality of cleaned products from coal preparation plants is often variable due to natural fluctuations in the washability characteristics of the plant feed. To combat this problem, many modern plants have installed on-line analyzers that provide feedback for the real-time control of product q...Circuit; Yield; Optimization2000
30 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
31 Miller, Jan D.Particle damage and exposure analysis in HPGR crushing of selected copper ores for column leachingIn mining operations, jaw and gyratory crushers are generally used for primary crushing, and cone crushers are used for secondary crushing. During the past decade, however, High-Pressure Grinding Rolls (HPGR) are being considered due to potential processing benefits such as energy savings, improved ...2011-01-01
32 Miller, Jan D.Modulated Cr(III) oxidation in KOH solutions at a gold electrode: competition between disproportionation and stepwise electron transferThe electrochemical oxidation of aqueous Cr(III) was examined using cyclic voltammetry with a polycrystalline Au electrode in KOH solutions of varying pH and Cr(III) concentration. The mechanism and kinetics for the oxidation of Cr(III) is a quasi-reversible diffusion-controlled reaction and is larg...2011-01-01
33 Miller, Jan D.ConcentrationThe most startling development in concentration processes this past year would have to be the results obtained after magnetic treatment of aqueous systems. Beneficial effects were reported in both flotation and thickening on an industrial scale following the application of a magnetic field to ...Concentration; Aqueous systems; Pulp; Magnetic treatment1969
34 Miller, Jan D.Internal reflection spectroscopy for FTIR analysis of carboxylate adsorption by semi-soluble salt mineralsFlotation chemists have long sought to unravel the mechanisms of carboxylate collector adsorption by semi-soluble salt minerals. In particular, the adsorption density of adsorbed carboxylates, adsorption kinetics, speciation (chemisorbed, physisorbed), orientation, and conformation are of interest....Carboxylate collector adsorption; Salt minerals; Internal reflection spectroscopy1999
35 Miller, Jan D.Conformation of chemisorbed oleate at a calcite surfaceThe surface chemistry of the calcite/oleate flotation system was examined by in situ FT-NIR/IRS. Spectra of combination and overtone bands of aliphatic stretching vibrations revealed gauche/trans conformational changes that occurred solely as a function of temperature. The conformational changes wer...Chemisorption; Oleate; Calcite; Gauche/trans conformation; Rotational isomerism2001
36 Miller, Jan D.Influence of surfactants on interaction forces between polyethylene surfaces in a hydrocarbon solventThe polyolefins, mainly polyethylene and polypropylene particles, are used as an active filler material in polymer-polymer blends and are being used for the modification of asphalts to provide for high-load, low-maintenance road construction. The stability of prepared blends depends on the interact...Surfactants; Asphalt; Polymer; Polyolefins2003
37 Miller, Jan D.Surfactant adsorption density calculation from Fourier transform infrared external reflection spectroscopy (FTIR/ERS)An equation to calculate surfactant adsorption density from Fourier transform infrared external reflection spectra was established. The derivation and limitation of this equation are discussed in detail. The validation of the FTIR/ERS adsorption density equation was experimentally verified from t...Surfactant; Adsorption density; Solid film2003
38 Miller, Jan D.; Lin, Chen-LuhDevelopment of a PC, image-based, on-line particle size analyzerA PC, image-based, on-line instrument for measuring coarse particle size on a conveyor belt is under development. The hardware and software required to implement such a system are discussed, including the interface for the special image-acquisition hardware. The system concept is given with exampl...1993
39 Miller, Jan D.Dispersed oil impact on froth stability in flotationFoam stability in flotation has been studied for more than half of the last century, however, the mechanisms responsible for the defoaming action of many presently used reagents are not completely understood. This research presents oil flotation data, which may be used in the evaluation of aqueous ...Particles; Defoaming; Surfactants2001
40 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
41 Miller, Jan D.Metal ion activation in xanthate flotation of quartzQuartz cannot be floated with potassium amyl xanthate as collector at any pH. Complete flotation is achieved with certain minimal additions of amyl xanthate and Pbtt from pH 5.8 to 8.5 and with amyl xanthate and Znt+ from pH 7.5 to 8.1. The active species of these metal ions responsible for activ...pH (Chemistry); Xanthate flotation; Metal ions1965
42 Miller, Jan D.; Lin, Chen-LuhParticle size distribution for copper heap leaching operations as established from 3D mineral exposure analysis by X-ray microCTThe particle size distribution (PSD) for copper heap leaching is an important consideration in the design and operation of any copper heap leaching facility. High-resolution 3D X-ray microtomography (XMT) can be used for the direct determination of the percentage of exposed valuable mineral grains i...Particle size distribution; Leaching; X-ray microtomography2003
43 Miller, Jan D.Characterization of spherical alumina particles obtained by melting in a hydrogen-oxygen flameSpherical oxide particles can be used as mineral fillers, paint pigments, polishing materials and catalysts. They can be prepared using various techniques involving precipitation and spray drying. Melting of particles in a high-temperature flame is a simple technique which produces particles with ...Alumina; Oxides; Hydrogen-oxygen flame2003
44 Miller, Jan D.Mercury control in the cyanidation of gold oresThe control of mercury during gold cyanidation is of particular interest to the gold mining industry. Typically, mercury(II) is released as cyano complexes during leaching and follows gold through the solution concentration and purification step (carbon adsorption and electrowinning or zinc cementat...Gold cyanidation; solvation extraction; selective cementation1996
45 Miller, Jan D.; Hupka, JanPotential of air-sparged hydrocyclone flotation in environmental technologyAir-sparged hydrocyclone (ASH) flotation is a high capacity flotation technology originally developed in the Department of Metallurgical Engineering at the University of Utah for processing mineral resources. However, the technology has been found to be useful in industrial waste processing, recycli...De-inking; Capacity; Recycling1992
46 Miller, Jan D.Evaluation of a PC image-based on-line coarse particle size analyzerA PC image-based, on-line coarse particle size analysis system is being developed for the control of crushing and grinding circuits. Initial results had indicated that the system is accurate when tested with irregularly shaped particles which are stationary and do not overlap with each other. Now th...Sampling; Measurements; Analysis1993
47 Chandran, RaviMicrostructure and thermal conductivity of thermal barrier coatings processed by plasma spray and physical vapor deposition techniquesThe temperature dependence of the thermal conductivity of multilayer coatings made by a plasma spray technique as well as some coatings made by physical vapor deposition (PVD) was investigated. The multilayer coatings consisted of a varying number of layers of AI2O3 and Zr02 stabilized by 8%Y203. Pl...Thermal barrier coatings; Multilayer coatings; Plasma spray technique1996
48 Miller, Jan D.; Wan, Rong YuSignificance of carbon properties in the enhanced ferric sulfate leaching of CuFeS2/C aggregatesAcid ferric sulfate solution has been used for heap and dump leaching of low-grade chalcopyrite ores and is being considered as a possible lixiviant for the hydrometallurgical processing of copper sulfide concentrates. For many years, researchers have attempted to explain the leaching behavior of ch...Ferric sulfate; CuFeS2; Particulate carbon1984
49 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
50 Miller, Jan D.Reaction kinetics of bismuth dissolution from lead cake by sulfuric acid leachingLead cake, a zinc smelter flue dust residue, consists primarily of lead sulfate. Characteristic properties of lead cake were determined in order to aid the understanding of reaction mechanisms involved in bismuth removal from lead cake by sulfuric acid digestion. Sp gr (specific gravity) measuremen...Lead cake; Smelter flue; Lead sulphate; Bismuth; Sulfuric acid1978
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