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CreatorTitleDescriptionSubjectDate
51 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
52 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
53 Miller, Jan D.Evaluation of stucco binder for agglomeration in the heap leaching of copper oreIt is known that the presence of excess fines in heap leaching operations may cause low recovery due to reduced heap permeability and/or channeling of lixiviant flow. These problems are mitigated to some extent by agglomeration pretreatment prior to heap leaching. Sulfuric acid leach solution is the...2011-01-01
54 Chandran, RaviEvolution of microstructure and phases in in-situ processed Ti-TiB composites containing high volume fractions of TiB whiskersA series of titanium composites, with varying volume fractions of titanium monoboride (TiB) whiskers, were made by mixing various proportions of titanium (Ti) and titanium diboride (TiB2) powders followed by hot pressing. The phases present were identified by x-ray diffraction.Morphology; diffraction; relative intensity1999
55 Miller, Jan D.Experimental evaluation of a mineral exposure model for crushed copper oresCopper mineral inclusions dispersed in crushed ore particles have a certain size distribution (grain-size distribution). For efficient heap leaching processes, the crushing plant should be designed and operated to crush the ore to an appropriate particle-size distribution so that copper mineral grai...Grains; Particles; Distribution2006
56 Miller, Jan D.; Herbst, John A.Factors affecting droplet size distributions produced in dispersed phase mixersDroplet size distributions were determined by stabilizing in gelatin and measurement of the distributions by means of computerized image analysis. Several variables that affect droplet sizes were studied and the resulting size distributions were modeled via a population balance equation. Key paramet...Gelatin; Phases; Agitating1981
57 Miller, Jan D.Fast flotation with an air-sparged hydrocycloneThe status of the research programme on air-sparged hydrocyclones at the University of Utah is presented. Fast flotation of coal, oil shale, and copper porphyry ore has been demonstrated with capacities far exceeding those of conventional flotation cells. In addition to the performance characteris...Cells; Capacity; Froth1984
58 Miller, Jan D.Fine coal flotation in a centrifugal field with an air sparged hydrocyclonePreliminary results are reported regarding the design and development of a pilot scale air sparged hydrocyclone for cleaning fine coal 590 \xm ("28 mesh) containing 24% ash and 1.6% sulfur. The principle of separation is the flotation of hydrophobic coal particles in the centrifugal field generated...rocyclones; Coal; Separation technology1982
59 Miller, Jan D.; Lin, Chen-LuhFine coal washability-liberation analysis by cone-beam X-Ray microtomographyA new method based on cone-beam x-ray microtomography is described for direct determination of the three-dimensional liberation spectrum of multiphase particles 100 microns in size or less. Such a technique may provide the basis for more detailed and accurate washability analysis in fine coal chara...Spectrum; Sink-float; Density1996
60 Miller, Jan D.Flotation behavior of chromium and manganese mineralsFlotation behavior of chromite and manganese-bearing minerals has been reviewed. Flotation of these minerals and ores with fatty acids, amines, sulfates, sulfonates and hydroxamates has been presented and is discussed in terms of surface charge and chemical interaction between the mineral surface ...Concentration; Chromite; Deposits1986
61 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
62 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
63 Miller, Jan D.Flotation chemistry of nonsulfide mineralsThe dimensions of nonsulfide flotation technology extend in many different directions, as might be expected from the diversity of t he mineral classes, which include soluble salt minerals (potash, borax, and trona), semi-soluble salt minerals (phosphate minerals, fluorite, calcite, and barite), ins...Nonsulfide minerals; Hydrophobic surface state; Oleate adsorption2002
64 Miller, Jan D.Flotation chemistry of soluble salt minerals: from ion hydration to colloid adsorptionIn this paper, recent progress with respect to the flotation chemistry of soluble salt minerals is reviewed, and some of the more relevant issues including the hydration states of ions, the interfacial phenomena of salt surfaces and the flotation behavior of selected soluble salts are discussed. Due...2014-01-01
65 Miller, Jan D.Flotation of boron minerals: discussionExperimental flotation/bubble attachment results for 21 different alkali halides (Yalamanchili et al., 1993; Yalamanchili and Miller, 1994b) confirmed that the flotation response of soluble salt minerals with weak electrolyte collectors can best be explained by the adsorption of oppositely charged ...Flotation; Boron minerals; Salts; Adsorption1994
66 Miller, Jan D.; Lin, Chen-LuhFlotation recovery of high-purity gibbsite concentrates from a Brazilian bauxite oreRecently research efforts have been made to obtain a high-purity gibbsite concentrate, suitable for first-class alumina refractories, from a Brazilian bauxite ore containing gibbsite (50%), quartz (35%),and kaolinite (15%). Detailed polished-section microprobe analysis was used to describe the ...Gibbsite; Alumina1990
67 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
68 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
69 Miller, Jan D.;Yu, QiangFossil resin, a value-added product from western coalCertain bituminous coals of the western United States are known to contain appreciable quantities of macroscopic fossil resin (resinite). Such resinous coals are found in the states of Arizona, Colorado, New Mexico, Utah, Washington, Wyoming, etc. The Wasatch Plateau coal field in Utah (Figure 1)...Resinite; Solvent refining; Wasatch Plateau; Hydrogenation1992
70 Chandran, RaviFracture toughness of two Cr2Hf+Cr intermetallic composites as a function temperatureFracture toughness as a function of temperature was evaluated for two Cr2Hf+Cr intermetallic composites, each in two different microstructural conditions. The proeutectic microstructures based on Cr-6.5Hf (at%) showed a significant increase in fracture toughness with an increase from room temperatur...Fracture toughness; Fracture resistance; Intermetallic composites; Proeutectic microstructures; Eutectic microstructures1994
71 Miller, Jan D.Free and emulsified oil removal by bubble accelerated flotation (BAF)Operational data from full-scale field applications and pilot tests using the Bubble Accelerated Flotation ( B A R system for the treatment of wastewater are presented. The compact BAF system based on the air-sparged hydrocyclone technology was designed to remove pollutants from industrial waste and...Bubble accelerated flotation; Air-sparged hydrocyclone; Flocculants; Oil-in-water emulsion1999
72 Miller, Jan D.Further considerations of magnetic deinking for wastepaper recycling millsMagnetic de-inking has been shown to be an efficient process for the removal of certain toner particles from mixed office waste (MOW) furnishes. It is possible to achieve a dirt removal of 96% with the WHIMS (wet high intensity magnetic separator) if all toner particles present in the furnish are at...Magnetic deinking; Paper pulp; Wastepaper; Mixed office waste; (MOW)1998
73 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
74 Miller, Jan D.High resolution X-ray microtomography based micro finite element analysis of mechanical properties of cellular materialThe macroscopic mechanical (elastic) properties of closed foams (ROHACELL) estimated from micro finite element analysis are reported in this paper. The complex 3D geometries of ROHACELL foams with different densities were analyzed using high resolution X-ray microtomography (HRXMT). The microstructu...2013-01-01
75 Miller, Jan D.HydrometallurgyThe science and technology of hydrometallurgy and chemical processing continues to advance both at the laboratory level and in plant practice. In past decades, hydrometallurgy was rather limited in scope and received relatively little attention, being largely a laboratory curiosity. But curiosity i...Hydrometallurgy; Chemical processing; Environment; Laboratory practice; Plant practice1972
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