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CreatorTitleDescriptionSubjectDate
51 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
52 Miller, Jan D.Applications of X-ray computed tomography in particulate systemsX-ray computed tomography (CT) is an ideal technique for investigating the internal structure of multiphase materials in a noninvasive and nondestructive manner. CT technology used in conjunction with specialized algorithms and advanced computer facilities can be used to provide quantitative informa...Algorithms; Beam; Intensity1992
53 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
54 Miller, Jan D.Solvent extraction reagents for gold recovery from alkaline cyanide solutionsThree different solvent extraction systems for the recovery of gold from alkaline cyanide solutions are reviewed. These include the modified amine extractants in which the basicity of simple alkyl amines, with respect to the aurocyanide anion, is controlled by the addition of alkyl phosphorous ester...Solvents; Extraction; Gold; Alkaline cyanide; Amine extractants; Solvating extractants; Substituted guanidines1993
55 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
56 Miller, Jan D.Surface phase transitions of adsorbed collector molecules as revealed by in-situ FT-IR/IRS spectroscopyIt has been shown by inspection of FT-IR/IRS spectra that the alkyl conformation of adsorbed collectors can be determined. The conformations of adsorbed collectors were interpreted in terms of bulk solution phases of the collectors. Such analysis was performed on the CaF2/oleate, A1203/SDS and KC1/...Oleates; Micellar; In situ analysis; Adsorption1993
57 Miller, Jan D.Multiphase flow characteristics of gas sparged hydrocyclone flotation deinkingA new high-efficiency technology has been developed for flotation deinking of various wastepaper grades. The GSC gas sparged hydrocyclone is a centrifugal device that operates at consistencies of 1 to 3 percent and uses conventional flotation chemistry. Research and development efforts have continue...Wastepaper; Deinking; Gas sparged hydrocyclone flotation deinking1993
58 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
59 Miller, Jan D.; Lin, Chen-Luh; Yu, QiangPC image-based analysis system for particle characterization of deinked pulpsA low cost PC image-based particle analysis system is being developed for particle characterization of deinked pulps at the University of Utah. Initial R&D efforts of such an image analysis system were made for on-line particle characterization in the mineral processing field but now it has been fo...Deinking; Paper pulp; Wastepaper; Image-based particle analysis1993
60 Miller, Jan D.; Wan, Rong YuResearch and development activities for the recovery of gold from noncyanide solutionsAlthough most gold production from primary resources is achieved by cyanidation, many research activities have focused on alternative processes using noncyanide lixiviants. Such research has been prompted by environmental concerns and problems associated with the processing of refractory gold ores. ...Activated carbon adsorption; Cementation; Solvent extraction; Ion exchange; Reduction-precipitation; Halide solutions; Thiourea solutions; Lixiviants1993
61 Miller, Jan D.Tar sand pretreatment with diluentImportant aspects of kerosene penetration into tar sand have been investigated. The natural tar sand porosity was measured and used to analyze the performance of the hot water process. Subsequently, pretreatment experiments, using 20-kg tar sand samples (Asphalt Ridge and Whiterocks, Utah) and ker...Tar sand; Kerosene; Porosity; Temperature1993
62 Miller, Jan D.; Lin, Chen-LuhScientific visualization in mineral and material processingScientific visualization is an ideal methodology for investigating complex phenomena that are characterized by large amounts of data. Furthermore, it is invaluable in the study of processes that evolve in time. Scientific visualization relies heavily on computer graphics, image processing and video...Air sparged hydrocyclone flotation; Ball mill grinding; Tomography; Computer graphics1993
63 Miller, Jan D.Preliminary evaluation of air-sparged hydrocyclone technology for scavenger flotation of Western phosphatesThe sedimentary western phosphate deposits of Idaho, Montana, Utah, and Wyoming tend to be calcareous and generally carry a significant amount of dolomite along with collophanite. In some cases, such as the Smokey Canyon Mine, Afton, Wyoming, the ore will also contain mudstone, and in this case the ...Collophanite; hydrosizer; scavenger concentrate1993
64 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
65 Miller, Jan D.;Yu, QiangSolvent refining of coal resin concentratesCertain bituminous coals of the western United States are known to contain appreciable quantities of macroscopic resinite (fossil resin). Such resinous coals are found in the states of Arizona, Colorado, New Mexico, Utah, Washington, Wyoming, etc. Among these, the Wasatch Plateau coal field in ce...1994
66 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
67 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
68 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
69 Miller, Jan D.Critical review of wetting and adhesion phenomena in the preparation of polymer-mineral compositesThe wetting behavior of liquid polymers at solid surfaces and the adhesion forces involved at polymer-filler interfaces should always be considered in the preparation of high-quality polymer composites, including those made with mineral fillers. Spontaneous polymer spreading over the filler surface...Polymer-minerals; Composites; Wetting; Adhesion1995
70 Miller, Jan D.Microscopic observations of bitumen spreading at gas bubble surfacesBitumen spreading at gas bubble surfaces was observed through a stereoscopic microscope for Whiterocks oil sand samples submerged in alkaline solutions. This phenomenon was also observed for model systems where air bubbles were placed al the surface of bitumen-coated quartz slide. Finally, the film ...Hydrophobic minerals; Oil sand; Gas bubbles1995
71 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
72 Miller, Jan D.; Lin, Chen-LuhOn-line washability analysis for the control of coarse coal cleaning circuitsIn view of the success of recent laboratory studies using X-ray computed tomography (CT) to determine coal washability and with the availability of high-speed CT systems, it now seems possible to design an on-stream washability system for the control of coarse coal-cleaning circuits. Design features...On-stream washability; CT analyzer; Coal washability1995
73 Miller, Jan D.Characterization of interfacial water at hydrophilic and hydrophobic surfaces by in situ FTIR/internal reflection spectroscopyIn-situ FTIR/internal reflection spectroscopy (FTIR/IRS) has been used to spectroscopically characterize interfacial water near hydrophilic (silicon single crystal) and hydrophobic (polymer-coated germanium single crystal) surfaces. Interfacial water was examined spectroscopically over certain dista...Interfacial water; hydrophilic surfaces; Hydrophobic surfaces; Internal reflection spectroscopy; Silicon crystals; Germanium crystals1995
74 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
75 Miller, Jan D.Interaction forces between ink particles, cellulose fibers and mineral fillers as determined by AFMRecycling of wastepaper is an important industrial activity for the conservation of our natural resources. Wastepaper is mostly generated from newspaper and office waste (from photocopiers and laser printers) [1]. One important step in wastepaper recycling is the separation of ink from cellulose...Solution; Wastepaper; Chemistry1996
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