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Creator | Title | Description | Subject | Date |
| 101 |
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Miller, Jan D.; Herbst, John A.; Lin, Chen-Luh | Development of a multicomponent-multisize liberation model | This paper is concerned with the development of a kinetic model for mineral liberation by grinding. Existing population balance size reduction models are extended to include two minerals with an arbitrary number of locked particle fractions. The validity of this approach to liberation modelling is d... | Population balance; size reduction; liberation; grinding model | 1985 |
| 102 |
 |
Miller, Jan D. | Importance of bitumen viscosity in the hot-water processing of domestic tar sands | The 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 processing | 1983 |
| 103 |
 |
Miller, Jan D.; Lin, Chen-Luh; Yu, Qiang | PC image-based analysis system for particle characterization of deinked pulps | A 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 analysis | 1993 |
| 104 |
 |
Miller, Jan D.; Wan, Rong Yu | Research and development activities for the recovery of gold from noncyanide solutions | Although 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; Lixiviants | 1993 |
| 105 |
 |
Miller, Jan D. | Electrochemistry in silver catalysed ferric sulfate leaching of chalcopyrite | Previous investigations have demonstrated the catalytic effect of silver additions in the ferric sulfate leaching of chalcopyrite. CuFeS2 + 4Fe+3 > Cu++ + 5Fe++ + 2S° The enhanced rate of leaching was found to be due to the formation of an intermediate Ag2S film which forms on the CuFeS2 surf... | Reaction; Sulfur; Elemental | 1981 |
| 106 |
 |
Miller, Jan D. | Fluoride activation in oleate flotation of collophanite | Fluoride 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; Chemisorption | 1987 |
| 107 |
 |
Miller, Jan D. | Significance of electrokinetic characterization for interpreting interfacial phenomena at planar, macroscopic interfaces | Streaming potential measurements provide valuable information for the validation and interpretation of interfacial phenomena that occur at flat macroscopic surfaces. Planar substrates have been extensively used for the interpretation of events, which occur at particulate surfaces; however, these fla... | Interfacial phenomena; Surface charge | 2005 |
| 108 |
 |
Miller, Jan D. | Applications of X-ray computed tomography in particulate systems | X-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; Intensity | 1992 |
| 109 |
 |
Miller, Jan D.; Wan, Rong Yu | Enhanced ferric sulphate leaching of copper from CuFeS2 and C particulate aggregates | Significantly faster leaching kinetics for ferric sulphate are achieved for particulate aggregates of CuFeS2 and C than for CuFeS2 itself. The effect of carbon particles upon the rate of dissolution of chalcopyrite has been increased by a factor of 4 (after 10 hours' leaching), depending upon the ... | Reaction; Chalcopyrite; Electrochemical | 1984 |
| 110 |
 |
Miller, Jan D.;Yu, Qiang | Fossil resin, a value-added product from western coal | Certain 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; Hydrogenation | 1992 |
| 111 |
 |
Miller, Jan D. | Surface characterization and new tools for research | In 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 angle | 2007 |
| 112 |
 |
Miller, Jan D. | Surface chemistry of pulping and flotation for mixed office wastepaper | The effect of pulping reagents on the de-inking flotation of laser printed wastepaper was investigated with regard to the removal efficiency of toner and mineral filler particles at different pH values. These results show that caustic pulping causes the toner to be released from the fibers as larg... | Pulping reagents; Deinking; Toner; Mineral fillers | 1997 |
| 113 |
 |
Miller, Jan D. | Effect of feed source in the hot water processing of Utah tar sand | The processing strategy for the effective separation of bitumen from low grade (K.10 weight percent bitumen) Utah tar sands by a hot water process differs significantly from that used for the processing of high grade (> 10 weight percent bitumen) Utah tar sands. Excellent separations (coefficient o... | Tar sand; Utah; Bitumen; Hot water separation; Froth flotation | 1980 |
| 114 |
 |
Miller, Jan D. | Understanding the role of ion interactions in soluble salt flotation | There is anecdotal evidence for the significant effects of salt ions on the flotation separation of minerals using process water of high salt content. Examples include flotation of soluble salt minerals such as potash, trona and borax in brine solutions. Although some of the effects are expected, so... | | 2011-01-01 |
| 115 |
 |
Miller, Jan D.; Lin, Chen-Luh | Capillary network model for filter cake based on pore structure analysis | Dewatering of fine coal by continuous filtration involves filter cake formation and removal of surface moisture by drawing air through the capillaries of the cake. In order to gain a better (understanding of the complex transport phenomena that occur in the filter cake, analysis of the effect of t... | Pore geometry; Transport properties; Microtomography | 1996 |
| 116 |
 |
Miller, Jan D.; Yost, Garold S.; Veranth, John M. | Novel method to detect unlabeled inorganic nanoparticles and submicron particles in tissue by sedimentation field-flow fractionation | A novel methodology to detect unlabeled inorganic nanoparticles was experimentally demonstrated using a mixture of nano-sized (70 nm) and submicron (250 nm) silicon dioxide particles added to mammalian tissue. The size and concentration of environmentally relevant inorganic particles in a tissue sa... | Sedimentation field-flow fractionation; Transmission electron microscopy; Tissue digestion | 2008 |
| 117 |
 |
Miller, Jan D. | Interaction forces between toner surfaces | The interaction of toner particles in aqueous solution is of interest with regard to both fundamental and practical aspects of de-inking processes. It has been established for the toner studied that the toner polymeric resin, that is, the block copolymer styrene-methyl methacrylate, more specifical... | Interaction forces; toner surfaces; PMMA | 2000 |
| 118 |
 |
Miller, Jan D. | Noncyanide leaching of an auriferous pyrite ore from Ecuador | Gold leaching of an auriferous pyrite ore from the Portovelo deposit in Ecuador indicates that noncyanide leaching systems, such as thiocyanate and thiourea, are not as effective as the traditional cyanide system. For example, whereas approximately 95% of the gold can be leached from the ore with cy... | Gold leaching; Refractory ores; Thiocyanate; Thiourea | 2000 |
| 119 |
 |
Miller, Jan D. | Three dimensional analysis of particulates in mineral processing systems by cone beam X-ray microtomography | In general, X-ray-computed tomographic (CT) techniques are capable of providing three-dimensional images of the internal structure of opaque materials in a nondestructive manner. The unique cone beam geometry allows acquisition of all two-dimensional projections with only one rotation of the sample,... | Cone beam CT; X-ray microtomography; Liberation analysis; Particle shape; Heap leaching; Exposure analysis; Coal washability | 2004 |
| 120 |
 |
Miller, Jan D. | Hydroxamate vs. fatty acid flotation of iron oxide | Data were obtained with hematite with octyl hydroxamate and oleate as collectors to determine the mechanism of collector adsorption and also to establish the roles that conditioning time and temperature assume in this system. The presence of hydroxy complexes of iron are apparently necessary for che... | Iron ore; Iron; Fatty acid; Hydroxy complexes | 1970 |
| 121 |
 |
Miller, Jan D. | Hydrometallurgy | The 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 practice | 1972 |
| 122 |
 |
Miller, Jan D. | Analysis of the surface potential developed by non-reactive ionic solids | The sign of the surface potential for complex non-reactive ionic solids cannot be predicted solely from consideration of the hydration energy of gaseous ions which constitute the ionic lattice. Accurate analysis of these systems must involve the hydration energy of surface ions, which requires knowl... | Lattice; dipole; Madelung Constants | 1976 |
| 123 |
 |
Miller, Jan D. | Chemical utilization of sequestered carbon dioxide as a booster of hydrogen economy | For many, hydrogen in a pure hydrogen economy would be like natural gas in today's energy economy. Unfortunately, hydrogen's physical properties are unsuited to the energy market's requirements in terms of packaging, storage, transfer, and delivery. In this paper, a hybrid energy economy that packag... | | 2008-01-01 |
| 124 |
 |
Miller, Jan D.; Herbst, John A. | Factors affecting droplet size distributions produced in dispersed phase mixers | Droplet 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; Agitating | 1981 |
| 125 |
 |
Miller, Jan D. | Development of the air-sparged hydrocyclone - a swirl-flow flotation column | From laboratory research activities during the past five years, it is now evident that effective flotation separations can be achieved with the high-capacity air-sparged hydrocyclone. | Air-sparged hydrocyclone; Froth core | 1988 |
