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Creator | Title | Description | Subject | Date |
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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 |
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Miller, Jan D. | Methodology for detailed liberation analysis in mineral processing technology | A transformation equation can be used to describe the relationship between the one, two and three dimensional information regarding the composition of mineral particles of specified size. Linear or areal grade distributions f(gi) can be transformed to an estimate of the volumetric grade distribution... | Volumetric grade; Grade; Distribution | 1986 |
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Miller, Jan D. | Concentration | The 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 treatment | 1969 |
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Miller, Jan D. | Experimental evaluation of a mineral exposure model for crushed copper ores | Copper 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; Distribution | 2006 |
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Miller, Jan D. | Further considerations of magnetic deinking for wastepaper recycling mills | Magnetic 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 |
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Miller, Jan D. | Flotation chemistry of nonsulfide minerals | The 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 adsorption | 2002 |
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Miller, Jan D. | Metal ion activation in xanthate flotation of quartz | Quartz 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 ions | 1965 |
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Miller, Jan D.; Lin, Chen-Luh | Particle size distribution for copper heap leaching operations as established from 3D mineral exposure analysis by X-ray microCT | The 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 microtomography | 2003 |
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Miller, Jan D. | Molybdenite flotation from copper/molybdenum concentrates by ozone conditioning | Typically, 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 conditioning | 1990 |
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Miller, Jan D. | Microscopic observations of bitumen spreading at gas bubble surfaces | Bitumen 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 bubbles | 1995 |
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Miller, Jan D.; Lin, Chen-Luh | Flotation recovery of high-purity gibbsite concentrates from a Brazilian bauxite ore | Recently 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; Alumina | 1990 |
12 |
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Miller, Jan D.; Lin, Chen-Luh | 3D analysis of particulates in mineral processing systems by cone beam X-ray microtomography | In general, x-ray computed tomographic (CT) techniques are able to provide 3D images of the internal structure of opaque materials in a nondestructive manner. The unique cone beam geometry allows acquisition of all 2D projections with only one rotation of the sample thus providing for fast data acqu... | X-ray microtomography; Liberation; Heap leaching; Exposure analysis; Coal washability | 2003 |
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Miller, Jan D. | Characterization of interfacial water at hydrophilic and hydrophobic surfaces by in situ FTIR/internal reflection spectroscopy | In-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 crystals | 1995 |
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Miller, Jan D. | Critical review of wetting and adhesion phenomena in the preparation of polymer-mineral composites | The 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; Adhesion | 1995 |
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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 |
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Miller, Jan D. | Nonsulfide flotation technology and plant practice | There 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 plants | 2002 |
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Rajamani, Raj | Online SAG mill pulse measurement and optimization semi-annual technical progress report | The grinding efficiency of semi autogenous milling or ball milling depends on the tumbling motion of the total charge within the mill. Utilization of this tumbling motion for efficient breakage of particles depends on the conditions inside the mill. However, any kind of monitoring device to measure... | | 2006 |
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Miller, Jan D.; Nalaskowski, Jakub | Flotation chemistry and technology of nonsulfide minerals | The 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 minerals | 2007 |
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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 |