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Creator | Title | Description | Subject | Date |
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Miller, Jan D.; Lin, Chen-Luh | Development of a PC, image-based, on-line particle size analyzer | A 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 |
2 |
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Miller, Jan D. | Evaluation of a PC image-based on-line coarse particle size analyzer | A 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; Analysis | 1993 |
3 |
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Jarrard, Richard D. | Geometry of Pleistocene facies on the Great Barrier Reef outer shelf and upper slope - seismic stratigraphy of sites 819, 820, and 821 | Seismic stratigraphic analysis of the sedimentary succession intersected in Ocean Drilling Program (ODP) Sites 819, 820, and 821, on the outer shelf and upper slope seaward of the Great Barrier Reef, provides a clear indication of the importance of sediment supply and depositional base-level as two ... | | 1993 |
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Miller, Jan D. | Multiphase flow characteristics of gas sparged hydrocyclone flotation deinking | A 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 deinking | 1993 |
5 |
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Jarrard, Richard D. | Origin of seismic reflectors within carbonate-rich sediments from northeastern Australian margin | We use continuous velocity records from 12 sites and continuous density records from 9 sites from Ocean Drilling Program (ODP) Leg 133 to examine both direct and indirect controls on seismic reflectors and depth-to-time conversion for the northeastern Australian margin. In these carbonate-rich sedim... | | 1993 |
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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 |
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Miller, Jan D. | Preliminary evaluation of air-sparged hydrocyclone technology for scavenger flotation of Western phosphates | The 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 concentrate | 1993 |
8 |
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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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Jarrard, Richard D. | Resistivity/porosity/velocity relationships from downhole logs: an aid for evaluating pore morphology | Relationships between downhole resistivity/velocity logs and porosity styles, controlled by cementation/dissolution/recrystallization, are investigated using core and downhole logging data from the carbonate-rich sediments encountered during Leg 133 of the Ocean Drilling Program (ODP), northeastern ... | | 1993 |
10 |
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Miller, Jan D.; Lin, Chen-Luh | Scientific visualization in mineral and material processing | Scientific 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 graphics | 1993 |
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Jarrard, Richard D. | Sedimentology and downhole log analysis of Site 820, central Great Barrier Reef outer shelf: the factors controlling Pleistocene progradational and aggradational seismic geometry | The textural and compositional characteristics of the 400 m sequence of Pleistocene wackestones and packstones intersected at Ocean Drilling Program (ODP) Site 820 reflect deposition controlled by fluctuations in sea-level, and by variations in the rate of sediment supply. The development of an effe... | | 1993 |
12 |
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Miller, Jan D. | Solvent extraction reagents for gold recovery from alkaline cyanide solutions | Three 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 guanidines | 1993 |
13 |
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Miller, Jan D. | Surface phase transitions of adsorbed collector molecules as revealed by in-situ FT-IR/IRS spectroscopy | It 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; Adsorption | 1993 |
14 |
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Miller, Jan D. | Tar sand pretreatment with diluent | Important 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; Temperature | 1993 |
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Jarrard, Richard D. | Velocity and density of carbonate-rich sediments from northeastern Australian margin: integration of core and log data | During Ocean Drilling Program (ODP) Leg 133, shipboard scientists obtained a remarkable quantity of both core and log measurements of the physical properties of carbonate-rich sediments. This suite of measurements provides a unique opportunity to evaluate the robustness of each measurement technique... | | 1993 |