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Filters: Department: "Metallurgical Engineering" School Or College: "College of Mines & Earth Sciences" Collection: "ir_uspace" Format: "application/pdf"
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101 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 fractionationA 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 digestion2008
102 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
103 Rajamani, RajOnline SAG mill pulse measurement and optimization semi-annual technical progress reportThe 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
104 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
105 Miller, Jan D.Particle damage and exposure analysis in HPGR crushing of selected copper ores for column leachingIn mining operations, jaw and gyratory crushers are generally used for primary crushing, and cone crushers are used for secondary crushing. During the past decade, however, High-Pressure Grinding Rolls (HPGR) are being considered due to potential processing benefits such as energy savings, improved ...2011-01-01
106 Miller, Jan D.Particle interactions in kaolinite suspensions and corresponding aggregate structuresThe surface charge densities of the silica face surface and the alumina face surface of kaolinite 13 particles, recently determined from surface force measurements using atomic force microscopy, 14 show a distinct dependence on the pH of the system. The silica face was found to be negatively 15 char...2011-01-01
107 Miller, Jan D.; Lin, Chen-LuhParticle size distribution for copper heap leaching operations as established from 3D mineral exposure analysis by X-ray microCTThe 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 microtomography2003
108 Miller, Jan D.Particle size segregation on a belt conveyorParticle size segregation is a common phenomenon in many particulate processes and has many undesirable effects. The size segregation which occurs on a belt conveyor causes a serious problem for on-line particle size measurement using image-based techniques. Whether particle size distributions mea...Particles; Size; Belt conveyors; Modelling1997
109 Miller, Jan D.Pilot-plant evaluation of a water insoluble hydroxamic acid collector for single stage flotation of Florida phosphate rockRecent laboratory results have demonstrated that selective flotation of phosphate rock can be achieved in a single stage with improved separation efficiency when compared to the standard double float process. The new reagent chemistry is based on the use of a water insoluble alcoholic solution of ...Phosphate rock; Flotation; Double float; Separation2006
110 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
111 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
112 Miller, Jan D.Quantitative in-situ analysis of collector adsorption reactions by FTIR internal reflection spectroscopyResearchers in flotation chemistry have long sought to describe collector adsorption phenomena in greater detail including kinetics, orientation and interactions between adsorbed species. Now a quantitative description can be made in-situ using FTIR internal reflection spectroscopy. Details of the a...Fourier transform infrared spectrometers1989
113 Miller, Jan D.Reaction kinetics of bismuth dissolution from lead cake by sulfuric acid leachingLead cake, a zinc smelter flue dust residue, consists primarily of lead sulfate. Characteristic properties of lead cake were determined in order to aid the understanding of reaction mechanisms involved in bismuth removal from lead cake by sulfuric acid digestion. Sp gr (specific gravity) measuremen...Lead cake; Smelter flue; Lead sulphate; Bismuth; Sulfuric acid1978
114 Miller, Jan D.Removal of dissolved contaminants from mine drainageEleven mill tailing samples from locations throughout the Rocky Mountain region were tested for their effectiveness in removal of dissolved contaminants from mine drainage . With the exception of the sample of the Blaine Mill tailing, the average capacity of the tailings tested was 9.8 mg of iron p...Mine drainage; Mill tailing; Adsorption; Precipitation; Rocky Mountain Region1972
115 Miller, Jan D.Removal of volatile organic compounds from contaminated water using air-sparged hydrocyclone stripping technologyThe air-sparged hydrocyclone (ASH) technology offers the unique opportunity to achieve efficient removal of volatile organic compounds (VOCs) from contaminated water at a high specific capacity, more than 100 times that of conventional air stripping technologies. VOC stripping is the first applicati...Air-sparged hydrocyclone; Air stripping; Contaminated water1997
116 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
117 Miller, Jan D.Role of the hydrocarbon chain in anionic flotation of calciteThe response of calcite to flotation with saturated fatty acids and alkyl sulfonates of various chain lengths is presented. The amount of collector required for flotation is shown to decrease systematically with increasing carbon content from 8 to 12-carbon atoms per molecule. This systematic flot...Hydrocarbon chain; Calcite; pH (Chemistry); Carbon1967
118 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
119 Miller, Jan D.Screening and classificationThe processing of minerals almost invariably involves the reduction in size of the minerals contained in an ore to effect liberation of disseminated values or, in other instances, to effect increased surface area. Separation of solids according to size usually is undertaken to promote maximum produc...Mesh; Mechanical; Separation1973
120 Miller, Jan D.Search for adsorbed gold cyanide on carbon surfacesThe mechanism of adsorption of gold from alkaline cyanide solutions by carbon has been the subject of much research over the past decade. In this paper, the nature of the gold cyanide adsorption phenomenon is investigated, particularly with respect to carbon substrates and associated surface adsorpt...Gold cyanide; spectrometers; X-ray photoelectron spectroscopy1991
121 Miller, Jan D.Selective flotation of fossil resin from Wasatch Plateau high-volatile bituminous coalCertain bituminous coals are known to contain appreciable quantities of natural fossil or subfossil resin. Such resinous coals are found in the western US, particularly the Wasatch Plateau coalfield of UT. Some of the seams in this field contain an average of 5% resin. This fossil resin has been r...Bituminous coal; Wasatch Plateau; Resin1989
122 Miller, Jan D.Selective flotation of iron oxideThe response of pure goethite and two natural iron ores to flotation with potassium octyl hydroxamate is presented. The ores contained 12.5% and 39.7% iron; concentrates containing 69.5% and 61.5% iron, respectively, were obtained with additions of 0.4 lb/ton hydroxamate.Goethite; Iron; Flotation; Iron Oxide1967
123 Miller, Jan D.Selectivity considerations in the amine extraction of gold from alkaline cyanide solutionsIt has been discovered that gold can be extracted from alkaline cyanide solution with primary, secondary, and tertiary amines by adding certain Lewis base modifiers, such as organic phosphorus oxides. Under these circumstances, gold can be extracted at about pH 10, commensurate with the pH of cyan...Gold; Amines; Alkaline cyanide; Extraction1984
124 Miller, Jan D.Selectivity considerations in the amine extraction of gold from alkaline cyanide solutionsIt has been discovered that gold can be extracted from alkaline cyanide solution with primary, secondary, and tertiary amines by adding certain Lewis base modifiers, such as organic phosphorus oxides. Under these circumstances, gold can be extracted at about pH 10, commensurate with the pH of cyani...Gold; Amines; Alkaline cyanide; Extraction1984
125 Miller, Jan D.Separation of bitumen from Utah tar sands by a hot water digestion-flotation techniqueTar sand deposits in the state of Utah contain more than 25 billion bbl of in-place bitumen. Although 30 times smaller than the well-known Athabasca tar sands, Utah tar sands do represent a significant domestic energy resource comparable to the national crude oil reserves (31.3 billion bbl). Based ...Tar sand; Utah; Bitumen; Hot water separation; Froth flotation1978
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