Filters: School Or College: "College of Mines & Earth Sciences" Collection: "ir_uspace" Format: "application/pdf"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 151 |
 |
Miller, Jan D. | Mercury control in the cyanidation of gold ores | The 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 cementation | 1996 |
| 152 |
 |
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 |
| 153 |
 |
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 |
| 154 |
 |
Brown, Francis Harold | Methods of dating | The fossil record of primates begins in the latest Cretaceous period, so primate palaeontologists are interested in techniques of dating applicable over the past 70 million years. Fossil bones themselves are rarely datable with any precision, and these are mainly of late Pleistocene or Holocene age.... | 1992 | |
| 155 |
 |
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 |
| 156 |
 |
Chandran, Ravi | Microstructure and thermal conductivity of thermal barrier coatings processed by plasma spray and physical vapor deposition techniques | The temperature dependence of the thermal conductivity of multilayer coatings made by a plasma spray technique as well as some coatings made by physical vapor deposition (PVD) was investigated. The multilayer coatings consisted of a varying number of layers of AI2O3 and Zr02 stabilized by 8%Y203. Pl... | Thermal barrier coatings; Multilayer coatings; Plasma spray technique | 1996 |
| 157 |
 |
Chapman, David S.; Harris, Robert N. | Mid-Latitude (30°-60° N) climatic warming inferred by combining borehole temperatures with surface air temperatures | We construct a mid-latitude (30°-60° N) reduced temperature-depth profile from a global borehole temperature database compiled for climate reconstruction. This reduced temperature profile is interpreted in terms of past surface ground temperature change and indicates warming on the order of 1°C... | Surface air temperature; Surface ground temperature; Borehole temperatures; Geothermal observations | 2001 |
| 158 |
 |
Jarrard, Richard D. | Milankovitch paleoceanographic cycles in geophysical logs from ODP Leg 105, Labrador Sea and Baffin Bay | Ocean Drilling Program (ODP) Sites 645 and 646, in Baffin Bay and the Labrador Sea, respectively, were logged following drilling during Leg 105. Geophysical logs in ODP drill sites yield long, continuous records of sedimentary sequences and thus provide the opportunity for examining evidence of peri... | 1990 | |
| 159 |
 |
Miller, Jan D. | Mineral processing fundamentals | The reported claims in several Russian articles that magnetic fields change the viscosity and other basic properties of water and as a result produce beneficial effects such as increased flotation rate, improved grades and recovery, and increased settling rates appear to be unfounded. This conclusi... | Minerals; Processing; Magnetic fields; Metallurgy; Water | 1971 |
| 160 |
 |
Miller, Jan D. | Minerals beneficiation in '69 steps up tonnage, engineering, environmental control and automation: size analysis and flotation chemistry highlighted by basic science researchers | The application of computers to the control and study of mineral processing operations such as grinding, classification and notation has created an interest in simulation studies of these operations with mathematical models. Evidence of this interest is confirmed by papers presented at the 1969 Int... | Mineral processing; Computer simulations; Mathematical models | 1970 |
| 161 |
 |
Garrett, Timothy J. | Modes of growth in dynamic systems | Regardless of a system's complexity or scale, its growth can be considered to be a spontaneous thermodynamic response to a local convergence of down-gradient material flows. Here it is shown how system growth can be constrained to a few distinct modes that depend on the time integral of past flows a... | 2012-01-01 | |
| 162 |
 |
Miller, Jan D. | Modulated Cr(III) oxidation in KOH solutions at a gold electrode: competition between disproportionation and stepwise electron transfer | The electrochemical oxidation of aqueous Cr(III) was examined using cyclic voltammetry with a polycrystalline Au electrode in KOH solutions of varying pH and Cr(III) concentration. The mechanism and kinetics for the oxidation of Cr(III) is a quasi-reversible diffusion-controlled reaction and is larg... | 2011-01-01 | |
| 163 |
 |
Miller, Jan D. | Molecular dynamics simulations of metal-cyanide complexes: fundamental considerations in gold hydrometallurgy | This study utilizes molecular dynamics simulations (MDS) in order to evaluate the hydration state and the characteristics of metal-cyanide anions in aqueous solutions. Cyanide complexes of gold, silver, zinc, mercury, and copper were examined. Tetracyano anions of zinc and mercury showed the highest... | 2011-01-01 | |
| 164 |
 |
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 |
| 165 |
 |
Chapman, David S. | Monitoring aquifer recharge using repeated high-precision gravity measurements: a pilot study in South Weber, Utah | Repeated high-precision gravity surveys were conducted over two infiltration cycles on an alluvial-fan aquifer system at the mouth of Weber Canyon in northern Utah as part of the Weber River Basin Aquifer Storage and Recovery Pilot Project (WRBASR). Gravity measurements collected before, during, an... | Aquifer recharge; Gravity measurements; Infiltration ponds; Weber River Basin Aquifer Storage and Recovery Pilot Project | 2008 |
| 166 |
 |
Reichler, Thomas J. | Multidecadal drought cycles in the Great Basin recorded by the Great Salt Lake: modulation from a transition-phase teleconnection | This study investigates the meteorological conditions associated with multidecadal drought cycles as revealed by lake level fluctuation of the Great Salt Lake (GSL). The analysis combined instrumental, proxy, and simulation datasets, including the Twentieth Century Reanalysis version 2, the North Am... | 2012-01-01 | |
| 167 |
 |
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 |
| 168 |
 |
Chandran, Ravi | Near threshold fatigue crack growth behaviour of a high strength steel: the effect of prior austenitic grain size | Near threshold fatigue crack propagation behaviour of a high strength steel under different prior austenitic grain sizes with constant tensile properties was investigated. Attention has been paid to the observation of facture modes at thresh-; old in different grain sizes. The observations indicate ... | High strength steel; Crack growth; Austenitic grain size | 1987 |
| 169 |
 |
Fernandez, Diego P. | Near-criticality in dilute binary mixtures: distribution of azulene between coexisting liquid and vapor carbon dioxide | The equilibrium distribution of dilute solutes between vapor and liquid coexisting phases of near-critical solvents exhibits a simple dependence on the solvent's liquid density which extends over a wide temperature range; however, theory predicts this dependence only as an asymptotic limit. In order... | Near-critical solvents; Azulene; Binary mixtures; Dilute solutions | 2002 |
| 170 |
 |
Zhdanov, Michael S. | New approach to interpretation of airborne magnetic and electromagnetic data | We present a new technique for underground imaging based on the idea of space-frequency filtering and downward continuation of the observed airborne magnetic and electromagnetic data. The technique includes two major methods. The first method is related to the downward analytical continuation and ... | 1996-01-01 | |
| 171 |
 |
Miller, Jan D. | New developments in mixing, flocculation and flotation for industrial wastewater pretreatment and municipal wastewater treatment | Solid/liquid separations are commonly the first step in any wastewater treatment. Such technologies are mature and new developments are rare. However, in the last decade some significant improvements in separation techniques for industrial waste water pretreatment have been implemented. Advances in ... | Wastewater treatment; Flocculation; Flotation; Industrial wastewater pretreatment; Sludge thickening; Mixing | 2005 |
| 172 |
 |
Garrett, Timothy J. | No way out? the double-bind in seeking global prosperity alongside mitigated climate change | In a prior study (Garrett, 2011), I introduced a simple economic growth model designed to be consistent with general thermodynamic laws. Unlike traditional economic models, civilization is viewed only as a well-mixed global whole with no distinction made between individual nations, economic sectors,... | 2012-01-01 | |
| 173 |
 |
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 |
| 174 |
 |
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 |
| 175 |
 |
Zhdanov, Michael S. | Novel approach to the model appraisal and resolution analysis of regularized geophysical inversion | The existing techniques for appraisal of geophysical inverse images are based on calculating the model resolution and the model covariance matrices. In some applications, however, it becomes desirable to evaluate the upper bounds of the variations in the solution of the inverse problem. It is possib... | Geophysical inversion; Electromagnetic modeling; Cauchy inequality; Resolution analysis; Lanczos decomposition method; SLDM; Voisey's Bay; 3-D modeling | 2006 |