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CreatorTitleDescriptionSubjectDate
26 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
27 Brown, Francis HaroldPleistocene rhyolite of the mineral mountains, Utah geothermal and archeological significance1978
28 Miller, Jan D.Effect of feed source in the hot water processing of Utah tar sandThe 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 flotation1980
29 Miller, Jan D.Bench scale flotation of alunite ore with oleic acidAlunite [KA13(SO4)2(OH)6] is a promising non-bauxitic aluminum resource, the domestic reserves of which are estimated to be 800 x 106 tons at 35 percent alunite. The major gangue mineral associated with alunite is quartz. The thermochemical process that has been developed for treatment of this ore...Mesh; Separation; Liberation1980
30 Miller, Jan D.Flotation behavior of digested Asphalt Ridge tar sandThe hot water process for Utah tar sands differs significantly from that used for Canadian tar sands due to inherent differences in respective bitumen viscosities and the nature of bitumen-sand association. These differences have led to the identification of certain design criteria necessary to ac...Tar sand; Utah; Bitumen; Hot water separation; Froth flotation1981
31 Miller, Jan D.Electrochemistry in silver catalysed ferric sulfate leaching of chalcopyritePrevious 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; Elemental1981
32 Miller, Jan D.; Herbst, John A.Factors affecting droplet size distributions produced in dispersed phase mixersDroplet 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; Agitating1981
33 Miller, Jan D.Equilibrium and kinetics of copper extraction from ammoniacal solutions by hydroxoximes with particular emphasis on transport phenomenaThe chemistry of copper extraction from ammoniacal solutions by hydroxyoxime extractants was studied. Equilibrium measurements were made by shakeout experiments with subsequent analyasis of the aqueous and/or organic phases. The kinetic experiments were carried out in a single drop reaction cell in ...Reactant; Concentration; Dispersed1981
34 Miller, Jan D.Fine coal flotation in a centrifugal field with an air sparged hydrocyclonePreliminary results are reported regarding the design and development of a pilot scale air sparged hydrocyclone for cleaning fine coal 590 \xm ("28 mesh) containing 24% ash and 1.6% sulfur. The principle of separation is the flotation of hydrophobic coal particles in the centrifugal field generated...rocyclones; Coal; Separation technology1982
35 Jewell, PaulThe geology and geothermal setting of the Magic Reservoir Area, Blaine and Camas Counties, IdahoThe Magic Reservoir area straddles the Blaine- Camas county line in south-central Idaho, along the northern boundary of the central Snake River Plain. The rocks exposed at Magic Reservoir include a 5.8- million-year-old rhyolite flow, the Pliocene Square Mountain Basalt, multiple cooling units ...1982
36 Jewell, PaulGeology and geothermal potential North of Wells, NevadaThis report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, ...Tertiary sediments; Siltstones; Conglomerates; Lithologies; Well logs; Aquifers; Step faults1982-01-01
37 Brown, Francis HaroldThe lower Omo basinThe boundaries of the Lower Omo Basin have been mapped by Fuchs (1939) and by Butzer (1970, 1971) in a general way. The structural features and physiography of the eastern and central part of the Lower Omo Basin are best expressed on the maps of Davidson et al. (1973). Walsh and Dodson (1969) have m...1983
38 Brown, Francis HaroldChronologyThe boundaries of the Lower Omo Basin have been mapped by Fuchs (1939) and by Butzer (1970, 1971) in a general way. The structural features and physiography of the eastern and central part of the Lower Omo Basin are best expressed on the maps of Davidson et al. (1973). Walsh and Dodson (1969) have m...1983
39 Miller, Jan D.Importance of bitumen viscosity in the hot-water processing of domestic tar sandsThe 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 processing1983
40 Miller, Jan D.Fast flotation with an air-sparged hydrocycloneThe status of the research programme on air-sparged hydrocyclones at the University of Utah is presented. Fast flotation of coal, oil shale, and copper porphyry ore has been demonstrated with capacities far exceeding those of conventional flotation cells. In addition to the performance characteris...Cells; Capacity; Froth1984
41 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
42 Miller, Jan D.Hydrophobic character of semisoluble salt minerals with oleate as collectorThe effects of temperature, oxygen partial pressure, and solution chemistry can have a significant effect on the hydrophobic character of semisoluble salt minerals with adsorbed oleate. Measurements of bubble-attachment time and contact angle reveal the sensitivity of these hydrophobic surfaces to c...Flotation; Solution; Oleate1984
43 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
44 Miller, Jan D.; Wan, Rong YuSignificance of carbon properties in the enhanced ferric sulfate leaching of CuFeS2/C aggregatesAcid ferric sulfate solution has been used for heap and dump leaching of low-grade chalcopyrite ores and is being considered as a possible lixiviant for the hydrometallurgical processing of copper sulfide concentrates. For many years, researchers have attempted to explain the leaching behavior of ch...Ferric sulfate; CuFeS2; Particulate carbon1984
45 Brown, Francis HaroldDatingThere are basically three lines of investigation that are involved in geochronology ? the dating of rocks and other earth materials. First, there are the physical and chemical dating methods which give us numerical estimates of age. Second, there is the reconstruction of the order of events in sec...1984
46 Miller, Jan D.; Wan, Rong YuEnhanced ferric sulphate leaching of copper from CuFeS2 and C particulate aggregatesSignificantly 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; Electrochemical1984
47 Miller, Jan D.Comparison of process alternatives for gold recovery from cyanide leach solutionsBoth conventional and nonconventional process alternatives for gold recovery from cyanide heap leach solutions are discussed in terms of possible flowsheets. Conventional process alternatives include carbon adsorption and zinc dust precipitation, while nonconventional process alternatives include re...Conventional; Exchange; Flowsheet1984
48 Chapman, David S.; Picard, M. DaneHeat flow in the Uinta Basin determined from bottom hole temperature (BHT) dataThe thermal resistance (or Bullard) method is used to judge the utility of petroleum well bottom-hole temperature data in determining surface heat flow and subsurface temperature patterns in a sedimentary basin. Thermal resistance, defined as the quotient of a depth parameter AZ and thermal con...Thermal analysis; Bottom hole temperature1984-04
49 Miller, Jan D.; Herbst, John A.; Lin, Chen-LuhDevelopment of a multicomponent-multisize liberation modelThis 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 model1985
50 Miller, Jan D.Flotation behavior of chromium and manganese mineralsFlotation behavior of chromite and manganese-bearing minerals has been reviewed. Flotation of these minerals and ores with fatty acids, amines, sulfates, sulfonates and hydroxamates has been presented and is discussed in terms of surface charge and chemical interaction between the mineral surface ...Concentration; Chromite; Deposits1986
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