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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
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Miller, Jan D. | Comparison of process alternatives for gold recovery from cyanide leach solutions | Both 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; Flowsheet | 1984 |
| 2 |
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Brown, Francis Harold | Dating | There 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 | |
| 3 |
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Miller, Jan D.; Wan, Rong Yu | Enhanced ferric sulphate leaching of copper from CuFeS2 and C particulate aggregates | Significantly 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; Electrochemical | 1984 |
| 4 |
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Miller, Jan D. | Fast flotation with an air-sparged hydrocyclone | The 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; Froth | 1984 |
| 5 |
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Miller, Jan D. | Hydrophobic character of semisoluble salt minerals with oleate as collector | The 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; Oleate | 1984 |
| 6 |
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Miller, Jan D. | Selectivity considerations in the amine extraction of gold from alkaline cyanide solutions | It 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; Extraction | 1984 |
| 7 |
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Miller, Jan D. | Selectivity considerations in the amine extraction of gold from alkaline cyanide solutions | It 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; Extraction | 1984 |
| 8 |
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Miller, Jan D.; Wan, Rong Yu | Significance of carbon properties in the enhanced ferric sulfate leaching of CuFeS2/C aggregates | Acid 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 carbon | 1984 |
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