Soils used to construct compacted permeability barriers such as liners for solid and liquid waste landfills and lagoons must be carefully evaluated and designed to
Table of ContentsTheoryCritical Surface TensionSurfactant AdsorptionIon ExchangeClose-Packing EffectsHemimicelle FormationMaterialsCoalsWetting Solution ReagentsExperimental ProcedureExperimental ResultsPure WaterSD2ES Surfactant on Hard-to-Wet CoalSD2ES Surfactant on Easy-To-Wet CoalSurface Tension of SD2ES
The maximum settlement (S) of the soil subbase occurs at the center of the wetted soil column. There would be little to no settlement along
Hydrometallurgical Removal of Fluorine from Copper Concentrates: CVRD Technology Center (SUTEC) has developed and patented an hydrometallurgical process route to remove fluorine from copper concentrates, as
Table of ContentsPressure LeachingPurification of LeachatesLead ElectrowinningPressure LeachingOxygen PressureTemperatureCatalystsTimeFree H2SiF6Purification of Leachates and ElectrowinningLeach Residues As part of the U.S. Bureau of Mines program to
Table of ContentsMagnetohydrodynamicsEquation of ContinuityNavier-Stokes EquationEnergy EquationMaxwell’s EquationsEquations of StateBoundary ConditionsSteelmaking The U.S. Bureau of Mines is conducting an ongoing research project to better understand
Table of ContentsPhysical ProblemSystem ModelParticle SizeTwo Limiting CasesFactors Affecting Collision EfficiencyAssumptionsMathematical ProblemEquations of MotionNondimensional EquationsBasic ParametersViscous Flow SolutionPotential Flow SolutionInitial ConditionsNumerical SolutionNumerical MethodEquations of Motion
Table of ContentsEquipment and MaterialsExperimental Procedure and ResultsElectrowinningElectrorefiningProposed Electrorefining Cell The U.S. Bureau of Mines developed an alternative electrochemical process for the production of calcium
Table of ContentsFluorsparPotential ByproductsBerylMicaSilica SandFlotationExperimental Materials and EquipmentFlotation ColumnsBubble GeneratorProcedureCrushing and GrindingFluorite Flotation CircuitMica Flotation CircuitSilicate (Beryl) Flotation CircuitZeta Potential Studies ProceduresDiscussion of ResultsFluorite FlotationProcess