Determination of Lithium In Lithium Minerals

Determination of Lithium In Lithium Minerals

Table of ContentsApparatusPreparation of 2 M Citrate Buffer Stock SolutionStandardizationPhotometric Analytical ProcedureInterferencesAccuracy and Precision A simplified, routine method for determining lithium in lithium-bearing rock is presented. The sample is decomposed by repeated treatments with nitric, hydrofluoric, and perchloric acids. Since this procedure does not appreciably dissolve beryl, interference by beryllium (the principal interfering cation) is … Read more

Asbestos Mining Methods and Costs

Table of ContentsMethods of Prospecting and ExplorationMethod of Estimation of Tonnage ValueDevelopment And Mining (General)Old Regal WorkingsNew Regal WorkingsNavajo WorkingsDevelopment DetailsStope MiningUnderground TransportationAuxiliary OperationsPercent Extraction and Production RatesVentilationMine DrainageSupervision and Labor DistributionWage Contract RatesSafety PracticesThe Chrysotile MinesHistorical Data on Methods and CostsMilling and GradingCost for Year of 1957 This is one of a series of … Read more

Spectrochemical Analysis of Tungsten

Table of ContentsPreparation of StandardsPreparation of SamplesExcitation and Exposure ConditionsExperimental ResultsDiscussion The methods developed are satisfactory within the ranges reported. These ranges are adequate for the tungsten metal presently available for 19 of the 20 elements investigated. The accuracy and reproducibility of the methods are acceptable, but improvement in this field is desirable. The concentration … Read more

How to Make Boron by Electrolysis

Table of ContentsTheoretical ConsiderationsExperimental Procedures and ResultsCell DesignAnode MaterialsCathode MaterialsOperation of the Electrolytic CellTemperatureCathode Surface and Length of ElectrolysisComposition of Fused-Salt BathsElectrolyte AlkalinityInert-Atmosphere CellAnalytical ResultsConclusions Because an economic method for preparing pure boron has not been developed, a program was started by the Bureau of Mines to evaluate existing techniques or to develop new methods … Read more

Smelting Taconite in Blast Furnace

Table of ContentsRaw Materials UsedBlowing-in FurnaceSmelting Operation Using Plus 10-Mesh OreSmelting Operations Using Plus 4-Mesh OreDiscussion of ResultsSmelting with Basic SlagHeat Balance for Taconite Ore SmeltingProduction Costs Crude Minnesota taconite was charged in the Bureau of Mines experimental blast furnace so that smelting characteristics of such highly siliceous raw materials could be studied and smelting … Read more

How Susceptible are Organic Compounds to Tritium Exchange Labeling

Table of ContentsMechanism of Tritium ExchangeApparatus and ReagentsProcedureLabeling Organic Samples with TritiumPurification and TrappingDecontamination of EquipmentRadioassay of SamplesResults This report describes the preparation of tritium-labeled organic compounds to be used by the Federal Bureau of Mines in studying the role of certain gasoline constituents in gum-forming mechanisms. The gasoline constituents that have been investigated boil … Read more

Spectrophotometry Determination of Copper in Tungsten Metal Powder

A spectrophotometry method for the determination of small amounts of copper in tungsten metal powder using the principle of solvent extraction has been developed. The metallic sample is dissolved in hydrogen peroxide, tartaric acid added, the pH adjusted, and the excess peroxide destroyed by boiling. Copper is reduced to the cuprous state, and the reagent … Read more

Zirconium Stress & Corrosion Cracking

Table of ContentsApparatus for TestingMaterialTensile PropertiesSurface Preparation of SpecimensTest SolutionsResistance MeasurementsResults of Survey Testing Hot-Rolled SheetHot-Rolled Sheet With Variation of Applied StressHot-Rolled Sheet with Variation of Applied Stress in Air-Aerated SolutionsCold-Rolled Annealed Sheet with Variation of Applied Stress and Air-Aerated SolutionsCold-Rolled Annealed Sheet with Variation in Solution Concentration and Air-Aerated SolutionsElectrical Resistance Measurements The results … Read more

Variables Affecting the Probability of Ignition by Explosives

Table of ContentsThe DataExperimental Procedure of Individual ShotsStatistical Designs as Part of the ProcedureThe Up-and-Down TechniqueRandomizationInterpretations of the AnalysisFirst Analysis Leading to Tentative ConclusionsSecond Analysis Leading to Final Conclusions The principal official test performed by the Bureau of Mines to determine the permissibility of coal-mine explosives, commonly referred to as the gallery test, has been … Read more

How to Recover Thermal Energy from Molten Salts

Table of ContentsSpecific Experimental ObjectivesExperimental EquipmentExperimental ProcedureExperimental Results and DiscussionHeat TransferSteam Turbine OperationChemical Reactions and Chemical Composition of Effluent GasesCorrosion Rates of Materials of ConstructionSalt EntrainmentPipe Plugging One objective of Project Gnome is to study the feasibility of a phase of the Plowshare program recovering thermal energy from an underground nuclear explosion. The test will … Read more