Blogs
Vibrating Screen
For efficient wet or dry screening—Hi-capacity, 2-bearing design. Flywheel weights counterbalance eccentric shaft giving a “true-circle” motion to screen. Spring suspensions carry the weight. Bearings support only weight of shaft. Screen is free to “float” and follow positive screening motion without power-consuming friction losses. Saves up to 50% HP over 4- bearing types. Sizes 1 x 2′ to 6′ x 14′,
Can I use Seawater in my Greenhouse
How do Seawater Greenhouses Work? A seawater greenhouse is a type of greenhouse technology that utilizes seawater to grow crops in arid or desert regions. It combines two main elements: the greenhouse structure and the seawater desalination process. Here’s how a seawater greenhouse typically works: 1. Greenhouse Structure: The greenhouse is designed to provide a controlled environment for plant growth.
What is the Role of Water in Lithium Mining
Balancing Resource Extraction and Water Sustainability Lithium, a key component in batteries that power electric vehicles and store renewable energy, has become increasingly vital in our pursuit of a sustainable future. As demand for lithium rises, so does the importance of understanding and addressing the environmental impact of its extraction. One critical aspect of lithium mining that warrants attention is
Direct Lithium Extraction (DLE)
Direct Lithium Extraction (DLE) is an innovative method of extracting lithium from brine or other lithium-rich sources without the need for traditional evaporation ponds. Unlike conventional lithium extraction processes, which rely on the natural evaporation of water to concentrate lithium, DLE techniques offer a more efficient and environmentally friendly approach. The traditional lithium extraction process involves pumping lithium-rich brine into
Soluble Metal Xanthates and their Effect on Differential Flotation
Table of ContentsSolubility of Metal Xanthates in Flotation ReagentsLead, Copper, Zinc, and IronGold and NickelEffect of Surface Oxidation on FloatabilityFlotation Control by Solubility of Metal XanthatesFlotation of PB-CU-FE-ZN OreResume:Resume:Resume:Flotation of CU-FE Ore:Resume:Resume:Climatic Conditions affect Flotation RateDetailed Study of Sudbury OreDescription of OrePreparation of Test SamplesFlotation MachineChemical AnalysisPreliminary Test WorkReagents UsedDescription of TestsCalculated Estimate Indicated by Test WorkResume of Results of
Outcrops
In the examination of an undeveloped prospect a decision must be arrived at from an inspection of the outcrops and the exposures in a few shallow pits. Prospects that are offered for sale rarely expose any important quantity of good ore, work having usually been stopped when the immediate exploration no longer yielded favorable results. It should be borne in
Diamond Drilling
Table of ContentsDiamond DrillsDiamondsUses of the Diamond DrillSupervisionPreparing a Prospect for Diamond DrillingControl of the Location of Drill HolesContracting the DrillingForm of ContractTesting Drill Holes for Vertical Angle and AzimuthWedging Drill Holes to keep them Nearly VerticalCementation of Drill HolesNew Standard Sizes of FittingsSludge CollectionCore and how to Handle itSampling and Classification of CoreCore Samples to be kept as RecordAnalysis
Geology
Table of ContentsGenesis of a Typical Porphyry DepositNew CorneliaChuquicamataBraden Frequently the careful engineer puts the word porphyry in quotation marks or precedes it with “so-called,” when he writes of the Porphyry Copper mines. This is done by way of serving notice that he is aware that the term is not a precise one, though no one who is informed on
Metallurgy Problems
Table of ContentsParting LimitsAging While reflecting on the subject of my present paper, I soon realized that it would be very difficult to say something really new about any special aspects of metallurgy. In consideration of the excellent scientific work that has been done in the United States in connection with almost all the fundamental questions that are of interest
Gold Alloy Melting and Casting
Table of ContentsMetals used in AlloyingGas and Electric MeltingDefects in IngotsSurface DefectsIngot ProportionsPorous IngotsDeoxidizersUse of Deoxidizers in Sterling SilverUse of Phosphorus in Gold AlloysCalcium Boride in Gold AlloysCasting TemperatureEffect of ImpuritiesSulfur in White Gold The problem of scrap is probably of greater importance in the production of gold, silver and other precious metal alloys than is the case for base
Method for Estimating the Efficiency of Pulverizers
Table of ContentsImpact Grindability TestGrindability Test in Analysis of Mill PerformanceGeneral Discussion Grinding costs are an important item in cement manufacture, and the cost of power is one of the large items in grinding costs. Even where power is of secondary importance, cost items dependent on mill capacity are influenced by the efficiency with which the mill uses power. Tube
Screw Crusher
The Freeport Sulphur Co. built a portable screw crusher in 1944 that solved a problem that none of the crusher manufacturing companies contacted were able to do. Two of these crushers have now been in service for 6 years, giving satisfactory service in handling a million tons per year, and having a capacity of over 2000 long tons per 8-hr
Largest Mines in the World
Here is my list of the Top 15 largest and biggest mines in the world: They are economically big and physically large, taking a lot of time and power to excavate using special mining equipment. But in their core, there’s what big mining companies are looking for: the precious ore. Join us as we explore the world of the
Hardness and Toughness of Rocks
Table of ContentsDiscussionWritten Discussion The speed of drilling rock has become an important factor in mining operations, while the placement of holes, kind, and quantity of explosive used are equally important. These are a function of the rock hardness and toughness. Both of these factors must be considered in compiling a table that will enable a mine operator or engineer
Why is cyanide heap leaching used to extract gold from some deposits
Cyanide is used in heap leaching to extract gold from some low-grade deposits because of its ultra-low-cost and high effectivity are leaching gold.
Concasseur
Table of ContentsConcasseurs PrimairesConcasseurs a MachoiresConcasseurs GiratoiresComparer Concasseurs PrimairesConcasseurs SecondairesConcasseurs a ConeTypes de Concasseurs de PierreCircuits de Concassage Le concassage constitue la premiere etape de la comminution. Son objectif n’est pas la liberation des mineraux, mais simplement la reduction de dimension afin de faciliter la manipulation ulterieure du minerai. II est normalement fait a sec en deux ou trois etapes.
Jaw Crusher Working Principle
Table of ContentsJaw Crusher TerminologyJAW CRUSHERSDouble-Toggle Jaw CrushersSingle-toggle Jaw CrushersSizing Jaw CrushersForced Feed Jaw CrushersBulldog Jaw CrusherTraylor Jaw CrusherJaw Crusher Foolproof A sectional view of the single-toggle type of jaw crusher is shown below. In one respect, the working principle and application of this machine are similar: the movable jaw has its maximum movement at the top of the crushing chamber, and minimum movement
Use of Bleaching Clays in Water Purification
Table of ContentsAdvantages of Bleaching ClayUse of Clay at AtlantaConclusionAcknowledgments Bleaching clays have been used extensively in the oil-refining industries for a number of years. Their use in water purification is relatively recent and less extensive. They are frequently classified as (1) those naturally active and (2) those active after artificial activation with acid. Fuller’s earths fall within the general
Wilfley Table
The Wilfley table is a truly remarkable gold concentrating table first built on a preliminary scale in May, 1895. The first full-sized table was built by Mr. A. R. Wilfley, and was used in his own mill in Kokomo Colo., in May, 1896. The first table sold for installation was placed in the Puzzle mill, Breckenridge, Summit county, Colo., in August,
Ball Mill Grinding
Table of ContentsBall Rod and Pebble MillsBall LoadsScreens and FlakinessUnits of SurfaceBatch and Continuous Grinding ComparedBatch Ball Milling at Various Speeds and Ore ChargesBest Wet and Dry Batch Ball MillingSelection of Volume of Ball Loads in Continuous Dry Open Circuit GrindingNonferrous Media and Steel Balls ComparedSillimanite BallsTetrahedrons and Spherical Balls ComparedBattered Reject Balls and New Spherical Balls ComparedMills of Different
How to Remove Quartz & Impurities from Refractory Clays
Table of ContentsPhysical and Chemical CharacterBeneficiationDetermination of Firing PropertiesLaboratory InvestigationsSandy Flint Clay A. P. G. 1Physical and Chemical CharacterBeneficiationWet-Table and Wet-Cyclone ConcentrationDetermination of Firing PropertiesSandy Flint Clay H.-W. 2Physical and Chemical CharacterBeneficiationWet-Table and Wet-Cyclone ConcentrationDetermination of Firing PropertiesSandy Plastic Clay A, P. G. 3Physical and Chemical CharacterBeneficiationWet-Table and Wet-Cyclone ConcentrationDetermination of Firing PropertiesPyritic Plastic Clay A. P. G. 10Physical and
Fine Grain Lead Zinc Sulfides Flotation
Table of ContentsThe OresPhysical CharacterChemical DescriptionLaboratory StudiesNabob OreHighland Surprise OrePend Oreille OreLiberal King OreSidney OreDouglas Ore This investigation has shown that lead and zinc sulfide minerals, in pulps containing particles all less than 9 microns in size, may be selectively recovered by froth flotation. All but one of the samples yielded lead concentrates-containing at least 57 percent Pb. Selective recovery
Explosives Explosions and Flames
Table of ContentsResearch and Technologic ActivitiesExplosion, Flame, and. Combustion ResearchCombustion StudiesIgnition StudiesResearch on Explosion Hazards in Operations Involving Flammable Gases and LiquidsDetermination of Flammability Characteristics of Individual CompoundsExplosives Research and TestingApplied ResearchFundamental Explosives ResearchEvaluation of Explosives and Blasting DevicesExperimental Coal Mine and Dust Explosions ResearchExperimental Coal MineDust Explosion Galleries and ChambersDust Explosion LaboratoriesMeetings and ConferencesExplosion, Flame and Combustion ResearchExplosives Research
Spectrograph Analysis of Tungsten
Table of ContentsScope and Outline of MethodEquipmentExperimentalEffect of Germanium Added to TungstenVolatilization StudiesX-Ray Analyses of ChargesDetails of the MethodPreparation of Standards and SamplesProcedureOperating ConditionsResults of Analyses One of the main advantages of this method for estimating impurities in tungsten is that the analysis is performed on the metal. Ideally, samples and standards should be of the same particle size, between