Blogs
Basic Gold Prospecting & Exploration Methods
Table of ContentsPhotogeologySeismic MethodSample ExtractionSample HandlingAssaysProspectingWhere to look for gold ores Prospecting and exploration that is a search for precious metals deposits is not a simple process because big deposits were discovered a long time ago. There are several places with important content of precious metals waiting for skill prospectors. The large mining companies of the world are focused in
Single VS Multi-Stage Crushing
Table of ContentsSize of FeedProduct SizeStage-Crushing VS Closed-Circuit Crushing There are no set rules for determining whether the secondary stage should consist of one single crusher, or of two or more machines operating in parallel. The decision must be made upon the merits of each problem. If the required receiving opening necessitates the selection of a crusher whose capacity equals or exceeds
Secondary Crushing Equipment
Table of ContentsSecondary Crushing StageCapacity of Secondary Stage The term “secondary crushing” has become well established and familiar through long usage; it applies to the crushing stage, either single or multiple, which follows immediately after the primary crusher, taking all or a portion of the product of the primary crushing stage as its feed. The term should not be used,
Column Flotation Cells
Table of ContentsAdvances in Column FlotationGold Flotation & ColumnsEffect of Aeration RateEffect of Pulp Bubble SizeEffect of Column HeightEffect of Feed Solids ContentEffect of Froth Bubble Diameter Column flotation cells, like mechanical cells, are used to perform mineral separations. Column cells do not use mechanical agitation (impellers). Instead, mixing is achieved by the turbulence provided by the rising bubbles. Columns
Column Cells
Flotation cells can be divided in two groups: mechanical and pneumatic machines. The first group comprises the traditional cells which employ a mechanical agitation, and the second group is related to pneumatic cells which do not have mechanical devices for maintaining the slurry under agitation. Columns offer the advantages of counter current contact between slurry and air, no requirement for
Gold Smelting & Refining Process
Table of ContentsGold AlloysGold Melting PointsRetortingGold SmeltingGold Refinery SlagRefining GoldGold AssayFluxMelting GoldCupellationGold-Silver SeparationGold Refining Book Gold can be concentrated and recovered by applying different gold refining process methods and the final product has variable quality. In this way, it is necessary to have a better marketable product so that the incomes can be improved. Then, we have two smelt and cast
Crusher Surge Pocket AKA “Rock Box”
Table of ContentsPocket LevelSafety A crusher’ surge pocket, sometimes called a “rock box“, is found directly below the primary gyratory crusher. It provides limited storage, normally about two truckloads, to enable smooth feeding of crushed product from the bottom of the crusher onto an apron feeder and takeaway belt conveyor. Pocket Level Level instruments measure “high-high”, “high”, and “low” levels
DR-300 Flotation Agitator Mechanism Drawings
DR-300 Diffuser Assembly and DR300 FLOTATION AGITATOR DRAWINGS and DR-300 WEAR RING FINISHED DR-300 9 VAIN IMP FIN and DR-300 12 VAIN IMP FIN and DR-300 Air Bell NO METAL INSERT M-0046 DR-300 Flotation cell cross section profile Drawings and DR Flotation Cells-Machines brochure and DR 300 500 1500 Flotation Cell Drawings
Gyratory VS Jaw Crushers: Advantages & Disadvantages
Table of ContentsFeatures of the Gyratory CrusherFeatures of the Jaw CrusherAdvantages and DisadvantagesHandling and Crushing Slabby Material No discussion of primary crusher selection would be complete without a comparison of the two leading types: the standard gyratory crusher and the Blake jaw crusher. Although their fields of application overlap to a considerable degree (at least in the realm of primary crushing) there
Crushing Equipment Selection
Table of ContentsShovel and Crusher SizesOre Transportation and Crusher FeedingFeeders for CrushersRock Drilling and Blasting In open pit quarry operations the loading of the blasted rock for transportation to the primary crusher house involves either power-shovels. Any size of primary crusher may be used for hand-loaded rock; it all depends upon how much secondary shooting, and hand sledging, the operator feels
Lead-Bismuth Flotation
Often we hear that copper concentrates have contaminants which affect the incomes to be obtained by commercialization. Well, one of the worst contaminant is bismuth because is difficult to remove during smelting process and the metallic copper to be obtained at the end of the process will be brittle and consequently its mechanical properties will be very bad. Ergo, the objective
Crushing Plant Capacity
The suggested reserve capacity for quarry operations applies as well to open-pit mining operations employing power shovels for loading the ore. Usually the original crusher is expected to produce the required daily tonnage in such plants in one or two shifts, so a time-reserve does exist which can be utilized to make up for delays. But this can only be accomplished
Primary Crushing
Table of ContentsCharacteristics of Rocks to CrushCrusher Capacity FactorWhich Crusher is the Best Primary Rock Breaker The term “primary crusher,” by definition, might embrace any type and size of crushing machine. The term implies that at least two stages of crushing are involved, but in many cases the machine which performs the function of initial crusher is the only crusher
Crushing Products Size and Shape -What to Expect
Table of ContentsCrusher-Setting, Product-SizePrimary Crusher ProductCurves for Screened FeedClosed-Circuit Product AnalysisSquare Openings VS Round I have made a number of general remarks regarding the character of product delivered by crushers of various types, and under different conditions of operation. Generalities are of value only if we have some standard to which comparisons may be referred; therefore, we should like to present more
Hammer Mill Operating Principle
Table of ContentsHammer Mill Reduction RatioHammer Mill ApplicationsHammer Mill Operating PrincipleHammer Mill CrusherHammer Mill Capacity TableHammer CrusherHammer Mill Crusher Capacity Table Operational Characteristics: The method of operation has a considerable effect upon the nature of the product. When minimum fines are a requirement, the hammer mill should always he operated in closed circuit with a screen, or screens; the circulating load should be fairly high; speed
Rotary Drilling & Core Sampling
Table of ContentsUSE OF BASKET-TYPE BARRELADVANTAGES AND DISADVANTAGESAUGER-TYPE CORE BARRELADVANTAGES OF REED AND HEPLER CORING TOOLOILFIELDS-HOLLAND CORE BITKNAPP CORE BARRELFUTURE OF REAMING-TYPE CORING TOOLSDiscovery of Palladium During the past few years the taking of cores in drilling with rotary equipment has been perfected to a remarkable degree in the Gulf Coast fields of Texas and Louisiana. Taking of cores is
Hammer Mill Crusher & Grinder
Table of ContentsHammer Mill Working PrincipleCapacity of Hammer Mill CrushersHammermill Grinder discharge product size distributionBasic Hammer Mill Operational ConceptsJeffrey Swing Hammermill PulverizerHammer Mill Capacity The hammer mill is the best known and by far the most widely used crushing device employing the impact principle of breaking and grinding stone. Thus far we have described machines which do a portion of