Blogs
Flotation Machine
Table of Contents“Sub-A” in Corrosive CircuitsPrinciples of Operation of the “Sub-A”Pulp Flow and CirculationAeration and MixingSeparationConcentrationCoarse Material HandledNo Choke Ups or Lost TimeMiddling Returns Without PumpsPositive Cell ControlMetallurgical Advantages of a “Sub-A” Flotation CellSelectivityRecovery:Balanced Products AnalysisCapacitiesCapacity:Volume:Results:Construction of “Sub-A” Flotation CellsAll Steel ConstructionBearings and HousingStationary HoodLong Life Wearing PartsCircuit Flowsheet Flexibility The flotation process is widely used for treating metallic and non-metallic
Silver Lead Zinc Ore Processing Method using Flotation
Table of ContentsA Pb-Ag-Zn Separation Circuit Flowsheet #1Crushing SectionGrinding SectionSelective Flotation SectionPb and Zn Flotation ReagentsVisual SamplingPb and Zn Concentrate FiltrationSUMMARY of How to Separate Pb, Silver and Zinc Sulphides #1Silver, Lead & Zinc Flotation Circuit #2CRUSHING SECTIONGRINDING CIRCUITSELECTIVE FLOTATION of Silver Lead Zinc SulfidesTHICKENING AND FILTERINGSAMPLINGSUMMARYTypical Metallurgical Results Sulphide ore of lead and zinc containing considerable silver was submitted for
Lead Barite Fluorspar Separation Method
Table of ContentsProcess Flowsheet and TreatmentCRUSHINGGrindingFlotation of LeadFlotation of BariteFlotation of FluorsparThickening and FilteringConcentrate HandlingMetallurgical ResultsLarge Tonnage Mills The concentration of fluorspar ores by flotation is well established but the treatment of lead-barite-fluorspar ores has long been recognized as a difficult process generally resulting in unacceptable concentrates with relatively poor recoveries. Intensive research on this problem is continually being conducted
Lead Carbonate (Cerussite) Beneficiation by Gravity & Flotation
Table of ContentsTHE Cerussite Flotation Process FLOWSHEETCerussite Crushing PlantLead Carbonate (Cerussite) Gravity and Flotation CircuitReagents for Lead Carbonate (Cerussite) FlotationTailing SectionLead Carbonate (Cerussite) Thickening and FiltrationSUMMARY Treatment of oxidized lead ores (Cerussite) has long been recognized as a difficult process often resulting in low grade concentrates and low recoveries. Surface oxidation on galena ores has resulted in high tailings losses. The difficulty in
Hematite Processing by Flotation
Table of ContentsThe Flowsheet for Hematite Benefication Process by Flotation Crushing Hematite RockGrinding Hematite OreDesliming and Conditioning of HematiteReagents for Hematite FlotationHematite Flotation CircuitThickening and Filtering Hematite ConcentrateSampling Direct shipping of high grade iron ore, because of depletion or partial depletion of reserves, or high costs of operation has forced operators to use some means of beneficiation to produce an acceptable product with the lower grade iron ore reserves.
Single & Double Stage Grinding Circuits
The comparison between single stage and double stage grinding has received much attention in the past few years. In order to submit information for use of mill operators, we have prepared comparative flowsheets for 50 Ton, 100 Ton, 200 Ton, 350 Ton and 550 Ton/24 hour plants, showing both single and two-stage grinding in typical mill flowsheets. These flowsheet comparisons
Graphite Beneficiation Process
Table of ContentsSolution to the Graphite Or ProblemA graphite froth flotation FlowsheetCRUSHING AND STORAGE OF GRAPHITEGRINDING GRAPHITE OREGRAPHITE CONDITIONINGGRAPHITE FLOTATION SECTIONGRAPHITE FLAKE TABLINGGraphite Beneficiation ProcessMarket SpecificationsProduction ProblemsReagent Combinations Graphite is an important industrial mineral. Two types occur in nature, crystalline and amorphus. Crystalline graphite is used principally for crucibles and shaped structures. Amorphus graphite is used extensively in the steel and lubrication industries. In many deposits
Gold Washing and Gravity Circuit for Processing Placer Gold
Table of ContentsThe Placer Deposit Gold Recovery Process FlowsheetFEEDING THE GOLD OREGOLD WASHING AND CONCENTRATING PLANT The handling of large quantities of gold-bearing gravels is of utmost importance for most successful placer operations. In addition to providing efficient washing and recovery methods, the placer plant should be constructed as a compact unit that can be readily moved. This is an important
Batch Cyanidation of Flotation Concentrate
Table of ContentsThe Gold Leaching Process FlowsheetBATCH CYANIDATION CYCLESZINC PRECIPITATIONCHEMICAL CONSUMPTIONRemarks The production of gold bullion from gravity or flotation concentrates is often an important economic consideration for an isolated gold mining operation. It is assumed in this case that the coarse free gold has been recovered by the Mineral Jig in the grinding circuit and that the jig concentrate has
How Gold Is Made for Kids
Randal Birkey was commissioned by a Denver, Colorado graphic design firm in the 1980’s to prepare a series of illustrations on “How Gold is Made for Kids”. The illustration series was to be used by their client, Santa Fe Pacific, (now Newmont Gold), in printed corporate communication brochures, posters and other tools. The series was modified several times over the
Gold Leaching Process
Many opportunities exist throughout the world for small cyanide plants, possibly using a Gold Leaching Process, both for production and pilot operations, especially in areas not easily accessible, and where labor and local costs are on a level for profitable operation. Ores not fully amenable to treatment by amalgamation or flotation processes for the recovery of gold and silver can often
Small Gold Processing Plant
Table of ContentsCrushing and GrindingJigging and AmalgamationFlotation in a Small Gold Processing PlantCONCLUSIONS: Small Gold Processing Plant for Sale! The problem a Small Gold Processing Plant can solve is for the need to to provide a small, relatively simple and inexpensive gold mill that will operate at a reasonable profit with a minimum of supervision. The limited availability of skilled operating personnel, availability
Sulphide Gold Ore Treatment by Leaching and Flotation Process
Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost and at the same time obtain the highest net return. This latter point is most important. In many cases a gold mill using an all-cyanide flowsheet with fine grinding of all the ore will report
Gold and Silver Leaching by Cyanidation
Table of ContentsIntroduction to Gold and Silver LeachingGeneral Precious Metal Leaching TheoryHow Density of Solutions Affects LeachingWhat is the Effect of Aeration on Gold and Silver LeachingOxidizing Agents Decomposition of ReagentsHow Alkalinity (pH) Impacts Silver and Gold LeachingEffect Grinding and Particles Size Particle Size ClassificationGravity Gold Recovery in Grinding CircuitPre-Leaching Pulp ThickeningHow does Agitation Affect Gold and Silver Leaching KineticsGold and Silver Precipitation by
Crusher Product Gradation Charts
Table of ContentsScreen Analysis of Product from Jaw Crusher, Percent Passing Screen OpeningScreen Analysis of Product from Jaw Crusher, Percent Passing Screen Opening Aggregates required for a given job are generally specified by a full set of gradation limits and other relevant properties of the material. When rock is crushed, the product includes material of the size of the crusher setting,
Flash Flotation with Closed Circuit Grinding
Table of ContentsClosed Circuit Grinding Flowsheets with Flash Flotation EmbeddedClosed Circuit Grinding FLOWSHEET #1Closed Circuit Grinding FLOWSHEET #2Closed Circuit Grinding FLOWSHEET #3Closed Circuit Grinding FLOWSHEET #4LABORATORY TESTINGFlotation in a Grinding CircuitFlotation in Grinding CircuitsIncreased RecoveryImproved Concentrate Grade The reason why you need Flash Flotation in a Closed Grinding Circuit relates to “Recovering your mineral as soon as free” which has long
Easy Mill Expension: Grind Less, Float Coarse, at Higher Tonnage
Table of ContentsThe Problem with Coarse Flotation and RecoveryFine Flotation Circuit, 60 Tons/dayCoarse and Fine Flotation Circuit, 100 Tons/day The Problem with Coarse Flotation and Recovery Many flotation plants today are grinding to fine sizes. This means that money is being spent grinding worthless gangue which might be discarded at a coarser mesh. Many plants are treating ores in which the
Feldspar Beneficiation & Flotation Process
Table of ContentsThe Feldspar Beneficiation & Flotation Process FlowsheetFeldspar Ore CrushingFeldspar Ore GrindingFiltering and Drying of Feldspar ConcentrateDesliming and ConditioningFeldspar FlotationFeldspar Flotation ReagentsFeldspar Beneficiation ProcessFeldspar Market SpecificationsProduction ProblemsReagent Combinations Beneficiation by Flotation of feldspar is well established. It is a simple matter by flotation to remove the contaminating impurities and keep the alumina (Al2O3) content at 19% even on low grade feldspar ores. Dry
Diamond Processing Flow Chart of Beneficiation
Table of ContentsGeneral Diamond Process FlowchartDiamond Process FLOW CHART #1Diamond Process FLOWSHEET #2Diamond Processing Flow Chart #3 This is a Diamond Processing Chart as it was done in the 1950s. World demand and production of diamond both for gem and industrial purposes has increased nearly five-fold during the past 25 years. Improved mining and recovery methods together with the discovery and
Crushing & Screening Plant Design Factors
Table of ContentsAggregate Plant FlowsheetScientific Method to Design Crushing & Screening Plants Crushing Plant Design and Layout ConsiderationsCrushing Circuit “A’’ shows a small simple layout for use in mills up to 100 tons. In order to keep the flowsheet simple, and because of the use of the forced feed type of crusher, we can crush small tonnages up to 100
Agitated Copper Leaching & Cementation Process
Table of ContentsCHEMISTRY OF COPPER DISSOLUTIONThe Copper Leaching and Copper Cementation ProcessPREPARATION OF THE COPPER ORESTORAGE AND FEEDING THE ORECOPPER LEACHINGCHARGING THE AGITATED LEACH TANKSCOPPER PRECIPITATION & CEMENTATIONACID SUPPLYPRODUCTION OF SULPHURIC ACIDMATERIALS OF CONSTRUCTIONMATERIAL HANDLINGA new look at Agitated Tank Copper LeachingAgitated Leaching Copper Agitated Leaching and cementation process of copper problem: The treatment of copper ores, both oxides and sulfides by
Chalcopyrite (Cu) Sphalerite (Zn) Separation by Flotation
Table of ContentsThe Problem with separating Copper from Zinc by flotationThe Copper Zinc Process FlowsheetCRUSHINGROD MILLINGWASHING THICKENERSBALL MILL GRINDINGCONDITIONING AND BULK FLOTATIONREGRIND AND SELECTIVE FLOTATIONFLOTATION MACHINESRecommendations for Copper Zinc Separation by Flotation The Problem with separating Copper from Zinc by flotation The treatment of heavy sulphide ores of copper containing zinc and pyrite is often extremely difficult particularly if soluble copper and sulphates
Mineral Processing and Extractive Metallurgy Methods
Table of ContentsBatch TestingContinuous TestingFlowsheet DesignSelecting Equipment SizesMill Design A successful search for and development of a new mineral deposit rests not only in its discovery but also in economical processing of the ore. Via the Science of its engineering, Mineral Processing and Extractive Metallurgy allows the evaluation of metal recovery Methods laid-out or expressed as a process flowsheet. The challenge
Copper and Pyrite Separation by Selective and Sequential Flotation
Table of ContentsThe Problem with copper-pyrite oresThe copper pyrite separation Process FlowsheetCrushing circuit of a copper pyrite oreCopper pyrite ore Grinding circuitFlotation process of Copper-Pyrite mineralsSamplingThe Copper pyrite concentration process Summarized The Problem with copper-pyrite ores This flowsheet, is designed for the treatment of a copper-iron sulfide ore containing appreciable values in gold. The major portion of the gold is associated with the copper but