Blogs
Washing Activated Carbon
In the process of washing activated carbon, a dilute hydrochloric acid solution (3%) is circulated/pumped into the elution column. The acid dissolves inorganic foulants such as calcium carbonate, magnesium and sodium salts, fine ore Minerals such as silica, and fine iron particles. The carbon acid wash cycle takes about 4.30 hours. Acid washing may also help in removing some of the
Electrolytic Gold Extraction
Table of ContentsGold Amalgamation ProcessGold ChlorinationCyanide ProcessElectrolytic Gold Extraction Experiment Stirring ApparatusUsing Electricity as a Method of Gold ExtractionConcluding the Electrolytic Extraction of Gold Gold is so widely distributed in nature and is so much desired on account of its value that the metallurgy of gold is not only one of the most fascinating but also one of the most important industries. Gold occurs in several
Autoclave Circuit & Gold
Slurry from the grinding circuit, at approximately 35% solids and 80—85% passing 135 mm is pumped to three thickeners. Thickener underflow, at approximately 54% w/w solids, is pumped to a train of four acidulation tanks. Sulfuric acid is added to the slurry to destroy sufficient carbonate prior to entering the autoclave circuit. Process air is also injected into the acidulation
SAG Mill Liner Design
Table of ContentsMill InternalsGrinding Mill Shell DesignSemi-Autogenous Mill Liners Designs Alloys and Maintenance ProceduresGood Mill Liner Alloys And Design Installation and Prudent Operational PracticesGeneral Liner Design PrinciplesIdeal Liner DesignSemi-Autogenous Grinding (SAG) Mills“High-Low” Liner SystemsFully Autogenous Grinding (FAG) MillsDischarge End DesignsDischarge End Mechanical ConsiderationsAlloys for Cost-EffectivenessS.A.G. MillsF.A.G. MillsInstallation & Maintenance“Grinding Out”Recommended Shutdown SequenceOperation- GeneralConclusions To a more significant degree than in
SAG Mill Grinding Circuit Design
Table of ContentsBall Charge Motion inside a SAG MillSAG Mill vs Ball MillSAG Mill Liner DesignSAG Mill Circuit SamplingSAG Mill OperationSemi Autogenous Design FactorsSAG Mill Operation ExampleProcess Plant DescriptionSAG Mill Design and SpecificationOperating Problems Since CommissioningDesign Changes and Future Operating Strategies AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form
High Clay Tailings Filtration
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How to Improve Flotation Results
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Froth Crowding to improve Flotation Carrying Capacity and Grade-Recovery
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How to Best do Maintenance on Flotation Cells
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Flotation Circuit Recovery Optimization
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Tower Mill Operating Work Index
The principal method of grinding in a Tower mill is attrition (scrubbing of particles off material being ground), with the possibility of some shearing and compression breakage taking place due to the motion of the media charge created by the rotation of the helical screw enhancing the media pressure. The Tower mill is filled to a level with grinding media
Mineral Processing Plant Design & Construction Example
Table of ContentsMineral Processing Plant LocationOrePowerWaterCRUSHINGGRINDING CIRCUITMINERAL JIGFLASH FLOTATION CELLLEAD FLOTATIONZINC CONDITIONERZINC FLOTATIONPILOT SHAKER TABLEFLOTATION REAGENTSREAGENT FEEDERSCONCENTRATE DEWATERINGFROTH PUMPSMOTORSMETALLURGICAL SAMPLINGMETALLURGICAL LaboratoryMill Building Metallurgical Recovery, which consists of the percentage of mineral saved, must not be confused with economic recovery which covers the percentage of the gross value of an ore recovered as a net profit. In other words, in commercial practice the
Coarse and Fine Particle Flotation Recovery
Table of ContentsCoarse VS Fine FlotationApplication to Flowsheet Design In The Days of gravity concentration, the art of ore dressing developed on the cardinal principle of saving the values at as coarse a size as possible. Flowsheets were designed which featured an alternation of crushing and concentrating operations. Thus an ore might be crushed to ½ inch, jigged to yield a finished
Mineral Processing and Extractive Metallurgy
Table of ContentsTwo LEADING Mineral Processing and Extractive Metallurgy METHODSMINERAL JIGFLASH FLOTATION CELLIN GRINDING CIRCUITTESTING COMPLEX ORESPROCESSING A COMPLEX MINERALSA HIGHLY COMPLEX MINERALMineral Processing and Extractive Metallurgy Flowsheet The first objective of Mineral Processing and Extractive Metallurgy is to remove the Mineral as soon as freed and as coarse as possible” is the first rule in treating complex ores. Ores containing two or three
Mineral Processing and Ore Dressing
Table of ContentsMilling History AmalgamationConcentration of MineralsBulk FlotationSelective FlotationFlotation of Nonmetallic MineralsOrder of Mineral FloatabilityLeaching by Cyanidation Before the event of ore dressing, crude ores were shipped directly to the smelters, or the refineries, with the shipper paying the freight and treatment charges. These charges varied with the type of ore and the distance from the smelter. In all cases they were
Sodium Thiosulphate Gold Leaching
The gold industry has been seeking alternative reagents for leaching gold from low-grade ores for the past 25 years. The cost and transport of cyanide, the poor recovery of gold from carbonaceous ores, the lack of selectivity of cyanide towards copper minerals and the cost of waste treatment are real factors which can make cyanide unattractive in some circumstances. However
Thickeners
Table of ContentsSpecifications and thickener rake designThickener Sizes and SuperstructureThickener Rakes and SupportsMajor Factors Influencing Thickener Design3′ to 20′ Spiral Rake ThickenerThickener Designed with Beam + Metal Tank5′ to 20′ Diameter ThickenerThickener Designed with Beam+ Wooden Tank22′ to 50′ Diameter ThickenerThickener Designed with Beam + Steel TankThickener Designed with Beam + Wood Tank50′ to 80′ Diameter ThickenerThickener Designed with Truss + Steel or Wood TankThickener Designed with Truss + Concrete TankThickener Types
Wooden Tank Capacity Tables – Diameter X Height
Source: This article is a reproduction of an excerpt of “In the Public Domain” documents held in 911Metallurgy Corp’s private library.
Suction-Pressure Diaphragm Pumps
Table of ContentsSuction-Pressure Diaphragm Pump Working Principle and OperationsStroke Adjustment and CapacityAdvantages of a Suction-Pressure Diaphragm PumpHeight of LiftSuction-Pressure Diaphragm Pump AssemblySuction-Pressure Diaphragm Pump CapacitySpecifications ¾” Size Suction-Pressure Diaphragm Pump Working Principle and Operations Each Suction-Pressure Diaphragm Pump consists essentially of a pump bowl, in a vertical position, with one rubber diaphragm on the ¾” size and two molded rubber diaphragms on the
Flotation Cells
Table of ContentsFlotation Cells in Mineral Processing“Sub-A” Flotation Cells in Corrosive Circuits“Sub-A” Flotation Cells—GrainPrinciples of Operation of the “Sub-A” Flotation CellsPulp Flow and CirculationFlotation Cells Aeration and MixingFlotation Cell Separation Mineral Metal ConcentrationOperating Advantages with “Sub-A”Coarse Material Handled by the Flotation CellsNo Choke Ups or Lost TimeMiddling Returns Without PumpsPositive Cell ControlMetallurgical Advantages with “Sub-A” SelectivityRecovery:Balanced Products AnalysisFlotation Cell Capacities(1) Capacity:(2) Volume:(3) Results:Flotation Cell Sizes