Silver Assaying & Cupellation

A great deal has been written of late regarding the loss of silver in assaying; very discordant results have been published by different writers, and much

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Classification

Settling Tank Spitzkasten Classifier

Table of ContentsForm of the CurrentThe Slope of the Feed-Sole In “ Sorting Before Sizing ” (a paper first announced at the Pittsburgh meeting, but delayed in

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Laboratory Procedures

Cementation of Gold by Zinc Shavings

Some months since, the attention of the author was directed to certain statements to the effect that the gold-contents of foul or extremely dilute cyanide-solutions

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Electrolytic Assay

The analysis of refined copper is a subject of great importance, and has not received the attention it deserves. Copper metallurgists, therefore, will welcome the

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Assay Determination of Arsenic & Antimony

Table of ContentsDetermination of Arsenic as TrisulphideTreatment of Filtrate Containing AntimonyTreatment of Insoluble Residue from the ElectrolyteLaboratory Experiment No. 8Laboratory Experiment No. 9Laboratory Experiment No. 10Laboratory Experiment No.

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Leaching Sulfides by Sulphuric Acid: Copper

Table of ContentsAcid Leaching PlantBoiling PotsDissolving TankFiltersPrecipitating TanksSilver FiltersEvaporatorsCrystallizersResidue FiltersAcid StorageSilver DryerHydraulic PressMelting FurnacePulverizerPumpsInstallationProcessPractical OperationsSuppliesLaborReturnsBoiling Sulphides in Strong Sulphuric Acid The improvement in leaching introduced

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Leaching

Cyanide Chemistry & Gold Extraction

Table of ContentsSolution of Gold in Cyanide SolutionsSolution of Metallic Gold in Potassium, CyanideWhat Effect Oxidizing Agents has on LeachingSolubility of Gold Sulphide in Potassium CyanideSolubility

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