Book Only - Other Items Not Included
"A Textbook of Fire Assaying "
by Edward E. Bugbee
The
book is accepted as the premier reference text on Fire Assaying. There
is a complete discussion on the fire assay process, including PGM
(platinum group metals) assays, complex ores, mill and smelter
products, plus bullion and lead assays. The coverage of the theory of
fire assaying has made the book popular as a school text. Also the
section on practical assaying as well as suggestions for commercial
assaying have generated a great interest in this publication..
CHAPTER I
ASSAY REAGENTS AND FUSION PRODUCTS - Pages 1-20
Definitions. Acids and Bases. Reagents. Chemical Reactions of Reagents. Fusion Products.
CHAPTER II
FURNACES AND FURNACE ROOM SUPPLIES - Pages 21-44
Crucible Furnaces. Muffle Furnaces. Sources of Heat. Coal Furnaces.
Wood Furnaces. Coke Furnaces. Gasoline Furnaces. Gas Furnaces. Fuel Oil
Furnaces. Electric Furnaces. Furnace Repairs. Muffles. Crucibles.
Scorifiers. Furnace Tools.
CHAPTER III
ORE SAMPLING - Pages 45-73
Methods. Principles of Sampling. Sampling Practice. Hand Cutting.
Machine Cutting. Moisture Sampling. Duplicate Sampling. Finishing the
Sample. Sampling Ores Containing Malleable Minerals.
CHAPTER IV
BALANCES AND WEIGHTS - Pages 74-91
Flux Balance. Pulp Balance. Assay Balance. Theory of Balance.
Directions for Use of Balance. Weighing by Equal Swings. Weighing by
Method of Swings. Weighing by No Deflection. Weighing by Substitution.
Check Weighing. Adjusting and Testing Assay Balance. Weights.
Calibration of Weights.
CHAPTER V
CUPELLATION - Pages 92-125
Bone Ash. Making Cupels. Description of Process. Practice in
Cupellation. Assay of Lead Bullion. Loss of Silver in Cupeling. Loss of
Gold in Cupeling. Effect of Silver on the Loss of Gold in Cupeling.
Influence of Impurities on the Loss of Precious Metals during
Cupellation. Rule Governing Cupellation Losses. Indications of Metals
Present. Indications of Rare Metals. Retention of Base Metals. Portland
Cement and Magnesia Cupels. Color Scale of Temperature.
CHAPTER VI
PARTING - Pages 126-133
General Statement. Parting in Porcelain Capsules. Inquartation. Parting
in Flasks. Influence of Base Metals on Parting. Indications of Presence
of Rare Metals. Errors Resulting from Parting Operations. Testing
Nitric Acid for Impurities. Testing Wash Water. Testing Silver Foil for
Gold.
CHAPTER VII
THE SCORIFICATION ASSAY - Pages 134-148
General Statement. Ignition Temperatures of Metallic Sulfides. Heats of
Formation of Metallic Oxides. Solubility of Metallic Oxides in
Litharge. Assay Procedure for Ores. Chemical Reactions. Indications of
Metals Present. Assay of Granulated Lead. Scorification Assay of Copper
Matte. Losses in Scorification. Scorification Charges for Different
Materials.
CHAPTER VIII
THE CRUCIBLE ASSAY - Pages 149-198
Theory of the Crucible Assay. Classification of Ores. Crucible Slags.
Classification of Silicates. Action of Borax in Slags. The Lead Button.
The Cover. Reduction and Oxidation. Reducing Reactions. Reducing Power
of Minerals. Oxidizing Reactions. Testing Reagents. Slags for Class 1
Siliceous Ores. Slags for Class 1 Basic Ores. Assay Procedure for Class
1 Ores. Assay of Class 2 Ores. The Niter Assay. Slags for Pure Ores.
Slags for Impure Ores. Conduct of the Fusion. Physical and Chemical
Changes Taking Place in Niter Fusion. Preliminary Fusion. Estimating
Reducing Power. Calculation of Assay Charge. Procedure for the Regular
Fusion. The Soda-Iron Method. Chemical Reactions. The Slag. Procedure.
The Roasting Method. Assay of Class 3 Ores.
CHAPTER IX
THE ASSAY OF COMPLEX ORES AND SPECIAL METHODS - Pages 199-219
Assay of Ores Containing Nickel and Cobalt. Assay of Telluride Ores.
Assay of Ores and Products High in Copper. Assay of Zinc-Box
Precipitate. Assay of Black Sands and Similar Substances. Assay of
Cyanide Mill Slime Pulp and Tailing. Assay of Ores and Products
Containing Bismuth. Assay of Antimonial Ores. Assay of Auriferous
Tinstone. Corrected Assays.
CHAPTER X
SAMPLING AND ASSAYING OF BULLION - Pages 220-239
Definitions. Sampling Bullion. Lead Bullion. Copper Bullion. Dore
Bullion. Gold Bullion. A say of Lead Bullion. Assay of Copper Bullion.
Scorification Method. Crucible Method. Nitric Acid Combination Method.
Mercury-Sulphuric Acid Method. Assay of Dore Bullion. United States
Mint Assay of Gold Bullion.
CHAPTER XI
THE ASSAY OF SOLUTIONS - Pages 240-246
Evaporation in Lead Tray. Evaporation with Litharge. Precipitation by
Zinc and Lead Acetate. Precipitation by Copper Salts. Electrolytic
Precipitation. Colorimetric Method of Testing Barren Cyanide Solutions
for Gold.
CHAPTER XII
THE LEAD ASSAY - Pages 247-253
Lead Ores. Accuracy and Limitations of Method. Quantity of Ore and
Reagents Used. Influence of Other Metals. Procedure for Assay. Assay of
Slags. Chemical Reactions.
CHAPTER XIII
THE ASSAY OF ORES AND PRODUCTS CONTAINING METALS OF THE PLATINUM GROUP - Pages 254-292
Occurrence. Minerals. Sampling. Field of the Fire Method. Indications.
Detection. Identification. Treatment of Ores Containing Metallic
Grains. Determination of Platinum, Gold, and Silver by the Sulphuric
Acid Parting Method. Direct Determination of Palladium, Platinum, and
Gold. Determination of Small Amounts of Platinum in Cupellation Beads
by Microfiltration. The Determination of Silver in Ores, Wastes, and
Alloys Containing Platinum and Palladium. Assay of Ores and Other
Material Containing. Iridium, Iridosmium, Rhodium, and Ruthenium.
Determination of Iridium in Platinum Alloys.
CHAPTER XIV
PRACTACAL ASSAYING - Pages 293-308
Requirements in Commercial Assaying. Varying Degrees of Precision.
Preparation of Samples. Avoidance of Confusion of Samples. Assay Office
Records. Directions for Assay Fluxing. Time and Labor Saving. Assay
Fluxing in Routine Assaying. High Precision Weighing. Equilibrium in
Fire Assaying.
INDEX. - Pages 309
