Many assay methods for the determination of gold or silver, or both, in cyanide solutions have been published, which with care in manipulation, and modification
Table of ContentsReverberatory Furnace RefiningWhy Reverberatory Refining is SuperfluousEffect of Cuprous Oxide on CopperElectric Furnace Melting of Cathode CopperFactors Governing Use of the Electric FurnaceElectric Furnace AdvantagesTypes of Electric Furnaces for Melting of
Table of ContentsStoping MethodsClassification of stoping methodsStopes Naturally Supported Open StopesStopes Artificially SupportedShrinkage StopingCut & Fill StopingStulled Stopes in Narrow VeinsSquare-Set StopingCaved Stopes Mining MethodMining by
Since the writer has been intimately connected with the development of manganese steel for many years, some remarks upon the early work with regard to
When mixed with common cast steel in quantities ranging from 11 to 13½ per cent. and properly treated, manganese increases the ductility of the metal
Table of ContentsShaft Stations, Storage, and Loading PocketsHoisting in BucketsHoisting in Cars on CagesHoisting in SkipsCost of Stations and Pockets Shaft Stations, Storage, and Loading
Ore passes are simply vertical or inclined openings for transfer of broken ore to the haulage system. They may be raises in the ore or
Table of ContentsPlatform or “Chinaman” chuteStopboard chutesVertical overcut or guillotine-type gateSliding undercut gatesHinged gatesOvercut arc gatesUndercut arc gatesFinger gatesFinger chutesCurtain or flexible-door gateCost of Installation
The object of the first classification done in cyaniding work was to produce a leachable sand and overflow as small an amount of sand as
Table of ContentsDriftingRaisingStopingOpencut The hammer drill rightly receives the credit for having made the one-man drill possible, and so many economies seem possible through the
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