Manual of Assaying Gold, Silver, Copper And Lead Ores
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In our eReader you can find the full English version of the book. Read Manual of Assaying Gold, Silver, Copper And Lead Ores Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Manual of Assaying Gold, Silver, Copper And Lead Ores
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To quickly assess the difficulty of the text, read a short excerpt:
Mitchell says: " Ordinary litharge can be easily freed from this oxide by fusing it and pouring it into a cold ingot mould, then pulverizing, and carefully keeping it from contact with air, as it readily absorbs oxygen, and if it be allowed to cool in the atmos- I04 MANUAL OF ASS A YING.
phere, it will nearly' all be converted into the red oxide." Litharge can quite easily be procured free from large quantity of red oxide, and if it is kept in a tightly-stoppered bottle or tin can with closely ...fitting cover, there is little dan- ger of conversion to this oxide.
It is used to furnish metallic lead that serves as a solvent for the precious metals in the ore. When in the melted state it has the power of giving up its oxygen to almost all the metals (save gold, silver and those of the platinum group), converting them into oxides, and since these are generally ex- tremely fusible, they go into the slag. Thus we are able to separate gold and silver from any baser metals they may be combined or associated with.
What to read after Manual of Assaying Gold, Silver, Copper And Lead Ores?
You can find similar books in the "Read Also" column, or choose other free books by Walter Lee Brown to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Mitchell says: " Ordinary litharge can be easily freed from this oxide by fusing it and pouring it into a cold ingot mould, then pulverizing, and carefully keeping it from contact with air, as it readily absorbs oxygen, and if it be allowed to cool in the atmos- I04 MANUAL OF ASS A YING.
phere, it will nearly' all be converted into the red oxide." Litharge can quite easily be procured free from large quantity of red oxide, and if it is kept in a tightly-stoppered bottle or tin can with closely ...fitting cover, there is little dan- ger of conversion to this oxide.
It is used to furnish metallic lead that serves as a solvent for the precious metals in the ore. When in the melted state it has the power of giving up its oxygen to almost all the metals (save gold, silver and those of the platinum group), converting them into oxides, and since these are generally ex- tremely fusible, they go into the slag. Thus we are able to separate gold and silver from any baser metals they may be combined or associated with.
What to read after Manual of Assaying Gold, Silver, Copper And Lead Ores?
You can find similar books in the "Read Also" column, or choose other free books by Walter Lee Brown to read onlineMoreLess
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