Notes On Assaying And Metallurgical Laboratory Experiments
Notes On Assaying And Metallurgical Laboratory Experiments
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* Or sufficient to reduce the Pb. (See pages 73, 89, and 90. ) t See pages 75 and 76.
13 - NOTES ON ASSAYING.
If more than i A. T. Of ore is taken, increase the fluxes some- what. Do not change the litharge where 30 grammes are used, and take only sufficient reducing agent to give a lead button of the desired size. Personally I do not believe in using more than i A. T. Of ore in a G or H crucible because sufficient fluxes can- not be added to decompose the ore without the charge boiling over, y...et I know that some assayers use as high as 4 A. T.
If an ore contains copper running not over 25%, assay it for gold as described in the Assay of Ores for Silver, Special Methods. That is, take only J A. T. Of ore in place of i A. T. , use high litharge and silica in order to slag the copper, and an amount of reducing agent sufficient to just bring down a lead button of the desired size. Keep the active fluxes two or more times the ore, as described under assay of ores for silver.
Fusion in the Muffle.
What to read after Notes On Assaying And Metallurgical Laboratory Experiments?
You can find similar books in the "Read Also" column, or choose other free books by Richard Walley Lodge to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
* Or sufficient to reduce the Pb. (See pages 73, 89, and 90. ) t See pages 75 and 76.
13 - NOTES ON ASSAYING.
If more than i A. T. Of ore is taken, increase the fluxes some- what. Do not change the litharge where 30 grammes are used, and take only sufficient reducing agent to give a lead button of the desired size. Personally I do not believe in using more than i A. T. Of ore in a G or H crucible because sufficient fluxes can- not be added to decompose the ore without the charge boiling over, y...et I know that some assayers use as high as 4 A. T.
If an ore contains copper running not over 25%, assay it for gold as described in the Assay of Ores for Silver, Special Methods. That is, take only J A. T. Of ore in place of i A. T. , use high litharge and silica in order to slag the copper, and an amount of reducing agent sufficient to just bring down a lead button of the desired size. Keep the active fluxes two or more times the ore, as described under assay of ores for silver.
Fusion in the Muffle.
What to read after Notes On Assaying And Metallurgical Laboratory Experiments?
You can find similar books in the "Read Also" column, or choose other free books by Richard Walley Lodge to read onlineMoreLess
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