Economic Mining a Practical Handbook for the Miner the Metallurgist And the Me
Economic Mining a Practical Handbook for the Miner the Metallurgist And the Me
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In our eReader you can find the full English version of the book. Read Economic Mining a Practical Handbook for the Miner the Metallurgist And the Me 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 Economic Mining a Practical Handbook for the Miner the Metallurgist And the Me
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Usually, fullers' earth deposits are worked by stripping the over- burden and quarrying the mineral by open cuts, but in the Woburn Sands, properly timbered underground galleries are now driven, replacing the series of little independent pits or " earth wells " which were favoured when the industry was in the hands of numerous small operators.
The mineral as taken from the workings is always mixed with more or less foreign substances, and needs preparation. This consists in crushing and levigat...ing, by which the finest particles (or valuable portion) are carried off in suspension by a stream of water to settling tanks, while the coarser (chiefly impurities) are arrested, quite a great length of shallow trough with slight ribs across the bottom being necessary to effect complete separation. The apparatus is called a " maggie " in Devonshire and Somersetshire. Finally the impalpable mud of fullers' earth is dried, first by standing for a long time in tanks, from which the water is drawn off by degrees from the surface downwards by means of little holes in the sides, stopped by pegs ; and lastly by applying fire beneath a very large shallow tank, with a floor of porous tiles, lying over a series of wide flat flues, the heat from the fire passing through all the flues to a chimney, and thus sucking much of the moisture through the porous floor.
What to read after Economic Mining a Practical Handbook for the Miner the Metallurgist And the Me?
You can find similar books in the "Read Also" column, or choose other free books by Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Usually, fullers' earth deposits are worked by stripping the over- burden and quarrying the mineral by open cuts, but in the Woburn Sands, properly timbered underground galleries are now driven, replacing the series of little independent pits or " earth wells " which were favoured when the industry was in the hands of numerous small operators.
The mineral as taken from the workings is always mixed with more or less foreign substances, and needs preparation. This consists in crushing and levigat...ing, by which the finest particles (or valuable portion) are carried off in suspension by a stream of water to settling tanks, while the coarser (chiefly impurities) are arrested, quite a great length of shallow trough with slight ribs across the bottom being necessary to effect complete separation. The apparatus is called a " maggie " in Devonshire and Somersetshire. Finally the impalpable mud of fullers' earth is dried, first by standing for a long time in tanks, from which the water is drawn off by degrees from the surface downwards by means of little holes in the sides, stopped by pegs ; and lastly by applying fire beneath a very large shallow tank, with a floor of porous tiles, lying over a series of wide flat flues, the heat from the fire passing through all the flues to a chimney, and thus sucking much of the moisture through the porous floor.
What to read after Economic Mining a Practical Handbook for the Miner the Metallurgist And the Me?
You can find similar books in the "Read Also" column, or choose other free books by Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 to read onlineMoreLess
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