The Practice of Copper Smelting
The Practice of Copper Smelting
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75 per cent 41. 90 " " 12. 35 " " FeO ' 68. 85 28. 85 earths 68. 85 8. 5 "68. 85 100. 00 A slag of this nature, containing almost 46 per cent silica, although entirely feasible, is yet too silicious to melt easily and rapidly, and it would be decidedly more economical to add enough limestone (which is, ordinarily, the cheapest and most suitable flux) to reduce its content in SiO2 to about 40 per cent. The saving thus effected in coke, as well as in ease and rapidity of smelting, would far more ...than offset the cost of the limestone.
Limestone consists of CaCO 3 plus various foreign substances both bases and acids. As we are now looking for bases with which to reduce the silica content of our ore-mixture, we cannot tell how much limestone we need to use for the purpose until we know what proportion of bases our particular limestone con- tains.
Careful determinations establish that the analysis of the average limestone at our disposition is: SiO 2 3. 2 per cent FeO 3. 9 " " CaO 39. 4 " " MgO 9.
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You can find similar books in the "Read Also" column, or choose other free books by Edward Dyer Peters to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
75 per cent 41. 90 " " 12. 35 " " FeO ' 68. 85 28. 85 earths 68. 85 8. 5 "68. 85 100. 00 A slag of this nature, containing almost 46 per cent silica, although entirely feasible, is yet too silicious to melt easily and rapidly, and it would be decidedly more economical to add enough limestone (which is, ordinarily, the cheapest and most suitable flux) to reduce its content in SiO2 to about 40 per cent. The saving thus effected in coke, as well as in ease and rapidity of smelting, would far more ...than offset the cost of the limestone.
Limestone consists of CaCO 3 plus various foreign substances both bases and acids. As we are now looking for bases with which to reduce the silica content of our ore-mixture, we cannot tell how much limestone we need to use for the purpose until we know what proportion of bases our particular limestone con- tains.
Careful determinations establish that the analysis of the average limestone at our disposition is: SiO 2 3. 2 per cent FeO 3. 9 " " CaO 39. 4 " " MgO 9.
What to read after The Practice of Copper Smelting?
You can find similar books in the "Read Also" column, or choose other free books by Edward Dyer Peters to read onlineMoreLess
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