Practical Metallurgy An Elementary Text book for the Use of Classes Under Subje
Practical Metallurgy An Elementary Text book for the Use of Classes Under Subje
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42 Fireclay and Crucibles.
Experiment 64. Pass a quantity of steam coal through 10 sieve. Weigh out 500 grs. And place in small fireclay crucible, taking care to have it covered with a well-fitting lid. Heat for 20 minutes ; allow to cool while still covered. Examine and weigh the coke. Note the quality of the coke, whether hard or soft, firm or friable, dense or porous.
Experiment 65. Pass the remainder of the steam coal through 60 sieve. Weigh out 30 grs. And heat in porcelain crucible for th...e estimation of the ash, proceeding as with the anthracite. When cool, weigh and note the appearance of the residue. Repeat the above experiments with any other kind of coal obtainable.
FIRECLAY AND CRUCIBLES.
THE term clay is given to certain plastic earths which contain large amounts of silica and alumina, and also water in a state of chemical combination. It is to this combined water that they owe their plasticity.
Clays contain, as impurities, varying amounts of lime, iron, magnesia, potash, soda, sulphur, &c.
What to read after Practical Metallurgy An Elementary Text book for the Use of Classes Under Subje?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Roland Gower to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
42 Fireclay and Crucibles.
Experiment 64. Pass a quantity of steam coal through 10 sieve. Weigh out 500 grs. And place in small fireclay crucible, taking care to have it covered with a well-fitting lid. Heat for 20 minutes ; allow to cool while still covered. Examine and weigh the coke. Note the quality of the coke, whether hard or soft, firm or friable, dense or porous.
Experiment 65. Pass the remainder of the steam coal through 60 sieve. Weigh out 30 grs. And heat in porcelain crucible for th...e estimation of the ash, proceeding as with the anthracite. When cool, weigh and note the appearance of the residue. Repeat the above experiments with any other kind of coal obtainable.
FIRECLAY AND CRUCIBLES.
THE term clay is given to certain plastic earths which contain large amounts of silica and alumina, and also water in a state of chemical combination. It is to this combined water that they owe their plasticity.
Clays contain, as impurities, varying amounts of lime, iron, magnesia, potash, soda, sulphur, &c.
What to read after Practical Metallurgy An Elementary Text book for the Use of Classes Under Subje?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Roland Gower to read onlineMoreLess
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