Technical Paper - Bureau of Mines
Technical Paper - Bureau of Mines
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These experiments have afforded interesting data on the rise of temperature when solid aluminum is added to liquid copper. Though most of the melts were made under such conditions that copper oxide was probably present in the liquid copper, some showed that a tem- perature rise was obtained even when aluminum was added to copper melted under charcoal, and others indicated that the temperature rise observed on adding solid copper to liquid aluminum continued with successive additions. These data... prove that part of the tem- perature rise is due to oxidation of the aluminum and part of it to heat of formation of the alloys. Practically, therefore, it is advis- able to employ oxygen- free copper for making the rich alloys, and the copper should either be deoxidized before pouring into the aluminum, or it should be melted under reducing conditions in order to prevent the presence of any considerable amount of cuprous oxide in the copper bath.
Moreover, in the manufacture of rich alloys, it is desirable to have low dross losses as well as to keep down the melting costs.
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To quickly assess the difficulty of the text, read a short excerpt:
These experiments have afforded interesting data on the rise of temperature when solid aluminum is added to liquid copper. Though most of the melts were made under such conditions that copper oxide was probably present in the liquid copper, some showed that a tem- perature rise was obtained even when aluminum was added to copper melted under charcoal, and others indicated that the temperature rise observed on adding solid copper to liquid aluminum continued with successive additions. These data... prove that part of the tem- perature rise is due to oxidation of the aluminum and part of it to heat of formation of the alloys. Practically, therefore, it is advis- able to employ oxygen- free copper for making the rich alloys, and the copper should either be deoxidized before pouring into the aluminum, or it should be melted under reducing conditions in order to prevent the presence of any considerable amount of cuprous oxide in the copper bath.
Moreover, in the manufacture of rich alloys, it is desirable to have low dross losses as well as to keep down the melting costs.
What to read after Technical Paper - Bureau of Mines?
You can find similar books in the "Read Also" column, or choose other free books by United States Bureau of Mines to read onlineMoreLess
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