Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books 1 - 5 of 5 on By this treatment the antimony, copper, and other impurities become oxidized, and,....
" By this treatment the antimony, copper, and other impurities become oxidized, and, rising to the surface, are skimmed off, and removed by means of an iron rake. The length of time necessary for the purification of hard lead obviously depends on the nature... "
The Mining and Metallurgy of Gold and Silver - Page 454
by John Arthur Phillips - 1867 - 532 pages
Full view - About this book

Mining Magazine: Devoted to Mines, Mining Operations, Metallurgy & C

1860
...side of the furnace, and subsequently ladled into it through an iron gutter adapted for that purpose. The length of time necessary for the purification...depends on the nature and amount of the impurities which it contains ; and, consequently, some varieties will be sufficiently improved at the expiration...
Full view - About this book

The Mining and Statistic Magazine: Devoted to Mines, Mining Operations ...

1860
...side of the lurnace, and subsequently ladled into it through an iron gutter adapted for that purpose. The length of time necessary for the purification...depends on the nature and amount of the impurities which it contains ; and, consequently, some varieties will be sufficiently improved at the expiration...
Full view - About this book

Spons' dictionary of engineering, ed. by O. Byrne (and Spon). 8 div

Spon E. & F.N., ltd - 1874
...antimony, copper, and other impurities become oxidized, and, rising to the surface, are skimmed off, and removed by means of an iron rake. The length of...softening the argentiferous lead obtained from the Oastilian furnace, when working ordinary ores, is about thirty-six hours. The charge of the reverberatory...
Full view - About this book

Spons' Dictionary of Engineering, Civil, Mechanical, Military, and ..., Volume 3

Edward Spon - Engineering - 1874
...antimony, copper, and other impurities become oxidized, and, rising to the surface, are skimmed off, and removed by means of an iron rake. The length of...softening the argentiferous lead obtained from the Castilian furnace, when working ordinary ores, is about thirty-six hours. The charge of the reverberatory...
Full view - About this book

Spons' Dictionary of Engineering, Civil, Mechanical, Military, and ..., Volume 8

Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - Engineering - 1874
...become oxidized, and, rising to the surface, aro skimmed off, and removed by means of an iron rake. Tho length of time necessary for the purification of hard...impurities with which it is associated ; and consequently sumo varieties will be sufficiently softened at the expiration of twelve hours, whilst in other instances...
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download PDF