Tchiatouri manganese ore are unfavorable in that the proportion of large pieces obtained is small, and much of the ore is quite soft, and grinds to a fine powder during the handling incidental to mining, cleaning and transportation. The loss of ore during... Bulletin of the United States Geological Survey - Seite 210von Geological Survey (U.S.) - 1910Vollansicht - Über dieses Buch
| Geological Survey (U.S.) - 1898 - 692 Seiten
...proportion of large pieces obtained is small and much of the ore is quite soft, grinding to a fine powder during the handling incidental to mining, cleaning, and transportation. The loss of ore during transportation is thus larger than it otherwise would be, while the high proportion of fine... | |
| 1917 - 402 Seiten
...the proportion of large pieces obtained is small. Much of the ore is quite soft, and grinds to a fine powder during the handling incidental to mining, cleaning, and transportation. The loss of ore during concentration and transport is therefore considerable ; and much of the fine ore shipped is... | |
| Edmund Cecil Harder - 1910 - 916 Seiten
...the proportion of large pieces obtained is small, and much of the ore is soft anil grinds to a fine powder during the handling incidental to mining, cleaning,...district: Analysis of well-sorted and cleaned ore from Chiaturi, Russia.0 [Dried at 212° F.] MnO2 86.25 MnO... Cu oxide Ni oxide A1303 CaO MgO BaO K2OandNa/>... | |
| 1916 - 822 Seiten
...proportion of large pieces obtained is small, and much of the ore is quite soft, and grinds to a fine powder during the handling incidental to mining, cleaning and transportation. The loss of ore during concentration and transport is therefore considerable; and much of the fine ore shipped is considered... | |
| Geological Survey (U.S.) - 1898 - 696 Seiten
...proportion of large pieces obtained is small and muuL of the ore is quite soft, grinding to a fine powder during the handling incidental to mining, cleaning, and transportation. The loss of ore during transportation is thus larger than it otherwise would be, while the high proportion of fine... | |
| |