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US2578790A
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Froth flotation of ferruginous impurities from finely divided granite rock
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US2536058A
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Method of treating glass sands
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Concentration of iron ores
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US2571866A
|
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Concentration of land pebble phosphate
|
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US2459967A
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Concentration of nonsulfide ores
|
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US2459219A
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Concentration of nonsulfide, nonsilicate ores with nitric acid treated fatty acids
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US2461817A
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Concentration of phosphate minerals from their ores
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US2461813A
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Concentration of phosphate minerals
|
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|
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Making of barite concentrates useful in drilling muds
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Two-stage amine flotation of glass sands
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US2459966A
|
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Concentration of nonsulfide ores
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Concentration of ores
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GB604509A
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Improvements in or relating to the concentration of iron ores
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Froth-flotation concentration of sylvite from sylvinite ores
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GB584938A
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Improvements in or relating to the purification of industrial sands
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Process of concentrating ores
|
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Concentration of oxidized iron ores
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Concentration of oxidized iron ores
|
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US2409665A
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Purification of industrial sands
|
|
US2364777A
|
|
Concentration of oxidized iron ores
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