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AU1900410B
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Improvements in or relating' to electric furnaces
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AU1786310B
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Improvements in electric furnaces
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CA128311A
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Electric furnace
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US975217A
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Treatment of zinc ores by the precipitation process.
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GB190928487A
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Improvements in the Extraction of Zinc from Zinc Sulphide Ores.
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US950882A
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Electric furnace.
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US994217A
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Electric furnace.
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US950905A
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Method of protecting resisters of electric furnaces.
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US950879A
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Electric furnace.
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US950881A
|
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Electric furnace.
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US950880A
|
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Electric furnace.
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US950878A
|
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Furnace.
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US950904A
|
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Electric furnace.
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US950877A
|
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Electric furnace.
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US951086A
|
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Electric furnace.
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AU1370709B
|
|
Treatment of zinc ores bythe precipitation process
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US927857A
|
|
Process of reducing zinc ores.
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CA110700A
|
|
Ore preicipitation
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US894383A
|
|
Treatment of ores by means of the precipitation process.
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|
US875580A
|
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Metallurgical method of treating oxidized zinc ores (calamins, oxids, silicates) by the precipitation process.
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