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US1254316A
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Process of treating ores.
|
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US1215635A
|
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Sintering and smelting ore.
|
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US1169384A
|
|
Apparatus for sintering and smelting ores.
|
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US1238279A
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Process of treating substances carrying sulfur and metals.
|
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US1169069A
|
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Desulfurizing and smelting ores.
|
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US1169139A
|
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Apparatus for and process of ore treatment.
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CA129557A
|
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Ore roasting apparatus
|
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CA123416A
|
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Apparatus for roasting and sintering ores
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US882518A
|
|
Process of roasting and sintering ores.
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US882517A
|
|
Process of treating ores.
|
|
US959484A
|
|
Art of smelting ores.
|
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US721505A
|
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Apparatus for forming blast-furnace charges.
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