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Process for the destructive distillation of carbonaceous materials
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Process for producing carbon black
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Coal coking by cyclically circulated hot inert gases
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Thermal molecular alteration of carbon compounds
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Process of producing ferrosilicon
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Pyrometallurgical process for the production of pig-iron and ferrochromium
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Preparation of ferro-chromium in blast furnaces
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Smelting manganese ore
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Process for reducing manganese ores
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Production of ferrochromium
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Blast furnace treatment of low grade manganese-iron ore
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Process for utilization of manganese-iron ores
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