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ES201620A1
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A procedure for the reduction of minerals, mainly of iron minerals (Machine-translation by Google Translate, not legally binding)
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ES145416A1
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Improvements in a method to reduce minerals, particularly iron ore.
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ES101337A1
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A method to reduce to carbon monoxide the carbonic acid of gases that contain it.
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GB130334A
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Improvements in or relating to the Reduction of Ores and Oxygen Compounds utilised as Ores.
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CA275245A
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Carbon monoxide production
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CA209503A
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Method of reducing ores
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CA305827A
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Method of treating solid materials with gases
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