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GB294198A
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Improvements in and relating to apparatuses used for carrying out reactions between a solid and a gaseous body by means of drawn or blown blast
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GB294197A
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Improvements in and relating to apparatus for roasting and/or sintering ores and the like
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DE487206C
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Sealing device for a roasting or agglomerating plant with a movable grate that works with pressure or negative pressure
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DE484288C
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Preparation of fine zinc-containing material for dead rust sintering
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GB284248A
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Improvements in the roasting and/or sintering of fine ore or other fine material
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GB279697A
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Improvements in the reduction of zinc ores or other zinc bearing materials
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US1563616A
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Process and apparatus for roasting ores
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