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Continuous sulphur drossing apparatus
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Patent number 4,073,481
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Issue date Feb 14, 1978
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The Broken Hill Associated Smelters Proprietary Limited
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Frank Lawson
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Process for debismuthizing lead
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Patent number 4,052,200
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Issue date Oct 4, 1977
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The Broken Hill Associated Smelters Proprietary Limited
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Denby Harcourt Ward
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Continuous sulphur drossing process
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Patent number 4,050,926
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Issue date Sep 27, 1977
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The Broken Hill Associated Smelters Proprietary Limited
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Frank Lawson
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Apparatus for debismuthising lead
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Patent number 4,042,228
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Issue date Aug 16, 1977
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The Broken Hill Associated Smelters Proprietary Limited
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Denby Harcourt Ward
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...