Preventing an increase of the nitrogen content in molten steel
AssigneeMannesmann Aktiengesellschaft
InventorsHans Gruner, Arnold Pfeiffer, Heinrich-Wilhelm Rommerswinkel, Rolf Vest
Life of this patent
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Abstract
Following the discharge of steel from a steel producing converter, the adding and inclusion of nitrogen is impeded by surrounding the stream of pouring steel with a layer of limestone at a grain size not exceeding 5 mm. Practice has shown that the nitrogen content can well remain below a content of 0.005%.
Claims7
Method fo preventing the inclusion of nitrogen in molten steel which is treated following a poured discharge from a converter, comprising the steps of protectively enveloping a stream of steel as poured from the converter, with a fine grain material yielding carbon dioxide, the enveloping material reaching a vessel into which the steel is poured simultaneously therewith.
Dependencies are inferred from the claim text.