Slag
Slag
Was ist Slag
Slag ist ein Nebenprodukt, das sich bei der Erzeugung von Stahl bildet. Der Begriff stammt aus dem Mittelalter und war ursprünglich ein Wort für abgeschlagene oder abfallende Stücke.
Entstehung von Slag
Slag entsteht in der Hochöfen während des Stahlerzeugungsprozesses. Zuerst wird Erz in den Hochofen gegeben. Dann kommt Koks dazu, ein Brennstoff mit hohem Kohlenstoffgehalt. Durch die Hitze des Koks schmilzt das Erz. Dabei trennen sich die Metalle von den Nicht-Metallen. Der Schmelzprozess führt zu zwei unterschiedlichen Produkten: flüssigem Stahl und Slag.
Eigenschaften von Slag
Slag ist eine glasartige Substanz. Er besteht hauptsächlich aus Silikaten, Oxiden von Calcium, Magnesium und Aluminium. In seiner noch flüssigen Form schwimmt er auf dem geschmolzenen Stahl. Das liegt daran, dass er leichter als der Stahl ist. Nach dem Abkühlen wird er zu einer dichten, festen Masse.
Verwendung von Slag
Slag hat viele verschiedene Anwendungen. Man kann ihn in der Bauindustrie verwenden. Dort eignet er sich gut als Zuschlagstoff für Beton. Weil Slag stark wasserabweisend ist, sorgt er dafür, dass der Beton weniger Wasser aufnimmt. Das macht den Beton widerstandsfähiger gegen Frost und Tauwetter. Aber auch im Straßenbau findet Slag Anwendung. Dort dient er als Untergrund für Straßen und Schienen. Zudem kann man Slag in der Landwirtschaft benutzen. Dort kann er als Dünger verwendet werden, um den pH-Wert im Boden zu verbessern.
Zusammenfassung
Auch wenn der Name Slag negativ klingt, ist er ein wichtiger Teil der Stahlproduktion. Ohne ihn könnte der Stahl nicht auf reine Weise hergestellt werden. Zudem hat Slag viele nützliche Eigenschaften. Vor allem in der Bau- und Landwirtschaft findet er vielseitige Anwendung.
Blog Posts with the term: Slag
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