Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B21/00—Nitrogen; Compounds thereof
C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
C01B21/072—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with aluminium
C01B21/0726—Preparation by carboreductive nitridation
Verfahren zur Erzeugung von Eisen oder Eisenlegierungen oder aehnlichen schwerschmelzbaren Metallen durch Reduktion von Eisenerzen o. dgl. im chargenweise betriebenen Trommelofen
Schachtofen zum Brennen von Zement, Magnesit, Dolomit u. dgl. sowie zum Agglomerieren von Erzen mit gegeneinander versetztem Vorwaerm- und Kuehlschacht und im Brennraum liegender Foerdereinrichtung