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procedures for the extraction of titankonzentraten by melting and reduction of titaneisenerz, especially such titaneisen which the iron in the form of oxides, primarily as eisenoxydul and ferrioxyd, is
procedures for the extraction of titankonzentraten by melting and reduction of titaneisenerz, especially such titaneisen which the iron in the form of oxides, primarily as eisenoxydul and ferrioxyd, is