Procedure for producing lead bullion from sulphide concentrate
Procedure for roasting seleniferous material
Procedure for the preparation of refined materials containing Si
Procedure for the purification and recovery of mercury in metall
Proces for the production of rare earth metals and alloys
Process and a plant for the direct reduction of iron oxide parti
Process and an apparatus for producing metals and metal alloys
Process and an apparatus for removal of silicon, manganese, carb
Process and an arrangement for the production of steel from spon
Process and apparatus for a direct formation of molten iron
Process and apparatus for a direct reduction of iron oxide conta
Process and apparatus for absorption of zinc vapour in molten le
Process and apparatus for adding particulate solid material...
Process and apparatus for adding particulate solid material...
Process and apparatus for at least temporarily simultaneously su
Process and apparatus for automatically controlling slag...
Process and apparatus for automating a vacuum degasification cyc
Process and apparatus for continuous converting of copper and no
Process and apparatus for continuously reducing and melting meta
Process and apparatus for extraction of metal values from metal