|
DE1202504B
|
|
Process for the extraction of zinc
|
|
DE940856C
|
|
Grate for fluidized bed ovens
|
|
DE962750C
|
|
Process for sintering fine ores on blown or suction grates
|
|
DE860996C
|
|
Process and flame furnace for melting metals and metal alloys
|
|
DE709569C
|
|
Process for the electrolytic extraction of tin from tinned waste material, in particular tinplate waste
|
|
DE636844C
|
|
Process for the extraction of cadmium
|
|
DE596477C
|
|
Process for the extraction of tin, lead, antimony or bismuth or alloys of these metals from oxidic or oxidic material
|
|
DE651529C
|
|
Process for the extraction of zinc
|
|
DE590505C
|
|
Process for the extraction of lead, antimony or bismuth
|
|
DE589738C
|
|
Process for the extraction of lead, antimony or bismuth
|
|
DE587458C
|
|
Process for the extraction of metals such as tin, lead, antimony, bismuth or their alloys from sulphidic ores or hut products
|
|
DE585628C
|
|
Process for the extraction of tin, lead, antimony, bismuth and similar metals from starting materials containing tin oxide
|
|
DE546978C
|
|
Process for the extraction of tin
|
|
DE560919C
|
|
Process for the extraction of refined tin or tin alloys
|
|
DE553662C
|
|
Process for the extraction of tin
|
|
DE601499C
|
|
Process for the machine production of templates for zinc reduction ovens and similar hollow bodies
|
|
DE570143C
|
|
Sintering pan
|
|
DE556826C
|
|
Preparation of zinc blende and similar ores that are difficult to rust, especially mud ores, for the rusting
|
|
DE572253C
|
|
Process for the reduction of fine-grained material containing tin oxide
|
|
DE494152C
|
|
Arch support for round Dwight Lloyd apparatus
|
