AT68069B
(en )
1915-02-25
Process and device for the extraction of zinc oxide from zinc-containing slag from lead and copper smelting.
AT74038B
(en )
1917-11-26
Process for the separation of copper, lead and zinc from sulphidic or oxidic ores.
CH51987A
(en )
1911-10-16
Process for the reduction of iron ores essentially containing iron oxide
AU801313B
(en )
1913-09-02
Improved process for the treatment of sulphide ores, tailings and other residues, containing lead and zinc
AU34911B
(en )
1912-02-27
Apparatuses and processes for extracting metals from their ores
CH76338A
(en )
1917-12-01
Process for extracting zinc from zinc powder
FR483469A
(en )
1917-07-11
Method and apparatus for extracting zinc from zinciferous ores
AU461912A
(en )
1913-07-01
Processes for extracting metals from ores
AU549012B
(en )
1913-05-13
Apparatus for the recovery of precious metals
CH76337A
(en )
1917-12-01
Process for extracting zinc from zinc powder
AT69146B
(en )
1915-06-25
Device for the magnetic processing of ores.
AU366612A
(en )
1912-04-02
Improvements inthe extraction of metals from their ores
AU1165513B
(en )
1914-04-28
Process for extracting metals from low percentage ores
CH63847A
(en )
1914-02-16
Process for the electrowinning of alkali metals from molten alkali haloids
CH48335A
(en )
1910-10-01
Process for the precipitation of cellulose from copper oxide ammonia cellulose solutions
CH64278A
(en )
1914-03-16
Device for casting objects from precious metals
FR458149A
(en )
1913-10-03
Process for the extraction of metallic zinc from its ores
AU609312B
(en )
1913-09-02
Improved process for separating precious metals from their ores
FR460233A
(en )
1913-11-26
Improvement in the method of extracting zinc from ores, and particularly zinc and lead ore
CH48387A
(en )
1910-10-17
Electrometallurgical process for the extraction of zinc from mixed sulphide ores of zinc and lead
FR456800A
(en )
1913-09-04
Feeding device for roasting ovens
AU828813B
(en )
1913-12-02
Improved method of and apparatus for extracting metals of commercial value from their ores
CH45290A
(en )
1909-11-01
Process for increasing the shelf life of copper oxide ammonia solutions
FR441098A
(en )
1912-07-29
Method and device for the treatment of zinc ores
FR18856E
(en )
1914-07-27
Method and device for the treatment of zinc ores