CH48387A
(en )
1910-10-17
Electrometallurgical process for the extraction of zinc from mixed sulphide ores of zinc and lead
FR415639A
(en )
1910-09-30
Process for the extraction of lead and zinc from mixed minerals
FR444809A
(en )
1912-10-26
Process and devices for smelting and refining metals
FR379578A
(en )
1907-11-12
Process for the extraction of copper and lead from strongly basic ores
FR367368A
(en )
1906-10-27
Furnace for the extraction of zinc from its ores
FR440712A
(en )
1912-07-19
Process for the extraction of copper from sulphide ores, and other materials
FR403048A
(en )
1909-10-23
Process and devices for extracting zinc from ores
FR431280A
(en )
1911-11-07
Process and apparatus for treating sulphide ores to remove sulfur therefrom and for the manufacture of sublimated white lead and zinc oxide
FR430821A
(en )
1911-10-25
Process for the treatment of mixed lead and zinc ores
FR15042E
(en )
1912-04-11
Process for the treatment of mixed lead and zinc ores
AU433205B
(en )
1906-03-27
Improvement inthe process of extracting' zinc or oxide of zinc from its ores
FR370803A
(en )
1907-02-20
Process for the electrolytic extraction of zinc from its ores
FR421910A
(en )
1911-03-08
Method and apparatus (rotary kiln) for the extraction of lead and zinc from their ores and slag
GB190526790A
(en )
1906-12-13
Improved Process for the Treatment of Complex Sulphide Ores
FR428521A
(en )
1911-09-01
Process and devices for the extraction of metals from their ores
CH73001A
(en )
1916-08-01
Process and installation for the extraction of pure zinc from its ores
AU286205B
(en )
1905-09-26
Process of desulphurising' lead ores
FR403033A
(en )
1909-10-23
Advanced process for separating and refining metals
GB190801761A
(en )
1909-01-14
An improved Continuous Process and Apparatus for the Extraction of Zinc from its Sulphide
CA102987A
(en )
1907-01-08
Method of smelting sulphide ore
FR458149A
(en )
1913-10-03
Process for the extraction of metallic zinc from its ores
AU750706A
(en )
1907-06-18
Improved process of treating zinc and lead sulphide ores
AU1370709B
(en )
1909-06-15
Treatment of zinc ores bythe precipitation process
CA112792A
(en )
1908-07-07
Process of smelting sulphide ores
FR430236A
(en )
1911-10-11
Process for the perfect roasting of zinc ore and other sulphide ores