| 5574956 |
Method and apparatus for treatment sulphidic concentrates |
— |
1996-11-12 |
| 5445667 |
Method for reducing material containing metal oxide in solid phase |
— |
1995-08-29 |
| 5254320 |
Method for roasting sulphide ores |
— |
1993-10-19 |
| 5192487 |
Apparatus for treating zinc concentrates |
Stig A. Petersson |
1993-03-09 |
| 5141720 |
Catalyst bed for exothermal reactions between gases and/or other fluids |
Stig A. Petersson |
1992-08-25 |
| 5131944 |
Method and apparatus for treating zinc concentrates |
Stig A. Petersson |
1992-07-21 |
| 5029556 |
Method of recovering heat from hot process gases |
Pekka Ritakallio |
1991-07-09 |
| 5013355 |
Method and apparatus for producing matte and/or metal |
Hans I. Elvander |
1991-05-07 |
| 4976776 |
Method for reduction of material containing metal oxide using a fluidized bed reactor and flame chamber |
Hans I. Elvander |
1990-12-11 |
| 4578254 |
Process for the refining of sulfidic concentrates which contain arsenic, antimony and bismuth |
— |
1986-03-25 |
| 4478394 |
Apparatus for the separation of lead from a sulfidic concentrate |
Olavi A. Aaltonen, Esko O. Nermes, Tapio K. Tuominen |
1984-10-23 |
| 4391632 |
Process for the separation of lead from a sulfidic concentrate |
Olavi A. Aaltonen, Esko O. Nermes, Tapio K. Tuominen |
1983-07-05 |