|
US1144066A
|
|
Process and apparatus for removing drossy residues from vertical muffles in the extraction of zinc.
|
|
US1086939A
|
|
Muffle for reduction-furnaces.
|
|
GB191309314A
|
|
Improvements in or relating to Vertical Zinc Retorts.
|
|
US1152050A
|
|
Arrangement for preventing the formation of smoke in the production of zinc.
|
|
GB191306771A
|
|
Improvements in or relating to Plant for the Recovery of Zinc from Zinc Ores.
|
|
CA150598A
|
|
Process of removing the residues of ores
|
|
GB191300732A
|
|
Improvements in or relating to Apparatus for the Continuous Removal of the Residues from the Reduction of Zinc Ores in Vertical Retorts.
|
|
US1144065A
|
|
Mechanism for removing residues from vertical retorts.
|
|
CA297388A
|
|
Zinc reduction furnace
|
|
CA210360A
|
|
Zinc furnace
|
