CH68854A
(en )
1915-05-01
Ore roasting process and oven for its realization
FR469820A
(en )
1914-08-12
Mechanical oven for roasting ores
FR442472A
(en )
1912-09-02
Oven for roasting ores
FR449186A
(en )
1913-02-19
Oven for roasting ores
FR451163A
(en )
1913-04-12
Oven for roasting ores
FR453808A
(en )
1913-06-17
Oven for roasting ores
FR519964A
(en )
1921-06-18
Process and oven for the chlorinating roasting of roasted pyrites
CH75678A
(en )
1917-09-01
Process and furnace for the refining of volatile metals
FR451442A
(en )
1913-04-18
Blast furnace crucible
FR466991A
(en )
1914-05-29
Ore roasting furnace
FR485187A
(en )
1917-12-19
Improvements to furnaces for roasting ores
FR511072A
(en )
1920-12-16
Metal ore concentration process
FR481230A
(en )
1916-11-14
Refractory lining for furnaces
FR439874A
(en )
1912-06-26
Improvements to the grinding and distribution units of mechanical furnaces for roasting ores
FR430808A
(en )
1911-10-25
Loader-unloader for metallurgical furnaces
FR475699A
(en )
1915-06-07
Process for the regeneration of rubble and platras
FR481476A
(en )
1916-12-08
Furnace for metallurgical and other operations
FR492465A
(en )
1919-07-09
Continuous furnace for reheating slugs of similar shape and size
FR493939A
(en )
1919-08-26
Metal separation and refining process
FR488645A
(en )
1918-10-23
Process for the treatment of ores
AU1426614B
(en )
1914-10-27
An improved ore reducing furnace
AU169811B
(en )
1911-09-12
Improvements in muffled roasting furnaces
CA87768A
(en )
1904-06-14
Ore roasting furnace
CA89575A
(en )
1904-10-11
Ore roasting furnace
CA107117A
(en )
1907-08-20
Ore roasting furnace