|
GB564295A
|
|
Improvements in or relating to the purification of ferruginous sand
|
|
GB564338A
|
|
Improvements in or relating to the concentration of potassium compounds from crude minerals containing them
|
|
GB549975A
|
|
Improvements in or relating to froth flotation concentration of ores
|
|
ES146164A1
|
|
A process for the conversion of nitrous gases, especially from the combustion of ammonia, into nitric acid.
|
|
GB515937A
|
|
Improvements in or relating to the concentration of minerals by froth flotation
|
|
ES142504A1
|
|
An improved procedure to extract gold from minerals that contain it.
|
|
ES140542A1
|
|
Improvements in the construction of apparatus for the separation of minerals by flotation.
|
|
ES136763A1
|
|
A process of concentration of minerals by the method of flotation and others.
|
|
GB421890A
|
|
Improvements in or relating to the washing of coal
|
|
ES130615A1
|
|
Improvements in the concentration of minerals by the flotation method.
|
|
GB378063A
|
|
Improvements in or relating to the concentration of minerals by flotation
|
|
GB373667A
|
|
Improvements in or relating to the concentration of minerals by flotation
|
|
ES121394A1
|
|
Perfections in the concentration of minerals by the foamy flotation method.
|
|
GB363122A
|
|
Improvements in or relating to the froth flotation concentration of minerals
|
|
GB362366A
|
|
Improvements in or relating to concentration by froth flotation
|
|
GB349591A
|
|
Improvements in or relating to froth flotation concentration of minerals
|
|
GB348024A
|
|
Improvements in or relating to the heat treatment of copper ores or the like
|
|
ES114672A1
|
|
Improvements in the concentration of copper ores.
|
|
DE495949C
|
|
Process for improving the dewatering of foam swimming concentrates
|
|
DE493110C
|
|
Foam swimming machine
|
