Other

Outokumpu Oy

Outokumou Oy

Jaakko O Leppinen

Jussi K Rastas

Kaarlo M Saari

Alexander Lashkul

Vaino V Hintikka

Aimo E Jarvinen

Vladimir E Nenno

Jussi K Poijarvi

Aimo M Kuivala

Stig V Bjorklof

An apparatus for separation of solids in froth is presented. The apparatus includes: a housing ( ), establishing a chamber ( ) for flows of liquid and solid material and a froth bed ( ) on the liquid; feeding means ( ) for getting incoming material to be separated in contact with said froth bed ( ); discharging means ( ) for solid material near the bottom ( ) of said housing ( ); aerator means ( ) under the liquid surface ( ) for creating bubbles and thus forming said bed of froth ( ) and generating movement on the bed of froth ( ); means for discharging froth from the housing ( ) including at least a froth outlet ( ). The apparatus is characterized by a surface ( ) connected to said feeding means ( ) so as to reduce the vertical speed component of the material being fed with the feeding means ( ) from above said froth bed in and on to said froth bed ( ).

Apparatus for separation of solids in froth

Mercury is removed from sulfuric acid-bearing hot and moist smelting-plant or roasting-plant gases by cooling and scrubbing the hot gases by means of a concentrated sulfuric acid mist in order to sulfatize the mercury and to separate it from the gases. The cooling is carried out by vaporizing so much water or dilute sulfuric acid solution from the gases that the temperature of the gas drops to below the dew point, in order to produce a sulfuric acid mist which sulfatizes and washes the mercury, the gases being separated from the mist and directed to the sulfuric acid plant. The process can be carried out by means of nozzles installed in the pipe which feeds hot and moist sulfuric acid-bearing gases into the scrubbing tower of the sulfuric acid plant, water or acid obtained from the scrubbing tower being fed through the nozzles into the feed pipe in the form of a finely-divided mist.

Process and apparatus for the removal of mercury from sulfur

A process is disclosed for the recovery of lead, silver and gold from the iron-bearing residue of an electrolytic zinc process by froth-flotating a slurry of the iron-bearing residue in the presence of a sulfidic collector agent in order to froth-flotate the sulfides and to separate them from the iron-bearing residue. The iron-bearing residue is sulfidized selectively in order to convert the lead, silver and possibly gold substantially quantitatively to sulfides before the iron-bearing residue is froth-flotated.

Flotation recovery of lead, silver and gold as sulfides from

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Vammala, Finland

Jaakko O Leppinen