Assignee
OUTOKUMPU ENG CONTRACT
FI13 patents
Top patents by PatentIndex Score
US5549854AAug 27, 1996
Method and apparatus for forming controlled vortexes and for recirculating gas
OUTOKUMPU ENG CONTRACT27 citations89
US5628817AMay 13, 1997
Method for leaching nickel-copper matte employing substantially neutral leaching solutions
OUTOKUMPU ENG CONTRACT41 citations88
US5662871ASep 2, 1997
Method for extracting metals from large solution flows and apparatus for realizing the same
OUTOKUMPU ENG CONTRACT41 citations85
US5362032ANov 8, 1994
Apparatus for feeding gases into a smelting furnace
OUTOKUMPU ENG CONTRACT37 citations81
US5358222AOct 25, 1994
Apparatus for oxidizing pulverous fuel with two gases having different oxygen contents
OUTOKUMPU ENG CONTRACT19 citations78
US5505434AApr 9, 1996
Method and apparatus for improving heat and dust recovery in a waste heat boiler
OUTOKUMPU ENG CONTRACT8 citations73
US5585079ADec 17, 1996
Method for leaching material containing zinc oxide and zinc silicate
OUTOKUMPU ENG CONTRACT17 citations72
US5772955AJun 30, 1998
Apparatus for suspension smelting
OUTOKUMPU ENG CONTRACT7 citations69
US5443620AAug 22, 1995
Method for oxidizing pulverous fuel with two gases having different oxygen contents
OUTOKUMPU ENG CONTRACT8 citations69
US5565016AOct 15, 1996
Method for suspension smelting
OUTOKUMPU ENG CONTRACT7 citations66
US5674310AOct 7, 1997
Method and apparatus for feeding reaction gas and solids
OUTOKUMPU ENG CONTRACT14 citations59
US5574956ANov 12, 1996
Method and apparatus for treatment sulphidic concentrates
OUTOKUMPU ENG CONTRACT2 citations59
US5492554AFeb 20, 1996
Method for producing high-grade nickel matte from at least partly pyrometallurgically refined nickel-bearing raw materials
OUTOKUMPU ENG CONTRACT6 citations58