Outotec Oyj

Outokumpu Technology Oy

Juha Järvi

Pekka Taskinen

Jens Nyberg

Maija-Leena Metsärinta

Tuija Suortti

Heikki Siirilä

The invention relates to a method for producing magnetically active shape memory metal alloy, said metal alloy containing nickel, manganese and gallium. In the method, the different components of the metal alloy are melted, and the melt is homogenized essentially at the melting temperature; the obtained metal alloy is cast, and the cast metal alloy is subjected to directional solidification at 10-100&#xb0; C. below the liquidus temperature of said metal alloy.

Method for producing magnetically active shape memory metal alloy

The present invention relates to method, which helps to reduce and remove the build-up forming on the grate of a fluidized-bed furnace in the roasting of fine-grained material such as concentrate. The concentrate is fed into the roaster from the wall of the furnace, and oxygen-containing gas is fed via gas nozzles under the grate in the bottom of the furnace in order to fluidize the concentrate and oxidize it during fluidization. Below the concentrate feed point, or feed grate, the oxygen content of the gas to be fed is raised compared with the oxygen content of the gas fed elsewhere.

Method for reducing build-up on a roasting furnace grate

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Ulvila, Finland

Juha Järvi