Outotec (finland) Oy

Outotec Oyj

Tom Rönnberg

Janne Ollila

Seppo Juvonen

Ari Ceder

Stefan Hajek

Jarmo Jokinen

Ilpo Loikkanen

An electrode slipping device comprises an upper holder and a lower holder, both holders containing one or more clamping shoes and one or more clamping cylinders in co-operation with the clamping shoes. The clamping shoes are operable between a position where the electrode is clamped and a position where the electrode is unclamped. The clamping cylinder is connected to the electrode holder by first fastening means and to the clamping shoe by second fastening means such that the clamping cylinder can be released from engagement with the holder by unlocking both sets of fastening means.

Clamping cylinder for an electrode slipping device

Provided is an arrangement for cooling channels in an electrode column assembly of an electric arc furnace, wherein the lower part of the electrode column assembly is provided with a contact shoe ring formed of a plurality of contact shoe elements, a pressure ring formed of a plurality of pressure blocks, and a heat shield located above the pressure ring and formed of a plurality of heat shield segments. The contact shoe elements and/or the pressure blocks are provided with channels for a cooling liquid to flow therein. The channels made in the material of the contact shoe elements and/or the pressure blocks extend obliquely downwards from the upper ends of said contact shoe elements and/or the pressure blocks near to the lower ends of the same. At least two of said oblique channels join together at their lower ends to form a continuous channel.

Arrangement for cooling channels in an electrode system

The invention relates to a demister () configured for installation to a wet-type gas scrubber (). The wet-type gas scrubber () comprises a wet-scrubbing phase () and a liquid separation phase (). The liquid separation phase () includes a liquid collecting tank () and a cyclonic droplet separation tower () attached on the liquid collecting tank for receiving a gas stream therefrom. The demister () comprises a mist eliminator unit (A) for removal of liquid droplets in a gas stream. The invention also relates to a method of modifying an existing wet-type gas scrubber () by including the demister (). The invention further relates to a wet-type gas scrubber () comprising the demister (). The demister () is a separate integral unit adapted to be removably attachable between the liquid collecting tank () and the cyclonic droplet separation tower ().

Demister, method of modifying an existing wet-type gas scrubber and wet-type gas scrubber

A method and a system for monitoring clamping pressure exerted by a clamping cylinder to an electrode in an electrode slipping device which comprises an upper annular holder ring and a lower annular holder ring, each comprising at least one clamping assembly including a clamping shoe and clamping cylinder arranged in co-operation so that the clamping shoe is forced into pressure contact with the electrode and released from pressure contact with the electrode by the action of the clamping cylinder. The measuring system comprises a force sensor () mounted in connection with a pressing piece () that transmits the force created by the clamping cylinder to the clamping shoe. The force sensor can be a strain gage () mounted in a cavity () provided in the pressing piece () or a load cell mounted between the pressing piece () and the clamping cylinder.

Method and system for measuring clamping pressure in an electrode slipping device

In a sealing device () for sealing the through hole of an electrode, the pressurizing medium that generates the pressure of mechanical sealings against a rod electrode structure is an inert gas, such as nitrogen. The means for pressing the created sealing ring () against the rod electrode structure () include a gas distribution chamber () surrounding the sealing ring (); a first channel () that is arranged to provide a flow path for the inert gas in between the hose () and the gas distribution chamber (); an annular groove () in the sealing surface () of the sealing ring (); and a second channel (), which is placed in the sealing ring () and is arranged to provide a flow path for the gas from the gas distribution chamber to the groove () for extruding the gas in between the sealing surface () and the rod electrode structure ().

Sealing device

A method and arrangement for removing solid particles and tar component from carbon monoxide gas. In the method, carbon monoxide gas is conducted from a ferroalloy smelting furnace () to a gas scrubber (), the carbon monoxide gas is scrubbed in the gas scrubber () by a liquid medium for removing part of the solid particles, the carbon monoxide gas is conducted from the gas scrubber to a blower (), the flow rate of the carbon monoxide gas is increased by the blower (), and the carbon monoxide gas is conducted to a particulate filter () and the remaining solid particles are essentially filtered in the particulate filter () from the carbon monoxide gas. Prior to conducting the carbon monoxide gas to the particulate filter (), it is conducted to a particle feeder (), where finely divided adsorbent particles (A) are fed in the carbon monoxide gas for adhering the tar component on the surface of the adsorbent particles, and the carbon monoxide gas flow containing adsorbent particles is conducted to the particulate filter (), in which case the tar component adhered on the adsorbent particles is discharged in the particulate filter ().

Method and arrangement for removing solid particles and tar component from carbon monoxide gas

A distributor device including a distribution chute that extends inside the tank at an inclined angle for distributing material in the interior of the tank. A rotation frame is rotatable around a vertical central rotation axis (L) and includes a vertical inlet channel extending to the interior of the tank. A circular support frame is horizontally attached to the rotation frame, concentrically in relation to the vertical central rotation axis. A number of support rollers are connected to the tank and the axes of the support rollers are positioned radially with respect to the central rotation axis (L). At least one of the support rollers is as a support roller driving the rotation frame, which support roller the actuator is arranged to rotate. The distributor device includes a counterweight attached to the rotation frame, on the opposite side of the central rotation axis (L) in relation to the distribution chute.

Growing community of inventors

Espoo, Finland

Tom Rönnberg