Abstract: An arrangement for treating solids settled on the bottom of an electrolytic tank. Said arrangement comprises a collector element movable essentially along the bottom of the electrolytic tank or in the vicinity thereof, said collector element being provided with means for separating coarse particles from the rest of the solids.

Abstract: A method for plugging a hole, particularly a hole provided in a cooling element, in which method a hole formed in a piece essentially made of mainly copper, for instance in the housing element of a cooling element, there is arranged a plug mainly made of copper. Between the side surface of the plug and the inner surface of the hole, there is arranged brazing agent with a melting temperature lower than that of the pieces to be joined together, and the junction area between the plug and the piece, such as the housing element of the cooling element, is heated at least up to the melting temperature of the brazing agent or to the vicinity thereof, whereafter the junction area is cooled. The invention also relates to a cooling element manufactured according to said method.

Abstract: The invention relates to a method for the precipitation of nickel from an aqueous solution containing its sulphate as a metallic powder suitable as an alloying element for refined steel. In this method, nickel reduction takes place continuously in one or several autoclaves at a temperature of 80-180° C. and hydrogen pressure of 1-20 bar, whereby the production capacity can be raised significantly, compared to batch processes made in correspondingly dimensioned devices or equipment.

Abstract: The invention relates to a flotation machine and method for improving flotation effect in the flotation machine which is provided with members for feeding material to be treated in the flotation machine, members for removing the treated material out of the flotation machine at least in the upper part of the flotation machine and in the bottom part of the flotation machine, a mixing mechanism comprising a stator and a rotor located inside the machine, air supply means for supplying air to the mixing mechanism and forming a froth bed in the upper part of the flotation machine, at least one member for adjusting free space of the froth bed created in the flotation machine. According to the invention a conducting member is installed inside the flotation machine in order to add flowing material for slurry dilution in the slurry area essentially above the top art of the rotor, but below the froth zone.

Abstract: The invention relates to a method for extracting copper in liquid-liquid solvent extraction from aqueous solutions with a high sulphate content, by raising the viscosity of the extraction solution and by dispersing the aqueous solution into drops, achieving a dense drop aggregation. The viscosity of the extraction solution may be raised either by increasing the content of the actual extractant, the extraction reagent, in the extraction solution or by using a diluting agent with a higher viscosity than that of the diluting agent normally used. By raising the viscosity of the extraction solution the mixing durability of the extraction dispersion can be increased and resulting of that the amount of residual drops is decreased. Other advantages are that the extraction solution flow of the extraction process decreases in relation to the flow of the aqueous solution acting as the copper source and that the size of the extraction equipment needed is reduced.

Abstract: The invention relates to a method for the precipitation of nickel from its aqueous solution as a metal powder using hydrogen. The aqueous solution containing nickel compounds is neutralised first with an earth alkali or alkali compound so the nickel precipitates as nickel hydroxide or as an alkaline salt, after which reduction is performed in the presence of a catalyst in ion form in atmospheric or close to atmospheric conditions preferably as a continuous process.

Abstract: A conveyor belt for a continuously operated conveyor-type thermal treatment of a material bed includes metal conveyor belt elements that are connected to each other. Each conveyor belt element is formed with perforations in order to allow gas to flow through the conveyor belt. The perforations are distributed non-uniformly over the conveyor belt element and are located in at least two perforation zones. The perforation zones are separated from each other by perforation-free zones.

Abstract: An apparatus for clearing dust accretions in connection with a smelting furnace, particularly in the contact area between the uptake shaft and waste heat boiler of a flash smelting furnace. The apparatus comprises a wall element (1) arranged in the area (8) to be cleaned, which wall element is movable between at least two positions.

Abstract: The invention relates to an apparatus for the heating of flowing material containing finely divided solids, such as concentrate slurry containing precious metals and/or precious minerals, up to a desired temperature range, for instance the temperature range applied in a treatment process of said material, said apparatus comprising means for feeding and removing the medium used for heating as well as means for feeding and removing the material to be heated in and out of the apparatus. According to the invention, both the flowing space of the material to be heated and the flow channels (3) of the heating medium are installed in an essentially vertical position, so that the material to be heated can be fed to the bottom part of the flowing space, and the heating medium can be fed to the top part of the flow channels (3), and that in the feed chamber (5) of the material to be heated, there are installed means (9) for cleaning the feed chamber (5).

Abstract: The invention relates to an apparatus for supporting material to be treated in continuously operated thermal treatment furnaces, wherein the support of the material is carried out by means of support elements external to the furnace, and where the material is made to proceed at a high velocity, said apparatus comprising at least two elements for supporting the material and a member for supporting the support element, as well as means for cooling the support element. According to the invention, the support element comprises at least one rotation support member provided with a turnably installed tightening element, and at least one actuator arrangement for making the support element rotate essentially at an equal circumferential velocity as the proceeding direction of the material.

Abstract: The invention relates to a coil to be used in transverse flux induction heating of an object in the form of a metal strip or another elongate metal workpiece. The coil contains at least one pair of loops of conductors, which are non-symmetrically positioned to each other and the conductors overlap each other so that the inductor has double conductors across the object to be heated and a single conductor parallel to the object to be heated at the edges. The heating effect is prevented alone in the conductors by dividing the induced current for the conductors to two equal branches each having the same width as the original current and the combined heating effect in the branches is only half of the heating effect before branching.

Abstract: The invention relates to a transverse conveyor for electrodes used in the production of metals. This transverse conveyor consists of a transfer device, located below the electrodes to be transferred and which device moves back and forth on a horizontal plane, as well as of lifters used for lifting the electrodes. The transfer device consists of a frame, on which there is a moving transfer bar, which is designed to cover the frame at all stages of its movement.

Abstract: An arrangement for cleaning the bottom of an electrolytic tank of solids settled on the bottom of the tank, said arrangement comprising elements to be moved along the bottom or at least in the vicinity thereof in order to detach solids from the bottom. The arrangement comprises at least one moveable suction element, whereby at least part of the solids accumulated on the bottom is conducted out of the tank.

Abstract: A process of continuously conveying granular solids from a first zone with a pressure of 4 to 16 bar through a descending line and via an ascending line to a second zone with a pressure which is lower than in the first zone by 3 to 15 bar, by means of a gaseous medium. To ensure that the pressure between two regions can be reduced at low cost and with little maintenance effort when continuously conveying granular solids, a gaseous medium is injected into a tube through an upwardly directed nozzle at the point where the granular solids are conveyed through a descending line into an ascending line.

Abstract: A roller head for a planetary rolling arrangement, said roller head comprising a housing, inside which housing there is rotatably arranged a hollow outer axis and means for rotating said outer axis, as well as inside said outer axis, in a manner that transmits the rotary motion thereof, a center axis which is movable in the axial direction and can be locked in the axial direction, said center axis being provided with a roller. The roller head is characterized by an adjusting axis which is rotatably arranged at the end of the outer axis that is located on the opposite side with respect to the roller and is essentially locked in the axial direction said adjusting axis comprising a counterpart for the threaded section provided in the center axis, and said adjusting axis also including a locking member, which in the locking position forms a friction coupling at least between the adjusting axis and the outer axis.

Abstract: The invention relates to a method for the manufacture of a composite cooling element for the melt zone of a metallurgical reactor, whereby the element is manufactured by attaching ceramic lining sections to each other by copper casting and forming at the same time a copper plate equipped with cooling water channels behind the lining. The invention also relates to composite cooling elements manufactured by this method.

Abstract: The invention relates to a method of regulating a roasting furnace in fluidized bed roasting. Part of the roasting furnace grate is separated off into a separate grate section, known as the overflow grate, where the nozzles and the amount of roasting gas blown through them can be regulated independently of the main grate. It is advantageous to position the separately regulated grate in the section of the furnace where the overflow aperture is located.

Abstract: The invention relates to a device to be used in processing of a surface of metal object to be processed which surface is essentially continuously in onwards motion. According to the invention a processing agent (1) is to be directed to the surface (5) to be processed by nozzles (6) in at least one position so that at most 70 per cent of the surface (5) to be processed is under processing in one position of directing processing agent (1).

Abstract: This invention relates to a device for producing copper or copper based metal objects in a continuously operated extrusion device, where the material to be extruded is brought to the extrusion member in a groove formed on the circumference of a feed member made to rotate. According to the invention, in the groove (3,10) of said feed member, coated with a metal coating (8,11), the ratio of the groove width to the groove height is within the range 0.5-2.0.

Abstract: The invention relates to a device for at least partly removing a deposit created in the electrolytic refining or electrowinning of metal from the surface of the mother plate used as an electrode in the refining or electrowinning process, said device comprising at least one member for removing the deposit and at least one member for controlling the removal member with respect to the deposit to be removed. According to the invention, the device comprises at least one gripping element that is used for creating a mechanical contact between the deposit and the removal member, said gripping element being connected to a control member, to which there are coupled both the shaft part of the gripping element and the deposit removal member.