Abstract: A method for providing a suspension smelting furnace with constant and continuous feed is disclosed. The method employs intermediate storage bins for fine-grained feed, a feed rate controller for accurately controlling the feed rate of the fine-grained material, and a pneumatic conveyor for lifting the feed up to the top level of the suspension smelting furnace where the burner of the furnace is adapted. The heavy constructions of the storage bins are located close to the ground level and the constructions around and on top of the furnace have been designed essentially lighter than in conventional solutions.

Abstract: The invention relates to a method for smelting non-ferrous metal sulfides (13) in a suspension smelting furnace and to a suspension smelting furnace. The suspension smelting furnace comprises at least one injection means (18) for injecting at least one of fluid (19) and pulverous matter (20) into a settler (2) of the suspension smelting furnace from at least one of a first side wall structure (8) and a second side wall structure (9) of the settler (2) so that fluid (19) and/or pulverous matter (20) is injected into the settler (2) above a top surface (16) of a layer of melt (15) in the settler (2).

Abstract: The invention suggests a filter device having a stationary head piece and a movable end piece, a pack of at least a recess plate and an adjacent recess plate between the head piece and the end piece, the recess plate and/or the adjacent recess plate having a recess, that forms a filter chamber between the recess plate and the adjacent recess plate, a first filter cloth and a second filter cloth between the recess plate and the adjacent recess plate for retaining as a filter cake a solid content of a suspension, and allowing a remaining liquid fraction of the suspension to pass as a filtrate, and a suspension pipe running through the pack between the head piece and the end piece for charging the suspension through the filling shoe between the first filter cloth and the second filter cloth into the filter chamber, and a filling shoe comprising an outlet section for the suspension, clamping the first filter cloth to the recess plate during filtering operation of the filter device, an anchoring section for anchor

Abstract: The invention relates to a turbine-type high-power impeller, to be used for mixing slurry in hydrometallurgical process reactors. The impeller is formed of at least five blades, each of which blades comprises a front edge, trailing edge, root and tip; the roots of the impeller blades are permanently attached by a joint to the hub or axis of the impeller, so that the front edge of the impeller blade is straight, and the trailing edge is chamfered, in which case the blade is narrowed towards the tip, and the blade is provided with two longitudinal folds arranged in parallel with the front edge of the blade.

Abstract: A radial-flow scrubber (1, 100) for separating dust and pollutants from gases, comprises a housing (2), a raw gas inlet (3), a feeder (4) for a washing liquid, a washing zone (5), a clean gas outlet (10), and an outlet (11) for the washing liquid. The washing zone (5, 101) comprises an inlet funnel (7, 105), a scrubbing zone (18) having an adjustable flow cross-section, and a drive (10, 110) for adjusting the cross section of the scrubbing zone (18), as well as a tubular shell (8,108) detachably mounted to the housing (2), wherein in a ceiling of the housing (2) an opening is provided through which the complete washing zone (5, 101) can be integrally withdrawn.

Abstract: A method and an apparatus for taking slurry samples from a continuous gravity process flow (PF). The sampling is carried out in two stages by first and second sampling units (1, 2). The primary sample flow (PSF) and the secondary sample flow (SSF) are arranged as pressureless open-channel type flows, so that the flow rate of the secondary sample flow (SSF) to be led for analysis is approximately proportional to an instantaneous flow rate of the process flow (PF).

Abstract: The invention relates to a blade (4) of an axial flow impeller (1). Dimensioning rules for the blade (4) are presented: A=0.2R; B=0.2Wb; C=0.2R; D=0.2Wb; E=0.5R; F=(0.1 . . . 0.2)R; G=0.2Wb; H=0.25R; I=0.1R; J=0.4R; K=0.1Wb. The first angle ?1=6°±1°, the second angle ?2=8°±1° and the third angle ?3=19° to 25°. R is the lengthwise dimension from the axis of rotation (x) of the impeller to the tip (7) of the blade (4). Width Wb is the widthwise dimension of the blade perpendicularly to the lengthwise direction. The invention also relates to an axial flow impeller (1) having said blades (4).

Abstract: The invention relates to an arrangement for feeding fine-grained matter to a concentrate or matte burner (1) of a suspension smelting furnace (2). The arrangement includes a screw conveyor (3) comprising a tube means (4) having an inlet opening (6), an downward-facing outlet opening (7), and a helical screw (8) for moving fine-grained matter from the inlet opening (6) to the downward-facing outlet opening (7). The downward-facing outlet opening (7) is provided with a distribution means (10). The distribution means (10) has a free end (11) configured for feeding fine-grained matter into the downward-facing outlet opening (7). The helical screw (8) of the screw conveyor (3) extends from the direction of the inlet opening (6) at least partly over the downward-facing outlet opening (7).

Abstract: The invention relates to a method and to an arrangement for feeding fine-grained matter to a concentrate or matte burner (1) of a suspension smelting furnace (2). The arrangement comprising a fluidization arrangement (3) for feeding fluidized fine-grained matter into a dosing bin (4), and a conveyor means (6) for feeding fluidized fine-grained matter from the dosing bin (4) to the concentrate or matte burner (1) of the suspension smelting furnace (2), and a loss-in-weight controller (5) between the dosing bin (4) and the conveyor means (6). The arrangement comprises an impact cone (8) arranged below a filling valve (7) between the fluidization arrangement (3) and the dosing bin (4) for distributing fluidized fine-grained matter flowing from the fluidization arrangement (3) within the dosing bin (4).

Abstract: A solvent extraction method for hydrometallurgical liquid-liquid extraction processes, in which method solution phases are separated from a dispersion while the dispersion flows horizontally in a settler from a feed end to a discharge end. The mass flow of the dispersion and solution phases is divided into a plurality of parallel and mutually separated plug flows flowing in the settler from the feed end to the discharge end. The settler (1) comprises a plurality of elongated settler sections (4) which are mutually separated and side by side in parallel to each other, Inc settler sections (4) extending from the feed end (2) to the discharge end (3), forming a plurality of mutually separated parallel plug flow channels.

Abstract: This invention relates to a machine for the thermal treatment of bulk material, in particular a sintering or pelletizing machine, comprising a travelling grate (4) with a plurality of pallet cars (3), that are conveyed through at least one treatment station for effecting the thermal treatment of the bulk material, and a sealing structure sealing the pallet cars (3) against the machine, wherein the sealing structure comprises a spring-loaded sealing strip (15) contacting a planar sealing surface (16, 20). It is provided that the sealing strip (15) is held by a leaf-spring element (13) biasing the sealing strip (15) against the sealing surface (16, 20).

Abstract: The invention relates to a method and to an arrangement for feeding fine-grained matter to a concentrate burner (1) or a matte burner of a suspension smelting furnace (2). The invention relates also to a controlling means for controlling feeding of fine-grained matter to a concentrate burner (1) or a matte burner of a suspension smelting furnace (2) in an arrangement for feeding fine-grained matter to a concentrate burner (1) or a matte burner of a suspension smelting furnace (2). The invention relates also to controlling means for controlling feeding of fine-grained matter to a concentrate burner (1) or a matte burner of a suspension smelting furnace (2) in an arrangement for feeding fine-grained matter to a concentrate burner (1) or a matte burner of a suspension smelting furnace (2) and to a computer program product.

Abstract: A separator for separating solid particles from a vapor-gas mixture includes a dust chamber with a main body having an inlet for a vapor-gas mixture containing semi-coke particles and an outlet chute in a bottom of the main body for removal of semi-coke particles. The main body is covered with an external insulation. The separator also includes a cyclone, wherein an upper part of the main body is connected to an inlet of the cyclone for removal of fine semi-coke particles from the vapor-gas mixture. A screw conveyor unit is connected to a bottom part of the main body.

Abstract: A process for producing hydrogen for use in a subsequent methanation process includes electrochemically converting water into hydrogen and oxygen. The hydrogen is depleted with electrolyte aerosols. Then, the electrolyte aerosols are separated from the depleted hydrogen in a wet electrostatic precipitator in a hydrogen atmosphere.

Abstract: A process for operating a fuel fired reactor includes introducing fuel into the reactor and burning the fuel in the reactor by means of at least one main burner. Relevant parameters of the process are monitored. Within a predetermined critical operating range for an enforced shut down, a secondary, more stringent operating range is implemented as shut down criteria. The main burner is shut down upon one or more of the relevant parameters leaving the secondary operating range while at least one pilot burner continues to operate as long as the relevant parameters are maintained within the critical operating range.

Abstract: A method and apparatus for converting an iron-bearing residue generated in a hydrometallurgical process that contains small amounts of soluble heavy metals into a stable form by means of a neutralizing agent. The residue is elutriated and the elutriated residue is fed into at least one stabilization or homogenization reactor, into which a neutralizing agent is also routed, and the homogenous mixing together of the residue and neutralizing agent takes place by means of a helix mixer, where the ratio of the diameter of the mixer to the diameter of the reactor is 0.75-0.99.

Abstract: An apparatus for electroproduction or electrorefining of material including an electrode having a first conducting layer and a second conducting layer wherein the first conducting layer and the second conducting layer are separated by an electrically insulating layer.

Abstract: The invention relates to a method of using a suspension smelting furnace and to a suspension smelting furnace and to a concentrate burner (4). The concentrate burner (4) comprises a first gas supply device (12) for feeding a first gas (5) into the reaction shaft (2) and a second gas supply device (18) for feeding a second gas (16) into the reaction shaft (2). The first gas supply device (12) comprises a first annular discharge opening (14), which which is arranged concentrically with the mouth (8) of a feeder pipe (7), so that the first annular discharge opening (14) surrounds the feeder pipe (7). The second gas supply device (18) comprises a second annular discharge opening (17), which is arranged concentrically with the mouth (8) of the feeder pipe (7), so that the second annular discharge opening (17) surrounds the feeder pipe (7) opening (14).

Abstract: The invention relates to a method of using a flotation machine that is used in metallurgical processes and to a flotation machine. The flotation machine foams hydrophobic particles from an aqueous slurry that contains these particles. The flotation machine includes a flotation cell (1), and a rotor (2) that is inside the flotation cell. The rotor (2) is rotated at a mixing power, which maintains the suspension in the slurry and mixing of air with the slurry to form the foam, and the mixing power is controlled by adjusting the rotation speed of the rotor. The amount of solid matter S accumulated on the bottom of the cell (1) is determined, and the rotation speed of the rotor (2) is adjusted on the basis of the determined amount of solid matter. The flotation machine includes a measuring device (5) for determining the amount of solid matter accumulated on the bottom of the cell.

Abstract: A solvent extraction settler (1) comprising a foundation (2). The solvent extraction settler (1) comprises self-supporting modules (3) each having the exterior dimensions, strength and corner fittings (4) conforming to shipping container standards. The foundation (2) comprises a plurality of pillars (5) on which the modules (3) are supported at a height above the ground level, thereby providing a space for piping and access below the settler. The pillars (5) comprise shipping standard compatible container lashing fittings (6, 7) to which the corner fittings (4) of the modules (3) can be connected.