Outotec Oyj

Outotec (Finland) Oy

Tapio Ahokainen

Peter Björklund

Markku Lahtinen

Lauri P Pesonen

Kaarle Peltoniemi

Jussi Sipilä

Peter Bjorklund

Risto Saarinen

Jiliang Xia

Kaj Eklund

Mikael P Jåfs

Aki Laaninen

Eero Hugg

Kari Pienimäki

Elli Miettinen

Tuomo Jokinen

Sarianna Suominen

Harri Rannikko

Maija Metsärinta

Jorma Myyri

Markku Ylönen

Mikael Jåfs

Markku Ylonen

Jussi Sipilae

Mikael JÅFS

Jussi Sipila

P Pesonen Lauri

The invention relates to a method for controlling suspension in a suspension smelting furnace. The method comprises feeding additionally to pulverous solid matter and additionally to reaction gas reducing agent into the suspension smelting furnace, wherein reducing agent is fed in the form of a concentrated stream of reducing agent through the suspension in the reaction shaft onto the surface of the melt to form a reducing zone containing reducing agent within the collection zone of the melt.

Method for controlling the suspension in a suspension smelting furnace

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

Method and arrangement for feeding fine-grained matter to a concentrate or matte burner of a suspension smelting furnace

Provided are a method and an arrangement for feeding process gases from a suspension smelting furnace into a waste heat boiler. The arrangement comprises a feeding throat for feeding process gas. The feeding throat is connected to an uptake inner space at an exit. The feeding throat is connected to the waste heat boiler at an entrance. The feeding throat having a feeding channel comprising a channel inner roof. At least one of an uptake inner roof of the uptake of the suspension smelting furnace and the channel inner roof of the feeding channel of the feeding throat is provided with an angled and/or curved section that slopes at least partly downwardly in an angled and/or curved manner in the direction towards the entrance.

Method and arrangement for feeding process gases from a suspension smelting furnace into a waste heat boiler

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

Arrangement for feeding fine-grained matter to a concentrate or matte burner of a suspension smelting furnace

An arrangement for feeding fine-grained matter to a concentrate or matte burner () of a suspension smelting furnace (). The arrangement comprising a fluidization arrangement () for feeding fluidized fine-grained matter into a dosing bin (), and a conveyor means () for feeding fluidized fine-grained matter from the dosing bin () to the concentrate or matte burner () of the suspension smelting furnace (), and a loss-in-weight controller () between the dosing bin () and the conveyor means (). The arrangement comprises an impact cone () arranged below a filling valve () between the fluidization arrangement () and the dosing bin () for distributing fluidized fine-grained matter flowing from the fluidization arrangement () within the dosing bin ().

The invention relates to a method of using a suspension smelting furnace and to a suspension smelting furnace and to a concentrate burner (). The concentrate burner () comprises a first gas supply device () for feeding a first gas () into the reaction shaft () and a second gas supply device () for feeding a second gas () into the reaction shaft (). The first gas supply device () comprises a first annular discharge opening (), which which is arranged concentrically with the mouth () of a feeder pipe (), so that the first annular discharge opening () surrounds the feeder pipe (). The second gas supply device () comprises a second annular discharge opening (), which is arranged concentrically with the mouth () of the feeder pipe (), so that the second annular discharge opening () surrounds the feeder pipe () opening ().

Method of using a suspension smelting furnace, a suspension smelting furnace, and a concentrate burner

The invention relates to a suspension smelting furnace comprising a reaction shaft (), an uptake shaft (), and a lower furnace (), as well as a concentrate burner () for feeding reaction gas and fine solids into the reaction shaft () of the suspension smelting furnace. The concentrate burner () comprises a fine solids discharge channel () that is radially limited by the wall () of the solids discharge channel, a fine solids dispersion device () in the fine solids discharge channel (), an annular reaction gas channel () that surrounds the fine solids discharge channel () and is radially limited by the wall () of the annular reaction gas channel (), and a cooling block () that surrounds the annular reaction gas channel (). The cooling block () is a component that is manufactured by a continuous casting method. The cooling block () is attached to the arch () of the reaction shaft () and the wall () of the annular reaction gas channel (), so that the discharge orifice () of the annular reaction gas channel () is formed between a structure (), which is jointly formed by the cooling block () and the wall () of the annular reaction gas channel (), and the wall () of the solids discharge channel. The invention also relates to a concentrate burner () for feeding reaction gas and fine solids into the reaction shaft () of a suspension smelting furnace.

Suspension smelting furnace and a concentrate burner

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

Method and arrangement for feeding fine-grained matter to a concentrate burner or a matte burner of a suspension smelting furnace and controlling means and computer program product

The invention relates to a method for controlling suspension () in a suspension smelting furnace (), to a suspension smelting furnace, and to a concentrate burner (). The method comprises feeding additionally to pulverous solid matter () and additionally to reaction gas () reducing agent () into the suspension smelting furnace (), wherein reducing agent () is fed in the form of a concentrated stream of reducing agent () through the suspension () in the reaction shaft () onto the surface () of the melt () to form a reducing zone () containing reducing agent () within the collection zone () of the melt ().

Method for controlling the suspension in a suspension smelting furnace, a suspension smelting furnace, and a concentrate burner

The invention relates to a method and to an arrangement for refining copper concentrate. The arrangement includes a suspension smelting furnace comprising a reaction shaft, and a settler. The reaction shaft is provided with a concentrate burner for feeding copper concentrate such as copper sulfide concentrate and/or copper matte and additionally at least reaction gas into the reaction shaft to obtain a blister layer containing blister and a first slag layer containing slag on top of the blister layer in the settler, and a slag cleaning furnace. The arrangement includes a feeder configured for feeding blister from the blister layer in the settler and for feeding slag from the first slag layer in the settler into the slag cleaning furnace.

Method and arrangement for refining copper concentrate

The invention relates to a method for controlling the thermal balance of a suspension smelting and to a suspension smelting furnace. The suspension smelting furnace, comprising a reaction shaft (), a lower furnace (), and an uptake (), wherein the reaction shaft () having a shaft structure () that is provided with a surrounding wall structure () and a roof structure () and that limits a reaction chamber (), and wherein the reaction shaft () is provided with a concentrate burner () for feeding pulverous solid matter and reaction gas into the reaction chamber (). The shaft structure () of the reaction shaft () is provided with cooling means () for feeding endothermic material into the reaction chamber () of the reaction shaft ().

Method for controlling thermal balance of a suspension smelting furnace and suspension smelting furnace

The invention relates to a method of using a suspension smelting furnace and to a suspension smelting furnace and to a concentrate burner (). The concentrate burner () comprises a first gas supply device () for feeding a first gas () into the reaction shaft () and a second gas supply device () for feeding a second gas () into the reaction shaft (). The first gas supply device () comprises a first annular discharge opening (), which is arranged concentrically with the mouth () of a feeder pipe (), so that the first annular discharge opening () surrounds the feeder pipe (). The second gas supply device () comprises a second annular discharge opening (), which is arranged concentrically with the mouth () of the feeder pipe (), so that the second annular discharge opening () surrounds the feeder pipe () opening ().

The invention relates to a method of controlling the thermal balance of the reaction shaft of a suspension smelting furnace and to a concentrate burner for feeding reaction gas and pulverous solid mater into the reaction shaft of the suspension smelting furnace. In the method, endothermic material () is fed by the concentrate burner () to constitute part of the mixture formed from the powdery solid matter () and reaction gas (), so that a mixture containing the powdery solid matter (), reaction gas () and endothermic material () is formed in the reaction shaft (). The concentrate burner () comprises cooling agent feeding equipment () for adding the endothermic material () to constitute part of the mixture, which is formed from the pulverous solid matter () that discharges from the orifice () of the feeder pipe and the reaction gas () that discharges through the annular discharge orifice ().

Method of controlling the thermal balance of the reaction shaft of a suspension smelting furnace and a concentrate burner

A sealing device is arranged around a rod electrode extending vertically through an aperture made in the ceiling of an arc furnace and being vertically movable inside the furnace to prevent the access of gases from the furnace through the aperture to the atmosphere, and on the other hand to prevent air from flowing from the atmosphere into the furnace. The sealing device comprises a gas distribution chamber provided with an inlet channel for feeding essentially passive gas, such as nitrogen or air, into the gas distribution chamber. The sealing device also includes a slit nozzle encasing the electrode, through which nozzle a gas jet is arranged to be discharged from the gas distribution chamber towards the electrode in a direction that is at an angle with respect to the horizontal plane and has a slightly upwards inclined orientation, and that is, with respect to the furnace interior, pointed outwardly, so that the sealing is carried out owing to the effect of the created stagnation pressure.

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Helsinki, Finland

Tapio Ahokainen