Method for producing iron carbide from granulated sponge iron

    公开(公告)号:AU7212398A

    公开(公告)日:1998-11-13

    申请号:AU7212398

    申请日:1998-03-28

    Applicant: OUTOTEC OYJ

    Abstract: Process for producing Iron carbide wherein, in a first stage, Iron ore is reduced to sponge iron using a reducing gas containing at least 90% hydrogen, on a nitrogen-free basis, to produce a sponge iron having a carbon content of less than 1% wt.; then in a second stage the sponge iron is fluidized at a temperature of 500 to 800° C. with a methane-containing fluidizing gas in a fluidized bed reactor wherein the water content of the gas in the reactor is not more than 1.5% wt., to produce a product wherein at least 85% of the iron content is in the form of Fe3C.

    Metallurgical process and plant herefor

    公开(公告)号:AU2009225023B2

    公开(公告)日:2013-08-15

    申请号:AU2009225023

    申请日:2009-02-12

    Applicant: OUTOTEC OYJ

    Abstract: This invention relates to a metallurgical process for the production and/or treatment of at least one metal or ore in a reactor (1, 3), from which a waste gas stream loaded with molten particles and/or vaporous constituents is discharged via a waste gas conduit (7) and subjected to an aftertreatment by supplying at least one cooling gas or cooling gas mixture. On the side of the waste gas conduit (7) facing the reactor (1, 3) a cooling gas or cooling gas mixture (9), whose temperature is lower than that of the waste gas stream, is injected into the waste gas conduit (7) with a high velocity. Furthermore, this invention relates to a corresponding plant.

    7.
    发明专利
    未知

    公开(公告)号:EE05623B1

    公开(公告)日:2013-02-15

    申请号:EEP200900070

    申请日:2008-01-23

    Applicant: OUTOTEC OYJ

    Abstract: The method for the distribution of a solid flow (m 0) drawn-off from a cyclone or a fluidized bed container (1), comprises conducting the solid flow (m 0) over a first down pipe (7) and then fluidizing at the bottom of the down pipe by supplying a carrier gas, conveying a part of the solid flow (m 1) towards the top by the carrier gas over a first riser (9) branching off from the first down pipe, leading away the remaining part of the solid flow (m 0) over a second down pipe (13) adjacent itself to the first down pipe and then fluidizing at the bottom of the second down pipe. The method for the distribution of a solid flow (m 0) drawn-off from a cyclone or a fluidized bed container (1), comprises conducting the solid flow (m 0) over a first down pipe (7) and then fluidizing at the bottom of the down pipe by supplying a carrier gas, conveying a part of the solid flow (m 1) towards the top by the carrier gas over a first riser (9) branching off from the first down pipe, leading away the remaining part of the solid flow (m 0) over a second down pipe (13) adjacent itself to the first down pipe and then fluidizing at the bottom of the second down pipe by supplying the carrier gas, and conveying a part of the solid flow (m 2) towards the top by the carrier gas over a second riser (15) branching off from the second down pipe. The supply of the carrier gas is varied at the bottom of the first and/or the second down pipe. The pressure difference over the fluidized bed container is used as controlled variable for the supply of the carrier gas to the first or the second down pipe. The supply of the carrier gas is constantly held at the bottom of the first down pipe. The pressure difference between the bottom and the head of the first and/or the second down pipe is smaller than the pressure loss corresponding to the fluidized down pipe. The pressure at the bottom of each down pipe is larger than the pressure at the head of this down pipe. The conveying air is brought beneath the first and/or the second riser in each case over a downwardly arranged nozzle. The carrier gas is admitted with low volume flow for the interruption of the solid flow in a riser, so that the minimum fluidization speed is not exceeded in the riser. An independent claim is included for a device for the distribution of a solid flow drawn-off from a cyclone or a fluidized bed container.

    8.
    发明专利
    未知

    公开(公告)号:AT526548T

    公开(公告)日:2011-10-15

    申请号:AT09720639

    申请日:2009-02-12

    Applicant: OUTOTEC OYJ

    Abstract: A process for the production and/or treatment of at least one metal in a reactor includes discharging a waste gas stream via a waste gas conduit and after-treating the waste gas stream by supplying a cooling gas and/or a cooling gas mixture. The after-treating includes injecting the cooling gas and/or cooling gas mixture into the waste gas conduit on a side of the waste gas conduit facing the reactor, at a high velocity and substantially tangentially with respect to a main flow direction of the waste gas. A volume of the cooling gas and/or the cooling gas mixture injected into the waste gas conduit is adjusted so as to reduce a mixing temperature below a melting temperature of the molten particles and/or a condensation temperature of the vaporous constituents of the waste gas stream.

    10.
    发明专利
    未知

    公开(公告)号:BRPI0808110A2

    公开(公告)日:2014-06-17

    申请号:BRPI0808110

    申请日:2008-01-23

    Applicant: OUTOTEC OYJ

    Abstract: The method for the distribution of a solid flow (m 0) drawn-off from a cyclone or a fluidized bed container (1), comprises conducting the solid flow (m 0) over a first down pipe (7) and then fluidizing at the bottom of the down pipe by supplying a carrier gas, conveying a part of the solid flow (m 1) towards the top by the carrier gas over a first riser (9) branching off from the first down pipe, leading away the remaining part of the solid flow (m 0) over a second down pipe (13) adjacent itself to the first down pipe and then fluidizing at the bottom of the second down pipe. The method for the distribution of a solid flow (m 0) drawn-off from a cyclone or a fluidized bed container (1), comprises conducting the solid flow (m 0) over a first down pipe (7) and then fluidizing at the bottom of the down pipe by supplying a carrier gas, conveying a part of the solid flow (m 1) towards the top by the carrier gas over a first riser (9) branching off from the first down pipe, leading away the remaining part of the solid flow (m 0) over a second down pipe (13) adjacent itself to the first down pipe and then fluidizing at the bottom of the second down pipe by supplying the carrier gas, and conveying a part of the solid flow (m 2) towards the top by the carrier gas over a second riser (15) branching off from the second down pipe. The supply of the carrier gas is varied at the bottom of the first and/or the second down pipe. The pressure difference over the fluidized bed container is used as controlled variable for the supply of the carrier gas to the first or the second down pipe. The supply of the carrier gas is constantly held at the bottom of the first down pipe. The pressure difference between the bottom and the head of the first and/or the second down pipe is smaller than the pressure loss corresponding to the fluidized down pipe. The pressure at the bottom of each down pipe is larger than the pressure at the head of this down pipe. The conveying air is brought beneath the first and/or the second riser in each case over a downwardly arranged nozzle. The carrier gas is admitted with low volume flow for the interruption of the solid flow in a riser, so that the minimum fluidization speed is not exceeded in the riser. An independent claim is included for a device for the distribution of a solid flow drawn-off from a cyclone or a fluidized bed container.

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