СПОСІБ ПРЯМОГО ПЛАВЛЕННЯ

    公开(公告)号:UA111829C2

    公开(公告)日:2016-06-24

    申请号:UAA201304514

    申请日:2011-09-15

    Abstract: Успособіпрямогоплавленнянаосновіваннирозплавурегулюютьумовипроцесув ємностіпрямогоплавленнятак, щобрідкийшлаку ваннірозплавуметалуі шлакув ємностімавв'язкість 0,5-5 пуазівв інтерваліробочихтемпературпроцесу.

    Starting a smelting process
    43.
    发明专利

    公开(公告)号:NZ626933A

    公开(公告)日:2016-01-29

    申请号:NZ62693312

    申请日:2012-12-06

    Abstract: Disclosed is a method of starting a smelting process in a smelting vessel that includes a main chamber for smelting a metalliferous material and producing molten metal and a forehearth connected to the main smelting chamber via a forehearth connection. The smelting vessel contains frozen slag that blocks at least the forehearth connection. The method of starting the process includes heating frozen slag and forming molten slag and draining molten slag from the forehearth connection via the forehearth and establishing a clear flow path through the forehearth connection. Thereafter the smelting process is hot started by a series of steps including supplying a charge of molten metal into the main chamber via the forehearth connection and supplying feed materials to the process and smelting the metalliferous material and producing molten metal. The molten slag is removed via a forehearth end-drain taphole in a lowest region of the forehearth. The frozen slag in the forehearth connection is heated and melted via oxygen-enriched gas burners and/or oxygen lances. Where there is frozen slag in the main chamber, as well as frozen slag in the forehearth connection, the method includes heating and melting frozen slag in the main chamber and the forehearth connection. The frozen slag in the main chamber is heated and melted via heat from a burner system for the main chamber.

    A SOLIDS INJECTION LANCE
    45.
    发明专利

    公开(公告)号:CA2910537A1

    公开(公告)日:2014-11-20

    申请号:CA2910537

    申请日:2014-05-02

    Abstract: A method for injecting a solid feed material through a solids injection lance includes creating flow conditions in an injection passageway of the lance so that at least a part of the feed material flowing along the passageway forms a buffer zone between a wall of a tube that defines the passageway and feed material flowing along a central section of the passageway.

    A TWO-STAGE SMELTING PROCESS AND APPARATUS

    公开(公告)号:CA2890267A1

    公开(公告)日:2014-05-15

    申请号:CA2890267

    申请日:2013-11-12

    Abstract: A two-stage molten bath-based smelting process for producing molten metal from a metalliferous feed material includes (a) preheating metalliferous feed material in a preheater and (b) injecting preheated metalliferous feed material and a solid carbonaceous material into a molten bath of a smelting vessel and smelting metalliferous feed material in the molten bath and forming molten metal and an offgas. The process includes cooling and cleaning the offgas from the smelting vessel and producing a fuel gas. The preheating stage (a) includes preheating the metalliferous feed material by generating heat by combusting at least a part for the fuel gas that is supplied to the preheating stage at a temperature of less than 300º C.

    LANCE UNBLOCKING METHOD AND APPARATUS

    公开(公告)号:CA2976987C

    公开(公告)日:2022-04-26

    申请号:CA2976987

    申请日:2016-02-16

    Abstract: A method of removing a blockage in a solids injection lance under normal operating conditions of a direct smelting vessel is disclosed. The direct smelting vessel contains a bath of molten metal and slag and the solids injection lance extends into the direct smelting vessel and has an outlet end that is submerged in the molten slag. The solids injection lance further has a single inlet coupled to a section of supply line that conveys gas and solid feed material to the solids injection lance. The method comprises (a) advancing a blockage-removing tool through the supply line section and through the solids injection lance to an upstream side of the blockage, (b) operating the tool under elevated gas pressure conditions to remove the blockage such that solid feed material and gas are able to flow through the solids injection lance. The method further comprises (c) retracting the tool from the solids injection lance and the supply line section. Also disclosed is an apparatus for removing a blockage in a solids injection lance extending into a direct smelting vessel.

    METHOD OF SEALING AND REPAIRING A REFRACTORY TAP HOLE

    公开(公告)号:PH12017501187A1

    公开(公告)日:2017-12-18

    申请号:PH12017501187

    申请日:2017-06-23

    Abstract: A method of sealing a slag drain in a direct smelting vessel is disclosed. Also disclosed are a method of maintaining a slag drain channel and a direct smelting vessel with a slag drain channel that extends through a sleeve of refractory material installed in the direct smelting vessel. The method for sealing the slag drain includes locating a pre-formed refractory material at an inlet end of the slag drain channel so that it is exposed to a molten bath contained within the direct smelting vessel and sealing the slag drain channel with sealing material downstream of the pre-formed refractory material.

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