Method and carrier for transporting reductant such as coke into a metallurgical furnace and production method of the carrier

Patent metadata

Field	Value
Publication number	US-2018179613-A1
Application number	US-201515129170-A
Country	US
Kind code	A1
Filing date	Mar 31, 2015
Priority date	Mar 31, 2014
Publication date	Jun 28, 2018
Grant date	—

Abstract

Provided is a method for transporting reductant such as coke into a metallurgical furnace containing a bottom layer containing molten metal and a top layer on top of the bottom layer containing molten metal. The method comprises a first providing step for providing reductant, a second providing step for providing metal, a forming step for forming carriers containing reductant and metal of reductant provided in the first providing step and metal provided in the second providing step, and a feeding step for feeding carriers formed in the forming step into the metallurgical furnace. Also provided is a carrier and a production method for producing carriers.

First claim

1 - 8 . (canceled)

9 . A method for transporting reductant such as coke into a metallurgical furnace containing a bottom layer containing molten metal and a top layer on top of the bottom layer,
wherein by a first providing step for providing reductant, by a second providing step for providing metal, by a forming step for forming carriers containing reductant and metal of reductant provided in the first providing step and metal provided in the second providing step, by a feeding step for feeding carriers formed in the forming step into the metallurgical furnace, and by forming carriers containing reductant and metal in the forming step having at least the density of the top layer.

10 . The method according to claim 9 , wherein forming carriers containing reductant and metal in the forming step having a density that is lower than the density of the bottom layer containing molten metal.

11 . The method according to claim 9 , wherein forming carriers containing reductant and metal in the forming step having a density of 110 to 190%, preferably 125 to 150%, of the density of the top layer.

12 . The method according to claim 9 , wherein providing metal in the second providing step in the form of copper scrap such as rejected cast anodes, spent cast anodes, and secondary copper.

13 . The method according to claim 9 , wherein
by forming in the forming step carriers containing reductant and metal in the form of copper so that the carriers containing in mass percentages between 10 and 70% copper, preferably between 20 and 60% copper, more preferable between 25 and 50% copper, the rest being reductant and optionally binder such as water and possible impurities originating from the reductant provided in the first providing step and/or originating from the copper provided in the second provided step.

14 . The method according to claim 9 , wherein forming in the forming step carriers containing reductant and metal having an average grain size between 10 and 200 mm.

15 . The method according to claim 9 , wherein the forming step includes a pressing step for pressing the carriers by means of a press such as a hydraulic press.

16 . The method according to claim 9 , wherein the forming step includes a drying step for drying the carriers.

Assignees

• Outotec Finland Oy

Inventors

• Scheidema Madeleine

Classifications

• Y02P10/20

  Recycling · CPC title

• C22B15/0039

  in electric furnaces · CPC title

• C22B7/04

  Working-up slag · CPC title

• C22B15/0054 Primary

  Slag, slime, speiss, or dross treating · CPC title

• B09B3/29

  involving a melting or softening step · CPC title