EP1088046A1 - Granules de carbone - Google Patents

Granules de carbone

Info

Publication number
EP1088046A1
EP1088046A1 EP99914809A EP99914809A EP1088046A1 EP 1088046 A1 EP1088046 A1 EP 1088046A1 EP 99914809 A EP99914809 A EP 99914809A EP 99914809 A EP99914809 A EP 99914809A EP 1088046 A1 EP1088046 A1 EP 1088046A1
Authority
EP
European Patent Office
Prior art keywords
weight
pellets
carbon
biomass
fine particulate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99914809A
Other languages
German (de)
English (en)
Inventor
Egil Auganes
Inger Johanne Eikeland
Roger Haukoy
Jan Mohaug
Oddbjorn Paulsen
Thor Sonstelien
Halvard Tveit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elkem ASA
Original Assignee
Elkem ASA
Elkem Materials AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elkem ASA, Elkem Materials AS filed Critical Elkem ASA
Publication of EP1088046A1 publication Critical patent/EP1088046A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the present invention relates to carbon-containing pellets for the use as reduction material in electric smelting furnaces for the production of metals and alloys, more particularly for the use in electric smelting furnaces for the production of pig iron, ferro alloys and silicon.
  • Pellets as described above which only contains biomass produced from wood chips and paper, further have the disadvantage that they have a high volume compared to the content of fixed carbon and it is therefore difficult to substitute a major part of reduction material based on fossile carbon with this type of pellets.
  • the present invention relates to pellets for the use as a reduction material in metallurgical reduction processes for the production of metals and alloys, said pellets comprising 40 - 95 % by weight of biomass produced by treatment of woodchips and optionally paper with water vapour under high pressure and 5 - 60 % by weight of one or more fine particulate carbon materials containing a substantial amount of elemental carbon.
  • the biomass is produced by treatment with water vapour under high pressure of a mixture comprising 90 - 99.5 % by weight of wood chips and 0.5 - 10 % by weight of paper, preferably 96 - 99 % by weight of wood chips and 1 - 4 % by weight of paper.
  • the pellets comprises 50 - 70 % by weight of biomass and 30 - 50 % by weight of fine particulate carbon material.
  • fine particulate carbon material containing a substantial amount of elemental carbon it can be used coal, coke, char coal and carbon black having a particle size below 5 mm and preferably below 3 mm.
  • the carbon-containing pellets according to present invention have a very high reactivity. It has thus been found that so-called SiO reactivity of the pellets according to the present invention is substantially higher than the SiO reactivity of both biomass and of the carbon materials as such. Further, the pellets have a good strength allowing the pellets to be transported and added to smelting furnaces without being broken to any substantial extent. Further, the pellets according to the present invention typically have a content of fixed carbon of between 30 and 40 % which is substantially higher than for biocarbon pellets having no additive of fine particulate carbon material.
  • the emission of CO 2 from fossil carbon material can be reduced up till 100 % in case fine particulate material from char coal is used as fine particulate carbon material in the pellets of the present invention.
  • the pellets according to the present invention are produced by mixing dried biomass produced by treatment of wood chips and optionally paper with water vapour under high pressure and the fine particulate carbon material whereafter the mixture is extruded to pellets using the natural lignin content of the biomass as a binder. Thus not external binder has to be added.
  • Pellets according to the present invention containing 75 % by weight of biomass produced by treatment of 98 % by weight of wood chips and 2 % by weight of paper with water vapour under high pressure and 25 % by weight of particulate coal having a particle size less than 3,8 mm, were examined as to SiO reactivity.
  • pellets without addition of fine particulate coal and consisting of 100 % biomass produced by treatment by weater vapour under high pressure of 96 % by weight of wood chips and 4 % by weight of paper was examined as to SiO reactivity.
  • SiO reactivity was measured by means of a standardized method where a gas mixture consisting of 13.5 % SiO, 4.5 % CO the remainder being argon, at a temperature of about 1650°C is passed through a bed of the material to be tested. When the gas mixture comes into contact with the carbon material in the bed, more or less SiO(g) will react with the carbon to form SiC and CO- gas. The content of CO in the gas mixture which has passed through the carbon materials in the bed is analyzed and the amount of SiO which has reacted with carbon for the formation of SiC is calculated. Based on this a reactivity number is determined.
  • the results of the SiO reactivity tests are shown in figure 1 , where the arrow marked 1 shows the SiO reactivity for pellets according to the present invention and where the arrow marked 2 shows the SiO reactivity for pellets having no addition of fine particulate coal.
  • figure 1 there are further shown ranges of SiO reactivity for a number of conventional reduction materials.
  • the pellets according to the present invention have a very high SiO reactivity, substantially higher than coal and also higher than pellets consisting only of biomass produced from wood chips and paper. It was very surprising that the pellets according to the invention showed a synergistic effect as to SiO reactivity.
  • Pellets according to the present invention containing 60 % by weight of biomass produced by treatment of wood chips with water vapour under high pressure and 40 % by weight of carbon black having a particle size between 200 and 300 ⁇ m were examined as to SiO reactivity using the same method as described in Example 1
  • Pellets according to the present invention containing 60 % by weight of biomass produced by treatment of wood chips with water vapour under high pressure and 40 % by weight of fine particulate petrol coke were examined as to SiO reactivity using the same method as described in example 1.
  • the result of the SiO reactivity is shown in figure 1 with arrow marked 4.
  • the pellets containing petrol coke according to the present invention show a remarkably high SiO reactivity compared both to petrol coke as such and also to biomass as such.

Abstract

La présente invention concerne des granulés de carbone utilisés comme matériau de réduction dans des processus métallurgiques de réduction destinés à la fabrication de métaux et d'alliages. Les granulés comprennent, d'une part, de 40 à 95 % en poids de la biomasse obtenue par le traitement de copeaux de bois, et éventuellement du papier, au moyen de la vapeur haute pression et, d'autre part, de 5 à 60 % en poids d'un ou de plusieurs matériaux à fines particules de carbone qui contiennent une quantité importante de carbone élémentaire.
EP99914809A 1998-04-06 1999-03-29 Granules de carbone Withdrawn EP1088046A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO981548 1998-04-06
NO981548A NO306786B1 (no) 1998-04-06 1998-04-06 Reduksjonsmiddelpellets
PCT/NO1999/000105 WO1999051710A1 (fr) 1998-04-06 1999-03-29 Granules de carbone

Publications (1)

Publication Number Publication Date
EP1088046A1 true EP1088046A1 (fr) 2001-04-04

Family

ID=19901884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99914809A Withdrawn EP1088046A1 (fr) 1998-04-06 1999-03-29 Granules de carbone

Country Status (5)

Country Link
EP (1) EP1088046A1 (fr)
AU (1) AU3346999A (fr)
BR (1) BR9909450A (fr)
NO (1) NO306786B1 (fr)
WO (1) WO1999051710A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO320971L (no) 2004-07-08 2006-02-20 Norsk Pellets Vestmarka As Fremgangsmate for fremstilling av brenselspellets
SE534484C2 (sv) * 2009-02-16 2011-09-06 Zilkha Biomass Fuels Llc Förfarande för framställning av bränslepelletar utgående från ett biologiskt råmaterial, ett arrangemang därför och bränslepelletar
FR2985734B1 (fr) * 2012-01-12 2015-01-09 Europ De Biomasse Composition de biocombustible et procede de fabrication d'un biocombustible
CN110387445B (zh) * 2019-08-16 2021-08-10 东北大学 一种采用木质素为还原剂生产直接还原铁的方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668105A (en) * 1951-04-04 1954-02-02 Alan N Mann Method of producing sponge iron
DE2935544A1 (de) * 1979-09-03 1981-03-19 Fritz Dr.Rer.Nat. 7889 Grenzach Mindermann Herstellung von eisen aus eisenoxyd mit belebtschlamm (klaerschlamm) und bzw. o.a. kohlenstoffhaltigen abfallstoffen
DE3130038A1 (de) * 1980-09-04 1982-04-08 ARBED S.A., 2930 Luxembourg Verfahren zum kontinuierlichen einblasen von ueberwiegend aus steinkohle bestehenden, feinkoernigen reduktionsmitteln in einen schachtofen
FR2521592B1 (fr) * 1982-02-12 1986-06-27 Armines Procede pour l'execution de reactions reductrices en metallurgie et produit utilise
DE4207535A1 (de) * 1992-03-10 1993-09-16 Johannes Prof Dr Rer N Gartzen Verfahren zur einbringung von kohlenstoff als reduktionsmittel bei der pyrometallurgischen erzeugung von metallen
NO300094B1 (no) * 1994-09-28 1997-04-07 Cambi As Fremgangsmate og anordning ved hydrolyse av organisk materiale under reduserende betingelser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9951710A1 *

Also Published As

Publication number Publication date
NO981548D0 (no) 1998-04-06
AU3346999A (en) 1999-10-25
NO306786B1 (no) 1999-12-20
NO981548L (no) 1999-10-07
BR9909450A (pt) 2000-12-12
WO1999051710A1 (fr) 1999-10-14

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