[go: up one dir, main page]

WO1989004814A1 - Procede de reduction de silicate de fer en fusion destine a produire une fibre ignifuge et chimiquement resistante ainsi que du metal de fond - Google Patents

Procede de reduction de silicate de fer en fusion destine a produire une fibre ignifuge et chimiquement resistante ainsi que du metal de fond Download PDF

Info

Publication number
WO1989004814A1
WO1989004814A1 PCT/FI1988/000189 FI8800189W WO8904814A1 WO 1989004814 A1 WO1989004814 A1 WO 1989004814A1 FI 8800189 W FI8800189 W FI 8800189W WO 8904814 A1 WO8904814 A1 WO 8904814A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
iron silicate
iron
resistant
well
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.)
Ceased
Application number
PCT/FI1988/000189
Other languages
English (en)
Inventor
Frans Heikki Tuovinen
Aarno Taneli Salervo
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.)
Outokumpu Oyj
Original Assignee
Outokumpu Oyj
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 Outokumpu Oyj filed Critical Outokumpu Oyj
Publication of WO1989004814A1 publication Critical patent/WO1989004814A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/002—Use of waste materials, e.g. slags
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool

Definitions

  • the present invention relates to a method for ulitilizing iron silicate slag in order to produce fibers resistant to high temperatures and severe chemical conditions, as well as bottom metal.
  • Metallurgical slags as such are not suitable for fibration.
  • the previously known methods for utilizing these slags in fiber production are based on the mixing of the slags with additives. These mixing agents are used to change the physical properties of the slag melt so as to be suitable for the fibration.
  • Industrial production uses almost exclusively blast furnace slags which are smelted in a cupola furnace and defibrated with a four-wheel centrifugal machine. The most generally produced end products are building insulation materials.
  • Electric furnace smelting which during the past years also has been assumed to fiber production, is now changing the situation and has enabled the utilization of new raw materials.
  • the use of an electric furnace is known for instance from the FI patent 72502.
  • the present invention is based on a different outlook.
  • the idea of this invention is to change the chemical composition of the iron silicate slag so as to be suitable for fibration by removing iron oxide from the slag.
  • Iron is present in the slag mainly as bivalent and bound in oxygen, in the form of FeO.
  • iron oxide - FeO - is an alkaline component which prevents the acidic slag components from forming continuous net structures, the existence of which is necessary for the defibration of the slag melt.
  • the slag composition is changed towards a more acidic direction, so that the SiO 2 and Al 2 O 3 contents in the slag are increased and the physical properties of the slag are changed to be favourable for defibration.
  • the removal of iron oxide is carried out by making use of the tendency to reduction of the iron oxide, which tendency is already known from cupola furnace smelting.
  • the iron oxide content of the slag is reduced by oxidizing iron from the slag for example by means of fine grounded coke or coal dust.
  • the metal obtained as the reduction product is separated from the slag and settles onto the bottom of the smelting furnace to form bottom metal.
  • the precious metals contained in the slag such as copper, nickel and cobalt, are also concentrated in the bottom metal.
  • the Fe content of the slag, as well as the amount of created metal is controlled by means of the amount of the reductive agent fed into the furnace. As a result from the reduction reactions, there is also created exhaust gas containing CO and CO 2 .
  • the reduction of iron silicate slag according to the present invention is carried out in a suitable furnace unit, for instance in an electric furnace.
  • the iron silicate slag can be fed into the furnace either in solid or in molten state.
  • the reductive agent for instance fine grounded coke, can be fed into the molten slag for instance by injecting through a lance or through electrodes. This also brings about a mixing in the molten slag, which is necessary for the reduction reactions. The mixing is also needed for enhancing the separation of the created metal drops from the slag.
  • the tapping of slag for defibration is arranged to be continuous. As for the metal, it is removed from the furnace discontinuously through a particularly arranged tapping hole.
  • the slag melt can be processed into fibers resistant to high temperatures and severe chemical conditions according to generally known defibration methods.
  • the composition of the created metal is essentially dependent on the amount of reductible metal oxides contained in the slag.
  • the Fe content of the bottom metal is generally over 90%, while the rest metals are among others precious metals such as copper, nickel and cobalt.
  • iron silicate slag renders two valuable end products: fiber and metal
  • iron silicate slag can be fed into the reduction furnace in molten state, so that the thermal energy contained by the slag is also made use of.
  • iron silicate slag As a by-product from the nickel process we obtain iron silicate slag, its typical chemical composition being: Fe 41.5%, SiO 2 29.5%, CaO 1.5%, MgO 6.5% and Al 2 O 3 4.1%.
  • defibratable slag With 75% of the iron contained in the slag is reduced according to the invention, we obtain defibratable slag with the following composition: Fe 17.6%, Sio 2 51.0%, CaO 2.6%, MgO 11.1% and Al 2 O 3 7.5%. All percentages are percentages by weight.
  • the molar alkalinity of the slag is 0.69. Per each consumed ton of iron silicate, the yield of defibratable slag mixture is roughly 590 kg and that of metal roughly 325 kg.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Glass Compositions (AREA)

Abstract

La présente invention se rapporte à un procédé d'utilisation de laitier de silicate de fer pour produire des fibres résistantes à des températures élevées et à des conditions chimiques rigoureuses, ainsi que du métal de fond contenant des métaux précieux. Les propriétés de la fibre produite à partir du laitier en fusion sont bonnes lorsque l'alcalinité molaire (FeO+CaO+MgO)/(SiO2+Al2O3) du laitier destiné au défibrage est comprise entre 0,5 et 8.
PCT/FI1988/000189 1987-11-27 1988-11-18 Procede de reduction de silicate de fer en fusion destine a produire une fibre ignifuge et chimiquement resistante ainsi que du metal de fond Ceased WO1989004814A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI875239A FI86409C (fi) 1987-11-27 1987-11-27 Reducering av jaernsilikatslagg foer framstaellning av eldfast och kemiskt bestaendig fiber och bottenmetall.
FI875239 1987-11-27

Publications (1)

Publication Number Publication Date
WO1989004814A1 true WO1989004814A1 (fr) 1989-06-01

Family

ID=8525486

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1988/000189 Ceased WO1989004814A1 (fr) 1987-11-27 1988-11-18 Procede de reduction de silicate de fer en fusion destine a produire une fibre ignifuge et chimiquement resistante ainsi que du metal de fond

Country Status (4)

Country Link
EP (1) EP0353265A1 (fr)
JP (1) JPH02502373A (fr)
FI (1) FI86409C (fr)
WO (1) WO1989004814A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088861B (de) * 1955-08-13 1960-09-08 Hoerder Huettenunion Ag Verfahren zum Herstellen von Schlackenwolle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088861B (de) * 1955-08-13 1960-09-08 Hoerder Huettenunion Ag Verfahren zum Herstellen von Schlackenwolle

Also Published As

Publication number Publication date
FI86409C (fi) 1992-08-25
EP0353265A1 (fr) 1990-02-07
FI86409B (fi) 1992-05-15
FI875239L (fi) 1989-05-28
FI875239A0 (fi) 1987-11-27
JPH02502373A (ja) 1990-08-02

Similar Documents

Publication Publication Date Title
EP1036044B2 (fr) Production de fibres vitreuses
US20080302210A1 (en) Steel desulphurating agent and use thereof in the desulphuration of steel
WO1999028252B1 (fr) Briquettes pour la production de fibres minerales et leur utilisation
US5750255A (en) High strength rock wool and process for producing same
CA1233029A (fr) Methode de production de plomb metallique par affinage directe
US4946811A (en) Method for mixing molten iron silicate with ferroalloy slag in order to produce fire-resistant and chemically resistant fiber
CN100494413C (zh) 一种铁水脱硫预处理炉渣改性剂及其制备方法
EP0485399A1 (fr) Procede de fabrication de fibres minerales incorporant un residu a teneur en alumine provenant d'un processus de fusion de metal, et fibres ainsi produites
CN115298144A (zh) 人造玻璃质纤维的制造方法
WO1989004814A1 (fr) Procede de reduction de silicate de fer en fusion destine a produire une fibre ignifuge et chimiquement resistante ainsi que du metal de fond
CN119504116A (zh) 人造玻璃质纤维的制造方法
CN1343794A (zh) V2O3电铝热法冶炼FeV80工艺
WO1999028248B1 (fr) Procede de production de fibres vitreuses
CA1174855A (fr) Methode de production de metal en fusion fait essentiellement de manganese et de fer
EP0815062B2 (fr) Procede de fabrication de fibres minerales
CA1150323A (fr) Materiau incombustible pour materiel de coulee de l'acier
PL172681B1 (pl) Sposób wytwarzania brykietów stanowiacych material wsadowy PL
CN85103967A (zh) 稀土精矿球团(或块)矿热炉制备稀土精矿渣和含铌磷铁
EP1345862B1 (fr) Matiere premiere servant a produire des fibres minerales
SU1089137A1 (ru) Шлакообразующа смесь дл обработки чугуна рабочего сло двухслойных прокатных валков
CN117604193A (zh) 一种含稀土氧化物的聚渣剂、制备工艺及其应用
CA1099523A (fr) Methode d'extraction du zinc contenu dans des laitiers
SU1735004A1 (ru) Способ получени каменного лить
EA045803B1 (ru) Способ изготовления искусственных стекловидных волокон
JPS60122751A (ja) 耐アルカリ性ガラス繊維用原料組成物

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1988910413

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1988910413

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1988910413

Country of ref document: EP