WO1991017125A1 - Four de fusion destine a la fusion de matiere brute a fibres minerales - Google Patents

Four de fusion destine a la fusion de matiere brute a fibres minerales Download PDF

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Publication number
WO1991017125A1
WO1991017125A1 PCT/FI1991/000127 FI9100127W WO9117125A1 WO 1991017125 A1 WO1991017125 A1 WO 1991017125A1 FI 9100127 W FI9100127 W FI 9100127W WO 9117125 A1 WO9117125 A1 WO 9117125A1
Authority
WO
WIPO (PCT)
Prior art keywords
melting furnace
melting
discharge opening
raw material
melt
Prior art date
Application number
PCT/FI1991/000127
Other languages
English (en)
Inventor
Peter Arnold Henrik Solin
Pertti Kalevi Hjerppe
Carl-Gustav NYGÅRDAS
Original Assignee
Paroc Oy Ab
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 Paroc Oy Ab filed Critical Paroc Oy Ab
Publication of WO1991017125A1 publication Critical patent/WO1991017125A1/fr
Priority to NO924228A priority Critical patent/NO924228D0/no

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
    • C03B5/262—Drains, i.e. means to dump glass melt or remove unwanted materials

Definitions

  • This invention concerns a melting furnace for the melting of mineral fibre raw material, the furnace comprising a bottom part, side walls and a cover, supply means for the raw material, as well as a discharge opening in the side wall for mineral melt arranged at a distance from the bottom part of the melting furnace, and a discharge opening for emptying the melting furnace, at the level of the bottom part.
  • Mineral wool products of glass wool, rock wool and slag wool type are the most well known and used products for both heat and acoustical insulation.
  • the iron oxide, or part thereof, contained in the mineral raw material or the slag is reduced to metallic iron and sinks to the bottom of the furnace in the form of an iron melt, which continuously increases in volume.
  • the iron melt has to be removed at regular intervals from the melting furnace.
  • the iron melt is removed through a discharge opening in the bottom of the melting furnace, whereby the iron melt is completely removed at each emptying operation. This method cf proceeding is used e.g. in the melting furnace according the Fl-patent application no 853458.
  • the mineral melt formed during the melting process has a very corrosive effect on the walls of the melting furnace. This results in the fact that the melting furnace on its inside has to be provided with an extremely corrosion resistant lining, which is both expensive and difficult to apply.
  • the iron melt which collects at the bottom of the melting furnace has a much gentler effect on the lining than the mineral melt. If it is possible to prevent the iron melt from sinking below a predetermined level, it is possible to use in the bottom part of the melting furnace a much cheaper lining.
  • pig iron is added to the melting furnace prior to starting the introduction of rock raw material.
  • the melting furnace comprises a bottom part 1, side walls 2 and a cover 3.
  • a number of electrode rods 5, preferably of graphite, extend through the cover by means of which the raw material 9 is melted.
  • This raw material 9 is introduced into the melting furnace by means of supply means (not shown), which are arranged to distribute the rock raw material 9 in a substantially even layer over the mineral melt 8 formed during the melting process.
  • Mineral melt 8 is withdrawn during the melting process in a constant flow from the melting furnace through a discharge opening 4 arranged in the side wall 2 to a spinning device (not shown) for the formation of mineral fibres.
  • the discharge opening 4 is situated at a level at a distance from the bottom part 2 of the melting furnace.
  • the melting furnace is provided with a discharge opening 6 at the level of the bottom part 2.
  • the two lower discharge openings 6 and 7 are suitably arranged in a common block, which according to a preferred embodiment is a carbon block divided into four parts, where the two outer parts, in which the respective discharge openings 6 and 7 are arranged, are replacable.
  • the inside of the block is preferably covered with a lining mix 10.
  • the discharge openings 6 and 7 are normally closed and are opened only when necessary. In order to prevent the level of the iron melt from reaching the opening 4 for the mineral melt, excess iron melt has to be removed at regular intervals. Normally excess iron melt 11 is removed from the melting furnace at about 2 to 3 months intervals.
  • the discharge opening 7 is then opened using a drilling machine or by burning with oxygen. When the desired quantity of iron melt 11 has been withdrawn from the furnace, the discharge opening 7 is closed using a mud gun (not shown) which has been precharged with heated sealing mud. The drawing shows the state when all excess iron melt has been removed.
  • the discharge opening 6 is opened only when the whole melting furnace is to be emptied, e.g. for service or for renewing the lining. Opening of the discharge opening 6 takes most conveniently place by burning with oxygen.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Inorganic Fibers (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

Four de fusion permettant la fusion d'une matière brute à fibre minérale. Ledit four comprend une partie inférieure (1), des parois latérales (2) et un couvercle (3), ainsi qu'un moyen d'alimentation en matière brute. Ledit four de fusion est doté d'un orifice de décharge (4) situé dans la paroi latérale (2) destiné à un bain de fusion minéral (8) à une certaine distance de la partie inférieure (2) dudit four de fusion, et d'un orifice de décharge (6) destiné à remplir ledit four de fusion, situé au niveau de la partie inférieure (2). Ledit four de fusion comprend également un orifice de décharge supplémentaire (7) destiné à décharger un bain de fusion de fer (11) formé pendant le processus de fusion, ménagé dans la paroi latérale (2) à un niveau supérieur à celui de l'orifice de décharge (6) destiné à vider ledit four de fusion, mais à un niveau inférieur à celui de l'orifice de décharge (4) destiné au bain de fusion minéral (8).
PCT/FI1991/000127 1990-05-04 1991-05-02 Four de fusion destine a la fusion de matiere brute a fibres minerales WO1991017125A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO924228A NO924228D0 (no) 1990-05-04 1992-11-03 Smelteovn for smelting av mineralfiberraamateriale

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI902235A FI85262C (sv) 1990-05-04 1990-05-04 Smältugn för smältning av mineralfiberråmaterial
FI902235 1990-05-04

Publications (1)

Publication Number Publication Date
WO1991017125A1 true WO1991017125A1 (fr) 1991-11-14

Family

ID=8530374

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1991/000127 WO1991017125A1 (fr) 1990-05-04 1991-05-02 Four de fusion destine a la fusion de matiere brute a fibres minerales

Country Status (5)

Country Link
EP (1) EP0527169A1 (fr)
AU (1) AU7742991A (fr)
CA (1) CA2082147A1 (fr)
FI (1) FI85262C (fr)
WO (1) WO1991017125A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2697178B1 (fr) 2011-04-13 2019-09-25 Rockwool International A/S Procédés pour former des fibres vitreuses artificielles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559683A (en) * 1949-03-15 1951-07-10 Ferro Enamel Corp Electric enamel furnace
AU520885B2 (en) * 1978-10-17 1982-03-04 Fletcher Challenge Limited Glass melting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559683A (en) * 1949-03-15 1951-07-10 Ferro Enamel Corp Electric enamel furnace
AU520885B2 (en) * 1978-10-17 1982-03-04 Fletcher Challenge Limited Glass melting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2697178B1 (fr) 2011-04-13 2019-09-25 Rockwool International A/S Procédés pour former des fibres vitreuses artificielles

Also Published As

Publication number Publication date
FI902235A0 (fi) 1990-05-04
FI902235A (fi) 1991-11-05
FI85262B (fi) 1991-12-13
AU7742991A (en) 1991-11-27
CA2082147A1 (fr) 1991-11-05
FI85262C (sv) 1992-03-25
EP0527169A1 (fr) 1993-02-17

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