EP0527169A1 - Melting furnace for the melting of mineral fibre raw material - Google Patents
Melting furnace for the melting of mineral fibre raw materialInfo
- Publication number
- EP0527169A1 EP0527169A1 EP19910908389 EP91908389A EP0527169A1 EP 0527169 A1 EP0527169 A1 EP 0527169A1 EP 19910908389 EP19910908389 EP 19910908389 EP 91908389 A EP91908389 A EP 91908389A EP 0527169 A1 EP0527169 A1 EP 0527169A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- melting furnace
- melting
- discharge opening
- raw material
- mineral
- 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- Withdrawn
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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI902235 | 1990-05-04 | ||
FI902235A FI85262C (fi) | 1990-05-04 | 1990-05-04 | Smaeltugn foer smaeltning av mineralfiberraomaterial. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0527169A1 true EP0527169A1 (en) | 1993-02-17 |
Family
ID=8530374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19910908389 Withdrawn EP0527169A1 (en) | 1990-05-04 | 1991-05-02 | Melting furnace for the melting of mineral fibre raw material |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0527169A1 (fi) |
AU (1) | AU7742991A (fi) |
CA (1) | CA2082147A1 (fi) |
FI (1) | FI85262C (fi) |
WO (1) | WO1991017125A1 (fi) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK2697178T3 (da) | 2011-04-13 | 2019-12-09 | Rockwool Int | Fremgangsmåder til dannelse af syntetiske glasfibre |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL151861B (nl) * | 1949-03-15 | Ampex | Fasediscriminator. | |
AU520885B2 (en) * | 1978-10-17 | 1982-03-04 | Fletcher Challenge Limited | Glass melting |
-
1990
- 1990-05-04 FI FI902235A patent/FI85262C/fi not_active IP Right Cessation
-
1991
- 1991-05-02 AU AU77429/91A patent/AU7742991A/en not_active Abandoned
- 1991-05-02 EP EP19910908389 patent/EP0527169A1/en not_active Withdrawn
- 1991-05-02 WO PCT/FI1991/000127 patent/WO1991017125A1/en not_active Application Discontinuation
- 1991-05-02 CA CA002082147A patent/CA2082147A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9117125A1 * |
Also Published As
Publication number | Publication date |
---|---|
FI85262C (fi) | 1992-03-25 |
FI902235A (fi) | 1991-11-05 |
FI902235A0 (fi) | 1990-05-04 |
FI85262B (fi) | 1991-12-13 |
AU7742991A (en) | 1991-11-27 |
WO1991017125A1 (en) | 1991-11-14 |
CA2082147A1 (en) | 1991-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3944713A (en) | Method and apparatus for pre-heating vitrifiable batch | |
US5364432A (en) | Method for producing a composite glass body with drawing of concentric melts | |
KR20000029641A (ko) | 광물섬유제조용플랜트에서스크랩을재생하기위한방법및장치 | |
JPH08508462A (ja) | スクラップガラスファイバーのための方法および装置 | |
CN106660854B (zh) | 包括炉、通道和挡板的用于熔化玻璃的装置 | |
JP3051135B2 (ja) | 物質の溶融方法及びその実施装置 | |
EP0527169A1 (en) | Melting furnace for the melting of mineral fibre raw material | |
US3134659A (en) | Glass melting apparatus and method useful for the production of glass fibers | |
FI90654C (fi) | Mineraalivillajätteen tuhoaminen ja käyttäminen uudestaan | |
GB2160009A (en) | Apparatus for the vitrification of fluid highly radioactive wastes | |
US5179902A (en) | Method and apparatus for melting materials containing inorganic material fibers by the supply of oxygen rich gas | |
FI80009B (fi) | Foerbaettringar vid matningen av straeckbart material vid fiberframstaellningsfoerfaranden. | |
US4969940A (en) | Apparatus and method for making mineral wool from coal-ash | |
DE59104639D1 (de) | Schmelzwanne für glas-wannenöfen mit palisadensteinen und betriebsverfahren hierfür. | |
US5186112A (en) | Method and apparatus for melting materials containing inorganic material fibers by the supply of oxygen rich gas | |
WO2022180345A1 (fr) | Régulation de four | |
GB2047678A (en) | Production of glass articles | |
FI97052B (fi) | Menetelmä ja laite mineraalikuitujen valmistamiseksi | |
US3733189A (en) | Method and apparatus for forming glass fibers | |
JP2006143549A (ja) | ガラスの製造方法およびガラス熔融装置 | |
US812619A (en) | Method of preserving the inner walls of furnaces. | |
DE1952908C (de) | Kühlsystem für Schacht-, insbesondere Hochöfen | |
SK140794A3 (en) | Method of manufacture of melt and melting furnace for realization of this method | |
JPH01171630A (ja) | 加熱炉への還元剤粉投入方法 | |
WO1989008619A1 (en) | Shaft furnace with a melt collecting chamber |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19921019 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19930820 |