WO1998035916A1 - Procede et appareil de production des fibres vitreuses synthetiques - Google Patents

Procede et appareil de production des fibres vitreuses synthetiques Download PDF

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Publication number
WO1998035916A1
WO1998035916A1 PCT/EP1998/000274 EP9800274W WO9835916A1 WO 1998035916 A1 WO1998035916 A1 WO 1998035916A1 EP 9800274 W EP9800274 W EP 9800274W WO 9835916 A1 WO9835916 A1 WO 9835916A1
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WO
WIPO (PCT)
Prior art keywords
melt
outlet
outlets
furnace
spinning
Prior art date
Application number
PCT/EP1998/000274
Other languages
English (en)
Inventor
Leif Trier Jensen
Thomas Heldgaard
Original Assignee
Rockwool International A/S
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 Rockwool International A/S filed Critical Rockwool International A/S
Priority to AU62112/98A priority Critical patent/AU6211298A/en
Publication of WO1998035916A1 publication Critical patent/WO1998035916A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
    • C03B37/05—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor by projecting molten glass on a rotating body having no radial orifices
    • C03B37/055—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor by projecting molten glass on a rotating body having no radial orifices by projecting onto and spinning off the outer surface of the rotating body
    • 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
    • C03B5/265—Overflows; Lips; 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
    • C03B5/28—Siphons
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the invention relates to processes of producing man- made vitreous fibres (MMVF) and to an assembly for carrying out these processes.
  • MMVF man- made vitreous fibres
  • melts In standard systems for MMVF production the melt is formed in a furnace.
  • the furnace is usually charged with solid mineral materials, which are then heated to form a melt.
  • the melt then exits the furnace and is led to the spinner.
  • a single furnace provides the melt for a single spinner.
  • the provision of an additional furnace for each additional spinner results in a large increase in the amount of energy required for the process and would require investment in large amounts of new equipment at huge cost.
  • compositions of melts exiting the furnaces may not be identical and as a result the compositions of fibres formed on different spinners may not be the same.
  • a particular disadvantage of this known furnace is its tendency to give uneven melt flow rates, in particular widely differing melt flow rates from the two outlets.
  • the pressure is greater than atmospheric pressure. The excess pressure forces the melt out of the furnace. If one of the outlets should become slightly blocked and suffer a decrease in the flow rate of melt through that outlet, the pressure in the furnace does not diminish. This results in flooding of melt out of the other outlet. Highly uneven flow of melts from the two outlets arises.
  • a furnace for melting mineral material which is designed to maintain in the furnace during melting a pressure greater than atmospheric pressure and which comprises a furnace wall which defines the space in which a melt is formed from charged mineral material and at least two outlets in the furnace wall through which melt can pass to the exterior, and in which at least one of the outlets is an adjustable outlet which comprises flow control means capable of modifying the flow rate of melt through that outlet,
  • at least two spinning apparatuses which each comprise a rotor which is capable of spinning rapidly so as to fling melt poured onto or into the rotor from it centrifugally as fibres, and
  • This assembly has the advantage that it provides two or more spinning apparatuses (spinners) which are fed from the same furnace. Consequently, melt composition can be consistent on all spinners. Because each spinner is fed from a single furnace outlet, the pathway from the furnace to the spinner is direct and can be made as short as possible. For instance the furnace can be located between the spinners. This alleviates the problem of cooling of the melt after it exits the furnace and allows the required high temperature to be maintained at the spinner. Further, the disadvantages of known multiple-outlet furnaces are also alleviated by the provision of the at least one adjustable outlet.
  • the flow control means of the adjustable outlet can be used to modify the flow rate of melt through that outlet instantaneously, so as to avoid or reduce flooding until the flow of melt through the other outlet is adjusted. Consequently the flow rates of melt to the spinners can be maintained constant relative to one another throughout the process of producing the fibres.
  • the fibres produced on the spinners can therefore be controlled to provide mineral fibre of substantially identical quality and in substantially identical quantities.
  • an outlet can be any arrangement which allows melt to pass to the exterior.
  • a preferred outlet is one which comprises a lip over which melt flows to reach the exterior.
  • This lip can for instance be provided by a lower outlet wall which is angled with respect to the furnace wall and protrudes therefrom. The lip is provided by the upper, free end of this angled lower wall, the lower end being connected with the furnace.
  • a preferred outlet type is of the type known as a siphon-type outlet. In such an outlet the lip height is above the level of the surface of the melt in the furnace. In use, the excess pressure in the furnace provides a "head" which forces the melt up to the height of the lip. The melt overflows the lip and passes to the exterior of the furnace.
  • Such outlets are known and are described in for instance US 4,057,231 for use in steel making furnaces, for instance in Figure 4 of that document.
  • ⁇ p p.g.h + k.v + (pv ) in which ⁇ p is the excess pressure, p is the density of the melt, g is acceleration due to gravity, h is the difference in height between the surface of the melt in the furnace and the lip, v is the rate of flow of melt over the lip and k is a constant.
  • ⁇ p the excess pressure
  • p the density of the melt
  • g acceleration due to gravity
  • h the difference in height between the surface of the melt in the furnace and the lip
  • v the rate of flow of melt over the lip
  • k is a constant.
  • the excess pressure ⁇ p is constant, thus if any of the variables changes, for instance the constant k relating to the viscous resistance, the flow velocity v will tend to change to compensate.
  • the height h of the lip can thus be adjusted to rectify the situation.
  • a siphon outlet the part of the furnace wall above the outlet forms an upper limit on the outlet.
  • the lip may be provided higher than or lower than or at the same height as this upper limit.
  • the pressure forcing the melt over the lip is high enough to ensure that the melt stream contacts the upper limit of the outlet, so that there is no air gap through which gases may flow into and out of the furnace.
  • the lip if it is below the upper limit of the outlet formed by the furnace wall, must not be so far below it that such a gap exists.
  • a particular advantage of the invention lies in the fact that certain standard outlets can be modified to form adjustable outlets without major remodelling of the outlet. For instance a simple sliding plate may be used in combination with a simple outlet such as a pipe or orifice.
  • the melt flows through the outlet to the exterior over a lip. Modification of the flow rate of the melt is carried out by adjustment of the height of this lip.
  • a siphon-type outlet having an angled lower wall of which the upper end forms the lip, this may be designed so that the entire outlet, or at least the lower wall, is pivotable. As the outlet or lower wall pivots the vertical height of the upper end of the lower outlet wall is varied. Thus for instance if flooding through an adjustable outlet occurs, the outlet can be pivoted so as to increase the height of the upper end of the lower outlet wall. ' Flow is thus reduced. Alternatively, if it is desired to increase flow through such an adjustable outlet, pivoting can be induced so as to reduce the vertical height of the upper end of the lower outlet wall.
  • Such an adjustable outlet is described in the context of a single-outlet furnace for purposes other than production of MMVF in DE 2,610,333. Pivotable outlets of this type can be used in the present invention. Alternative outlets which rely on adjustment of the vertical height of the overflow lip and which can be used in the invention are described in US 3,348,937 (for use with molten glass) . Such outlet configurations can be effective within the assembly of the invention.
  • a preferred adjustable outlet comprises a weir gate which lies in contact with the lower outlet wall along its length and is moveable parallel to the wall towards and away from the upper end.
  • This system is particularly convenient, at least in part because existing furnace outlets of the siphon type can be modified by the provision of a single weir gate.
  • a weir gate is particularly useful because it is simple and economical to provide and to maintain and can give rapid reaction to changes in flow rate.
  • the weir gate may be provided on the side of the lower outlet wall on the exterior or the interior of the furnace. Preferably it is provided on the exterior.
  • the top edge of the weir gate is at a height lower than that of the upper end of the lower outlet wall. If flooding through the adjustable outlet occurs, the weir gate can be moved, parallel to the lower outlet wall and in contact with it in a sliding fashion towards the upper end of the lower outlet wall. With sufficient movement the top edge of the weir gate reaches a vertical height greater than that of the upper end of the lower outlet wall. This top edge then forms the lip over which the melt flows. This top edge can be raised to whichever height is necessary to reduce the flow of melt from that outlet to a sufficient degree.
  • the weir gate can be slid in the opposite direction, away from the upper end of the lower outlet wall, so as to reduce the height of the lip over which the melt flows.
  • the weir gate and any plates or other devices used as flow control means for modifying the flow rate of melt through the adjustable outlet may be made of any suitable material, for instance iron, refractories, steel and steel alloys. If necessary, these parts of the apparatus, together with any other elements forming the outlet, adjustable or otherwise, may be cooled in any suitable manner. For instance they may be water-cooled.
  • the furnace may possess outlets of which all are adjustable. Alternatively specific outlets may be chosen to be adjustable. In preferred systems not more than one outlet is non- adjustable, and more preferably all outlets are adjustable. Preferably each adjustable outlet is adjustable independently of all other outlets.
  • Adjustment is usually done manually, as a result of observations by the operator of the furnace and spinners.
  • the adjustment of one or more outlets may be controlled automatically, in response to increase or decrease in flow through any of the outlets.
  • Control of the outlets may be designed so that each outlet is controlled individually with a local control loop.
  • the flow from each outlet is monitored individually so that on increase or reduction of flow from that outlet adjustment of the outlet can be carried out so as to increase or decrease the flow through that outlet as required.
  • the flow through an outlet may be measured by any suitable means, for instance by measuring the consumption of electrical energy on the corresponding spinner.
  • the furnace has at least two outlets. Each outlet feeds a single spinning apparatus.
  • a furnace having 3, 4 or more outlets, feeding a corresponding number of spinners, but it is not usually necessary to use more than two outlets and two spinners.
  • the furnace has two outlets of which one is adjustable, although it is possible to use a furnace in which both outlets are adjustable.
  • the combination of types of outlet may be chosen as required. It is possible to use furnaces having outlets of different types. Usually however all outlets are of basically the same construction, with the adjustable outlets having modifications to provide flow control means which enable variation of the flow rate of melt through these.
  • the furnace used in the assembly of the invention comprises a wall which defines the space in which the melt is produced. Raw materials are charged to the furnace through a charge inlet, normally positioned in the upper half of the furnace wall. As the charge is heated a melt forms and molten material trickles down through the charge to form a pool of melt in the lower half of the furnace in the interstices between the pieces of coke carrying the charge. This melt can then exit the furnace through the outlets.
  • the outlets are normally provided in the same position as in standard furnaces.
  • the temperature in the bottom of the furnace is normally from 1,300 to 2,3O0°C, to provide a melt exiting the outlet having a temperature of from 1,300 to 1,700°C.
  • Pressure in the furnace is above atmospheric pressure. Often it is at a pressure of at least 1.03, often at least 1.05 times atmospheric pressure.
  • Suitable furnaces often operate at pressure up to 1.1 times atmospheric pressure.
  • Particularly suitable furnaces are cupola furnaces. In a cupola furnace increased pressure is supplied by air blasted in at the base of the furnace through tuyeres. The air, together with some waste products, passes out through an exhaust outlet at the top of the furnace.
  • the system may also be applied to furnaces which are not designed to maintain a pressure greater than atmospheric pressure.
  • furnaces which are not designed to maintain a pressure greater than atmospheric pressure.
  • it can be applied to tank furnaces.
  • a process of producing man-made vitreous fibre comprising (1) providing a furnace which comprises a furnace wall which defines the space in which a melt is formed from charged mineral material and at least two outlets in the furnace wall
  • any of the furnaces described for use in the assembly are suitable.
  • This channel may be a suitable means of conveying melt, such as a trough or pipe and may be made of any suitable material, for instance iron and/or refractories, which may each be cooled with water.
  • the route taken by the channel along which the melt is led to the spinning apparatus should be as direct as possible between the outlet and the spinning apparatus. Preferably it is substantially straight.
  • each spinning apparatus is situated in a separate spinning chamber. Fibres produced for each spinning apparatus are collected, normally on a collecting belt, in the relevant chamber and taken to a transport system for cross-lapping. The several fibre fleeces thus produced are then sent to a single line in which they pass through a single curing oven, cooling zone and cutting stations etc as normal.
  • the flow rate of melt out of at least one of the outlets is adjusted independently of the flow rate out of other outlets. This is done in any of the ways described for the assembly of the invention. By doing this it is possible to maintain the ratios of flow rate from the outlets at substantially constant values throughout the process of producing the mineral fibres. In the process it is inevitable that there will be very short periods of fluctuation in these ratios when for instance a blockage to one of the outlets comes about. However, in the invention the ratios of flow rates are modified rapidly using the adjustable outlets so that during substantially all of the operation of the process these ratios remain substantially constant.
  • substantially constant we mean that the ratios remain within 5% of a predetermined value, that is an optimum ratio is determined between the rates of flow out of any pair of outlets at a value x, and the ratio is not less than 95% of x and not more than 105% of x. Preferably they each remain within 2% of their predetermined value.
  • the process and assembly of the invention may be used for producing mineral fibres in processes where different melt flow rates from the outlets are required, ie the ratio is not 1:1. For instance, if two outlets are provided, the melt flow rate from one outlet may be set at 80% of the melt flow rate from another, ie the ratio between the melt flow rates is 1.25. The ratio between the two outlets may vary from for instance 0.5 to 2.
  • the invention is particularly useful in processes where it is required to maintain substantially identical flow rates of melt through all outlets in the furnace. Thus substantially identical rates of melt flow into the spinning apparatuses are maintained. In this specification, by “substantially identical”, we mean that the flow rates of melt remain within 5% of each other.
  • the rate of melt flow from one outlet is taken as reference, the rate of flow from each of the other outlets is not more than 105% of that rate and not less than 95% of that rate. Preferably they remain within 2% of each other.
  • the rate of flow from each of the other outlets is not more than 105% of that rate and not less than 95% of that rate. Preferably they remain within 2% of each other.
  • the spinning apparatuses may each be any known apparatus for the production of mineral fibre.
  • a suitable spinner is of the spinning cup type which is mounted for rotation about a substantially vertical axis and which has apertures in its walls through which fibres are extruded as the cup rotates rapidly.
  • a spinning cup type of spinning apparatus may be used to produce stone wool fibres or glass wool fibres. It is particularly suitable for production of glass wool fibres.
  • One or more of the spinners may alternatively be of the type which comprises a fiberising rotor mounted about a substantially horizontal axis.
  • the melt is poured onto the periphery of the rotor and flung from it centrifugally as fibres as the rotor rotates.
  • the fibres are formed using a cascade spinner comprising a first rotor onto which melt is poured and off which it is thrown centrifugally and at least one subsequent rotor onto which the melt is thrown from the preceding rotor and off which fibres are thrown and wherein each of the rotors rotates about a substantially horizontal axis.
  • a cascade spinner comprising at least three, and particularly four rotors in total is preferred.
  • Spinners of this type are particularly suitable for the production of stone wool.
  • the furnace has two outlets, each of which is connected by a channel to a cascade spinner to which the melt is led and the charge of mineral material provided to the furnace is such that the melt is suitable for production of stone wool fibres.
  • the MMVF materials produced can be used as, for instance, fire, heat or sound insulation or protection, as an agricultural growing medium, as a filler, as reinforcement or for other conventional MMVF purposes.
  • Figure 1 shows a schematic plan view of a reference assembly, not arranged according to the invention.
  • Figure 2 shows a schematic plan view of an assembly according to the invention. '
  • Figure 3 shows a vertical cross-section through adjustable outlet 4 of Figure 2.
  • Figure 1 shows a scheme which we have used in the past for producing mineral fibre, in which two spinners are used simultaneously.
  • mineral material having an overall composition suitable for the production of stone wool is charged to the cupola furnace 1.
  • the melt exits the furnace through outlet 3 and passes along a channel down the path 10 to a balance trough 11.
  • the balance trough splits the stream of melt so that it passes along both paths 12 and 13.
  • the two melt streams are then channelled to spinners 7 and 8 which are situated in a single spinning chamber 5.
  • Both spinners 7 and 8 are of the cascade type. This system is suitable only for providing melt streams for two spinners which are very close together, for instance in the same spinning chamber. If these spinners are placed further apart it is necessary for the melt to travel a greater distance after it has been split into melt streams 12 and 13. Lengthening the path along which the melt must travel increases the time available for the melt to cool. If significant cooling occurs between the furnace and the spinner then the viscosity and other properties of the melt are no longer suitable for spinning.
  • Figure 2 shows an assembly according to the invention.
  • this system it is desired to feed spinners 7 and 8, in chambers 5 and 6 respectively.
  • the diameter AB of the furnace is approximately 2 metres.
  • the distance CD between the spinners 7 and 8 is approximately 3.5 metres. It can be seen that if a system such as that shown in Figure 1 were to be used, the melt would have to travel a considerable distance from the furnace to each of the spinners.
  • melt travels from outlets 3 and 4 along channels 10 and 9 respectively, directly to spinners 8 and 7 respectively.
  • the direct, substantially straight pathways EC and FD have length only around 1.5 metres. The difference between this and the path which would be necessary if a system of Figure 1 were to be used is significant in reducing cooling of the melt between the furnace and the spinner.
  • outlet 3 is a standard siphon-type outlet.
  • Outlet 4 is an adjustable outlet. Detail of outlet 4 is given in Figure 3.
  • Figure 3 shows a vertical cross-section through adjustable outlet 4.
  • the outlet is formed from water- cooled housing 13, protected by refractories 14.
  • the surface of the melt 19 is under the superatmospheric pressure in the furnace. This pressure forces the melt through the outlet and to the height of the lip 20.
  • the melt flows over the lip 20 and downwards to the channel 9.
  • the melt level in the furnace will rise since the rate of flow of melt down through the charge will be unaffected. Consequently the flow rate of outlet 4 increases, and the flow rate over the lip 20 is increased.
  • the weir gate 17 can be moved, in this case manually.
  • the weir gate lies in contact with the lower wall 16 of the outlet and is moveable parallel to that wall in the directions X and Y, ie towards and away from the upper end 21 of the lower wall 16.
  • the weir gate 17 is moved in the direction X its top edge 22 eventually attains a greater vertical height than the lip 20.
  • the top edge 22 of weir gate 17 then forms the lip over which melt flows.
  • the height of this lip is increased (as the weir gate is moved further in the direction X) the flow rate of melt through outlet 4 is reduced. As a result the flow rate of melt out of outlet
  • melt streams travelling to spinners 7 and 8 are substantially identical.
  • the qualities and quantities of wool produced by the spinners are therefore substantially identical. It is thus possible to carry out a process in which two spinners operate at reduced capacity and improved quality without the necessity to provide either two furnaces or two spinners in the same chamber.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Fibers (AREA)

Abstract

La présente invention concerne un ensemble et un procédé de fabrication de fibres vitreuses synthétiques utilisant un four (1) qui maintient une pression superatmosphérique pendant la fusion et qui comporte au moins deux orifices de sortie (3, 4) dans sa paroi (2), l'un au moins étant un orifice de sortie (4) réglable qui comprend un élément (17) de régulation d'écoulement capable de modifier le débit du bain de fusion (19) à travers l'orifice de sortie réglable. Deux canaux (9, 10), au moins, sont prévus, chacun reliant l'orifice de sortie à un appareil de filage (7, 8) de sorte que le bain de fusion est dirigé à partir d'un orifice de sortie et le long d'un canal vers un appareil de filage.
PCT/EP1998/000274 1997-02-12 1998-01-20 Procede et appareil de production des fibres vitreuses synthetiques WO1998035916A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62112/98A AU6211298A (en) 1997-02-12 1998-01-20 Method and apparatus for producing man-made vitreous fibres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9702803.9A GB9702803D0 (en) 1997-02-12 1997-02-12 Method and apparatus for producing man-made vitreous fibres
GB9702803.9 1997-02-12

Publications (1)

Publication Number Publication Date
WO1998035916A1 true WO1998035916A1 (fr) 1998-08-20

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PCT/EP1998/000274 WO1998035916A1 (fr) 1997-02-12 1998-01-20 Procede et appareil de production des fibres vitreuses synthetiques

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AU (1) AU6211298A (fr)
GB (1) GB9702803D0 (fr)
WO (1) WO1998035916A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016118788A1 (fr) 2015-01-21 2016-07-28 Axenic Power LLC Système de régulation de matière vitrifiée et procédé

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212847C (fr) *
DE139336C (fr) *
US1391957A (en) * 1920-03-26 1921-09-27 Edward S Hutton Glass-discharging mechanism
FR823694A (fr) * 1937-06-30 1938-01-25 Fr Des Verreries Mecaniques Ch Procédé et appareil distributeur de verre fondu
US2807048A (en) * 1952-12-30 1957-09-24 Johns Manville Apparatus for forming fibers
DE2610333B1 (de) * 1976-03-12 1977-07-07 Hennes Werner Kg Kupolofen mit ausgleichssiphon
DE2729167A1 (de) * 1976-06-30 1978-01-12 Rockwool Ab Vorrichtung zum herstellen von mineralwolle o.dgl. fasergebilden aus einer mineralschmelze
WO1992012940A1 (fr) * 1991-01-16 1992-08-06 Rockwool International A/S Procede et appareil pour fabriquer des fibres de laine minerale

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212847C (fr) *
DE139336C (fr) *
US1391957A (en) * 1920-03-26 1921-09-27 Edward S Hutton Glass-discharging mechanism
FR823694A (fr) * 1937-06-30 1938-01-25 Fr Des Verreries Mecaniques Ch Procédé et appareil distributeur de verre fondu
US2807048A (en) * 1952-12-30 1957-09-24 Johns Manville Apparatus for forming fibers
DE2610333B1 (de) * 1976-03-12 1977-07-07 Hennes Werner Kg Kupolofen mit ausgleichssiphon
DE2729167A1 (de) * 1976-06-30 1978-01-12 Rockwool Ab Vorrichtung zum herstellen von mineralwolle o.dgl. fasergebilden aus einer mineralschmelze
WO1992012940A1 (fr) * 1991-01-16 1992-08-06 Rockwool International A/S Procede et appareil pour fabriquer des fibres de laine minerale

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016118788A1 (fr) 2015-01-21 2016-07-28 Axenic Power LLC Système de régulation de matière vitrifiée et procédé
EP3247679A4 (fr) * 2015-01-21 2018-11-07 Plasma Tech Holdings, LLC Système de régulation de matière vitrifiée et procédé
US10392286B2 (en) 2015-01-21 2019-08-27 Plasma Tech Holdings, Llc Vitrified material control system and method
EP4257560A3 (fr) * 2015-01-21 2024-01-03 Plasma Tech Holdings, LLC Système et procédé de commande de matériau vitrifié

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AU6211298A (en) 1998-09-08

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