WO2003086999A1 - Rotor de fibrage - Google Patents

Rotor de fibrage Download PDF

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Publication number
WO2003086999A1
WO2003086999A1 PCT/EP2003/003847 EP0303847W WO03086999A1 WO 2003086999 A1 WO2003086999 A1 WO 2003086999A1 EP 0303847 W EP0303847 W EP 0303847W WO 03086999 A1 WO03086999 A1 WO 03086999A1
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WO
WIPO (PCT)
Prior art keywords
wheel
coolant
segment
fiberising
segments
Prior art date
Application number
PCT/EP2003/003847
Other languages
English (en)
Inventor
Weiss Toender Flemming
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 AU2003233971A priority Critical patent/AU2003233971A1/en
Publication of WO2003086999A1 publication Critical patent/WO2003086999A1/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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/18—Formation of filaments, threads, or the like by means of rotating spinnerets

Definitions

  • This invention relates to apparatus for the centrifugal fiberisation of a mineral melt.
  • the melt is poured on to or into a rotating element and is thrown from that element as fibres.
  • a problem with all such elements arises from the high temperature to which they are exposed.
  • the melt temperature is usually at least 1000°C and the combination of high thermal and mechanical stresses tends to cause damage to the element during use.
  • the elements are usually mounted to rotate either about a substantially vertical axis or about a substantially horizontal axis.
  • the element In one simple form where the element rotates about a substantially vertical axis, the element is in the form of a cup into which melt is poured, and fibres are thrown from the rim of the cup as it rotates.
  • An example of such an element is described in US-A-4, 111, 673 in which heat damage is reduced by subjecting the exposed metal surfaces of the cup to a liquid nitriding process.
  • Another type of element which rotates about a substantially vertical axis is one in which the cup has numerous small apertures in its walls, so that the melt is centrifugally extruded through the apertures . Again heat damage of the cup is a potential problem.
  • An extra problem with perforated cups arises from the difficulty of achieving the required circularity of the cup and the difficulty of drilling all the necessary apertures.
  • All these rotary elements tend to be relatively light in weight compared to centrifugal fiberising wheels of the type which rotate about a substantially horizontal axis and wherein mineral melt is poured on to the outer surface and thrown off this centrifugally as fibres.
  • the melt which is fiberised on such wheels is typically a stone or other melt having a melt temperature which is typically at least 1400°C and so again there is the combination of damage due to mechanical and thermal stresses.
  • the fiberising surface is formed of ceramic elements which are formed on an inner cylinder, with the elements typically being secured by soldering or rivets .
  • any small gaps between the ceramic elements and the inner cylindrical support should be packed with a compressable insulating material such as ceramic fibres. This packing of fibres into any gaps that may exist between the elements and the inner cylinder was designed to minimise the risk of heat being conducted inwardly from the outer fiberising surface. This uncooled system has not been adopted.
  • a cooled centrifugal fiberising wheel In practice the normal construction of a cooled centrifugal fiberising wheel comprises an outer fiberising cylinder having an outer fiberising surface on to which mineral melt may be poured and off which fibres are formed centrifugally, an inner cylindrical support mounted for rotation with the cylinder and a coolant zone between the fiberising cylinder and the cylindrical support.
  • the wheel is closed on its radial front and rear faces and inlet and outlet means are provided for supplying and withdrawing coolant from the annular coolant zone.
  • the outer surface temperature of a water-cooled wheel being used for typical stone melt is influenced predominantly by the thickness of the wheel and the conductivity of the material from which it is formed, and therefore the choice of this material .
  • the surface temperature of the steel wheel is typically around 625°C when the wheel is 25mm thick or around 800°C when the wheel is 50mm thick.
  • a layer of solidified melt (“freeze lining") forms on the wheel and adheres strongly to it provided the surface temperature of the wheel is sufficiently high. This solidified layer merges outwardly with fluid melt and the fiberisation from such a wheel is fiberisation of mineral melt which is being thrown off this mineral solid layer.
  • EP-A-0, 085, 644 describes a cooled centrifugal fiberising wheel of this type which has a heat resistant coating.
  • the front radial face is integral with the outer cylinder.
  • An inlet coolant passage leads axially through the rear face and the inner cylinder and then radially outwardly to an annular coolant zone between the inner and outer cylinders and discharges through the rear face, and thereby cools the outer fiberising surface.
  • the fiberising surface of fiberising wheels is usually substantially smooth, but there have been some proposals to provide surfaces in which holes or other recesses are drilled into them, for instance in US-A-2 , 428 , 810 and, for a cooled rotor, in EP-A-717, 725. However these tend to be extremely difficult to manufacture and again have not been adopted widely.
  • a cooled wheel which could operate at higher surface temperatures, for instance up to around 950 or 1000°C, and yet which was easy to manufacture and was cost effective. It would also be desirable to provide a cooled wheel where repair of a damaged wheel is more easily or more cost effectively conducted than the present requirement to remove and scrap the entire wheel. In particular it would be desirable to be able to recycle the worn material .
  • a cooled centrifugal fiberising wheel comprises an outer fiberising cylinder having an inner face and an outer surface which is a fiberising surface on to which mineral melt may be poured for centrifugal fiberisation, an inner cylindrical support mounted for rotation with the fiberising cylinder, an annular coolant zone between the inner face of the fiberising cylinder and the cylindrical support, substantially closed front and rear radial faces, coolant inlet means for leading coolant through at least one of the radial faces into the annular coolant zone and coolant outlet means for discharging coolant through at least one of the radial faces from the annular coolant zone, and in this wheel the inner cylindrical support comprises first mounting means for the releasable mounting of axially extending segments, and the outer fiberising cylinder is formed of a plurality of axially extending segments wherein each segment comprises an outer surface and an inner face and axially extending sides, and the segments are releasably mounted on the mounting means in side-by-side relationship whereby the outer surfaces of the segments define
  • Forming the fiberising surface from segments mounted on an inner cylinder allows coolant to cool the inner faces of the segments. It is essential to have uniform cooling as otherwise variations in surface temperature will cause problems during use. Uniform distribution of coolant over these faces (so as to obtain uniformity of temperature) can be achieved by appropriate construction of the inner cylindrical support and the arrangement of the means for mounting the segment on the support .
  • the inner cylindrical support can be an apertured cylinder which carries the first mounting means, but generally the wall of the cylinder is solid and the inlet means pass through defined passages in the closed cylinder so as to lead into the annular coolant zone .
  • the fiberising cylinder is formed from relatively small segments, the need to make the cylinder by casting a large blank and machining it is eliminated. Because the segments are small, they can be made easily by any convenient technique, for instance casting.
  • the segments can be of homogeneous construction and are replaced without replacing the remainder of the wheel, when the segments are replaced they can be recycled by melting and recasting into fresh segments . Accordingly the material costs for maintaining a wheel can be greatly reduced, even though the alloy of which the segments is made may initially be much more expensive than conventional carbon steel .
  • the segments can be cast or otherwise formed with more complex shapes than are normal for machined fiberising wheels, for instance they can have guides cast into part of their surface to impose a tangential component to air flow over the segments .
  • the annular coolant zone in the invention is usually shallower than in conventional cooled wheels and typically may occupy less than 30% or 40%, for instance 5 to 20%, of the radius of the inner face of the fiberising cylinder, whereas in prior systems such as in WO88/06146 the annular zone is deeper.
  • the inlet means comprise a plurality of inlet passages discharging into the annular coolant zone and preferably there is at least one inlet passage discharging into the zone between each individual segment and the cylindrical support. Often there are at least two such inlets, one adjacent to each side of each segment. Accordingly, the mounting means for the segments, which are often positioned along the centre of the segment, do not interfere with the access of coolant to the entire inner face of the segment.
  • outlet means preferably comprise a plurality of outlet passages from the coolant zone, and preferably at least one outlet passage leads from between each individual segment and the cylindrical support.
  • the coolant should enter through one face and leave through the other.
  • the coolant preferably enters through the rear face.
  • the wheel is, when mounted in a spinner, mounted for rotation on a substantially horizontal axle extending rearwardly through one face, and it is this face which is the rear face.
  • the coolant enters from the rear of the wheel and leaves through the front of the wheel, in practice into the cloud of fibres which is blown forwards from the wheel.
  • the coolant is usually water and the amount of water in the annular chamber can be controlled by appropriate radial positioning of the outlet passages.
  • each outlet is positioned radially inwards by a short distance x. Liquid water will be thrown centrifugally against the inner face of the outer cylinder and some will boil off as steam.
  • the size of x controls the depth of liquid coolant in the cylinder, since liquid coolant will overflow inwardly through the outlet passages.
  • x is less than 15mm, for instance 3 to 10mm.
  • Improved cooling of the outer surface can be achieved by providing a plurality of axially extending grooves in the inner face of each segment, in which event x is measured from the bottom (i.e., radially outermost part) of each groove .
  • the coolant can be air, especially when the wheel is being used for relatively low melt rates, in which event it is desirable to provide such grooves and to make them as deep as practicable.
  • strips of conductive material may be set in the segments so as to conduct heat axially along each segment away from the zone where the melt covers the wheel, thereby improving cooling. If the segments are to be recycled by melting, it is necessary to separate the conductive material from the remainder of the material. For instance, the conductive material may have lower melting point than the remainder of the material, and this can facilitate separation.
  • the front and rear radial faces of the wheel are usually substantially entirely closed so as to prevent unwanted ingress of fibre or other material into the body of the wheel.
  • the substantial closure is provided by the axle on which the wheel is mounted for rotation and elements that can be considered to be radial plates. These plates may be flat or they may be of more complex shape.
  • the radial plate on the front face may include means for spraying binder or other additives coaxially forward from the wheel .
  • each segment is slidably mounted on the inner cylindrical support and is held locked against sliding removal by the face plates, so that removal of at least one of the face plates then allows slidable removal of the segments.
  • the inner cylindrical support is usually a solid steel or other metal cylinder with mounting means for the segments on its outer surface, and the annular coolant zone is then the zone between this outer surface and the inner face of the fiberising cylinder.
  • each segment having an upper axially extending body the outer surface of which provides the fiberising surface of the fiberising cylinder and the inner face of which provides the inner face of that cylinder, and stem means which extend radially inwards from the body of the segment and which terminate in second mounting means, and wherein these second mounting means on the cylindrical support provide for the releasable mounting of the segments by engagement with the first mounting means on the cylindrical support.
  • the first mounting means preferably comprise axially extending grooves, since this allows each segment to be released as a result of sliding the segment, including its stem means and mounting means, axially along the groove. It is usually desirable for the radial thickness of the segments to be relatively thin, for instance 8 to 50mm, often around 15 to 35mm. It is necessary that the segments should have adequate physical strength even when they are thin, and it is desirable to provide at least one axially extending rib along each segment to strengthen it .
  • the stem means can be in the form of such a rib. Accordingly in the preferred construction the stem means is a web which extends axially over substantially the entire length of the segment and which extends radially from the body of the segment down to the second mounting means .
  • This web may be continuous along its entire length and depth. If all the segments are provided with such a web, they will divide the annular coolant zone into a plurality of separate, axially extending, coolant chambers in side- by-side relationship. It is then necessary that at least one coolant inlet passage and at least one coolant outlet passage is provided in each of these side-by-side coolant chambers. In practice it is usually necessary to provide two inlets and, often, two outlets, one associated with each of the adjacent segments which define each coolant chamber. Instead of having complete webs, the webs can be provided with one or more apertures through them to allow some fluid inter-connection between adjacent coolant chambers.
  • the second mounting means on the web or other stem means generally comprise a lateral extension across the lower end of the web, with the extension generally extending out from each side of the web, for instance as a swallowtail.
  • the first mounting means are correspondingly shaped axially extending grooves in the outer surface of the inner cylindrical support and provide a sliding fit for the lateral extension.
  • the wheel will, in practice, be assembled at ambient or other relatively low temperatures and it will be used at very high temperatures, and thus thermal expansion will occur. This can be allowed for merely by designing the segments such that they fit loosely at ambient temperatures and relatively tightly at high temperatures so as to provide a continuous cylindrical fiberising surface.
  • each segment has a peripheral width of 10 to 200mm, generally around 30 to 100mm, and it is often desirable to provide a gap (when cold) of 0.3 to 4mm, often around 0.5 to 3mm, between the adjacent outer edges of each segment.
  • the precise gap for any particular construction depends on the dimensions of the segments and the thermal expansion of the material from which they are formed. For instance, when a segment has a peripheral width of 20 to 50 ⁇ m, a gap of around 0.5 to 1.2mm is suitable with some materials, such as cobalt alloys.
  • the provision of the gap has the disadvantage that it gives the opportunity for fibre and other unwanted residues to enter the coolant chamber and to contaminate this, these problems being particularly acute during start-up before the wheel has achieved full working temperature.
  • This overlapping conveniently is provided by at least one flange on the side of at least one segment of each pair and which overlaps the adjacent side of the other segment.
  • each segment has a skirt extending radially downwards from each of its sides since this provides further control on the flow of coolant and/or each can serve as an axially extending rib to provide strengthening of the segments.
  • the flange should be along the skirt at or near its bottom edge.
  • the flange should be constructed to prevent ingress and egress of material predominantly before the wheel achieves its full working temperature. When the wheel reaches this temperature, there is engagement between the outer top edges of the segments . It is necessary to ensure that expansion of the segments results in a substantially continuous fiberising surface (although solidified melt will fill in any minor gaps between adjacent segments) without causing distortion of the desired truly cylindrical confirmation of the surface. At this stage, there may be no overlapping between the segment sides when the segments have expanded, because the expansion of the outer surface may cause a slight widening of the separation between the bottom edges of the skirts.
  • Each wheel is preferably constructed from an even number of segments (often 6 to 24, preferably 12 to 18) .
  • Each wheel usually has a diameter of 100 to 450mm, preferably 150 to 400mm.
  • each segment is typically 70 to 250mm, often 100 to 200mm, and the melt usually spreads over a zone which is about the central third of the segments axial length.
  • An advantage of the invention is that, because the segments can be relatively thin in the radial direction, they can be made in a cost-effective manner from any convenient material, irrespective of whether it is a ceramic, a metal/ceramic, a high temperature alloy such as a cobalt alloy or a more conventional alloy such as steel.
  • the ability to provide good water cooling and to allow for expansion, all as discussed above, widens the choice of materials and minimises the risk of macroscopic cracking or phase separation or other microscopic cracking.
  • each segment Machining is no longer required and, because the segments are small, it is possible to cast each segment to an accurate shape and surface effect, with little or no machining being required.
  • all segments should be cast in identical manner, i.e., with the same orientation in the casting block in which they are formed.
  • the fiberising surface of each segment is smooth over its entire area but it is possible to cast any desired shape into part of the fiberising surface. For instance it is normal to provide guided flows of high velocity air over the fiberising surface and usually this is achieved by forcing the air through or across directional guides before the air reaches the fiberising surface.
  • guides and other profiled effects can be cast into the fiberising surface, usually only in the part of the surface adjacent to the rear face of the wheel, for instance the rear quarter of the surface.
  • the segments can be formed of carbon steel or any conventional steel, it is particularly preferred that they are formed of a high temperature alloy such that it is now possible easily to operate with a wheel surface temperature of above about 800°C, but wherein there is still a layer of solidified melt permanently on the wheel during spinning.
  • the surface temperature is around 800 to 1000°C, preferably around 900 to 980°C.
  • Conventional cobalt alloys are readily available which, when provided to a thickness of about 25mm between water coolant and mineral melt, will provide such surface temperatures.
  • Typical cobalt alloys for this purpose are the high temperature cobalt alloys known as MAR-M302 and 509 or Stelite 21.
  • such alloys typically contain at least 50% cobalt (generally 55 to 62%) at least 20% chromium (usually 22 to 30%), 1 to 10% nickel, 0 to 7% molybdenum, 0 to 5% tantalum, 0 to 10% tungsten, 0.1 to 3% carbon, with the maximum amount of iron usually being 1.5% with minor amounts (typically below 1.5%) of optional elements such as manganese, silicon, and boron.
  • the invention not only simplifies and reduces the cost of the equipment but also allows for improved product quality.
  • Another advantage is that even when replacements are required, it is not necessary to replace the entire wheel and instead it is merely necessary to remove one of the radial faces, slide off either the entire set of segments or solely the damaged segments, and replace them with new segments. Accordingly this facilitates repair of the wheel irrespective of whether it is made of conventional steel or of a high temperature composite or alloy.
  • the invention also provides a spinner for fiberising a mineral melt comprising at least one of the novel wheels mounted for rotation on a substantially horizontal axle extending rearwardly through the rear face of the wheel .
  • the spinner may only comprise one wheel but usually it comprises at least two wheels. These may be arranged as shown in, for instance, JP-A- 62/182133.
  • the spinner is a cascade spinner comprising a first wheel and one or more subsequent wheels each mounted for rotation about different substantially horizontal axes and arranged such that melt poured on to the first wheel is thrown on to the or each subsequent wheel in turn and is thrown off the subsequent wheels (and optionally also off the first wheel) as fibres.
  • a cascade spinner can have, for instance, three wheels or five wheels but preferably it has four wheels.
  • Generally means are provided for discharging an air blast close to and substantially parallel to part or all of the fiberising surface of each wheel and this air blast may have a tangential direction imposed on it either by direction means behind the wheel or by direction means moulded into the surface of the segments.
  • a typical arrangement of a cascade spinner and direction means is describes in WO92/06047.
  • one or more (and preferably all) of the subsequent wheels are segmented wheels according to the invention. Since the first wheel is slower and smaller, it may be made by conventional techniques or it may be segmented according to the invention.
  • Figure 1 is a perspective view of a wheel according to the invention with a part broken away
  • Figure 2 is a perspective view of the cylindrical support of Figure 1 carrying a single segment
  • Figure 3 is a vertical cross section on the line III- III in Figure 2.
  • the fiberising wheel 1 comprises an outer fiberising cylinder 2 having an inner face 3 and an outer fiberising surface 4.
  • the wheel also comprises an inner cylindrical support 5 mounted on an axle 6 for rotation with the cylinder 2.
  • Front face 8 is closed by a plate 10 which mates with the axle 6 essentially to close the front face 8, and a conical plate 12 having a central opening 11 is provided over the front face plate 10 to allow for the discharge of binder through orifice 11, the binder being pumped in conventional manner along axle 6 and discharged through the front face into the fibres that are being blown forward from the wheel.
  • a rear face plate 13 mates with the axle 6 to close the rear face.
  • the outer fiberising cylinder 2 is formed of a plurality of segments 14. Each segment has an outer surface which becomes part of the outer surface 4 of the total cylinder and an inner face which becomes part of the inner face 3 of the outer cylinder. As shown, the inner face does not have to be truly cylindrical but may have a more complex shape.
  • Each segment has a web 34 extending along its length terminating in lateral extensions 15 and 16 on each side of the web 34 and these lateral extensions make a sliding fit with correspondingly shaped grooves 17 arranged around the outer face of the inner support cylinder 5.
  • the web 34 may be continuous or it may have an opening, as shown at 18 in Figure 1, to allow fluid interconnection between the chambers formed between the webs of adjacent segments.
  • Each segment has skirts 19 and 20 extending downwardly from its side edges 35, the skirts and the web thus defining an axially extending recess 31 in the inner face of the outer cylinder. Thus these recesses 31 are part of the inner face 3 of the outer cylinder.
  • a peripherally extending flange 21 extends outwardly from the skirt 20 on each segment and the skirt 19 of the adjacent segment is overlapped by this flange 21.
  • Skirt extends downwardly across the end faces of the segments as well as along the side edges and the skirt 28 at the front face carries recesses 29.
  • the front face plate 10 has a radius the same as the radius defined by the bottom of the skirt 28 and thus these recesses 29 constitute outlet passages from which coolant overflows outwardly from the front face.
  • This overflow may be under considerable pressure, for instance due to evaporation of water within the recess formed by the skirts and the remainder of the segmen . Accordingly the overflowing coolant may be sprayed forward as a mixture of steam and water.
  • the depth of the recess 31 is usually only a few millimetres and, as shown, the total depth of the annular coolant zone (including the recesses) can be quite shallow, for instance being only around 10% (in the drawings) of the inner radius of the inner face of the segments.
  • Each segment is locked in position by engagement at its rear end 32 with the rear face plate 13 and at its front end by engagement between the rim of the plate 10 and the front face 33 of the web.
  • the wheel can be assembled merely by sliding the individual segments on to the inner cylindrical support and locking them in position by clamping the plates 10 and 12 on to the front face of the wheel.
  • the plates 10 and 12 are removed and the relevant segments are merely slid off the cylindrical support and replaced.
  • a preferred spinner is constructed as described in WO92/06047.
  • the second rotor typically has a diameter of 200 to 300mm and typically is formed of twelve of the defined segments, whilst the third and fourth rotors typically have diameters of 300 to 400mm and typically are formed of eighteen of the defined segments.
  • the first rotor may also be formed of segments or, since it is smaller (typically around 150mm) and rotates more slowly it can be cast as a single element.
  • the segments, and preferably also the first wheel are made of Stelite 21 cobalt alloy and the wheels preferably operate with a surface temperature of around 900 to 950°C.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

Cette invention concerne une roue (1) de fibrage centrifuge refroidie comprenant un support (5) cylindrique interne et un cylindre (2) de fibrage externe composé de segments (14) qui s'étendent axialement et sont montés amovibles sur le cylindre interne (5) et comprenant également un passage (7) de refroidissement annulaire servant au passage du liquide de refroidissement entre le support (5) cylindrique interne et les segments (14) amovibles.
PCT/EP2003/003847 2002-04-17 2003-04-14 Rotor de fibrage WO2003086999A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003233971A AU2003233971A1 (en) 2002-04-17 2003-04-14 Fiberising rotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02252712.1 2002-04-17
EP02252712 2002-04-17

Publications (1)

Publication Number Publication Date
WO2003086999A1 true WO2003086999A1 (fr) 2003-10-23

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PCT/EP2003/003847 WO2003086999A1 (fr) 2002-04-17 2003-04-14 Rotor de fibrage

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AU (1) AU2003233971A1 (fr)
WO (1) WO2003086999A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700027044A1 (it) * 2017-03-10 2018-09-10 Qd S R L Rotore per la produzione di fibre da un materiale fuso e apparecchiatura comprendente detto rotore

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609708A1 (fr) * 1987-01-21 1988-07-22 Fibraconsult Management Beratu Dispositif pour la fabrication de fibres a partir d'une masse minerale fondue

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609708A1 (fr) * 1987-01-21 1988-07-22 Fibraconsult Management Beratu Dispositif pour la fabrication de fibres a partir d'une masse minerale fondue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700027044A1 (it) * 2017-03-10 2018-09-10 Qd S R L Rotore per la produzione di fibre da un materiale fuso e apparecchiatura comprendente detto rotore

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AU2003233971A1 (en) 2003-10-27

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