DE1070791B - Nozzle for shredding melted substances - Google Patents

Description

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FEDERAL REPUBLIC OF GERMANY

UTSCHES

kl 32 a 25 / j0

INTERNAT..KL C 03 Il

PATENT OFFICE

EXPLAINING PUBLICATION 1070 791

C 12406 IVc / 32 a

REGISTRATION DATE: JANUARY 12, 1956

NOTICE
THE REGISTRATION
AND ISSUE OF THE
4 DECEMBER 10, 1959

The invention relates to a Dy ₁ Jj ₁ C for the production of blown, inorganic fibers. Such material is usually produced by directing a stream of gas, such as air or steam, at high speed onto the falling melt stream.

So far, this type of production has been used for blown, inorganic fibers, the stream of molten inorganic material is directed so that it was passed in front of the nozzle, from which the gas flow escaped at high speed. The gas flow So met the melt stream falling vertically, changing its direction of movement to the horizontal and split it into a multitude of molten spheres, which then deformed into fibers. The gas flow had to perform three functions: change the direction of movement of the melting material from the vertical to the horizontal, splitting into individual particles and fiberization of these particles.

The present invention is a nozzle for the production of blown fibers, in which a larger Energy share of the gas is used to fiberize the melting material.

This is achieved according to the invention in that, in known per se, from a tube with inserted existing nozzles on the core adjacent to the pipe, the pipe and the core on the outlet side in the same way Way are beveled, the angle formed by the bevel and the tube axis 20 ° to 70 °, preferably 45 °.

This creates a crescent-shaped nozzle outlet. Such shaped nozzle outlets are per se known, but not with a forward beveled end of the nozzle forming the nozzle together with a core Pipe.

Fig. 1 is a perspective view of the disassembled parts of the nozzle; Figure 2 is a top plan view of the nozzle;

Fig. 3 is a longitudinal section taken along line 3-3 of Fig. 2;

Fig. 4 is the cross-section taken along line 4-4 of FIG Fig. 2;

Figure 5 is the cross section taken along line 5-5 of Figure 2;

Fig. 6 is the cross-section similar to Fig. 4 of a modified embodiment;

Fig. 7 'is the cross section similar to Fig. 4 of a further modified embodiment;

Fig. 8 is the cross section similar to Fig. 5 of a further modified embodiment;

Fig. 9 shows, with a schematic view of a nozzle according to the present invention, the \ ^T erlauf of Verfaserungs process.

The nozzle consists of a nozzle on one side for shredding molten substances

Applicant:

The Carborundum Company, Niagara Falls, N.Y. (V, St. A.)

Representative: Dipl.-Ing. W. Cohausz

and Dipl.-Ing. W. Florack, patent attorneys,

Düsseldorf, Schumannstr. 97

Claimed priority: V. St. v. America January 27, 1955 «

Michael Joseph Auer, Dana Drive Lewiston,

Niagara, N.Y. (V. St. A.), have been named as inventors

open, cylindrical Rohx-10 that is threaded at the other end for connection to a high pressure line. The blowing end of the tube 10 is bevelled λ-orn below, in a winter ^{Jt> lJ} angle of 20 to 70 °, preferably 45 °. (, λ, / A /

Il, which rests against the upper inside of the tube and is firmly held by bolts 12 th ^- d in ear 10 R em is a KGeo. The other end of the core 11 is also beveled downwards at approximately the same angle.

The core cross-section 11 is smaller than the inner cross section of the tube β and forms an outlet opening ^ J "^ * or nozzle 13 of a crescent-shaped cross-section. This cross sectional shape is known per se and is not part of the invention.

The rear end of the core, i.e. H. the end of the core in the tube is on the side facing away from the blow opening sloping forward and down at an angle of 15 to 45 °. Front and back bevel are about at the same angle. The inside of the core can also drop off in another direction, e.g. B. perpendicular to the cylinder axis. The inner surface of the core can be flat, as shown in Figures 3 and 5, or the inner end of the core can have a circular cross-section (Fig. 8) and taper upwards to the tube, so that the conical end part Hr rests on the upper tube part over its entire length.

Between the two core ends, the core and tube preferably have a similar cross-section. For example, as shown in Figs. 1 to 4,

909 688/103

fao ¹ } I tube and core have a round cross-section, the core diameter being slightly smaller than the inner diameter of the tube.

However, as in FIG. 6, the tube can also be round Have cross-section, while the core 11a is a modified one Has a circular shape. The nozzle of Fig. 6 has the advantage that an outlet opening 13a with an enlarged Cross-section results.

According to FIG. 7, the core can also consist of two parts 11 b and 18. This construction yields

ζ'ί \ ,, i / an exit opening 13 b with a uniform opening. Tube and core can also have other shapes

fogT ~ have, such as B. elliptical, square or even triangular, if only the outlet opening has more or less a crescent-shaped cross section, and the tube has no opening at the top through which the gas can escape. Crescent-shaped are also U- or V-shapes, as shown in Fig. 6 and 7, to understand. It is also not essential that the exit end of the tube and core be flat, it can also be concave or convex or even stepped as long as it is beveled forward.
According to FIG. 9, the nozzle is more less horizontal with its axis. The stream 15 of the molten

Spheres sprayed, which the contact surface of the core 11 within the crescent-shaped, with high Speed from the nozzle 17 coming gas stream in a more or less horizontal direction leaving.

• S, When the melt flow comes into contact with the gas

• "4tromj & * ground the beads into individual fibers 16 ~ »I / Vshaped. .

As already front page when hitting the \ ^ of, yDüsenkernes the current of the inorganic Mate j trials in many small beads splits, which then move substantially in the horizontal direction, so no significant energy content of the gas stream more for splitting and for the change in the direction of movement of the melt flow is used. As a result, a larger proportion of this energy is available for fiber deformation. Since the nozzle of the present invention allows greater energy utilization of the gas stream for fiber formation, greater fiber yield is also achieved than with previously used devices in which the falling stream of the molten, inorganic material does not come into contact with the front part of the vertically arranged nozzles.

The nozzle of the present invention has the further advantage that the deflection angle of the fiberized Material, "as expressed by 19 and the arrows in Fig. 9, is much smaller than the previous ones Nozzles with straight opening. This makes it much easier to collect the fibrous material.

The essential feature of the nozzle of the present invention is therefore that the front of the core is forward and downward in the direction of the movement of the gas flow is beveled.

The tube 10 can be made of any gas-tight material that is temperature-resistant, e.g. B. cast iron.

The core is made of refractory material because temperatures up to 2000 ° C in the manufacture of inorganic fiber material can occur. The usual electrode graphite is preferably used for the core used. The dimensions of the tube and core of the nozzle are determined by the amount of molten inorganic material. The inside diameter of the tube 10 can be from 1 to 10 cm.

For example, from a nozzle with a cast iron pipe with an inner diameter of 3.5 cm and a bevel of 45 ° and a graphite core diameter of 2.8 cm at the nozzle outlet, according to FIGS. 1 to 5, when blowing with steam of 7 kg / cm ² about 400 kg per hour of molten inorganic material was shredded, the composition of which consisted chiefly of 50 per cent aluminum oxide and 50 per cent silicon oxide. λ «

In comparison, a non-beveled, * ^ ¹ * crescent-shaped nozzle at the same cross-section and 7 kg / cm ² pressure gave a fiberization of only about 360 kg 'material of the same composition.

Although the nozzle is described in connection with the manufacture of inorganic fiber material, Such nozzles can also be used for the production of other, blown, inorganic materials. For example, they can be blown into mullite by converting a falling stream of molten mullite into mullite use.

Claims (1)

Claim. £ foj Nozzle for shredding molten substances to the 5H ^ Manufacture of inorganic fibers, consisting of λ, - a tube with inserted ^ "orJSh Toggle the pipe lying "core, characterized in that VV <j Tube and core on the outlet side in the same -n, L Way are bevelled, with that of the pipe (" ¹ ^ axis and the bevel formed angle 2 0 / f / ^ Λ to 70 °, preferably 45 °. _ ' Considered publications:
German patent specification No. 862 423. 1 sheet of drawings © 909 688/103 12.