BG66638B1 - Mineral fiber obtaining device - Google Patents

Abstract

The mineral fiber production device finds application in the production of building materials, in particular for the obtaining of mineral fibers from rocks types for the needs of metallurgy, the chemical industry and other areas in which the fiber is obtained from molten rock types. It consists of a fiber distribution mechanism, of a filler (1) with a working opening (2), of an internal burner (3) inserted into a spindle (4), of an round-shape combustion chamber (5) with a nozzle (51), of an outer cup (6) and of an motor (8) connected to the spindle (4). The fiber distribution mechanism is designed as a distribution disk (7) on which are arranged vertical dividers (71) of rectangular triangles shape, of which the length of the smaller cathetus of the triangle L depends on the viscosity determined by the formula: L = tg (w r n-1).

Description

Field of technology

The invention relates to a device for producing mineral fibers, which is used in the production of building materials, in particular in the production of mineral fibers from rocks for the needs of metallurgy, chemical industry and others.

BACKGROUND OF THE INVENTION

U.S. Pat. No. 2003,196458 describes a device for producing fibers, comprising a base on which a melt is fed by means of a filler. The base is mounted to a spindle, which is connected to a drive mechanism, and to the periphery of the base is mounted an outer cup with working holes on its periphery. A burner with holes is mounted around the spindle. A ring-shaped combustion chamber is mounted around the cup, in the lower part of which a nozzle is provided.

With the known device for producing fibers, the melt is not fed in the center of the disk, which does not achieve a uniform distribution of the melt on the periphery, there is no uniformity of temperature and viscosity of the melt. Therefore, the fiber drawing is not the same diameter. The known device cannot achieve good fiber quality, it does not have a long-fiber structure, and the number of folds is large. All this leads to a reduction in the quality of the final technological product obtained from mineral fibers.

Technical essence of the invention

The object of the invention is to provide a device for the production of mineral fibers, in which the obtained fiber has improved qualities.

According to the invention, this object is achieved by means of a device for producing mineral fibers, comprising a burner, a melt filler and a hollow vertical spindle, at the lower end of which an outer cup is mounted, on the side surface of which holes are formed, and the spindle is connected to a motor. It is characteristic of the device that the burner is located in the spindle, as the filler has a working hole and is located above the spindle. The outer cup is turned with its open part downwards, and under the spindle there is a distribution disk, on the upper surface of which are placed vertical ribs in the shape of right triangles, the smaller leg of which is located on the edge of the distribution disk. An annular combustion chamber is mounted around the outer cup, and the length of the smaller leg of the triangle L depends on the viscosity of the melt and is determined by the formula:

L = tg (wnr ¹ ).

Advantages of the device for obtaining mineral fibers are that the distribution disk achieves a more uniform distribution of the melt on the inner surface of the outer cup, provides uniform heating of the melt over the entire volume of the distribution cup with intensive stirring of the melt and stabilization of the melt by temperature and viscosity. An even distribution of the melt on the periphery, uniformity of the temperature regimes, the viscosity of the melt is achieved, which allows the drawing of a fiber with the same diameter. In this way, the device can work with non-permeable melts and a large temperature gradient in the melt, which is now quite problematic.

Description of the attached figures

The invention is explained in more detail by means of a device for producing mineral fibers by using a centrifugal filler-blowing method, shown in the figures, where:

Figure 1 shows a sectional view of the construction of the device and Figure 2 shows the shape of the distribution disk of the device.

Examples of the invention

As shown in figures 1 and 2, the device for producing mineral fibers consists of a filler 1 with a working hole 2, an internal burner 3 inserted into the spindle 4, an annular combustion chamber 5 with a nozzle 51,

Descriptions of issued patents for inventions № 03.1 / 15.03.2018 outer cup 6, distribution disk 7 with vertical ribs 71 and motor 8 connected to the spindle 4 for its drive. The vertical ribs 71 are made as right triangles, the smaller leg of which is located on the edge of the distribution disk 7.

The device uses a centrifugal filler-blowing method for obtaining mineral fibers, in which the melt from the filler 1 passes through the working hole 2 and is fed to the distribution disk 7, which is mounted coaxially with the spindle 4 with the outer cup 6.

On the surface of the distribution disk 7 are located ribs 71, which provide a more even distribution of the melt on the inner surface of the outer cup 6. To maintain the required temperature of the melt, respectively its viscosity, in the body of the spindle 4 is the inner burner 3. When rotating through the motor 8 of the spindle 4 at a speed of 6000 rpm, the melt after falling on the distribution disk 7 under the influence of centrifugal forces is sprayed on the inner walls of the outer cup 6, on the side surface of which are formed multiple working holes 61 .

Under the influence of the same centrifugal forces, the melt passes through the working openings 61 of the outer cup 6 as thin jets with a diameter of 600-800 pm and falls into the zone of passage of the combustion products of the gas-air mixture from the annular combustion chamber 5. These combustion products have temperature of 1400-15 00 ° C and passing through the nozzle 51 come out at a speed of 200 m / s blowing blown fibers from the jets of the melt, which passes through the working holes 61 of the outer cup 6. These mineral fibers have a diameter of 2 -80 pm and length of 100-500 mm.

The proposed design of the device creates conditions for maintaining a uniform temperature of the melt in the area of formation of the jets of mineral fibers, which increases the quality of the obtained as a final product mineral fibers.

For more even distribution of the melt on the inner surface of the outer cup 6, the vertical ribs 71 are formed as right triangles, the smaller leg of which is located on the edge of the distribution disk 7. This ensures even heating of the melt over the entire volume of the outer cup 6 during its intensive stirring, as well as its stabilization in temperature and viscosity. The length of the smaller leg of the triangle L depends on the viscosity of the melt and is determined by the following mathematical formula:

L = tg (wnr ¹ ), where:

w - viscosity of the melt, d - radius of the distribution disk, η - number of vertical partitions.

Claims (1)

Patent claims A device for producing mineral fibers, comprising a burner, a melt feed filler and a hollow vertical spindle, at the lower end of which an outer cup is mounted, on the side surface of which holes are formed, and the spindle is connected to a motor, characterized by with the burner (3) being located in the spindle (4), the filler (1) having a working opening (2) and being located above the spindle (4), and the outer cup (6) facing downwards with its open part, under the spindle (4) is a distribution disk (7), on the upper surface of which are placed vertical ribs (71) in the form of right triangles, the smaller leg of which is located on the edge of the distribution disk (7), where an annular combustion chamber (5) is mounted around the outer cup (6), and the length of the smaller leg of the triangle L depends on the viscosity of the melt and is determined by the formula: L = tg (wnr ¹ ).