KR100465272B1 - Apparatus for manufacturing basalt continuous fibers - Google Patents

Abstract

The present invention relates to a method for producing basalt continuous fibers and a device used therein, which are capable of producing basalt continuous fibers of excellent quality using basalt suitable for continuous fiber production.

It comprises the steps of grinding the basalt into basalt crushed stone having a thickness of 20 mm or less; Melting the basalt crushed stone at 1,440 ° C. to 1,480 ° C .; Drawing the molten basalt while maintaining at 1,380 ° C. to 1,480 ° C .; Gradually cooling the continuous fiber to 960 ° C to 1,150 ° C; Applying a surface treating agent to the surface of the continuous fiber; And drying and winding up the surface treating agent applied to the continuous fiber.

According to this, it has the outstanding effect which can manufacture the basalt continuous fiber excellent in heat resistance, alkali resistance, mechanical properties, etc.

Description

Apparatus for manufacturing basalt continuous fibers

The present invention relates to a method for producing basalt continuous fibers and a device used therein. More specifically, a method for preparing basalt continuous fibers and a method for using the same, which can be used to produce basalt continuous fibers of high quality using basalt suitable for continuous fiber production. It is about a device.

Basalt is a type of granite that is formed by lava discharged to the surface by volcanic action. It is a cheap natural material buried in large quantities in Jeju Island, Cheorwon and Pohang Yeongil Bay in Korea.

Basalt continuous fiber is an environmentally friendly fiber made of basalt that has been weathered and stabilized for tens of millions of years and has excellent heat resistance, alkali resistance, and mechanical properties. Therefore, the basalt continuous fiber is used in various fields such as plastic reinforcing fiber, concrete structure repair reinforcing fiber, automotive soundproofing material, heat-resistant fiber for fire-proof material, reinforcing fiber of composite materials.

Japanese Patent Application Laid-Open No. 9-500080, which is one of the related arts related to basalt continuous fibers, presents conditions for drawing speed and heating temperature in producing basalt fibers having a filament diameter of 7 microns or less. Japanese Patent Application Laid-Open No. 2001-508389 proposes stabilization conditions in a melt injection apparatus for producing basalt continuous fibers using basalt powder.

In addition, US Pat. No. 4,193,336 relates to the production of a strand of basalt ceramic fibers from basalt-containing materials using a laboratory-scale electric furnace, which proposes heating to increase the crystalline content after fiber formation. Patent 6251660 proposes a method for producing short fibers and continuous fibers from waste containing rock or glass, mainly for furnace internal structure.

However, these prior arts present only a part of the manufacturing conditions of the overall manufacturing process, so it is impossible to identify the correlations and systematize the whole manufacturing process. Therefore, it is very difficult to manufacture basalt continuous fibers using these conventional techniques. There was a problem.

The present invention is to solve the conventional problems, to provide a basalt continuous fiber manufacturing method and apparatus used to be able to produce a high-quality basalt continuous fiber using a basalt suitable for continuous fiber production. have.

1 is a block diagram schematically showing a basalt continuous fiber manufacturing process according to the present invention;

Figure 2 is a schematic configuration diagram showing the overall basalt continuous fiber production facilities according to the present invention;

Figure 3 is a detail view of the "A" part of Figure 2;

Figure 4 is a detailed view showing the fiber forming machine that is the main portion of the present invention;

5 and 6 are schematic configuration diagrams showing a state in which a plurality of fiber formers are provided in the apparatus of the present invention.

※ Explanation of symbols about main part of drawing ※

10: basalt 12: basalt crushed stone

20: grinder 30: conveyor

40: silo 50: melting furnace

53: melt flow path 55: vertical wall

60: burner 62: piping

64: air supply port 65: fuel supply port

66: heat exchanger 68: fuel / air mixer

70: fiber forming machine 72: screen plate

75 melt through hole 76 bushing

78: nozzle 80: heater

82: applicator 84: dryer

86: winding machine 90: cooling device

91: heating device

As a technical configuration for achieving the above object, the present invention comprises the steps of pulverizing the basalt into basalt crushed stone having a thickness of 20 mm or less; Melting the basalt crushed stone at 1,440 ° C. to 1,480 ° C .; Drawing the molten basalt while maintaining at 1,380 ° C. to 1,480 ° C .; Gradually cooling the continuous fiber to 960 ° C to 1,150 ° C; Applying a surface treating agent to the surface of the continuous fiber; And it is to provide a basalt continuous fiber manufacturing method comprising the step of drying and winding the surface treatment agent applied to the continuous fiber.

The present invention also provides a grinder for crushing basalt; Silos for storing and quantitatively discharging basalt crushed stone in the crusher; A melting furnace receiving basalt crushed stone from the silo; A burner for heating and melting basalt crushed stone of the melting furnace; A fiber former for forming fibers by receiving the molten basalt through the melt movement path formed at one side of the melting furnace; And a basalt continuous fiber manufacturing apparatus including a winding machine for winding the basalt fibers discharged from the fiber forming machine.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

First, the composition of the basalt used in the present invention will be described.

Basalt suitable for continuous fiber production is 47 to 56 wt% SiO ₂ , 14 to 19 wt% Al ₂ O ₃ , 7.0 to 15 wt% FeO + Fe ₂ O ₃ , CaO 8 to 11 wt%, MgO 3.5 to 10.0 wt% , K ₂ O + Na ₂ O 2.5 to 6.0 wt%, TiO ₂ 0.2 to 2.0 wt%, P ₂ O ₅ 0.3 to 0.8 wt%, Cr ₂ O ₃ 0.04 wt% or less, MnO 0.2 wt% or less, SO ₃ 0.2 It has a composition of up to weight percent.

Conditions for basalts suitable for producing continuous fibers are that homogeneous melts may be formed when the basalts are melted, and that the temperature range for maintaining the viscosity to produce the continuous fibers is sufficiently large. If it meets the requirements, it is possible to produce large quantities of excellent products with uniform physical properties.

Particularly, rocks such as basalt have a tendency to have a large dependence on temperature for crystallization and viscosity, and in order to produce continuous fibers using basalt, a temperature range that can maintain a viscosity capable of producing continuous fibers is 70 ° C. In the temperature range of 70 ° C. or less, it is difficult to continuously produce continuous fibers, and even if the production is possible, the production conditions are difficult and productivity is markedly lowered, thus lowering economic efficiency.

In the above, SiO ₂ is a component related to the viscosity of the melt, the melting temperature, chemical resistance, the temperature range of continuous fiber production, the recrystallization tendency, etc., if the component is less than 47% by weight to maintain the viscosity to produce a continuous fiber The temperature range is less than 70 ℃ has a problem in productivity and economics, if the 56 wt% or more, the melting temperature is high, fuel consumption is large, and the viscosity is high, the fiber often breaks, there is a problem in productivity.

In addition, Al ₂ O ₃ is a component related to viscosity, crystallization temperature, heat resistance, and the like. When this component is less than 14% by weight, the crystallization phenomenon is slowed down, and the strength is decreased. The higher the crystallization temperature has a problem that the melting temperature should be higher.

In addition, FeO + Fe ₂ O ₃ is a component related to viscosity, melting temperature, crystallization tendency, etc., when the component is less than 7.0% by weight, it is difficult to produce continuous fibers due to its low viscosity, and bushing when it is 15% by weight or more. The reaction rate with platinum increases rapidly, reducing the life of expensive bushings and easily clogging the nozzles of the bushings, which makes it difficult to produce uniform diameter fibers.

In addition, CaO is a component related to strength, heat resistance, chemical resistance, and the like. When this component is less than 8% by weight, the chemical resistance is poor, and when it is 11% by weight or more, the strength and heat resistance are poor.

In addition, MgO is a component related to expandability, heat resistance, chemical resistance, and the like, and when this component is less than 3.5 wt%, the chemical resistance and heat resistance are deteriorated. Due to the large amount of surface cracks due to the problem of lowering the strength.

In addition, K ₂ O + Na ₂ O is a component related to melting temperature, alkali resistance, acid resistance, etc., when the component is less than 2.5% by weight, the alkali resistance is lowered, and when it is 6.0% by weight or more, the acid resistance is low There is a problem.

In addition, the trace components TiO _2, P ₂ O _5, Cr ₂ O _3, MnO and SO ₃ are components related to strength, melting temperature, surface properties, crystallization rate, etc. It is difficult to obtain uniform physical properties due to local crystallization and difficulty in homogenizing the melt, resulting in poor economic conditions due to difficult manufacturing conditions.

Next, the process of manufacturing a continuous fiber using the basalt which has the above-mentioned component is demonstrated with reference to FIG.

(Basalt grinding step)

A basalt having the composition is prepared and pulverized to a size that can be melted at an appropriate rate and does not cause temperature disturbance of the melt. Preferably, the approximate diameter of the basalt is in the range of 5 mm to 20 mm, and if basalt having a size larger than 20 mm is directly introduced into the furnace, not only does the basalt not melt properly, It is not preferable because it is difficult to continuously obtain a homogeneous melt by lowering the temperature of the furnace while being introduced into the furnace.

[Basalt Insertion Stage]

The crushed basalt is introduced into the furnace at a suitable speed. Of course, the rate and dose of basalt is related to the fiber production capacity of the plant. The pulverized basalt may be added to the melting furnace at a high speed to improve the productivity of the fiber, but when the basalt is added to the melting furnace at a too high speed, the basalt added to the melting furnace may not be melted. On the other hand, when basalt is introduced into the melting furnace at a too low speed, it is not preferable because it has a problem of lowering the productivity of the fiber.

(Basalt melting step)

The basalt added to the melting furnace is heated to melt in the range of 1,440 ° C to 1,480 ° C. If the temperature of the melting furnace is set too low, the homogenization is not performed, such as the basalt melt is not properly mixed, and if it is set too high, energy consumption is excessive, which is not preferable.

(Basalt melt homogenization step)

The basalt melt is homogenized so as to be suitable for producing continuous fibers and to minimize the change in properties of the continuous fibers produced. If the basalt melt is not homogenized properly, it is not preferable because the physical properties of the fiber to be drawn or the fiber to which the drawing is completed are not uniform so that the weak part is broken.

(Continuous fiber forming step)

Homogenized basalt melt is drawn through a small diameter to form continuous fibers. At this time, it is good to suppress the sudden change in the temperature of the basalt melt, because if the temperature of the melt changes rapidly, cracks are generated on the surface of the fiber. Preferably, the drawn continuous fibers are cooled while heating at a temperature of 960 ° C to 1,150 ° C. If the heating temperature is set too high, the crystallization rate is increased and the strength is locally increased, so that the fiber is broken and the productivity is drastically reduced.

[Surface Treatment Step]

The surface treatment agent is applied to the surface of the drawn continuous fiber. This surface treatment agent can be selected according to the use of the fiber and performs the functions of improving the lubricity of the fiber surface, protecting the surface, reducing friction, increasing tensile strength, and increasing surface adhesion.

The surface treatment agent may be an organic surface treatment agent and an inorganic surface treatment agent, the organic surface treatment agent is mainly composed of a film forming agent, a coupling agent, a lubricant and a processing aid, the inorganic surface treatment agent is composed of an inorganic film agent and a processing aid. It is preferable to perform the surface treatment at a temperature of 580 ° C to 820 ° C so that drying or curing can be performed in a short time depending on the applied surface treatment agent. If the drying and curing temperature is too low, the application time is short, so sufficient drying and curing cannot occur, and if the drying and curing temperature is too high, the uniform surface coating is impossible due to the oxidation of organic materials, thus serving as a surface treatment agent. You will not. The surface treatment agent used at this time is preferably set to 0.1% by weight to 3% by weight with respect to the fiber. If this component is less than 0.1% by weight, the surface treatment is not complete, so the effect of the surface treatment cannot be obtained. If this component is more than 3% by weight, it is difficult to complete drying and curing in a short time. There is a problem that is difficult to form.

[Fabric winding step]

After drawing, the fiber-processing step is completed by focusing and winding the surface-treated fiber into several strands.

Hereinafter, with reference to the accompanying drawings, a basalt continuous fiber manufacturing apparatus according to the present invention will be described in detail.

Figure 2 is a schematic configuration diagram showing the basalt continuous fiber manufacturing equipment as a whole.

The conveyor 30 is installed at the exit of the grinder 20 provided to crush the large basalt 10 in size, and a silo 40 is mounted below the end of the conveyor 30. That is, the basalt crushed stone 12 crushed in the crusher 20 is stored in the silo 40 through the conveyor 30.

A basalt crusher ejector 42 is provided at the bottom of the silo 40, and the basalt crusher ejector 42 discharges the basalt crushed stone stored in the silo 40 at a constant speed.

A melting furnace 50 for melting basalt is provided below the basalt crushed stone discharger 42, and the melting furnace 50 may have a closed space that is blocked from the outside.

One side of the melting furnace 50 is provided with a basalt crushed stone supply port 52 to receive the basalt crushed stone 12 discharged from the basalt crushed stone discharger 42 to be supplied to the melting furnace 50.

In addition, a heating burner 60 is installed at a plurality of places of the melting furnace 50, and the burner 60 melts the basalt crushed stone in the melting furnace 50 by burning by receiving air and fuel gas. Here, the burner 60 is installed vertically downward from the upper portion of the melting furnace 50 so that the high-speed flame is mixed with the melt, it is possible to prevent the refractory brick constituting the melting furnace 50 is deteriorated. It is desirable to provide cooling facilities around the melting furnace.

The burner 60 is connected to receive air and fuel gas through an air and fuel gas supply pipe 62, and an air supply port 64 and a fuel supply port 65 to the air and fuel gas supply pipe 62. ) Is provided. More preferably, a heat exchanger 66 is further provided to heat-exchange the cold air introduced through the air supply port 64 with the high-temperature exhaust gas discharged from the smelting furnace 50 to burn the air preheated to an appropriate temperature. It is preferable that the fuel / air mixer 68 is further provided to be configured to be supplied to the 60 and to supply the burner 60 with the air and the fuel gas in an appropriate ratio for combustion.

And, by placing the basalt crushed stone supply port 52 between the burner 60 in the above it is preferable to configure so that the basalt crushed stone can be supplied to the melting furnace 50 in a heated state.

The basalt melted in the melting furnace 50 is supplied to the fiber forming machine 70 through the melt movement passage 53, which will be described in more detail with reference to FIGS. 2 and 3 as follows.

The vertical wall 55 is formed higher than the bottom 54 at one side of the bottom of the melting furnace 50, and the basalt melt overflowed through the upper end of the vertical wall 55 to the fiber former 70. The melt movement passage 53 is formed to have approximately the same height as the upper end of the vertical wall (55). That is, after the basalt crushed stone is melted at the top of the bottom 54 of the melting furnace 50, it can be moved to the fiber former 70 by overflowing the melt moving passage 53 through the top of the vertical wall 55. .

The fiber former 70 is provided at a predetermined position of the melt movement passage 53 and is installed such that an upper end thereof is about the same height as the bottom of the melt movement passage 53.

The fiber former 70 is formed in the form of a box having a predetermined space therein by blocking the edge portion and the upper and lower ends with a plate as shown in Figure 4, the inner space of the fiber former 70 Is separated up and down by the horizontal screen plate 72. At least one melt through hole 75 penetrated up and down is formed in the upper wall 74 which is the upper part constituting the fiber former 70 having such a configuration, and 180 to 210 penetrated up and down in the bushing 76 which is the lower part. Four through-holes 77 are arranged at regular intervals. Further, a nozzle 78 corresponding to each of the through holes 77 and having a diameter of 2 to 3 mm (more preferably 1.7 to 2.3 mm) is fixed to the lower portion of the bushing 76. In particular, the fiber former 70 is made of a platinum-rhodium alloy that is chemically stable at high temperatures to prevent corrosion of all sites in contact with the basalt melt in combination with iron oxide. Therefore, in order to minimize the use of expensive platinum-rhodium alloy, it is preferable to minimize the volume of the fiber former 70 and form a thin thickness of about 0.7 mm to 1.7 mm.

In addition, the screen plate 72 has 300 to 400 through-holes 73 that are vertically penetrated while being smaller than the diameter of the nozzle 78 at regular intervals.

In addition, a cooling and heating device (90, 91) is provided around the fiber former 70 to maintain a constant temperature and viscosity constant for the continuous fibers of basalt.

The lower part of the fiber former 70 is equipped with a heater 80 to prevent the cooling of the basalt continuous fibers drawn through the nozzle 78 rapidly.

In addition, the lower surface of the heater 80 is provided with a surface treatment agent applicator 82 for physically and chemically treating the surface of the continuous fiber in order to improve the surface properties of the continuous fiber, the surface treatment agent applicator 82 In the lower part, a dryer 84 for drying the surface treatment agent applied to the surface of the continuous fiber is installed, and in the lower part of the dryer 84, a plurality of strands of the continuous fiber are condensed so as to be made into strands in the form of thread. The winder 86 is installed.

FIG. 5 shows a case in which a plurality of fiber formers 70 are provided in the melting furnace 50A in order to increase the production of the basalt fibers. For this purpose, the melt movement passage 53 is formed at a plurality of positions of the melting furnace 50A. And, the fiber former 70 is installed so as to correspond to each of the melt movement passage 53, the heater 80A, the applicator 82A, the dryer 84A and the winding machine (below) of the fiber former 70 The configuration in which 86A) is installed is similar to the above.

6 shows an aspect in which the melt movement passages are formed in various forms in the melting furnace, and (a) shows five melt movement passages 53 formed on one side of the melting furnace 50B, and in each of the melt movement passages 53. The fiber former 70 is formed so as to correspond to each other, and (b) shows that two melt movement passages 53 are formed on both sides of the melting furnace 50B, respectively, and the fiber former 70 is formed in each of the melt movement passages 53. ) Shows the installed configuration.

The process of producing basalt continuous fibers using the apparatus of the present invention described above will be described in more detail.

When foreign matters are removed and the basalt 10 suitable for continuous fiber production is supplied to the grinder 20, the grinder 20 grinds the basalt 10 so that the approximate diameter is included in the range of 5 mm to 20 mm. The crushed basalt crushed stone 12 is discharged to the conveyor 30.

The basalt crushed stone 12 discharged to the conveyor 30 is transported to the silo 40 by the conveyor 30 and stored.

The basalt crushed stone 12 stored in the silo 40 is introduced into the melting furnace 50 at a constant speed through the basalt crushed stone ejector 42 provided at the bottom of the silo 40, and the input speed of the basalt crushed stone 12 Is preset to work with the basalt fiber manufacturing capacity of the device.

At this time, it is preferable to preheat the basalt crushed stone 12 discharged from the basalt crushed stone discharger 42 by the burner 60 installed to surround or approach the basalt crushed stone discharger 42. . In addition, the basalt crushed stone discharger 42 is preferably configured to be able to disperse the basalt crushed stone from the top of the melting furnace 50 in all directions.

The basalt crushed stone 12 introduced into the smelting furnace 50 is heated / melted by the burner 60 to an extent of 1,440 ° C. to 1,480 ° C., and the burner 60 has combustion air through air and fuel gas supply pipes 62. And fuel gas are supplied, and the air thus supplied is preheated to about 280 ° C to 300 ° C in the heat exchanger 66.

As the basalt crushed stone 12 is melted in the smelting furnace 50, impurities such as impurities contained in the basalt are discharged to the upper portion of the melt by specific gravity, and only the pure basalt component flows through the upper end of the vertical wall 55. Is supplied. In particular, the melting temperature of the basalt crushed stone 12 is set to a temperature that is sufficiently homogenized to maintain the viscosity of the basalt melt in an appropriate state to prevent breakage during fiber drawing and at the same time to prevent cracks from occurring on the fiber surface. do.

Subsequently, the basalt melt of the melt movement passage 53 is supplied into the fiber former 70 through the melt passage holes 75 formed in at least one of the upper walls 74 of the fiber former 70.

At this time, it is preferable that the upper surface of the upper wall 74 of the fiber former 70, that is, the position of the melt passage hole 75 to be 15 mm to 20 mm deep with respect to the surface of the basalt melt 58. However, this is because the physical properties of the basalt melt 58 is slightly different depending on the depth and the basalt melt 58 having a depth of about 15 mm to 20 mm, which is the depth at which homogenization is most appropriate, is supplied to the fiber former 70. For sake.

The basalt melt supplied to the upper portion of the screen plate 72 through the melt passage hole 75 of the fiber former 70 spreads wide at a constant height on the upper portion of the screen plate 72 and at the same time penetrates the screen plate 72. It is discharged downward through the hole 73. And this process makes the basalt melt more homogeneous.

Subsequently, the basalt melt discharged downward through the through hole 73 of the screen plate 72 spreads wide at a constant height on the upper portion of the bushing 76, and at the same time, the through hole 77 of the bushing 76 and the through hole. One strand of basalt fiber is drawn out through the nozzle 78 fixedly installed in the hole 77.

At this time, the diameter of the basalt fiber drawn through the nozzle 78 is mainly affected by the internal diameter and length of the nozzle 78, the melt depth of the upper portion of the bushing 76, the dynamic viscosity and the drawing speed of the melt, but the nozzle ( Since the inner diameter of the nozzle 78 is most affected by the dynamic viscosity and the dynamic viscosity, it is very important to properly set the internal diameter of the nozzle 78 and to maintain the dynamic viscosity of the melt appropriately. In particular, it is very important that the basalt melt staying on top of the bushing 76 is kept low and constant, while at the same time maintaining the temperature of the basalt melt of this part at an appropriate temperature for basalt continuous fiber production, which is a nozzle Maintaining a constant flow rate and temperature of the basalt melt discharged through the (78) to make a fiber enables the production of excellent products with little change in physical properties.

The basalt fiber drawn through the nozzle 78 passes through a heater 80 installed below the fiber former 70, and the heater 80 forms a basalt fiber to prevent the basalt fiber from being quenched by outside air. It cools slowly, heating at about 960 degreeC-1,150 degreeC.

Then, a surface treatment agent is applied to the outer surface of the basalt fibers discharged from the heater 80 so as to give suitable properties to the basalt fibers in the applicator 82, the surface treatment agent applied to the surface of the basalt fibers 580 ℃ ~ It dries and cures in a short time while passing through a dryer 84 maintained at 820 ° C. In particular, the surface treatment agent applied to the surface of the basalt fiber has various characteristics depending on the type, but usually increases the lubricity at the surface of the basalt fiber, protects the surface, reduces the friction to prevent cutting, strength and surface Increasing the adhesion, reducing the deviation of the diameter can improve the properties and quality and increase the productivity.

Subsequently, the basalt fibers are bundled by a plurality of strands into one and wound by a winder 86.

Hereinafter, an Example demonstrates this invention.

EXAMPLE

The present inventors grind the basalt having the chemical composition shown in Table 1 to have a thickness of 5 to 20 mm, preheat the crushed basalt crushed stone to 300 ° C., inject it into a melting furnace, and then heat to 1,460 ° C. to melt and melt 1,360-1,430 ° C. The continuous fibers were drawn out, followed by application of the organic surface treatment agent to the surface of the continuous fibers, followed by drying and curing. In addition, it was shown in Table 2 by measuring the viscosity according to the temperature as a basalt having a chemical composition of Table 1, the temperature range that can maintain the viscosity to produce a continuous fiber was all 70 ℃ or more. Table 3 shows the tensile strength and chemical durability of the basalt continuous fibers prepared from the basalt having the chemical composition shown in Table 1.

[Table 1] Composition of basalt

Oxide Sample Number SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ + FeO MgO CaO Na ₂ O K ₂ O TiO ₂ MnO Cr ₂ O ₃ P ₂ O ₅ K1 54.48 18.95 8.42 4.82 8.07 2.25 1.09 1.01 0.09 0.04 0.27 K2 51.20 17.80 13.00 4.04 7.57 2.80 1.02 1.41 0.15 0.02 0.42 K3 52.50 18.50 10.30 4.70 7.53 2.90 1.20 1.31 0.20 0.02 0.30

[Table 2] Viscosity according to temperature

Sample Number Viscosity (P) according to the temperature of the melt (℃) 1450 1400 1350 1300 1250 1200 K1 180 370 680 1140 2100 4210 K2 140 250 470 960 1970 3980 K3 152 275 500 1020 2060 4200

[Table 3] Tensile strength and chemical resistance of basalt continuous fiber

Sample Number Fiber diameter (㎛) Tensile Strength (MPa) Chemical durability H ₂ O NaOH0.5 hours NaOH2 time HCl2 time Water resistance% Chemical resistance% Chemical resistance% Chemical resistance% K1 9 3380 99.67 97.20 96.80 92.30 10 3260 K2 9 3320 99.61 97.70 95.30 91.40 10 3260 11 3200 K3 9 3330 99.66 98.76 97.20 93.80 10 3280 11 3250 13 3190

According to Table 3, samples K1, K2 and K3 all maintained the viscosity to produce a continuous fiber and the tensile strength was 3200 ~ 3400 MPa. In addition, water resistance, alkali resistance and acid resistance were excellent.

As described above, according to the method for producing basalt continuous fiber according to the present invention and the apparatus used therein, the basalt continuous fiber having excellent heat resistance, alkali resistance, mechanical properties, and the like can be produced.

Claims (10)

A grinder 20 for grinding the basalt 10; A silo 40 for storing and quantitatively discharging basalt crushed stone 12 pulverized in the crusher 20; A melting furnace 50 receiving the basalt crushed stone 12 from the silo 40; A burner (60) for heating and melting the basalt crushed stone (12) of the melting furnace (50); An upper wall 74 having a melt passage hole 75 formed to penetrate up and down to receive the basalt melted through the melt movement passage 53 formed at one side of the melting furnace 50, and a lower portion of the upper wall 74. A screen plate 72 horizontally disposed and having a plurality of through holes 73 through which the basalt melt passed through the melt passage hole 75 passes upward and downward, and horizontally below the screen plate 72. A fiber former (70) comprising a bushing (76) disposed and provided with a plurality of nozzles (78) for passing the basalt melt supplied through the through hole (73) to form fibers; And Basalt continuous fiber manufacturing apparatus comprising a winder (86) for winding the basalt fibers discharged from the fiber forming machine (70). The apparatus of claim 1, further comprising a heater (80) for heating and slow cooling the fibers discharged from the fiber former (70). According to claim 1, Applicator 82 for applying the surface treatment agent to the surface of the fiber discharged from the fiber forming machine 70, and dryer 84 for drying the fiber discharged from the applicator 82 is further Basalt continuous fiber manufacturing apparatus, characterized in that included. The apparatus of claim 1, wherein the melt movement passage (53) is connected to a vertical wall (55) formed at one side of the melting furnace (50) to overflow the basalt melt. delete delete delete delete delete delete