Inorganic refractory fiberboard and its preparation process, material adding device and production system

Abstract

The invention provides an inorganic refractory fiberboard and a preparation process, a material adding device and a production system thereof, and relates to the technical field of fiberboards. The inorganic refractory fiberboard preparation process is characterized in that it comprises the following steps: step one: mixing and melting various raw materials in proportion; step two: spinning the molten raw materials into fibers, and spraying additives on the fibers in a spraying manner through the material adding device as described in claim 1-6 while spinning; step three: collecting the fibers for acupuncture to form large fiber blocks; step four: sawing the large fiber blocks into fiber blocks of a required size; step five: heating and pre-calcining the fiber blocks; the raw materials in step one include the following materials in parts by weight: 33-48 parts of aluminum oxide, 45-60 parts of silicon dioxide, and 0.1-1 parts of additives, wherein the additives are composed of coconut oil diethanolamide and silica sol, with coconut oil diethanolamide accounting for 85-95% and silica sol accounting for 15-5%.

Description

Technical Field

[0001] The invention relates to the technical field of fiberboard production, in particular to an inorganic fire-resistant fiberboard and a preparation process, a material adding device and a production system thereof. Background Art

[0002] Inorganic fiberboard is a board made of refractory fibers processed from mineral raw materials. It has many forms, including glass fiberboard, ceramic fiberboard, etc. This type of board has excellent flame retardancy and heat resistance and is widely used in thermal insulation.

[0003] In the production process of inorganic fiberboard, a high-frequency spinning machine is used to spin the molten material into fiber filaments. However, since the fiber filaments spun by the spinning machine will spread to both sides, the fiber filaments will spread over a wide range, which may easily cause the overly scattered fiber filaments to be unable to enter the effective collection range of the cotton collector, making it inconvenient to collect. Summary of the invention

[0004] The object of the present invention is to provide a material adding device, aiming to solve the problem of wide diffusion range of fiber filaments thrown out by a spinning machine in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solution: the material adding device comprises:

[0006] A mounting seat, on which a rotating shaft is fixedly mounted, a hollow cavity is provided inside the rotating shaft, and one end of the rotating shaft is connected to a liquid adding pipe communicating with the hollow cavity;

[0007] The middle nozzle is mounted on the mounting seat and communicated with the hollow cavity;

[0008] Two mounting rods, one end of each mounting rod is mounted on the rotating shaft, a liquid separation channel is provided inside the mounting rod, and one end of the liquid separation channel is communicated with the hollow cavity inside the rotating shaft;

[0009] A plurality of mounting rod nozzles are respectively mounted on two mounting rods and are connected with the liquid separation flow channel. The mounting rod nozzle close to the middle nozzle has a larger flow rate, while the mounting rod nozzle far from the middle nozzle has a smaller flow rate.

[0010] A further technical solution of the present invention is that an adjustment mechanism for adjusting the angle between the two installation rods is installed on the installation seat.

[0011] A further technical solution of the present invention is that the adjustment mechanism includes a bidirectional screw rotatably mounted on a mounting seat, and sliding blocks are threadedly connected to two opposite threads of the bidirectional screw. The sliding block can only slide along the length direction of the mounting seat, and a connecting rod is rotatably mounted on the mounting rod, and the other end of the connecting rod is hinged to the sliding block.

[0012] A further technical solution of the present invention is that the adjustment mechanism includes two driving rods, the two driving rods are respectively hinged to two mounting rods, a slot is provided on the driving rod, a rack is provided in the slot, a gear is rotatably installed on the mounting seat, and the gear is meshed with the two racks.

[0013] A further technical solution of the present invention is that a docking block is installed on the top of the mounting seat, the bottom end of the gear passes through the docking block and is rotatably and slidably connected to the docking block, a polygonal mounting hole is opened at the axis of the gear, a sliding column is slidably installed in the mounting hole, a spring is connected between the sliding column and the mounting hole, the bottom end of the sliding column extends out of the mounting hole and a clutch disk is fixedly installed, a raised strip is arranged in a circular array on the upper surface of the clutch disk, and a groove matching the raised strip is arranged on the lower surface of the docking block.

[0014] A further technical solution of the present invention is that the liquid separation channel arranged inside the mounting rod is divided into a first liquid separation channel and a second liquid separation channel which are not connected, the first liquid separation channel is connected to the hollow cavity inside the rotating shaft, and an air blowing pipe connected to the second liquid separation channel is installed on the mounting rod, and at least one nozzle farthest from the rotating shaft is connected to the second liquid separation channel.

[0015] An inorganic refractory fiberboard production system includes a mixing device, an electric melting furnace, a spinning machine, a cotton collector, a needle punching machine, a slitting machine and a calcining kiln. The spinning machine is equipped with a material adding device to spray additives in an atomized form on the fibers spun out of the spinning machine.

[0016] A process for preparing an inorganic refractory fiberboard comprises the following steps:

[0017] Step 1: Mix and melt the raw materials in proportion;

[0018] Step 2: Spinning the molten raw material into fibers, and spraying additives on the fibers in a spraying manner through a material adding device during spinning;

[0019] Step 3: Collect the fibers and conduct a needle punching process to produce large fiber blocks;

[0020] Step 4: sawing the large fiber block into fiber blocks of required size;

[0021] Step 5: pre-calcining the fiber block at a temperature of 600-1200° C. for a time of 100-300 minutes.

[0022] An inorganic fire-resistant fiberboard comprises the following raw materials by weight: 33-48 parts of aluminum oxide, 45-60 parts of silicon dioxide, and 0.1-1 parts of additives, wherein the additives are composed of coconut oil diethanolamide and silica sol, wherein the coconut oil diethanolamide accounts for 85-95% and the silica sol accounts for 15-5%.

[0023] An inorganic fire-resistant fiberboard comprises the following raw materials by weight: 20-33 parts of calcium oxide, 62-69 parts of silicon dioxide, 3-7 parts of magnesium oxide, and 0.1-1 parts of additives, wherein the additives are composed of coconut oil diethanolamide and silica sol, wherein the coconut oil diethanolamide accounts for 85-95% and the silica sol accounts for 15-5%.

[0024] The beneficial effects of the present invention are:

[0025] When the present invention is used, the angle of the nozzle is adjusted so that the fibers thrown out by the spinning machine are gathered toward the axis of the middle nozzle, thereby reducing the diffusion range of the fibers in space and facilitating collection by a cotton collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the first embodiment of the present invention when it is installed.

[0027] Figure 2 It is a structural diagram of embodiment 1 of the present invention.

[0028] Figure 3 It is a structural schematic diagram of another viewing angle of the first embodiment of the present invention.

[0029] Figure 4 It is a schematic structural diagram of the liquid separation channel in the first embodiment of the present invention.

[0030] Figure 5 It is a cross-sectional view of the rotating shaft in the first embodiment of the present invention.

[0031] Figure 6 It is a structural schematic diagram of the mounting plate in the first embodiment of the present invention.

[0032] Figure 7 It is a schematic diagram of the structure after the mounting plate is tilted in the first embodiment of the present invention.

[0033] Figure 8 It is a structural diagram of embodiment 2 of the present invention.

[0034] Fig. 9 It is a schematic diagram of the structure after the mounting rod is adjusted in the second embodiment of the present invention.

[0035] Fig.10 It is a structural schematic diagram of the adjustment mechanism in the second embodiment of the present invention.

[0036] Fig.11 It is a structural schematic diagram of the sliding column in the second embodiment of the present invention.

[0037] Fig.12 It is a schematic diagram of the structure of the groove in the second embodiment of the present invention.

[0038] Fig.13 It is a structural diagram of embodiment 3 of the present invention.

[0039] Fig.14 It is a schematic diagram of the structure of the liquid separation channel in the third embodiment of the present invention.

[0040] In the figure: 1, spinning machine; 11, spinning roller; 2, nozzle rack; 21, mounting seat; 21a, receiving groove; 211, middle nozzle; 22, mounting rod; 221, mounting rod nozzle; 221a, first mounting rod nozzle; 221b, second mounting rod nozzle; 222, liquid separation channel; 2221, first liquid separation channel; 2222, second liquid separation channel; 223, blowing pipe; 23, rotating shaft; 23a, connecting hole; 231, hollow cavity; 232, liquid adding pipe; 3, adjusting mechanism; 31, bidirectional screw; 311, inner Hexagonal drive head; 32, guide rod; 33, sliding block; 34, connecting rod; 35, drive rod; 351, notch; 352, rack; 36, gear; 36a, mounting hole; 37, docking block; 371, left docking block; 372, right docking block; 373, plug block; 374, slot; 375, groove; 38, sliding column; 381, spring; 39, clutch plate; 391, raised strip; 41, mounting plate; 42, connecting rod; 43, slider; 44, screw; 45, synchronous wheel; 46, synchronous belt; 47, drive head. DETAILED DESCRIPTION

[0041] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0042] Embodiment 1:

[0043] like Figure 1 and 2 As shown, a material adding device comprises a nozzle frame 2 installed on a spinning machine 1, a spinning roller 11 is installed on the spinning machine 1, the heated molten material falls on the spinning roller 11 rotating at a high speed, and then the material is spun to the bottom of the spinning roller 11 in the form of filaments, at this time, the additive needs to be sprayed on the fiber filaments in a spraying manner, so the nozzle frame 2 is located below the spinning roller 11;

[0044] The nozzle frame 2 includes a mounting base 21, on which a rotating shaft 23 is fixedly mounted, and two mounting rods 22 are hinged on the rotating shaft 23. The two mounting rods 22 can rotate with the rotating shaft 23 as the rotation center. Three mounting rod nozzles 221 are installed on the same side of the two mounting rods 22. An intermediate nozzle 211 is installed on the mounting base 21. The mounting rod nozzle 221 and the intermediate nozzle 211 can spray additives onto the fiber filaments and blow the fiber filaments into a fiber collecting device at the same time.

[0045] In order to make the additive sprayed out from the mounting rod spray head 221 and the middle spray head 211 together;

[0046] Please refer to Figure 4 and 5 The mounting rod 22 is provided with a liquid separation channel 222 inside, and a plurality of branch channels 222a are provided on the mounting rod 22 at equal intervals, one end of the branch channel 222a is connected to the liquid separation channel 222, and the mounting rod nozzle 221 is installed on the open end of the branch channel 222a. The rotating shaft 23 is a hollow structure, and two connecting holes 23a with different heights are provided on the outer circular side surface of the rotating shaft 23, that is, the two connecting holes 23a are provided at different axial positions of the rotating shaft 23 and are staggered at a certain interval;

[0047] The mounting rod 22 is rotationally sealedly connected to the rotating shaft 23, and the hollow cavity 231 inside the rotating shaft 23 is connected to the liquid separation channel 222 through the connecting hole 23a, and the intermediate nozzle 211 is connected to the hollow cavity 231 inside the rotating shaft 23. A liquid adding tube 232 is installed at the bottom end of the rotating shaft 23, and the liquid adding tube 232 is connected to the hollow cavity 231. One end of the liquid adding tube 232 is connected to the additive source. Therefore, when the additive solution is introduced into the liquid adding tube 232, the additive solution enters the hollow cavity 231, and then is diverted through two liquid separation channels 222 and an intermediate nozzle 211, so that the intermediate nozzle 211 sprays the additive, and the additive in the liquid separation channel 222 enters the mounting rod nozzle 221 through the branch end, and then is sprayed out from the mounting rod nozzle 221.

[0048] In order to make the fiber filaments thrown out by the spinning roller gather toward the middle by adjusting the spraying angle of the mounting rod nozzle 221;

[0049] Please refer to Figure 2 and 3 The mounting seat 21 is provided with an adjustment mechanism 3 for adjusting the angle between the two mounting rods 22. The two mounting rods 22 located on the same straight line are arranged roughly in a V shape after being adjusted by the adjustment mechanism 3, and the angle formed is between about 120 degrees and 170 degrees.

[0050] The adjusting mechanism 3 includes a bidirectional screw 31 rotatably mounted on the mounting seat 21, and a hexagonal driving head 311 is provided at one end of the bidirectional screw 31, so that the bidirectional screw 31 can be rotated with the help of a screwing tool. A guide rod 32 is fixedly mounted on the mounting seat 21, and two opposite threads of the bidirectional screw 31 are threadedly connected with sliding blocks 33, and the sliding blocks 33 are slidably connected with the guide rod 32, so that when the bidirectional screw 31 is rotated, the rotation of the sliding blocks 33 is restricted, and the rotational motion of the bidirectional screw 31 is converted into a linear motion of the sliding blocks 33 along the axial direction of the bidirectional screw 31, and the two sliding blocks 33 move synchronously in opposite directions or in opposite directions;

[0051] A connecting rod 34 is installed on the mounting rod 22 through an axial rotation, and the other end of the connecting rod 34 is also hinged to the sliding block 33 through an axial connection. The hexagonal driving head 311 is rotated by a wrench, so that the bidirectional screw 31 is rotated, and the sliding block 33 slides along the guide rod 32, so that the connecting rod 34 moves. The connecting rod 34 pushes the mounting rod 22 to rotate with the rotating shaft 23 as the rotation axis, thereby changing the angle of the mounting rod nozzle 221. When the mounting rod nozzles 221 on the two mounting rods 22 are tilted inward, when the mounting rod nozzle 221 sprays additives, the gas flow speed along the axis of the middle nozzle 211 will be greater, so that the fibers are gathered in the axis direction of the middle nozzle 211, thereby avoiding the large diffusion area of ​​the fibers that makes them inconvenient to collect.

[0052] Continue to refer to Figure 2 The flow rates of the three mounting rod nozzles 221 on the mounting rod 22 are different. The flow rate of the mounting rod nozzle 221 close to the middle nozzle 211 is larger, and the flow rate of the mounting rod nozzle 221 far away from the middle nozzle 211 is smaller, that is, the flow area of ​​the spray port of the mounting rod nozzle 221 far away from the middle nozzle 211 is smaller, so the farther the mounting rod nozzle 221 is from the middle nozzle 211, the smaller the spray volume is, so that the gas flow speed in the axial direction of the middle nozzle 211 is greater, that is, the pressure close to the axial position of the middle nozzle 211 is less than the pressure far away from the axial position of the middle nozzle 211, so that the thrown fibers are gathered in the axial direction of the middle nozzle 211.

[0053] Please refer to Figure 6 and 7 In order to adjust the inclination angle of the mounting rod 22 up and down, a mounting plate 41 is hinged on the mounting seat 21, and the mounting plate 41 is fixedly installed on the wire spinning machine 1. Connecting rods 42 are hinged on both sides of the mounting seat 21, and a slider 43 is hinged on the other end of the connecting rod 42. Two slideways are provided on the mounting plate 41, and the two sliders 43 are respectively slidably installed in the slideways. The two connecting rods 42 are symmetrically arranged about the mounting seat 21, and the two sliders 43 are also symmetrically arranged about the mounting seat 21. A screw rod 44 is rotatably installed in the slideway, and the slider 43 is threadedly connected to the screw 44. Synchronous wheels 45 are coaxially fixedly installed on the two screws 44, and a synchronous belt 46 is installed between the two synchronous wheels 45 for transmission, so as to transmit the rotational motion of one screw rod 44 to the other screw 44;

[0054] The threads on the two screw rods 44 have the same rotation direction. A driving head 47 is installed on the top of one of the screw rods 44. The driving head 47 is rotated with the screw rod 44 through a wrench, and the two screw rods 44 are rotated synchronously through a synchronous wheel 45 and a synchronous belt 46, so that the two sliders 43 are lifted and lowered synchronously, so that the connecting rod 42 pushes the mounting seat 21 to rotate, so that the middle nozzle 211 and the mounting rod nozzle 221 are no longer horizontal, but are tilted upward, so that there is an oblique upward thrust on the thrown fiber, thereby avoiding too much fiber falling on the ground.

[0055] Working principle: The driving head 47 is rotated with the screw rod 44 through a wrench, and the two screw rods 44 are rotated synchronously through the synchronous wheel 45 and the synchronous belt 46, so that the two sliders 43 are lifted and lowered synchronously, so that the connecting rod 42 pushes the mounting seat 21 to rotate, thereby adjusting the angle between the mounting seat 21 and the mounting plate 41, thereby adjusting the upward inclination angle of the intermediate nozzle 211 and the mounting rod nozzle 221, and then the hexagonal driving head 311 is rotated through a wrench, so that the bidirectional screw rod 31 is rotated, and the sliding block 33 slides along the guide rod 32, so that the connecting rod 34 moves, and the connecting rod 34 pushes the mounting rod 22 to rotate with the rotating shaft 23 as the rotation axis, thereby changing the angle between the mounting rod nozzle 221 and the axis of the intermediate nozzle 211, so that when the mounting rod nozzle 221 and the intermediate nozzle 211 spray additives, the ejected fibers are gathered at the axis of the intermediate nozzle 211, and an upward thrust is applied to the fibers, thereby avoiding the large range of fiber diffusion in the space that makes it inconvenient to collect.

[0056] Embodiment 2:

[0057] like Figure 8 and 9 As shown, this embodiment is similar to the first embodiment, except that an adjustment mechanism 3 of a different structure is provided. In this embodiment, the adjustment mechanism 3 includes two driving rods 35, one end of each of the two driving rods 35 is hinged to two mounting rods 22, respectively, a slot 351 is provided in the length direction of the driving rod 35, a rack 352 is fixedly provided in the slot 351, and the rack 352 is provided on a side wall of the slot 351 and arranged along the length direction of the driving rod 35;

[0058] A gear 36 is rotatably mounted on the mounting seat 21 via a bearing. The gear 36 passes through the notches 351 on the two driving rods 35 and meshes with the two racks 352. The diameter of the tooth top circle of the gear 36 is slightly smaller than the width of the notches 351, thereby preventing the gear 36 from being disengaged from the racks 352. When the gear 36 rotates, the two racks 352 move in different directions. The rotating gear 36 causes the racks 352 to move with the driving rod 35, thereby causing the mounting rod 22 to rotate with the axis of the rotating shaft 23 as the rotation axis, thereby changing the size of the angle between the axis of the mounting rod nozzle 221 and the axis of the middle nozzle 211.

[0059] Please refer to Figure 10-12 , a receiving groove 21a is provided at the top of the mounting seat 21, and a docking block 37 is installed at the opening of the receiving groove 21a. The docking block 37 is spliced ​​by a left docking block 371 and a right docking block 372. An insert block 373 is fixedly provided on the left docking block 371, and a matching slot 374 is provided at the corresponding position of the right docking block 372. A through hole is provided in the middle of the docking block 37, and the bottom end of the gear 36 is rotatably installed in the through hole. A hexagonal prism-shaped mounting hole 36a is provided at the axis of the gear 36, and a hexagonal prism-shaped sliding column 38 is slidably installed up and down in the mounting hole 36a. The size of the upper half of the sliding column 38 is larger than that of the lower half, and a spring 381 is sleeved on the lower half of the sliding column 38. The shape of the mounting hole 36a is adapted to the shape of the sliding column 38, that is, the size of the upper half of the mounting hole 36a is larger than that of the lower half. When the sliding column 38 is inserted into the mounting hole 36a, the bottom end of the spring 381 is in contact with the mounting hole 36a. The step in the middle of the mounting hole 36a abuts against each other, the top of the spring 381 abuts against the step in the middle of the sliding column 38, the bottom end of the sliding column 38 extends out of the mounting hole 36a and is fixedly installed with a clutch disk 39, the upper surface of the clutch disk 39 is provided with a circumferential array of raised strips 391, and the lower surface of the docking block 37 is provided with a groove 375 adapted to the raised strips 391. When there is no external force, the sliding column 38 causes the clutch disk 39 to abut against the docking block 37 under the action of the spring 381, so that the raised strip 391 enters the groove 375. At this time, the clutch disk 39 and the docking block 37 are in a meshing state to prevent the gear 36 from rotating. When it is necessary to rotate the gear 36, the hexagonal wrench is inserted into the mounting hole 36a, so that the sliding column 38 descends, thereby separating the clutch disk 39 from the docking block 37, that is, the clutch disk 39 and the docking block 37 are in a disengaged state, and the gear 36 can be rotated by rotating the hexagonal wrench again.

[0060] Working principle: insert the hexagonal wrench into the mounting hole 36a to lower the sliding column 38, thereby separating the clutch plate 39 from the docking block 37, and then rotating the hexagonal wrench to rotate the gear 36. This arrangement can prevent the gear 36 from rotating on its own, thereby preventing the angle of the mounting rod 22 from changing. When the gear 36 rotates, the two racks 352 move in different directions. Rotating the gear 36 causes the rack 352 to move with the driving rod 35, so that the mounting rod 22 rotates with the axis of the rotating shaft 23 as the rotation axis, thereby changing the size of the angle between the axis of the mounting rod nozzle 221 and the axis of the intermediate nozzle 211.

[0061] Embodiment three:

[0062] like Fig.13 and 14As shown, this embodiment is similar to the second embodiment, except that the liquid separation channel 222 arranged inside the mounting rod 22 is divided into a first liquid separation channel 2221 and a second liquid separation channel 2222 which are not connected. The first mounting rod nozzle 221a close to the rotating shaft 23 is connected to the first liquid separation channel 2221, and the two second mounting rod nozzles 221b far away from the rotating shaft 23 are connected to the second liquid separation channel 2222. An air blowing pipe 223 connected to the second liquid separation channel 2222 is installed on the mounting rod 22, and an air pump is installed on the other end of the air blowing pipe 223. Therefore, when the spinning roller 11 rotates to throw the fiber off, the amount of fiber close to the axis of the middle nozzle 211 is relatively large. Therefore, the first mounting rod nozzle 221a and the middle nozzle 211 spray additives, and the second mounting rod nozzle 221b sprays air to make the scattered fibers close to the axis of the middle nozzle 211, thereby avoiding waste caused by excessive spraying of additives and low utilization rate.

[0063] The above-mentioned material adding device is applied to a production system of an inorganic refractory fiberboard. The production system of an inorganic refractory fiberboard includes a mixing device, an electric melting furnace, a spinning machine 1, a cotton collector, a needle punching machine, a slitting machine and a calcining kiln. The spinning machine 1 is equipped with a material adding device. The mixing device is used to mix the raw materials. The mixed raw materials are put into the electric melting furnace to melt into a liquid state, and then the liquid material flows into the spinning roller 11 in strands. The spinning roller 11 rotates at a high speed to spin the material to form fibers. At the same time, the material adding device sprays additives on the swung fibers, and then the cotton collector collects the fibers onto a conveyor belt. The movement of the conveyor belt allows the fibers to reach the needle punching machine for the needle punching step. After the needle punching is completed, large pieces of material are formed. Afterwards, the slitting machine cuts the large pieces of material into fiberboards of a certain size. Finally, the fiberboards are put into the calcining kiln for calcination. After calcination, the finished inorganic refractory fiberboard is obtained.

[0064] A process for preparing an inorganic refractory fiberboard comprises the following steps:

[0065] Step 1: Mix and melt the raw materials in proportion;

[0066] Step 2: Spinning the molten raw material into fibers, and spraying additives on the fibers by spraying while spinning, the additives consisting of coconut oil diethanolamide and silica sol;

[0067] Coconut oil diethanolamide plays a triple role in lubricating the fiber, reducing the electrostatic repulsion on the fiber surface and improving the adhesion of the fiber, while silica sol provides high temperature strength. The lubricating effect of coconut oil diethanolamide makes the fiber easier to shape, improves the needle punching effect, and can make the fibers better interwoven during the needle punching process; and its antistatic effect can make the fibers closer to each other, so that the fibers that contact the droplets due to surface tension in the heating pre-calcination process are getting closer and closer, and finally in the high temperature process, the silica sol forms a rigid chemical bond connection between the fibers that contact each other at the point where the droplets were originally located, so that the fiber products become hard at high temperature and have the function of maintaining shape, so that the large pieces of flexible fibers become hardened after calcination heat treatment and become a fiberboard with a certain rigid strength;

[0068] Step 3: Collect the fibers and conduct a needle punching process to produce large fiber blocks;

[0069] Step 4: sawing the large fiber block into fiber blocks of required size;

[0070] Step 5: pre-calcining the fiber block at a temperature of 600-1200° C. for a time of 100-300 minutes, in order to harden the fiber block and give it a certain rigidity.

[0071] Through the above preparation process, the following fiberboards are made by adding raw materials in different proportions:

[0072] Embodiment 1:

[0073] An inorganic fire-resistant fiberboard comprises the following raw materials by weight: 43-46 parts of aluminum oxide, 52-55 parts of silicon dioxide, and 0.1-1 parts of additives, wherein the additives are composed of coconut oil diethanolamide and silica sol, wherein the coconut oil diethanolamide accounts for 85-95% and the silica sol accounts for 15-5%.

[0074] Embodiment 2:

[0075] An inorganic refractory fiberboard comprises the following raw materials by weight: 33-37 parts of aluminum oxide, 43-59 parts of silicon dioxide, 4-20 parts of zirconium dioxide and 0.1-1 parts of additives, wherein the additives are composed of coconut oil diethanolamide and silica sol, wherein the coconut oil diethanolamide accounts for 85-95% and the silica sol accounts for 15-5%.

[0076] Embodiment three:

[0077] An inorganic fire-resistant fiberboard comprises the following raw materials by weight: 20-33 parts of calcium oxide, 62-69 parts of silicon dioxide, 3-7 parts of magnesium oxide, and 0.1-1 parts of additives, wherein the additives are composed of coconut oil diethanolamide and silica sol, wherein the coconut oil diethanolamide accounts for 85-95% and the silica sol accounts for 15-5%.

[0078] Embodiment 4:

[0079] An inorganic fire-resistant fiberboard comprises the following raw materials in parts by weight: 20-33 parts of calcium oxide, 62-69 parts of silicon dioxide, 3-7 parts of magnesium oxide, 4-6 parts of zirconium dioxide and 0.1-1 parts of additives, wherein the additives are composed of coconut oil diethanolamide and silica sol, wherein the coconut oil diethanolamide accounts for 85-95% and the silica sol accounts for 15-5%.

[0080] The properties of fiberboard 1, fiberboard 2, fiberboard 3 and fiberboard 4 made from the above four embodiments are shown in the following table:

[0081]

[0082] The properties of wet organic refractory fiberboard and flexible refractory fiber block prepared by prior art are as follows:

[0083]

[0084] It can be seen from the above table that the content of organic matter in the fiberboard provided by the present invention is much smaller than the organic matter content of the wet-process organic refractory fiberboard in the prior art. Therefore, the fiberboard provided by the present invention has a lower density and a lower bulk density than the refractory fiberboard made by the conventional wet process, which is more advantageous for lightweight insulation materials of process equipment. The inorganic refractory fiberboard provided by the present invention has a semi-hard property, taking into account both the rigidity of the board and the flexibility of large fiber blocks, and therefore has a wide range of applications.

Claims

1. A material adding device, characterized in that: include: A mounting seat, on which a rotating shaft is fixedly mounted, a hollow cavity is arranged inside the rotating shaft, and one end of the rotating shaft is connected to a liquid adding pipe communicating with the hollow cavity, so as to facilitate conveying the working medium to the inside of the hollow cavity through the liquid adding pipe; The middle nozzle is mounted on the mounting seat and communicated with the hollow cavity so that the working medium can be axially ejected from the middle nozzle; Two mounting rods, one end of each mounting rod is mounted on the rotating shaft, a liquid separation channel is provided inside the mounting rod, and one end of the liquid separation channel is communicated with the hollow cavity inside the rotating shaft; A plurality of mounting rod nozzles are respectively mounted on two mounting rods and are connected to the liquid separation flow channel. The flow rate of the mounting rod nozzle close to the middle nozzle is larger, and the flow rate of the mounting rod nozzle far from the middle nozzle is smaller. The mounting seat is provided with an adjusting mechanism for adjusting the angle between the two mounting rods, including a bidirectional screw rotatably mounted on the mounting seat, one end of the bidirectional screw being provided with a hexagonal driving head, two opposite threads of the bidirectional screw being threadedly connected with sliding blocks, the sliding blocks can only slide along the length direction of the mounting seat, a connecting rod being rotatably mounted on the mounting rod, the other end of the connecting rod being hinged to the sliding block; The mounting plate is hinged to the mounting seat and fixedly mounted on the spinning machine, and an angle control mechanism for adjusting the inclination angle of the mounting seat is installed between the mounting plate and the mounting seat, which is used to tilt the nozzle upward, thereby exerting an oblique upward thrust on the swung fiber; the angle control mechanism comprises: connecting rods are hinged on both sides of the mounting seat, and a slider is hinged on the other end of the connecting rod. Two slideways are provided on the mounting plate, and the two sliders are respectively slidably mounted in the slideways, the two connecting rods are symmetrically arranged about the mounting seat, and the two sliders are also symmetrically arranged about the mounting seat. A screw is rotatably installed in the slideway, and the slider is threadedly connected to the screw. Synchronous wheels are coaxially fixedly installed on the two screws, and a synchronous belt is installed for transmission between the two synchronous wheels. The threads on the two screws have the same rotation direction, and a driving head is installed on the top of one of the screws.

2. An inorganic refractory fiberboard production system, characterized in that: It comprises a mixing device, an electric melting furnace, a spinning machine, a cotton collector, a needle punching machine, a slitting machine and a calcining kiln. The spinning machine is equipped with a material adding device as claimed in claim 1, so that the additive can be sprayed on the fibers swung out of the spinning machine in an atomized form.

3. A process for preparing an inorganic refractory fiberboard, characterized in that: The following steps are involved: Step 1: Mix and melt the raw materials in proportion; Step 2: spinning the molten raw material into fibers, and spraying additives on the fibers in a spraying manner through the material adding device as claimed in claim 1 during spinning; Step 3: Collect the fibers and conduct a needle punching process to produce large fiber blocks; Step 4: sawing the fiber block into fiber blocks of required size; Step 5: pre-calcining the fiber block by heating, with the calcination temperature being 600-1200° C. and the calcination time being 100-300 minutes.

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