Preparation method of silicate fiber density board for indoor decoration
High-density silicate fiberboard was prepared by using a three-stage hot pressing process and waste residue recycling, which solved the problems of low density and insufficient mechanical strength of silicate fiberboard and achieved high strength and fire resistance of interior decorative panels.
Patent Information
- Application Number
- CN202410629889.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-11-21
Smart Images
Figure CN120985784A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building refractory materials technology, specifically to a method for preparing silicate fiber density board for interior decoration. Background Technology
[0002] Most interior decorative panels are made of wood-based materials such as MDF, engineered wood, and plywood. These types of panels have almost no fire-retardant properties and poor mechanical strength, making them prone to deformation. Silicate fiberboard, on the other hand, is made primarily from natural minerals through high-temperature melting, fiberization, and pressing. It possesses excellent heat insulation, sound insulation, and fire resistance properties and is widely used in construction and industrial fields.
[0003] Currently, silicate fiberboard is mostly used as a thermal insulation material. Due to its thermal insulation properties, the internal structure of the board is loose and porous, resulting in low density and insufficient mechanical strength for interior decorative panels. To improve the low density and insufficient mechanical strength of existing silicate fiberboard, and to address the issue of existing interior decorative panels not being fireproof and flame-retardant, a multi-stage hot-pressing process is used to improve the density and mechanical properties of silicate fiberboard. Summary of the Invention
[0004] To address the aforementioned problems, this invention proposes a method for preparing high-density interior decorative panels with excellent mechanical strength using silicate as the main raw material and waste residue as an auxiliary material through a three-stage hot-pressing process.
[0005] The technical solution adopted in this invention is: a method for preparing silicate fiber density board for interior decoration, the detailed steps of which include: Material preparation and melting: The raw materials are mixed and dried, and then put into an electric furnace to melt them; Centrifugal fiber forming: The molten slurry flows out of the furnace and is spun into fibers at high speed by a centrifuge; Cotton shredding and baling: The fibers are processed into raw cotton felt, and the raw cotton felt is shredded into cotton strips. The cotton strips are then granulated, weighed, and baled to form bulk cotton stacks. Cotton unpacking and sizing: Collect the lumpy cotton piles and break them down into granular cotton particles, then spray adhesive onto the granular cotton particles; Pre-pressing with cotton: Cold pressing the fibrous material after sizing to form a fiberboard blank; Cutting and Inspection: After cold pressing, the fiberboard blank enters the cutting equipment to cut the blank; Three-stage hot pressing: The cut fiberboard blank is subjected to three-stage hot pressing. The first stage hot pressing temperature is 240~260℃ and the hot pressing time is 8~12min. The second stage hot pressing temperature is 215~225℃ and the hot pressing time is 15~20min. The third stage hot pressing temperature is 190~210℃ and the hot pressing time is 15~20min. Cooling and Packaging: After hot pressing, the fiber density board is transported by belt to cool and then stacked and packaged.
[0006] Among these processes, pre-pressing with cotton can improve the density of the fiberboard blank, reducing the possibility of loosening and edge collapse. In the three-stage hot pressing, the first stage initially solidifies the blank and further improves its density. During this stage, the phenolic resin in the shallow layer of the blank rapidly solidifies at high temperatures, and the shorter pressing time prevents scorching, thus improving the surface strength of the fiberboard. The second stage further promotes internal solidification of the fiberboard. The lower pressing temperature and longer pressing time ensure sufficient reaction and solidification of the deeper phenolic resin, improving the internal strength of the fiberboard. The third stage further reduces the pressing temperature, ensuring overall solidification while providing insulation. This is because stress exists within the fiberboard during rapid solidification; insulation releases and eliminates some of this stress, preventing it from affecting the fiberboard's performance, thereby improving its mechanical strength and increasing product quality and yield.
[0007] Furthermore, the raw materials for silicate fiber density board include main raw materials and batch materials; the main raw material is silicate, and the batch materials are dolomite, nickel-iron slag and blast furnace slag, with the following proportions of each component in the raw materials: silicate 40-50 parts, dolomite 25-30 parts, nickel-iron slag 10-15 parts and blast furnace slag 10-15 parts.
[0008] Furthermore, the adhesive used in the cotton uncoating and sizing step includes phenolic resin, silane water-repellent agent, and dust-proofing oil, with a mass ratio of phenolic resin, silane water-repellent agent, and dust-proofing oil of 70:10:1.
[0009] Furthermore, the specific steps of material preparation and melting are as follows: the raw materials are fed into the feeding hopper by the dump truck and transported to the daily use warehouse for temporary storage. Before the start of melting, the main raw materials and batch materials are weighed and then forcibly mixed. After the mixture is dried and dusted, it is transported to the kiln head silo for temporary storage. When proceeding to the next step, the dried and dusted mixture is weighed and put into the melting furnace for melting.
[0010] Furthermore, the centrifugal fiber forming step is as follows: the mixed melt flowing out of the melting furnace is guided to the centrifuge through a movable chute. The melt is rotated at high speed in the centrifuge and stretched into fibers under the action of the blower. At the same time, dust-proof oil is evenly sprayed on the fiber surface. The centrifuge speed is not less than 4000 r / min.
[0011] Furthermore, the cotton tearing and baling steps are completed by the cotton processing system, which consists of a cotton collecting drum, a cotton tearing machine, a cotton drawing machine, a cyclone separator, a rotating screen, a slag remover, a belt conveyor, and a baling machine.
[0012] Furthermore, the cotton processing system's collecting drum processes the fibers sent from the centrifuge into raw cotton felt, and then the raw cotton felt is torn into cotton strips by the cotton shredder, which fall onto the belt conveyor. The cotton strips are then drawn into the cyclone by the cotton extractor through the suction conveyor pipe, granulated by the rotating shaft screen and deslag removed by the deslag remover, weighed by the weighing belt conveyor and sent to the baling machine, where the granular cotton is then baled to form block cotton stacks.
[0013] Processing granular cotton into bulk cotton stacks makes it easier to transport and store.
[0014] Furthermore, in the cotton unpacking and sizing step, the packaged block cotton stacks are vibrated and pressurized to break them down into granular cotton particles, which are then carried by airflow into the cyclone mixing chamber. The sizing device sprays adhesive through airflow, making it evenly adhere to the granular cotton particles. Subsequently, the mixture of granular cotton particles and adhesive spirals down the inner wall of the cyclone to the bottom of the chamber, where the granular cotton particles and adhesive are mixed again by a stirrer.
[0015] Furthermore, the cotton pre-pressing step is as follows: the material leveler throws the sizing granular cotton particles from the center to both sides, and the material spreader makes the sizing granular cotton particles evenly spread on the throwing roller in the settling and forming chamber, and then sends them into the hydraulic cold press for pre-pressing to form a fiberboard blank.
[0016] Furthermore, in the cotton-laying pre-compression step, the pre-compression pressure is 0.8~1.3MPa, and the pre-compression time is 1~3min.
[0017] The beneficial effects of this invention are: This invention provides a method for preparing silicate fiber density board for interior decoration. This method recycles waste residue, which reduces production costs to a certain extent and is energy-saving and environmentally friendly. The prepared fiber density board has excellent performance in terms of tensile strength, compressive strength, shear strength and shear modulus, which improves the problems of low density and insufficient mechanical strength of existing silicate fiber boards and improves the product quality and pass rate of fiber density board. Attached Figure Description
[0018] Figure 1 This is a process flow diagram for the preparation of silicate fiber density board.
[0019] Figure 2 This is a schematic diagram of the centrifugal fiber forming process.
[0020] Figure 3 This is a diagram illustrating the steps of tearing and packing cotton.
[0021] Figure 4 A schematic diagram of the cotton unpacking, sizing, and pre-compression steps.
[0022] Explanation of reference numerals in the attached drawings: 1-Bagging machine; 2-Cyclone; 3-Slag remover; 4-Cotton extractor; 5-Rotating screen; 7-Cotton shredder; 8-Cotton collecting drum; 9-Air conveying device; 10-Glue application device; 11-Cyclone mixing chamber; 12-Pulverizer; 13-Paper spreading machine; 14-Spreading roller; 15-Settling and forming chamber. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and a preferred embodiment.
[0024] The process flow diagram for the preparation of silicate fiber density board is shown below. Figure 1 . Example 1.
[0025] Material preparation and melting: 50 parts of silicate, 25 parts of dolomite, 12 parts of nickel-iron slag, and 13 parts of blast furnace slag are fed into the electric melting furnace for melting.
[0026] Centrifugal fiber formation: The molten metal flowing from the electric melting furnace falls onto a four-roll centrifuge, where it is drawn into fibers at a speed exceeding 4500 r / min and under the action of a blower. Simultaneously, dust-proof oil is evenly sprayed onto the fiber surface (see...). Figure 2 ).
[0027] Cotton shredding and baling: Subsequently, the fibers are collected by the cotton collecting drum 8 into initial cotton felt, which is then conveyed by belt to the cotton shredder 7. The cotton shredder 7 shreds the initial cotton felt into cotton strips, which are then conveyed by the cotton extractor 4 through the suction conveyor pipe into the cyclone separator 2, and further into the rotating screen 5 to granulate into granular cotton. After the granular cotton is descaled by the descaling device 3, it is conveyed to the baling machine 1, where it is weighed according to the specification of 1200*1200mm and baled into blocks (see...). Figure 3 ).
[0028] Cotton unpacking and sizing: The granular cotton stacks, packaged into blocks, are vibrated and pressurized to break them down into granular cotton particles. These particles are then carried by an air conveyor 9 into a cyclone mixing chamber 11. At this point, a mist spraying sizing device 10 sprays a proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proofing oil in a mass ratio of 70:10:1) onto the granular cotton particles. The mixture of granular cotton particles and adhesive then spirals down the inner wall of the cyclone mixing chamber 11 to the bottom, where it is further mixed by an agitator. After mixing, a leveling machine 12 throws the sizing granular cotton particles from the center outwards. A spreading machine 13 then evenly spreads the sizing granular cotton particles onto the spreading rollers 14 in the settling and forming chamber 15, before finally feeding them into a cold press.
[0029] Pre-compression of cotton: The sizing granular cotton particles are fed into a hydraulic cold press for pre-compression at a pressure of 1.0 MPa for 2.5 minutes to form a fiberboard blank (see...). Figure 4 ).
[0030] Cutting inspection: Cut the fiberboard blank.
[0031] Three-stage hot pressing: The cut fiberboard blank is fed into a three-stage hot pressing forming equipment. The temperature and time of the three-stage hot pressing are 260℃ for 8 minutes; 225℃ for 15 minutes; and 210℃ for 15 minutes.
[0032] Cooling and Packaging: After hot pressing, the fiber density board is transported by belt for cooling, then stacked and packaged to produce silicate fiber density board. Example 2.
[0033] Material preparation and melting: 40 parts of silicate, 30 parts of dolomite, 15 parts of nickel-iron slag and 15 parts of blast furnace slag are fed into the electric melting furnace for melting.
[0034] Centrifugal fiber formation: The molten material flowing out of the electric furnace falls onto a four-roll centrifuge, where it is drawn into fibers at a speed of over 4500 r / min and under the action of a blower. At the same time, dust-proof oil is evenly sprayed onto the fiber surface.
[0035] Cotton tearing and baling: Subsequently, the fibers are collected by the cotton collecting drum 8 into initial cotton felt, which is then conveyed by belt to the cotton tearing machine 7. The cotton tearing machine 7 tears the initial cotton felt into cotton strips, which are then conveyed by the cotton extractor 4 through the suction conveying pipe into the cyclone 2, and then into the rotating screen 5 to be granulated into granular cotton. After the slag is removed by the slag remover 3, the granular cotton is conveyed to the baling machine 1, where it is weighed according to the specification of 1200*1200mm and baled into blocks.
[0036] Cotton unpacking and sizing: The granular cotton stacks, packaged into blocks, are vibrated and pressurized to break them down into granular cotton particles. These particles are then carried by an air conveyor 9 into a cyclone mixing chamber 11. At this point, a mist spraying sizing device 10 sprays a proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proofing oil in a mass ratio of 70:10:1) onto the granular cotton particles. The mixture of granular cotton particles and adhesive then spirals down the inner wall of the cyclone mixing chamber 11 to the bottom, where it is further mixed by an agitator. After mixing, a leveling machine 12 throws the sizing granular cotton particles from the center outwards. A spreading machine 13 then evenly spreads the sizing granular cotton particles onto the spreading rollers 14 in the settling and forming chamber 15, before finally feeding them into a cold press.
[0037] Pre-compression of cotton: The granular cotton particles after sizing are fed into a hydraulic cold press for pre-compression. The pre-compression pressure is 1.0 MPa and the pre-compression time is 2.5 min to form a fiberboard blank.
[0038] Cutting inspection: Cut the fiberboard blank.
[0039] Three-stage hot pressing: Finally, the fiberboard blank is fed into a three-stage hot pressing molding equipment. The temperature and time of the three-stage hot pressing are 240℃, 12min; 215℃, 20min; and 190℃, 20min, respectively.
[0040] Cooling and Packaging: After hot pressing, the fiber density board is transported by belt for cooling, then stacked and packaged to produce silicate fiber density board. Example 3.
[0041] Material preparation and melting: 50 parts silicate, 30 parts dolomite, 10 parts nickel-iron slag, and 10 parts blast furnace slag are fed into the electric melting furnace for melting.
[0042] Centrifugal fiber formation: The molten material flowing out of the electric furnace falls onto a four-roll centrifuge, where it is drawn into fibers at a speed of over 4500 r / min and under the action of a blower. At the same time, dust-proof oil is evenly sprayed onto the fiber surface.
[0043] Cotton tearing and baling: Subsequently, the fibers are collected by the cotton collecting drum 8 into initial cotton felt, which is then conveyed by belt to the cotton tearing machine 7. The cotton tearing machine 7 tears the initial cotton felt into cotton strips, which are then conveyed by the cotton extractor 4 through the suction conveying pipe into the cyclone 2, and then into the rotating screen 5 to be granulated into granular cotton. After the slag is removed by the slag remover 3, the granular cotton is conveyed to the baling machine 1, where it is weighed according to the specification of 1200*1200mm and baled into blocks.
[0044] Cotton unpacking and sizing: The granular cotton stacks, packaged into blocks, are vibrated and pressurized to break them down into granular cotton particles. These particles are then carried by an air conveyor 9 into a cyclone mixing chamber 11. At this point, a mist spraying sizing device 10 sprays a proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proofing oil in a mass ratio of 70:10:1) onto the granular cotton particles. The mixture of granular cotton particles and adhesive then spirals down the inner wall of the cyclone mixing chamber 11 to the bottom, where it is further mixed by an agitator. After mixing, a leveling machine 12 throws the sizing granular cotton particles from the center outwards. A spreading machine 13 then evenly spreads the sizing granular cotton particles onto the spreading rollers 14 in the settling and forming chamber 15, before finally feeding them into a cold press.
[0045] Pre-compression of cotton: The granular cotton particles after sizing are fed into a hydraulic cold press for pre-compression. The pre-compression pressure is 1.0 MPa and the pre-compression time is 2.5 min to form a fiberboard blank.
[0046] Cutting inspection: Cut the fiberboard blank.
[0047] Three-stage hot pressing: Finally, the fiberboard blank is fed into a three-stage hot pressing molding equipment. The temperature and time of the three-stage hot pressing are 250℃, 10min; 220℃, 17min; and 200℃, 18min, respectively.
[0048] Cooling and Packaging: After hot pressing, the fiber density board is transported by belt for cooling, then stacked and packaged to produce silicate fiber density board. Example 4.
[0049] Material preparation and melting: 45 parts silicate, 25 parts dolomite, 15 parts nickel-iron slag, and 15 parts blast furnace slag are fed into the electric melting furnace for melting.
[0050] Centrifugal fiber formation: The molten material flowing out of the electric furnace falls onto a four-roll centrifuge, where it is drawn into fibers at a speed of over 4500 r / min and under the action of a blower. At the same time, dust-proof oil is evenly sprayed onto the fiber surface.
[0051] Cotton tearing and baling: Subsequently, the fibers are collected by the cotton collecting drum 8 into initial cotton felt, which is then conveyed by belt to the cotton tearing machine 7. The cotton tearing machine 7 tears the initial cotton felt into cotton strips, which are then conveyed by the cotton extractor 4 through the suction conveying pipe into the cyclone 2, and then into the rotating screen 5 to be granulated into granular cotton. After the slag is removed by the slag remover 3, the granular cotton is conveyed to the baling machine 1, where it is weighed according to the specification of 1200*1200mm and baled into blocks.
[0052] Cotton unpacking and sizing: The granular cotton stacks, packaged into blocks, are vibrated and pressurized to break them down into granular cotton particles. These particles are then carried by an air conveyor 9 into a cyclone mixing chamber 11. At this point, a mist spraying sizing device 10 sprays a proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proofing oil in a mass ratio of 70:10:1) onto the granular cotton particles. The mixture of granular cotton particles and adhesive then spirals down the inner wall of the cyclone mixing chamber 11 to the bottom, where it is further mixed by an agitator. After mixing, a leveling machine 12 throws the sizing granular cotton particles from the center outwards. A spreading machine 13 then evenly spreads the sizing granular cotton particles onto the spreading rollers 14 in the settling and forming chamber 15, before finally feeding them into a cold press.
[0053] Pre-compression of cotton: The granular cotton particles after sizing are fed into a hydraulic cold press for pre-compression. The pre-compression pressure is 1.0 MPa and the pre-compression time is 2.5 min to form a fiberboard blank.
[0054] Cutting inspection: Cut the fiberboard blank.
[0055] Three-stage hot pressing: Finally, the fiberboard blank is fed into a three-stage hot pressing molding equipment. The temperature and time of the three-stage hot pressing are 250℃, 10min; 220℃, 17min; and 200℃, 18min, respectively.
[0056] Cooling and Packaging: After hot pressing, the fiber density board is transported by belt for cooling, then stacked and packaged to produce silicate fiber density board. Example 5.
[0057] Material preparation and melting: 50 parts of silicate, 27 parts of dolomite, 13 parts of nickel-iron slag, and 10 parts of blast furnace slag are fed into the electric melting furnace for melting.
[0058] Centrifugal fiber formation: The molten material flowing out of the electric furnace falls onto a four-roll centrifuge, where it is drawn into fibers at a speed of over 4500 r / min and under the action of a blower. At the same time, dust-proof oil is evenly sprayed onto the fiber surface.
[0059] Cotton tearing and baling: Subsequently, the fibers are collected by the cotton collecting drum 8 into initial cotton felt, which is then conveyed by belt to the cotton tearing machine 7. The cotton tearing machine 7 tears the initial cotton felt into cotton strips, which are then conveyed by the cotton extractor 4 through the suction conveying pipe into the cyclone 2, and then into the rotating screen 5 to be granulated into granular cotton. After the slag is removed by the slag remover 3, the granular cotton is conveyed to the baling machine 1, where it is weighed according to the specification of 1200*1200mm and baled into blocks.
[0060] Cotton unpacking and sizing: The granular cotton stacks, packaged into blocks, are vibrated and pressurized to break them down into granular cotton particles. These particles are then carried by an air conveyor 9 into a cyclone mixing chamber 11. At this point, a mist spraying sizing device 10 sprays a proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proofing oil in a mass ratio of 70:10:1) onto the granular cotton particles. The mixture of granular cotton particles and adhesive then spirals down the inner wall of the cyclone mixing chamber 11 to the bottom, where it is further mixed by an agitator. After mixing, a leveling machine 12 throws the sizing granular cotton particles from the center outwards. A spreading machine 13 then evenly spreads the sizing granular cotton particles onto the spreading rollers 14 in the settling and forming chamber 15, before finally feeding them into a cold press.
[0061] Pre-compression of cotton: The granular cotton particles after sizing are fed into a hydraulic cold press for pre-compression. The pre-compression pressure is 1.0 MPa and the pre-compression time is 2.5 min to form a fiberboard blank.
[0062] Cutting inspection: Cut the fiberboard blank.
[0063] Three-stage hot pressing: Finally, the fiberboard blank is fed into a three-stage hot pressing molding equipment. The temperature and time of the three-stage hot pressing are 250℃, 10min; 220℃, 17min; and 200℃, 18min, respectively.
[0064] Cooling and Packaging: After hot pressing, the fiber density board is transported by belt for cooling, then stacked and packaged to produce silicate fiber density board.
[0065] Comparative Example 1 uses commercially available ordinary board material (model GY-180). The mechanical properties of the silicate fiber density boards prepared in Examples 1-5 and commercially available boards were tested, and the results are shown in Table 1: Table 1: Mechanical Performance Tests Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Static bending strength (kPa) 48 42 47 47 49 20 Elastic modulus (kPa) 56 51 55 55 56 38 Internal bond strength (KPa) 0.45 0.43 0.44 0.44 0.44 0.4 As shown in Table 1, the silicate fiber density boards prepared in Examples 1-5 exhibit superior performance in terms of static bending strength, elastic modulus, and internal bond strength. The silicate fiber density boards prepared using the method of this application improve the density and mechanical strength of existing silicate fiber boards, while also solving the problem that existing interior decorative density boards cannot be fireproof and flame-retardant.
[0066] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.
Claims
1. A method for producing a silicate fiber density board for interior decoration, characterized by, The method comprises the following steps: Preparation and melting: the raw materials are mixed and dried, and then melted; Centrifugal fiberization: the melted melt is spun into fibers by a centrifuge at high speed; Tearing and packaging: the fibers are processed into primary cotton felt, and the primary cotton felt is torn into cotton strips, granulated, weighed and packaged to form block-shaped cotton piles; Dissolving and sizing: the block-shaped cotton piles are collected and re-dispersed into granular cotton particles, and the granular cotton particles are sprayed with adhesive; Laying and pre-pressing: the sized fibrous material is cold-pressed to form a fiber mat; Cutting and testing: the cold-pressed fiber mat is cut; Three-stage hot pressing: the cut fiber mat is subjected to three-stage hot pressing, the first stage hot pressing temperature is 240-260℃, the hot pressing time is 8-12min, the second stage hot pressing temperature is 215-225℃, the hot pressing time is 15-20min, the third stage hot pressing temperature is 190-210℃, and the hot pressing time is 15-20min; Cooling and packaging: the hot-pressed fiber density board is stacked and packaged after cooling.
2. The method of producing a silicate fiber density board according to claim 1, characterized by, The raw materials of the silicate fiber density board include main raw materials and mixtures; the main raw materials are silicates, and the mixtures are dolomite, nickel-iron slag and blast furnace slag; the proportions of the components in the raw materials are 40-50 parts of silicates, 25-30 parts of dolomite, 10-15 parts of nickel-iron slag and 10-15 parts of blast furnace slag.
3. The production method according to claim 1 or 2, characterized by: The adhesive in the dissolving and sizing step comprises phenolic resin, silane water-repellent agent and dust-proof oil, and the mass ratio of the phenolic resin, silane water-repellent agent and dust-proof oil is 70:10:
1.
4. A method of manufacturing a silicate fiber density board for interior decoration according to claim 3, characterized in that: The preparation and melting step specifically comprises: the raw materials are sent into a feeding hopper by a self-unloading vehicle and are transported to a daily-use bin for temporary storage; the main raw materials and mixtures are weighed before melting starts, and then are forcibly mixed; the mixed materials are dried and dedusted, and then are transported to a kiln head bin for temporary storage; when the next step is performed, the dried and dedusted mixed materials are weighed and then are put into a melting furnace for melting.
5. A method of manufacturing a silicate fiber density board for interior decoration according to claim 4, characterized in that: The centrifugal fiberization step specifically comprises: the mixed melt flowed out of the melting furnace is guided to a centrifuge through a movable chute; the melt is spun at high speed by the centrifuge and is drawn into fibers under the action of a blowing fan; at the same time, the dust-proof oil is uniformly sprayed on the surface of the fibers; the rotation speed of the centrifuge is not less than 4000r / min.
6. A method of manufacturing a silicate fiber density board for interior decoration according to claim 5, characterized in that: The tearing and packaging step is completed by a cotton processing system which is composed of a cotton collecting drum, a tearing machine, a suction cotton machine, a cyclone drum, a rotating shaft sieve, a slag remover, a conveying belt and a packaging machine.
7. A method of manufacturing a silicate fiber density board for interior decoration according to claim 6, characterized in that: The cotton collecting drum of the cotton processing system processes the fibers sent out of the centrifuge into primary cotton felt, and tears the primary cotton felt into cotton strips through the tearing machine, and the cotton strips fall onto the conveying belt; the cotton strips are sucked into the cyclone drum through a suction conveying pipeline by the suction cotton machine; after being granulated by the rotating shaft sieve and deslagged by the slag remover, the cotton strips are weighed by a weighing belt machine and then are sent to the packaging machine; then the granular cotton is packaged to form block-shaped cotton piles.
8. A method of manufacturing a silicate fiber density board for interior decoration according to claim 7, characterized in that: In the dissolving and sizing step, the block-shaped cotton piles after packaging are re-dispersed into granular cotton particles by vibration and pressure, and then are wrapped by airflow through an air conveying device into a cyclone mixing bin; an adhesive is sprayed by an adhesive spraying device to make it uniformly adhere to the granular cotton particles; then the mixture of the granular cotton particles and the adhesive spirally sinks to the bottom of the cyclone mixing bin, and the granular cotton particles and the adhesive are mixed again by a stirrer.
9. A method of manufacturing a silicate fibre density board for interior decoration according to claim 8, characterized in that: The cotton pre-pressing step is as follows: the material leveler throws sizing cotton granules from the center to both sides, and the material spreader makes the sizing cotton granules evenly spread on the throwing roller in the settling and forming chamber. Then, it is sent into the hydraulic cold press for pre-pressing to form a fiberboard blank.
10. A method of manufacturing a silicate fiber density board for interior decoration according to claim 9, characterized in that: In the cotton-laying pre-compression step, the pre-compression pressure is 0.8~1.3MPa and the pre-compression time is 1~3min.