Preparation method for silicate fiber high density board for indoor decoration

Abstract

Disclosed in the present invention is a preparation method for a silicate fiber high density board for indoor decoration. The preparation method comprises the following steps: material preparation and melting; centrifugal fiber forming; cotton tearing and packaging; cotton opening and glue application; cotton spreading and pre-pressing; cutting and testing; three-stage hot pressing, involving: performing three-stage hot pressing on formed fiber board blanks, wherein the first-stage hot-pressing temperature is 240-260°C, the hot-pressing time is 8-12 mins, the second-stage hot-pressing temperature is 215-225°C, the hot pressing time is 15-20 mins, the third-stage hot pressing temperature is 190-210°C, and the hot pressing time is 15-20 mins; and cooling and packaging. In the method, waste residue is recycled, thereby reducing production costs to a certain extent, and achieving energy conservation and environmental protection; and the prepared fiber high density board has great performance in terms of tensile strength, compressive strength, shear strength and shear modulus, thereby solving the problems of low density and insufficient mechanical strength in existing silicate fiber boards.

Description

Preparation method of silicate fiber density board for interior decoration TECHNICAL FIELD

[0001] The present application relates to the technical field of building refractory materials, in particular to a preparation method of silicate fiber density board for interior decoration. BACKGROUND

[0002] The decorative boards for interior use are mostly wood-based density boards, integrated boards and adhesive boards, which almost have no fire-retardant and fireproof performance and poor mechanical strength, and are prone to deformation. The silicate fiber board is made of natural minerals as the main raw material, and is formed by high-temperature melting, fiberization and pressing, and has excellent heat insulation, sound insulation and fireproof performance, and is widely used in the fields of building and industry.

[0003] At present, the silicate fiber boards on the market are mostly used as heat insulation materials. Based on the characteristics of heat insulation, the internal structure of the board is loose and porous, which leads to low density and mechanical strength that does not meet the requirements of interior decorative boards. In order to improve the problems of low density and insufficient mechanical strength of the existing silicate fiber boards and solve the problem of non-fireproof and non-fire-retardant of the existing interior decorative boards on the market, the density and mechanical properties of the silicate fiber board are improved by a multi-stage hot pressing process. SUMMARY

[0004] To solve the above problems, the present application provides a method for preparing a high-density interior decorative board with excellent mechanical strength by using silicate as the main raw material and waste slag as the auxiliary material through a three-stage hot pressing process.

[0005] The technical scheme adopted by the present application is as follows: a preparation method of a silicate fiber density board for interior decoration, the detailed steps of which include:

[0006] Preparation of raw materials: the production raw materials are mixed and dried, and then put into an electric furnace for melting;

[0007] Centrifugal fiberization: the melted slurry flows out of the furnace body and is spun into fibers by a centrifugal machine at high speed;

[0008] Tearing and packaging: the fibers are processed into primary cotton felt, and the primary cotton felt is torn into cotton strips, the cotton strips are granulated, weighed and packaged to form block-shaped cotton piles;

[0009] Unraveling and gluing: the block-shaped cotton piles are collected and re-dispersed into granular cotton particles, and the granular cotton particles are sprayed with adhesive;

[0010] Laying and pre-pressing: the fibrous material after gluing is cold-pressed to form a fiber board blank;

[0011] Cutting and detection: the fiber board blank after cold pressing enters the cutting equipment and is cut;

[0012] Three-stage hot pressing: the cut fiber board blanks are 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℃, the hot pressing time is 15-20min;

[0013] Cooling and packaging: the hot-pressed fiber density board is transported by a belt to cool, and then stacked and packaged.

[0014] The pre-pressing of the laid cotton can improve the compactness of the fiber board blank and reduce the possibility of loose and edge collapse of the fiber board blank. In the three-stage hot pressing, the first stage hot pressing can preliminarily solidify the board blank and further improve the compactness of the fiber board blank. In this stage of hot pressing, the phenolic resin in the shallow layer of the fiber board blank rapidly solidifies at high temperature, and the short hot pressing time can avoid the phenolic resin in the shallow layer of the fiber board blank from being scorched, which is beneficial to improving the strength of the surface of the fiber board blank. The second stage hot pressing further promotes the internal solidification of the fiber board blank. In this stage of hot pressing, the hot pressing temperature is reduced and the hot pressing time is prolonged, which can ensure that the phenolic resin in the deep layer of the fiber board blank is fully reacted and solidified, and is beneficial to improving the strength of the internal fiber board blank. The third stage hot pressing further reduces the hot pressing temperature, which ensures the overall solidification of the fiber board blank and performs heat preservation on the fiber board blank. This is because there is stress in the fiber board blank during the rapid solidification and formation of the fiber board blank, and heat preservation can release and eliminate part of the internal stress, avoid its influence on the performance of the fiber board, thereby improving the mechanical strength of the fiber board blank and improving the product quality and qualification rate.

[0015] Further, 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 parts of each component in the raw materials are respectively 40-50 parts of silicate, 25-30 parts of dolomite, 10-15 parts of nickel-iron slag and 10-15 parts of blast furnace slag.

[0016] Further, the adhesive in the cotton opening and sizing step includes phenolic resin, silane water repellent and dust-proof oil, and the mass ratio of the phenolic resin, silane water repellent and dust-proof oil is 70:10:1.

[0017] Further, the material preparation and melting step is specifically as follows: the raw materials are sent into the feeding hopper by the self-unloading vehicle and are transported to the daily use bin for temporary storage. Before starting the melting, the main raw materials and the mixtures are weighed, and then are subjected to forced mixing. After drying and dedusting, the mixed materials are transported to the kiln head material bin for temporary storage, and then are weighed and put into the melting furnace for melting in the next operation.

[0018] Further, the centrifugal fiberizing step is specifically: the mixed melt flowed out from the smelting furnace is guided to the centrifuge through the movable chute, the melt is spun at high speed through the centrifuge and drawn into fibers under the action of the blowing fan, and the dustproof oil is uniformly sprayed on the surface of the fibers, wherein the rotating speed of the centrifuge is not less than 4000r / min.

[0019] Further, the cotton tearing and packing step is completed by a cotton processing system, and the cotton processing system is composed of a cotton collecting drum, a cotton tearing machine, a cotton suction machine, a cyclone drum, a rotating shaft sieve, a slag remover, a belt conveyor and a packing machine.

[0020] Further, the cotton collecting drum of the cotton processing system processes the fibers sent out by the centrifuge into primary cotton felt, and tears the primary cotton felt into cotton strips through the cotton tearing machine, and the cotton strips fall onto the belt conveyor, and the cotton strips are sucked into the cyclone drum through the suction conveying pipeline by the cotton suction machine, and the cotton strips are granulated by the rotating shaft sieve and deslagged by the slag remover, and then the cotton strips are weighed by the weighing belt machine and sent to the packing machine, and then the granular cotton is packed to form blocky cotton piles.

[0021] The granular cotton is processed into blocky cotton piles, and the blocky cotton piles can be more conveniently transported and stored.

[0022] Further, in the cotton opening and sizing step, the blocky cotton piles after being packed are re-dispersed into granular cotton particles by vibration and pressure, and then the granular cotton particles are entrained by airflow into the cyclone mixing bin, and the sizing device sprays the adhesive through the airflow to make the adhesive uniformly adhere to the granular cotton particles, and then the mixture of the granular cotton particles and the adhesive spirally sinks to the bottom of the bin wall of the cyclone drum, and the granular cotton particles and the adhesive are mixed again by the stirrer.

[0023] Further, the cotton laying and pre-pressing step is specifically: the granular cotton particles after being sized are thrown and scattered from the center to both sides by the material distributing machine, and the granular cotton particles after being sized are uniformly laid and stacked on the throwing and scattering roller in the settling forming chamber by the distributing machine, and then the granular cotton particles after being sized are sent into the hydraulic cold press for pre-pressing to form a fiber board blank.

[0024] Further, in the cotton laying and pre-pressing step, the pre-pressing pressure is 0.8-1.3MPa, and the pre-pressing time is 1-3min.

[0025] The beneficial effects of the present application are:

[0026] The present application provides a preparation method of a silicate fiber density board for indoor decoration, which recycles waste slag, reduces production cost to a certain extent, and is energy-saving and environment-friendly; the prepared fiber density board has excellent performance in terms of tensile strength, compressive strength, shear strength and shear modulus, improves the problems of low density and insufficient mechanical strength of the existing silicate fiber board, and improves the product quality and the qualification rate of the fiber density board. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a process flow diagram of the preparation method of the silicate fiber density board.

[0028] Figure 2 is a schematic diagram of the fiberizing step of the present application.

[0029] Figure 3 is a schematic diagram of the tearing and baling step of the present application.

[0030] Figure 4 is a schematic diagram of the unwinding, sizing and laying step of the present application.

[0031] Reference signs: 1 - baling machine; 2 - cyclone; 3 - slag remover; 4 - suction machine; 5 - rotating shaft sieve; 7 - tearing machine; 8 - cotton collecting drum; 9 - air conveying device; 10 - sizing device; 11 - cyclone mixing bin; 12 - material homogenizer; 13 - distributing machine; 14 - throwing roller; 15 - settling forming chamber. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings and a preferred embodiment.

[0033] The process flow chart of the preparation method of the silicate fiber density board is shown in Figure 1.

[0034] Example 1

[0035] Preparation of raw materials: the raw materials of 50 parts of silicate, 25 parts of dolomite, 12 parts of nickel slag and 13 parts of blast furnace slag were sent into the electric melting furnace for melting.

[0036] Fiberizing by centrifugation: the melt flowed out of the electric melting furnace fell onto the four-roller centrifuge, and was drawn into fibers under the action of the blowing centrifugal fan at a rotation speed higher than 4500 r / min, while the dustproof oil was uniformly sprayed on the surface of the fibers (see Figure 2).

[0037] Tearing and baling: the fibers were then collected into primary cotton felt by the cotton collecting drum 8, the primary cotton felt was conveyed by the belt to the tearing machine 7, the tearing machine 7 tore the primary cotton felt into cotton strips, the cotton strips were conveyed into the cyclone 2 by the suction conveying pipeline through the suction machine 4, continued to be granulated into granular cotton by the rotating shaft sieve 5, the granular cotton was conveyed to the baling machine 1 after slag removal by the slag remover 3, weighed according to the specification 1200*1200mm on the baling machine 1, and baled into blocks (see Figure 3).

[0038] Gluing: The baled granular cotton pile is vibrated and pressed to be scattered into granular cotton particles, which are then entrained by the air flow through the air supply device 9 into the cyclone mixing bin 11. At this time, the mist spraying glue application device 10 sprays the proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proof oil with a mass ratio of 70:10:1) through the air flow to make it uniformly adhere to the granular cotton particles. Subsequently, the mixture of granular cotton particles and adhesive spirals down to the bottom of the cyclone mixing bin 11, and the granular cotton particles and adhesive are mixed again by the stirrer. After mixing, the glued granular cotton particles are thrown from the center to both sides by the uniformizer 12, and then evenly laid on the throwing roller 14 in the settling forming chamber 15 by the distributor 13, and then sent to the cold press.

[0039] Cotton laying and pre-pressing: The glued granular cotton particles are sent to the hydraulic cold press for pre-pressing, with a pre-pressing pressure of 1.0 MPa and a pre-pressing time of 2.5 min, to form a fiber board blank (see FIG. 4).

[0040] Cutting and detection: The fiber board blank is cut.

[0041] Three-stage hot pressing: The cut fiber board blank is sent to a three-stage hot pressing forming equipment, with a three-stage hot pressing temperature and time of 260℃, 8 min; 225℃, 15 min; and 210℃, 15 min, respectively.

[0042] Cooling and packaging: The hot-pressed fiber density board is cooled by belt transportation and then stacked and packaged to produce a silicate fiber density board.

[0043] Example 2

[0044] Material preparation and melting: The raw materials of silicate 40 parts, dolomite 30 parts, nickel slag 15 parts, and blast furnace slag 15 parts are sent into an electric melting furnace for melting.

[0045] Centrifugal fiberization: The melt flowing out of the electric melting furnace falls onto a four-roller centrifuge, and is drawn into fibers under the action of a high-speed rotation of the four-roller centrifuge above 4500 r / min and a blowing air blower, while the dust-proof oil is uniformly sprayed on the surface of the fibers.

[0046] Cotton tearing and packaging: Subsequently, the fibers are collected into a primary cotton felt by the cotton collecting drum 8, the primary cotton felt is transported by a belt conveyor to the cotton tearing machine 7, the cotton tearing machine 7 tears the primary cotton felt into cotton strips, the cotton strips are transported into the cyclone drum 2 by the suction conveying pipeline of the cotton extractor 4, and then are granulated into granular cotton by the rotating shaft screen 5, and the granular cotton is transported to the packing machine 1 after being deslagged by the deslagger 3, weighed according to the specification of 1200*1200 mm, and baled into blocks.

[0047] Cotton solution and sizing: The baled granular cotton pile is vibrated and pressed to be scattered into granular cotton particles, which are then entrained by the air flow through the air flow device 9 into the cyclone mixing bin 11. At this time, the mist spraying sizing device 10 sprays the proportionally prepared adhesive (the mass ratio of phenolic resin, silane water-repellent agent and dust-proof oil is 70:10:1) through the air flow to make it uniformly adhere to the granular cotton particles. Subsequently, the mixture of granular cotton particles and adhesive spirals down to the bottom of the cyclone mixing bin 11, and the granular cotton particles and adhesive are mixed again by the stirrer. After mixing, the granular cotton particles after sizing are thrown and applied by the uniformizer 12 from the center to both sides, and then the granular cotton particles after sizing are uniformly laid on the throwing roller 14 in the settling forming chamber 15 by the distributor 13, and then sent into the cold press.

[0048] Laying cotton and pre-pressing: The granular cotton particles after sizing are sent into the hydraulic cold press for pre-pressing, the pre-pressing pressure is 1.0 MPa, and the pre-pressing time is 2.5 min, forming a fiber board blank.

[0049] Cutting detection: The fiber board blank is cut.

[0050] Three-stage hot pressing: Finally, the fiber board blank is sent into the three-stage hot pressing forming equipment, and the temperature and time of three-stage hot pressing are 240℃, 12 min; 215℃, 20 min; and 190℃, 20 min, respectively.

[0051] Cooling and packaging: The hot-pressed fiber density board is cooled by belt transportation and then stacked and packaged to produce a silicate fiber density board.

[0052] Example 3

[0053] Preparation and melting: The raw materials of 50 parts of silicate, 30 parts of dolomite, 10 parts of nickel slag and 10 parts of blast furnace slag are sent into the electric melting furnace for melting.

[0054] Centrifugal fiberization: The melt flowing out of the electric melting furnace falls onto the four-roller centrifuge, and is drawn into fibers under the action of the four-roller centrifuge at a speed higher than 4500 r / min and the blowing air blower, while the dust-proof oil is uniformly sprayed on the surface of the fibers.

[0055] Cotton tearing and packaging: Subsequently, the fibers are collected into primary cotton felt by the cotton collecting drum 8, the primary cotton felt is transported by the belt to the cotton tearing machine 7, the cotton tearing machine 7 tears the primary cotton felt into cotton strips, the cotton strips are transported into the cyclone 2 by the suction conveying pipeline through the cotton extractor 4, and then are granulated into granular cotton by the rotating shaft screen 5, and the granular cotton is transported to the packing machine 1 after deslagging by the deslagger 3, weighed according to the specification 1200*1200mm, and baled into blocks.

[0056] Gluing: The baled granular cotton pile is vibrated and pressed to be scattered into granular cotton particles, which are then entrained by the air flow through the air supply device 9 into the cyclone mixing bin 11. At this time, the mist spraying glue application device 10 sprays the proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proof oil with a mass ratio of 70:10:1) through the air flow to make it uniformly adhere to the granular cotton particles. Subsequently, the mixture of granular cotton particles and adhesive spirals down the inner wall of the cyclone mixing bin 11 to the bottom of the bin, and the granular cotton particles and adhesive are mixed again by the stirrer. After mixing, the glued granular cotton particles are thrown from the center to both sides by the uniformizer 12, and then evenly laid on the throwing roller 14 in the settling forming chamber 15 by the distributor 13, and then sent to the cold press.

[0057] Cotton laying and pre-pressing: The glued granular cotton particles are sent to the hydraulic cold press for pre-pressing, with a pre-pressing pressure of 1.0 MPa and a pre-pressing time of 2.5 min, to form a fiber board blank.

[0058] Cutting and detection: The fiber board blank is cut.

[0059] Three-stage hot pressing: Finally, the fiber board blank is sent to a three-stage hot pressing forming equipment, with a three-stage hot pressing temperature and time of 250℃, 10 min; 220℃, 17 min; and 200℃, 18 min, respectively.

[0060] Cooling and packaging: The hot-pressed fiber density board is cooled by belt transportation and then stacked and packaged to produce a silicate fiber density board.

[0061] Example 4

[0062] Material preparation and melting: The raw materials of silicate 45 parts, dolomite 25 parts, nickel slag 15 parts, and blast furnace slag 15 parts are sent into an electric melting furnace for melting.

[0063] Centrifugal fiberization: The melt flowing out of the electric melting furnace falls onto a four-roller centrifuge, which is stretched into fibers at a speed higher than 4500 r / min under the action of a blowing air blower, and the dust-proof oil is uniformly sprayed on the surface of the fibers.

[0064] Cotton tearing and packaging: Subsequently, the fibers are collected into a primary cotton felt by the cotton collecting drum 8, the primary cotton felt is transported by a belt conveyor to the cotton tearing machine 7, the cotton tearing machine 7 tears the primary cotton felt into cotton strips, the cotton strips are transported into the cyclone drum 2 by the suction conveying pipeline through the cotton extractor 4, and then granulated into granular cotton by the rotating shaft screen 5, and the granular cotton is transported to the packing machine 1 after being deslagged by the deslagger 3, weighed according to the specification of 1200*1200mm, and baled into blocks.

[0065] Gluing: The baled granular cotton pile is vibrated and pressed to be scattered into granular cotton particles, which are then entrained by the air flow through the air supply device 9 into the cyclone mixing bin 11. At this time, the mist spraying glue application device 10 sprays the proportionally prepared adhesive (phenolic resin, silane water-repellent agent, and dust-proof oil with a mass ratio of 70:10:1) through the air flow to make it uniformly adhere to the granular cotton particles. Subsequently, the mixture of granular cotton particles and adhesive spirals down the inner wall of the cyclone mixing bin 11 to the bottom of the bin, and the granular cotton particles and adhesive are mixed again by the stirrer. After mixing, the glued granular cotton particles are thrown from the center to both sides by the uniformizer 12, and then evenly laid on the throwing roller 14 in the settling forming chamber 15 by the distributor 13, and then sent to the cold press.

[0066] Cotton laying and pre-pressing: The glued granular cotton particles are sent to the hydraulic cold press for pre-pressing, with a pre-pressing pressure of 1.0 MPa and a pre-pressing time of 2.5 min, to form a fiber board blank.

[0067] Cutting and detection: The fiber board blank is cut.

[0068] Three-stage hot pressing: Finally, the fiber board blank is sent to a three-stage hot pressing forming equipment, with a three-stage hot pressing temperature and time of 250℃, 10 min; 220℃, 17 min; and 200℃, 18 min, respectively.

[0069] Cooling and packaging: The hot-pressed fiber density board is cooled by belt transportation and then stacked and packaged to produce a silicate fiber density board.

[0070] Example 5

[0071] Raw material preparation and melting: The raw materials of silicate 50 parts, dolomite 27 parts, nickel slag 13 parts, and blast furnace slag 10 parts are sent into an electric melting furnace for melting.

[0072] Centrifugal fiberization: The melt flowing out of the electric melting furnace falls onto a four-roller centrifuge, which is stretched into fibers at a speed higher than 4500 r / min under the action of a blowing air blower, and the dust-proof oil is uniformly sprayed on the surface of the fibers.

[0073] Cotton tearing and packaging: Subsequently, the fibers are collected into a primary cotton felt by the cotton collecting drum 8, the primary cotton felt is transported by a belt conveyor to the cotton tearing machine 7, the cotton tearing machine 7 tears the primary cotton felt into cotton strips, the cotton strips are transported into the cyclone drum 2 by the suction conveying pipeline through the cotton extractor 4, and then granulated into granular cotton by the rotating shaft screen 5, and the granular cotton is transported to the packing machine 1 after being deslagged by the deslagger 3, weighed according to the specification of 1200*1200mm, and baled into blocks.

[0074] The cotton is opened and sized: the baled granular cotton is vibrated and pressed to be scattered into granular cotton particles, which are then entrained by the airflow of the air conveying device 9 into the cyclone mixing bin 11, at this time the mist spraying sizing device 10 sprays the proportionally prepared adhesive (the mass ratio of phenolic resin, silane water-repellent agent and dust-proof oil is 70:10:1) through the airflow to make it uniformly adhere to the granular cotton particles. Subsequently, the mixture of the granular cotton particles and the adhesive spirally sinks to the bottom of the cyclone mixing bin 11, and the granular cotton particles and the adhesive are mixed again by the stirrer. The mixed material machine 12 throws the sized granular cotton particles from the center to both sides, and then the granular cotton particles are uniformly laid on the throwing roller 14 in the settling forming chamber 15 by the distributing machine 13, and then are sent into the cold press.

[0075] Laying and pre-pressing of cotton: the sized granular cotton particles are sent into the hydraulic cold press for pre-pressing, the pre-pressing pressure is 1.0 MPa, and the pre-pressing time is 2.5 min, to form a fiber board blank.

[0076] Cutting and detection: the fiber board blank is cut.

[0077] Three-stage hot pressing: finally, the fiber board blank is sent into the three-stage hot pressing forming equipment, the temperature and time of the three-stage hot pressing are 250℃, 10 min; 220℃, 17 min; and 200℃, 18 min, respectively.

[0078] Cooling and packaging: the hot-pressed fiber density board is cooled by belt transportation and then is stacked and packaged to form a silicate fiber density board.

[0079] The commercial ordinary board (model GY-180) is used in the comparative example 1.

[0080] The mechanical property tests of the silicate fiber density boards prepared in the examples 1-5 and the commercial board are carried out, and the results are shown in Table 1.

[0081] Table 1: Mechanical property test

[0082] According to Table 1, the silicate fiber density boards prepared in the examples 1-5 have better performances in the static bending strength, elastic modulus and internal bonding strength, the silicate fiber density board prepared by the method of the present application improves the density and mechanical strength of the existing silicate fiber board, and solves the problem of fireproofing and flame retardation of the existing indoor decorative density board.

[0083] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements are also within the protection scope of the present application.

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 centrifugal machine at high speed; Tearing and packing: the fibers are processed into primary cotton felt, and the primary cotton felt is torn into cotton strips, granulated, weighed and packed 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 claim 1, wherein the density board is prepared by mixing 100 parts by weight of the silicate fiber, 10 to 30 parts by weight of the binder, 0.1 to 1 part by weight of the surfactant, and 0.1 to 1 part by weight of the water, and then performing a wet pressing process. 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 as follows: 40-50 parts of silicate, 25-30 parts of dolomite, 10-15 parts of nickel-iron slag and 10-15 parts of blast furnace slag.

3. The method of manufacturing a silicate fibrous density board for interior decoration according to claim 1 or 2, characterized in that: 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. The 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 following steps: the main raw materials and mixtures are weighed before melting, and then forced mixing is performed; the mixed material is dried and dedusted, and then transported to the kiln head bin for temporary storage; when the next step is performed, the dried and dedusted mixed material is weighed and then put into a melting furnace for melting.

5. The method of manufacturing a silicate fibrous density board for interior decoration according to claim 4, characterized in that: The centrifugal fiberization step specifically comprises the following steps: the mixed melt flowing out of the melting furnace is guided to a centrifugal machine through a movable chute; the melt is spun at high speed by the centrifugal machine and 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 centrifugal machine is not less than 4000r / min.

6. The method of manufacturing a silicate fiber density board for interior decoration according to claim 5, characterized in that: The tearing and packing 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 packing machine.

7. The method of manufacturing a silicate fibrous 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 by the centrifugal machine 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, granulated by the rotating shaft sieve, deslagged by the slag remover, weighed by a weighing belt machine and then sent to the packing machine; then the granular cotton is packed to form block-shaped cotton piles.

8. The method of manufacturing a silicate fibrous density board for interior decoration according to claim 7, characterized in that: In the dissolving and sizing step, the block-shaped cotton piles after packing are re-dispersed into granular cotton particles by vibration and pressure, and then wrapped by airflow through an air conveying device into a cyclone mixing bin; the sizing device sprays the adhesive through the airflow 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. The method of manufacturing a silicate fibrous density board for interior decoration according to claim 8, characterized in that: The pre-pressing step is specifically: the even material machine throws and spreads the granular cotton particles after sizing from the center to both sides, the granular cotton particles after sizing are evenly laid on the throwing and spreading roller in the settling forming chamber through the distributing machine, and then are sent into the hydraulic cold press to pre-press, forming the fiber board blank.

10. The method of manufacturing a silicate fibrous density board for interior decoration according to claim 9, characterized in that: In the pre-pressing step, the pre-pressing pressure is 0.8-1.3 MPa, and the pre-pressing time is 1-3 min.

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