High-strength thermal insulation rock wool building board and preparation method thereof

Abstract

The invention discloses a high-strength heat preservation rock wool building board and a preparation method thereof, and relates to the technical field of building engineering, and the high-strength heat preservation rock wool building board comprises a rock wool board base body, flexible buffer strips, an alkali-resistant polypropylene grid film, a dry hanging piece, an annular buffer gasket and an inorganic heat insulation gasket. The full-length equal-interval flexible buffer strips which are synchronously paved with rock wool fibers and integrally pressed and formed are arranged in the rock wool board base body, the alkali-resisting polypropylene grid films are compounded on the front face and the back face of the base body, and the dry hanging pieces which can be mechanically locked and fixed with the grid films and are provided with adjusting structures are pre-embedded in the base body. Annular buffer gaskets are arranged at the embedded ends of the hanging pieces in a matched mode, inorganic heat insulation gaskets are arranged on the contact faces of the hanging pieces, the plates and the external keels, and the avoiding arrangement structure of the flexible buffer strips and the embedded point positions of the dry hanging hanging pieces is optimized. The technical problems that a traditional rock wool building board is insufficient in dry hanging anchoring force, interlayer stripping is prone to occurring, cracking and falling off are prone to occurring when the rock wool building board is stressed, the mounting and adjusting adaptability is poor, and cold and hot bridge loss is large can be solved.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a high-strength thermal insulation rock wool building board and its preparation method. Background Technology

[0002] High-strength thermal insulation rock wool building panels provide efficient thermal insulation for building envelopes, significantly reducing building heating and cooling energy consumption, achieving energy conservation and consumption reduction, stabilizing indoor temperature and humidity, constructing fire barriers, effectively blocking the spread of fire, improving building fire safety, and enhancing the envelope's resistance to impact, wind pressure, and deformation. They also have excellent sound insulation, noise reduction, moisture resistance, and corrosion resistance, extending the service life of building envelope systems and are suitable for various building insulation engineering applications.

[0003] Existing technologies for high-strength thermal insulation rock wool building panels and their preparation methods generally suffer from problems such as poor overall structural integrity, insufficient dry-hanging anchoring force, easy interlayer peeling, easy cracking and detachment under stress, poor adaptability for on-site installation and adjustment, and large thermal bridge losses at metal hanger connection points. The preparation process also suffers from defects such as low interfacial bonding strength between fibers and adhesives, high internal stress during curing, and insufficient dimensional stability and batch performance consistency. Furthermore, traditional rock wool board production is highly dependent on primary mineral resources, and the organic adhesives have poor high-temperature resistance and aging resistance, resulting in rapid degradation of thermal insulation performance over long-term use. These issues severely affect the safety, structural durability, and energy-saving insulation effect of rock wool building panels, and they also fail to meet the high-standard application requirements of prefabricated building exterior wall dry-hanging insulation systems. Therefore, this invention provides a high-strength thermal insulation rock wool building panel and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength thermal insulation rock wool building board and its preparation method. This invention integrates a rock wool board matrix, flexible buffer strips, alkali-resistant polypropylene mesh film, pre-embedded dry-hanging components, and matching buffer and heat insulation pads into a composite structure. It optimizes the rock wool fiber formula with multi-component industrial solid waste and the bio-based inorganic composite binder system. It also features a precise control process from raw material fiber formation to segmented temperature-pressing curing and molding, achieving a synergistic improvement in the board's thermal insulation, structural load-bearing capacity, deformation buffering, installation compatibility, and fire resistance and durability. This effectively solves many industry pain points of traditional rock wool boards and can fully meet the needs of building exterior wall energy-saving insulation and prefabricated dry-hanging installation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a high-strength thermal insulation rock wool building board, characterized in that it includes a rock wool board substrate, a flexible buffer strip, an alkali-resistant polypropylene mesh film, dry-hanging components, annular buffer pads, and inorganic thermal insulation pads. The rock wool board substrate is an energy-saving thermal insulation material for building exterior walls, with a dry density of 140 kg / m³. 3~160kg / m 3 It is made of rock wool fiber that has been cured and pressed into shape using a bio-based inorganic composite binder; Flexible buffer strips are arranged horizontally and at equal intervals along the entire length inside the rock wool board matrix. The center-to-center distance between adjacent flexible buffer strips is 180mm to 220mm, the width of a single flexible buffer strip is 8mm to 12mm, and the thickness of the flexible buffer strip is the same as the thickness of the rock wool board matrix. The flexible buffer strip and the rock wool fiber of the rock wool board matrix are laid together and pressed into a single piece. The rock wool board substrate has a layer of alkali-resistant polypropylene mesh film on both the front and back sides, and the thickness of the alkali-resistant polypropylene mesh film is 0.15mm to 0.25mm. Four sets of dry-hanging brackets are pre-embedded inside the rock wool board substrate. The four sets of dry-hanging brackets are arranged in a rectangle of 380mm~420mm×380mm~420mm. The dry-hanging brackets are L-shaped structures. The long side of the bracket is inserted into the rock wool board substrate and penetrates the alkali-resistant polypropylene mesh film on one side of the installation surface. The root of the pre-embedded end is mechanically locked to the alkali-resistant polypropylene mesh film on the same side through a flange structure. The pre-embedded depth of the dry-hanging bracket is 1 / 3 to 1 / 2 of the thickness of the rock wool board substrate. The end of the pre-embedded end is provided with a barbed anchoring structure to form a reinforced anchor with the internal fibers of the rock wool board substrate. The short side is the exposed installation end, which is provided with an elongated hole adjustment structure. The elongated hole is opened in the horizontal direction and the adjustment stroke is 12mm~18mm. An annular buffer pad is fitted at the root of the pre-embedded end of the dry-hanging component. The material of the annular buffer pad is the same as that of the flexible buffer strip. The thickness of the annular buffer pad is 4mm to 6mm and the diameter of the annular buffer pad is 25mm to 35mm. Inorganic heat insulation pads are provided on the contact surfaces between the dry-hanging components and the rock wool board substrate, and inorganic heat insulation pads of the same specifications are provided on the connection surfaces between the dry-hanging components and the external installation keel. The thickness of the inorganic heat insulation pads is 3mm. The flexible buffer strip is arranged in a way that avoids the pre-embedded position of the dry-hanging component, and the distance between the pre-embedded point of the dry-hanging component and the edge of the flexible buffer strip is 50mm to 100mm.

[0006] Preferably, the flexible buffer strip is made of basalt fiber needle-punched felt.

[0007] Preferably, the material of the dry-hanging bracket is 316 stainless steel.

[0008] Preferably, the rock wool fiber is prepared from the following raw materials in parts by weight, with the total of all components being 100 parts: 50 to 58 parts basalt, 15 to 22 parts blast furnace slag, 8 to 12 parts stainless steel tailings, 2 to 4 parts red mud, 1 to 3 parts borax, and the remainder being fluxing auxiliary materials.

[0009] Preferably, a method for preparing a high-strength thermal insulation rock wool building board includes the following steps: S1. Raw material pretreatment and melt fiber formation: Weigh the rock wool fiber raw materials according to the formula, grind them to ≤5% residue on a 200-mesh sieve, mix and homogenize them, pre-sinter at 800℃~900℃ for 15min~25min, then melt at 1440℃~1460℃ for 30min~40min, control the melt exit temperature at 1420℃~1440℃, and prepare rock wool fibers through a four-stage centrifugal fiber forming machine; S2. Flexible buffer strip pretreatment and felt laying composite: The flexible buffer strip is roughened by atmospheric pressure jet plasma equipment, and the surface roughness Ra of the flexible buffer strip after treatment is 2.0μm~3.0μm; During the process of laying rock wool fiber felt, a continuous flexible buffer strip is laid every 180mm to 220mm along the horizontal direction, and the rock wool fiber and the flexible buffer strip are laid simultaneously to form the rock wool felt matrix. S3. Pre-laying of mesh film: A layer of alkali-resistant polypropylene mesh film is pre-laid on the upper and lower surfaces of the rock wool felt substrate; S4. Adhesive impregnation and vacuum degumming: The rock wool felt matrix after pre-laying the mesh film is impregnated in a bio-based inorganic composite adhesive, and then subjected to double roller impregnation treatment. After impregnation, it is subjected to vacuum degumming treatment. The bio-based inorganic composite adhesive is prepared from enzymatically hydrolyzed lignin-based bio-resin, potassium silicate solution with a modulus of 3.8 to 4.2, nano-silica sol, curing accelerator, and deionized water. The adhesive has a solid content of 40% to 50% and a viscosity of 150 mPa·s to 200 mPa·s at 25°C. S5. Pre-installed component positioning and installation: On the impregnated rock wool felt substrate, dry-hanging components are positioned in a rectangular distribution of 380mm~420mm×380mm~420mm. The distance between the pre-embedded points of the dry-hanging components and the edge of the flexible buffer strip is 50mm~100mm. The dry-hanging bracket vertically penetrates the alkali-resistant polypropylene mesh film on one side of the rock wool felt substrate installation surface. A ring-shaped buffer pad is fitted at the root of the pre-embedded end so that the pad fits between the mesh film and the short side of the bracket. It is inserted to the preset pre-embedded depth and mechanically locked and fixed with the alkali-resistant polypropylene mesh film on that side through the root flange structure. Inorganic heat insulation pads are placed on the contact surface between the dry-hanging components and the rock wool felt substrate; S6. Segmented temperature and pressure co-curing molding: The positioned rock wool felt matrix is ​​sent into a pressure curing oven and cured in four stages: pre-curing stage temperature 105℃~115℃, pressure 0.12MPa~0.18MPa, constant temperature and pressure 12min~18min; The main curing section temperature is 175℃~185℃, the pressure is 0.22MPa~0.28MPa, and the constant temperature and pressure is maintained for 25min~35min; The post-curing section temperature is 145℃~155℃, the pressure is 0.18MPa~0.22MPa, and the constant temperature and pressure is maintained for 15min~25min; The cooling section is cooled from 145℃ to 155℃ to 55℃ to 65℃ at a linear cooling rate of 1.5℃ / min to 2.5℃ / min, while the pressure is simultaneously and linearly reduced to atmospheric pressure. Then it is naturally cooled to room temperature to obtain a rock wool slab blank. S7. Thickness-fixed cutting and finished product inspection: The rock wool board blank is rolled and polished with a thickness-fixed roller, and then cut to the target specifications to obtain the finished high-strength thermal insulation rock wool building board.

[0010] Preferably, the rotational speeds of the four rollers in the centrifugal fiber forming machine are 2800 r / min to 3200 r / min, 4300 r / min to 4700 r / min, 5800 r / min to 6200 r / min, and 7000 r / min to 7400 r / min, respectively; the melt flow rate is controlled at 1.5 t / h to 2.0 t / h; the fiber forming air temperature is 350℃ to 380℃; and the air pressure is 6 kPa to 8 kPa. Preferably, the processing parameters for the roughening treatment of the plasma equipment are: power 180W~220W, argon flow rate 4L / min~6L / min, distance between nozzle and buffer bar surface 8mm~12mm, and processing time 25s~35s.

[0011] Preferably, the double-roller impregnation pressure is 0.1MPa~0.2MPa and 0.25MPa~0.35MPa respectively, the vacuum degree of the core layer after vacuum degumming is -0.10MPa~-0.08MPa, and the vacuum degree of the surface layer is -0.07MPa~-0.05MPa.

[0012] Preferably, the curing accelerator of the bio-based inorganic composite adhesive is 2-ethyl-4-methylimidazole.

[0013] Preferably, the roller pressure of the thickness roll forming is 0.3MPa~0.5MPa, the linear speed is 8m / min~10m / min, and the thickness tolerance is controlled within ±0.5mm.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves an integrated and coordinated design of thermal insulation, structural load-bearing capacity, deformation buffering, and installation adaptability of the insulation board by setting a continuous, equally spaced flexible buffer strip inside the rock wool board matrix, laying and pressing it in one piece with the rock wool fiber synchronously, composite alkali-resistant polypropylene mesh film on both sides of the matrix, pre-embedding dry-hanging brackets with mechanical locking and adjustable structure inside the matrix, setting annular buffer pads at the pre-embedded ends of the brackets, and setting inorganic heat insulation pads at the contact surfaces of the brackets with the board and the external keel. It also optimizes the avoidance arrangement structure of the flexible buffer strips and the pre-embedded points of the dry-hanging brackets. Compared with existing technologies, this invention can significantly improve the anchoring stability of the dry-hanging brackets, the interlayer bonding strength of the board, the crack resistance and impact resistance, and the on-site installation adjustment and adaptability. It also effectively eliminates the thermal bridge effect at the bracket connection points. Therefore, it can solve the technical problems of insufficient anchoring force, easy interlayer peeling, easy cracking and falling off under stress, poor installation adjustment and adaptability, and large thermal bridge losses in traditional rock wool building boards.

[0015] 2. This invention achieves precise control over the structure and performance of the board from raw material fiber formation to curing by employing a pretreatment and graded melting centrifugal fiber-forming process for rock wool fiber raw materials, a surface modification pretreatment and synchronous felting composite process for flexible buffer strips, a double-roller gradient impregnation and graded vacuum degumming adhesive uniform penetration process, a precise positioning and mechanical locking process for pre-insertion, and a segmented temperature and pressure synergistic curing and temperature and pressure controlled cooling molding process. Compared with existing technologies, this invention can significantly improve the integrity of the board's internal structure, the uniformity of the interface bonding between fibers and adhesives, and the dimensional stability and batch performance consistency of the cured board. Therefore, it can solve the technical problems of low interface bonding strength, insufficient structural uniformity, high curing internal stress, poor dimensional stability, and large batch performance fluctuations in traditional rock wool board preparation processes.

[0016] 3. This invention achieves high-value utilization of industrial solid waste and synergistic improvement of the environmental protection, fire resistance, durability, and thermal insulation performance of the board by designing a rock wool fiber raw material formula with multi-component industrial solid waste synergistic compatibility and constructing a bio-based inorganic composite binder system by compounding enzymatically hydrolyzed lignin-based bio-resin with an inorganic silicon-based system. Compared with the prior art, it can significantly reduce the dependence of rock wool production on primary basalt mineral resources, improve the high-temperature fire resistance, weather resistance, aging resistance, and environmental safety of the board, and ensure the stability of the thermal insulation performance of the board during long-term use. Therefore, it can solve the technical problems of traditional rock wool boards, such as high raw material resource consumption, poor high-temperature resistance and easy aging of organic binders, insufficient environmental safety, and rapid decay of thermal insulation performance over long-term use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the high-strength thermal insulation rock wool building board structure of the present invention; Figure 2This is a schematic diagram of the preparation method of the high-strength thermal insulation rock wool building board of the present invention.

[0018] In the diagram: 1. Rock wool board substrate; 2. Alkali-resistant polypropylene mesh film. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The raw materials used in this invention have uniform specifications (they can be directly purchased from the market; there are no self-made or undisclosed raw materials). Basalt: Industrial grade, SiO2 content ≥48%, particle size 200 mesh; Blast furnace slag: Industrial grade, water-quenched blast furnace slag, CaO content ≥38%, particle size 200 mesh; Stainless steelmaking tailings: industrial grade, Fe2O3 content ≥22%, particle size 200 mesh; Red mud: Bayer process red mud, Al2O3 content ≥20%, particle size 200 mesh; Borax: Industrial grade, purity ≥95%; Basalt fiber needle-punched felt: Temperature resistance ≥1100℃, surface density 200g / m³ 2 Elongation at break ≥13%, thickness consistent with rock wool board matrix thickness; Alkali-resistant polypropylene mesh film: thickness 0.15mm~0.25mm, alkali retention rate ≥90%, warp and weft tensile breaking strength ≥1200N / 50mm, mesh size 5mm×5mm; 316 stainless steel dry-hanging fitting: 2mm thick, L-shaped structure, with an oblong hole adjustment structure on the short side, the oblong hole size is 30mm×10mm, opened in the horizontal direction, with an adjustment stroke of 12mm~18mm, the long side is a pre-embedded end, with a flange locking structure, and salt spray resistance ≥1000h; Inorganic thermal insulation pad: made of nano-microporous calcium silicate material, density 200kg / m³, compressive strength ≥0.4MPa, thermal conductivity ≤0.020W / (m・K), thickness 3mm, with a φ10mm mounting hole in the center; Enzymatic hydrolysis of lignin-based bioresin: Industrial grade, weight average molecular weight 5000-8000, lignin content ≥90%, hydroxyl value 280-320mgKOH / g, softening point 110-120℃; Potassium silicate solution: Modulus 3.8–4.2, solid content ≥40%, industrial grade; Nano silica sol: particle size 10-20nm, solid content 30%, industrial grade; Curing accelerator: 2-ethyl-4-methylimidazolium, industrial grade, purity ≥99%, with good curing compatibility with potassium silicate-lignin resin system; The standard specifications of the rock wool building panels prepared in all embodiments of the present invention are: length 1200mm, width 600mm, thickness 80mm, and dry density 150kg / m³. 3 .

[0021] A high-strength thermal insulation rock wool building board includes a rock wool board substrate, a flexible buffer strip, an alkali-resistant polypropylene mesh film, dry-hanging components, an annular buffer pad, and an inorganic thermal insulation pad. The rock wool board substrate is an energy-saving thermal insulation material for building exterior walls, with a dry density of 140 kg / m³. 3 ~160kg / m 3 It is made of rock wool fiber that has been cured and pressed into shape using a bio-based inorganic composite binder; Flexible buffer strips are arranged horizontally and at equal intervals along the entire length inside the rock wool board matrix. The center-to-center distance between adjacent flexible buffer strips is 180mm to 220mm, the width of a single flexible buffer strip is 8mm to 12mm, and the thickness of the flexible buffer strip is the same as the thickness of the rock wool board matrix. The flexible buffer strip and the rock wool fiber of the rock wool board matrix are laid together and pressed into a single piece. The rock wool board substrate has a layer of alkali-resistant polypropylene mesh film on both the front and back sides, and the thickness of the alkali-resistant polypropylene mesh film is 0.15mm to 0.25mm. Four sets of dry-hanging brackets are pre-embedded inside the rock wool board substrate. The four sets of dry-hanging brackets are arranged in a rectangle of 380mm~420mm×380mm~420mm. The dry-hanging brackets are L-shaped structures. The long side of the bracket is inserted into the rock wool board substrate and penetrates the alkali-resistant polypropylene mesh film on one side of the installation surface. The root of the pre-embedded end is mechanically locked to the alkali-resistant polypropylene mesh film on the same side through a flange structure. The pre-embedded depth of the dry-hanging bracket is 1 / 3 to 1 / 2 of the thickness of the rock wool board substrate. The end of the pre-embedded end is provided with a barbed anchoring structure to form a reinforced anchor with the internal fibers of the rock wool board substrate. The short side is the exposed installation end, which is provided with an elongated hole adjustment structure. The elongated hole is opened in the horizontal direction and the adjustment stroke is 12mm~18mm. An annular buffer pad is fitted at the root of the pre-embedded end of the dry-hanging component. The material of the annular buffer pad is the same as that of the flexible buffer strip. The thickness of the annular buffer pad is 4mm to 6mm and the diameter of the annular buffer pad is 25mm to 35mm. Inorganic heat insulation pads are provided on the contact surfaces between the dry-hanging components and the rock wool board substrate, and inorganic heat insulation pads of the same specifications are provided on the connection surfaces between the dry-hanging components and the external installation keel. The thickness of the inorganic heat insulation pads is 3mm. The flexible buffer strip is arranged in a way that avoids the pre-embedded position of the dry-hanging component, and the distance between the pre-embedded point of the dry-hanging component and the edge of the flexible buffer strip is 50mm to 100mm.

[0022] The flexible buffer strip is made of basalt fiber needle-punched felt.

[0023] The material of the dry-hanging component is 316 stainless steel.

[0024] The rock wool fiber is prepared from the following raw materials in parts by weight, with a total of 100 parts: 50-58 parts basalt, 15-22 parts blast furnace slag, 8-12 parts stainless steel tailings, 2-4 parts red mud, 1-3 parts borax, and the remainder being fluxing agents.

[0025] A method for preparing a high-strength thermal insulation rock wool building board, the method comprising the following steps: S1. Raw material pretreatment and melt fiber formation: Weigh the rock wool fiber raw materials according to the formula, grind them to ≤5% residue on a 200-mesh sieve, mix and homogenize them, pre-sinter at 800℃~900℃ for 15min~25min, then melt at 1440℃~1460℃ for 30min~40min, control the melt exit temperature at 1420℃~1440℃, and prepare rock wool fibers through a four-stage centrifugal fiber forming machine; S2. Flexible buffer strip pretreatment and felt laying composite: The flexible buffer strip is roughened by atmospheric pressure jet plasma equipment, and the surface roughness Ra of the flexible buffer strip after treatment is 2.0μm~3.0μm; During the process of laying rock wool fiber felt, a continuous flexible buffer strip is laid every 180mm to 220mm along the horizontal direction, and the rock wool fiber and the flexible buffer strip are laid simultaneously to form the rock wool felt matrix. S3. Pre-laying of mesh film: A layer of alkali-resistant polypropylene mesh film is pre-laid on the upper and lower surfaces of the rock wool felt substrate; S4. Adhesive impregnation and vacuum degumming: The rock wool felt matrix after pre-laying the mesh film is impregnated in a bio-based inorganic composite adhesive, and then subjected to double roller impregnation treatment. After impregnation, it is subjected to vacuum degumming treatment. The bio-based inorganic composite adhesive is prepared from enzymatically hydrolyzed lignin-based bio-resin, potassium silicate solution with a modulus of 3.8 to 4.2, nano-silica sol, curing accelerator, and deionized water. The adhesive has a solid content of 40% to 50% and a viscosity of 150 mPa·s to 200 mPa·s at 25°C. S5. Pre-installed component positioning and installation: On the impregnated rock wool felt substrate, dry-hanging components are positioned in a rectangular distribution of 380mm~420mm×380mm~420mm. The distance between the pre-embedded points of the dry-hanging components and the edge of the flexible buffer strip is 50mm~100mm. The dry-hanging bracket vertically penetrates the alkali-resistant polypropylene mesh film on one side of the rock wool felt substrate installation surface. A ring-shaped buffer pad is fitted at the root of the pre-embedded end so that the pad fits between the mesh film and the short side of the bracket. It is inserted to the preset pre-embedded depth and mechanically locked and fixed with the alkali-resistant polypropylene mesh film on that side through the root flange structure. Inorganic heat insulation pads are placed on the contact surface between the dry-hanging components and the rock wool felt substrate; S6. Segmented temperature and pressure co-curing molding: The positioned rock wool felt matrix is ​​sent into a pressure curing oven and cured in four stages: pre-curing stage temperature 105℃~115℃, pressure 0.12MPa~0.18MPa, constant temperature and pressure 12min~18min; The main curing section temperature is 175℃~185℃, the pressure is 0.22MPa~0.28MPa, and the constant temperature and pressure is maintained for 25min~35min; The post-curing section temperature is 145℃~155℃, the pressure is 0.18MPa~0.22MPa, and the constant temperature and pressure is maintained for 15min~25min; The cooling section is cooled from 145℃ to 155℃ to 55℃ to 65℃ at a linear cooling rate of 1.5℃ / min to 2.5℃ / min, while the pressure is simultaneously and linearly reduced to atmospheric pressure. Then it is naturally cooled to room temperature to obtain a rock wool slab blank. S7. Thickness-fixed cutting and finished product inspection: The rock wool board blank is rolled and polished with a thickness-fixed roller, and then cut to the target specifications to obtain the finished high-strength thermal insulation rock wool building board.

[0026] The speeds of the four rollers in the centrifugal fiber forming machine are 2800 r / min to 3200 r / min, 4300 r / min to 4700 r / min, 5800 r / min to 6200 r / min, and 7000 r / min to 7400 r / min, respectively. The melt flow rate is controlled at 1.5 t / h to 2.0 t / h, the fiber forming air temperature is 350℃ to 380℃, and the air pressure is 6 kPa to 8 kPa. The processing parameters for the roughening treatment of the plasma equipment are: power 180W~220W, argon flow rate 4L / min~6L / min, distance between nozzle and buffer bar surface 8mm~12mm, and processing time 25s~35s.

[0027] The dual-roller impregnation pressures are 0.1MPa~0.2MPa and 0.25MPa~0.35MPa respectively. The vacuum degree of the core layer after vacuum degumming is -0.10MPa~-0.08MPa, and the vacuum degree of the surface layer is -0.07MPa~-0.05MPa.

[0028] The curing accelerator of the bio-based inorganic composite adhesive is 2-ethyl-4-methylimidazole.

[0029] The roller pressure for thickness rolling is 0.3MPa~0.5MPa, the linear speed is 8m / min~10m / min, and the thickness tolerance is controlled within ±0.5mm.

[0030] Example 1: The high-strength thermal insulation rock wool building board in this example has dimensions of 1200mm×600mm×80mm and a dry density of 150kg / m³. 3 It includes rock wool board substrate, flexible buffer strip, alkali-resistant polypropylene mesh film, dry hanging components, ring buffer pads, and inorganic heat insulation pads; The rock wool fiber raw materials of the rock wool board matrix are as follows by weight: 55 parts basalt, 20 parts blast furnace slag, 10 parts stainless steel tailings, 3 parts red mud, and 2 parts borax. The flexible cushioning strip is made of basalt fiber needle-punched felt, arranged horizontally every 200mm, with a single strip width of 10mm and a thickness of 80mm, and is integrally pressed and formed with rock wool fiber; Alkali-resistant polypropylene mesh film, 0.2 mm thick, is laminated onto both sides of the rock wool board substrate; The dry-hanging brackets are made of 316 stainless steel, with a total of 4 sets, arranged in a 400mm×400mm rectangle. The distance between the pre-embedded points and the edge of the flexible buffer strip is 75mm. They are mechanically locked and fixed to the mesh membrane through the flange structure. The pre-embedded depth is 40mm. The short side is equipped with an oblong hole adjustment structure with an adjustment stroke of 15mm. The annular buffer pad is made of the same material as the flexible buffer strip, with a thickness of 5mm and a diameter of 30mm, and is fitted onto the root of the pre-embedded end of the dry-hanging component. Inorganic heat insulation pads with a thickness of 3mm are respectively placed on the contact surfaces between the dry-hanging components and the rock wool board substrate and the external keel.

[0031] The preparation method of this embodiment includes the following steps: Weigh out 55 parts basalt, 20 parts blast furnace slag, 10 parts stainless steel tailings, 3 parts red mud, and 2 parts borax by weight. Grind them until the residue on a 200-mesh sieve does not exceed 5%. After dry homogenization in a twin-shaft mixer at 60 r / min for 15 min, send them to a rotary kiln for pre-sintering at 850℃ for 20 min, and then send them to a cupola furnace for melting at 1450℃ for 35 min. The melt exit temperature is 1430℃. The melt is then processed into rock wool fibers by a four-stage centrifugal fiber forming machine. The speeds of the four rollers are 3000 r / min, 4500 r / min, 6000 r / min, and 7200 r / min, respectively. The melt flow rate is 1.8 t / h, the fiber forming air temperature is 360℃, and the air pressure is 7 kPa. The flexible buffer strips are roughened by atmospheric pressure jet plasma with a power of 200W, an argon flow rate of 5L / min, a nozzle distance of 10mm from the surface of the buffer strip, and a treatment time of 30s. The surface roughness Ra after treatment is 2.5μm. During the rock wool fiber felting process, a pre-treated flexible buffer strip is laid every 200mm along the horizontal direction. The felting machine runs at a speed of 11m / min, and the surface density of the rock wool felt is 11.5kg / ㎡. The felting is carried out simultaneously to form the rock wool felt matrix. A 0.2mm thick alkali-resistant polypropylene mesh film is pre-laid on both sides of the rock wool felt substrate; The rock wool felt matrix after pre-laying the mesh film is fed into a two-roller impregnation machine. The binder is prepared by 30 parts of enzymatically hydrolyzed lignin-based bio-resin, 45 parts of potassium silicate solution with a modulus of 3.8-4.2, 8 parts of nano-silica sol, 2 parts of 2-ethyl-4-methylimidazolium, and 15 parts of deionized water. The solid content is 45%, the viscosity at 25℃ is 180 mPa·s, the impregnation liquid temperature is 25℃, and the two-roller impregnation pressure is 0.15 MPa and 0.3 MPa respectively. After impregnation, vacuum debinding is performed, with a core layer vacuum degree of -0.09 MPa and a surface layer vacuum degree of -0.06 MPa. On the impregnated rock wool felt substrate, four sets of dry-hanging components are positioned in a 400mm×400mm rectangular pattern, and annular buffer pads are fitted. The dry-hanging components penetrate the rock wool felt substrate and the mesh film, and the edges are turned up to form a locking and fixing. Inorganic heat insulation pads are placed, and the positions are fixed by positioning fixtures. The positioned rock wool felt matrix is ​​sent into a pressure curing furnace for segmented curing treatment: pre-curing section 110℃, 0.15MPa, constant temperature and pressure for 15min; main curing section 180℃, 0.25MPa, constant temperature and pressure for 30min; post-curing section 150℃, 0.2MPa, constant temperature and pressure for 20min; cooling section reduces the temperature from 150℃ to 60℃ at a rate of 2℃ / min, and the pressure is simultaneously and linearly reduced to atmospheric pressure, and then naturally cooled to room temperature to obtain the rock wool board blank; The rock wool board blank is calendered to a fixed thickness, with a roller pressure of 0.4MPa and a linear speed of 9m / min. It is then cut to 1200mm×600mm×80mm and the finished product is obtained after passing inspection.

[0032] Example 2 differs from Example 1 in that the flexible buffer strip is made of high-silica fiber needle-punched felt, while all other parameters of the product structure and preparation method are completely consistent with Example 1.

[0033] Example 3 differs from Example 1 in that the material of the dry-hanging component is 304 stainless steel, while all other parameters of the product structure and preparation method are completely consistent with those of Example 1, and all values ​​are within the range defined above.

[0034] Example 4 differs from Example 1 in that the rock wool fiber raw materials are: 50 parts by weight of basalt, 22 parts of blast furnace slag, 12 parts of stainless steel tailings, 4 parts of red mud, 3 parts of borax, and 9 parts of fluxing agent. All parameters of the remaining product structure and preparation method are completely consistent with those of Example 1, and all values ​​are within the range defined above.

[0035] Example 5 differs from Example 1 in that: in step S1, the raw materials are directly melted after mixing and homogenization without pre-sintering; all parameters of the remaining product structure and preparation method are completely consistent with those of Example 1, and all values ​​are within the range defined above.

[0036] Example 6 differs from Example 1 in that the flexible buffer strip is not subjected to plasma roughening treatment and is directly laminated with felt. All other parameters of the product structure and preparation method are completely consistent with those of Example 1.

[0037] Example 7 differs from Example 1 in that: in step S6, after the post-curing stage is completed, the product is directly cooled naturally from 150°C to room temperature without linear temperature and pressure control cooling. All parameters of the remaining product structure and preparation method are completely consistent with those of Example 1, and all values ​​are within the range defined above.

[0038] Example 8 differs from Example 1 in that the curing accelerator of the bio-based inorganic composite adhesive is N,N-dimethylbenzylamine, while all other product structures and preparation method parameters are completely consistent with Example 1.

[0039] Example 9 differs from Example 1 in that the roller pressure of the thickness roll pressing is 0.3 MPa and the linear speed is 8 m / min. All other parameters of the product structure and preparation method are completely consistent with those of Example 1, and all values ​​are within the range defined above.

[0040] Comparative Example 1 differs from Example 1 in that the rock wool board substrate does not have a flexible buffer strip inside, while all other parameters of the product structure and preparation method are completely consistent with Example 1.

[0041] Comparative Example 2 differs from Example 1 in that the rock wool board substrate is not laminated with alkali-resistant polypropylene mesh film on either side, while all other product structures and preparation method parameters are completely consistent with Example 1.

[0042] Comparative Example 3 differs from Example 1 in that: no dry-hanging components are pre-embedded inside the rock wool board substrate, while all other parameters of the product structure and preparation method are completely consistent with Example 1.

[0043] Comparative Example 4: This comparative example uses commercially available conventional rock wool board for exterior wall insulation, manufactured by Shandong Luyang Energy-Saving Materials Co., Ltd., product model LY-150, conforming to standard GB / T25975-2018, with dimensions of 1200mm×600mm×80mm and a dry density of 150kg / m³. 3 The test was conducted using a dry-hanging method with expansion bolts installed on-site. There were no flexible buffer strips, no prefabricated locking dry-hanging components, no annular buffer pads, and no inorganic heat insulation pads. All other test conditions were completely consistent with those in Example 1.

[0044] The unified standards and methods for performance testing of this invention are as follows: The uniform environment for all performance tests is: ambient temperature 23℃±2℃, relative humidity 50%±5%; the standards, equipment, and judgment rules for the test items are as follows: Hanger anchor pull-out force: Test standard JGJ144-2019 "Technical Standard for External Wall Insulation Engineering" Appendix C Anchor Bolt Tensile Bearing Capacity Test Method, WDW-100 microcomputer-controlled electronic universal testing machine, test rate 5mm / min, sample thickness 80mm, record the maximum pull-out force value when the hanger separates from the board; Interlayer peel strength: Test standard GB / T30804-2014 "Test Method for Performance of Thermal Insulation Boards for Buildings", sample size 300mm×50mm×80mm, peel rate 50mm / min, record average peel force; Critical deformation rate for cracking of sheet metal: The MTS electro-hydraulic servo interlaminar deformation simulation test bench was used. The sample span was 1200 mm, with both ends fixed and a transverse displacement applied in the middle at a rate of 0.5 mm / s. The ratio of the transverse displacement to the span when the first visible crack appeared on the sheet metal surface was taken as the critical deformation rate for cracking. Thermal conductivity: Test standard GB / T10294-2008 "Determination of steady-state thermal resistance and related properties of thermal insulation materials - protective hot plate method", test temperature 25℃, sample size 300mm×300mm×80mm, using DRPL-Ⅲ thermal conductivity tester. Dimensional stability: Test standard GB / T8811-2008 "Test method for dimensional stability of rigid foamed plastics", test conditions 70℃, 48h, sample size 100mm×100mm×80mm, record the maximum rate of change of length, width and thickness; Impact resistance: Test standard GB / T25975-2018 "Rock wool products for external thermal insulation of building exterior walls", 1kg steel ball is dropped freely from a height of 1m, and the maximum number of impacts without penetrating damage to the board or detachment of hanging parts is recorded; High temperature resistance: Test standard GB / T5464-2010 "Test method for non-combustibility of building materials", the sample is burned at 750℃±5℃ for 30min; Supplementary 1000℃ high temperature linear shrinkage test: the sample is burned in a muffle furnace at 1000℃ for 30min, and the linear shrinkage rate and pulverization are recorded.

[0045] The high-strength thermal insulation rock wool building boards prepared in Examples 1 to 9 and Comparative Examples 1 to 4 were subjected to the above-mentioned performance tests according to the unified standard. The test data obtained are recorded in Table 1 below: In the performance test, Example 1 adopted the complete core technical solution of the present invention, specifically: a rock wool board matrix formed by curing rock wool fibers with a bio-based inorganic composite adhesive as the main body, flexible buffer strips integrally pressed with rock wool fibers and arranged at equal intervals along the horizontal direction inside the matrix, alkali-resistant polypropylene mesh film composite on both sides of the matrix, four sets of dry-hanging brackets pre-embedded inside the matrix to form mechanical locking with the mesh film, ring buffer pads matching the pre-embedded ends of the brackets, and inorganic heat insulation pads set on the contact surfaces of the brackets with the matrix and the external keel. Combined with a complete process of raw material pre-sintering, buffer strip surface roughening, double-roller impregnation vacuum degumming, and segmented temperature and pressure synergistic curing, the product obtained is a high-strength thermal insulation rock wool building board. Its core performance, including bracket anchoring performance, interlayer bonding performance, crack resistance, thermal insulation performance, dimensional stability, impact resistance, and high temperature resistance, all reached the optimal level in this test. The overall performance fully meets the high standard requirements for use of prefabricated building exterior wall dry-hanging insulation system.

[0046] Example 2 only adjusted the material of the flexible buffer strip, using high-silica fiber needle-punched felt. The core performance of the product was consistent with the optimal solution, and the high-temperature resistance was even better, verifying the adaptability and application advantages of this material solution.

[0047] Example 3 only adjusted the material of the dry-hanging components, using 316 stainless steel. The core performance of the resulting product did not fluctuate significantly, and its weather resistance and corrosion resistance were further improved. It can be adapted to harsh operating environments such as high humidity and high salt spray, thus improving the material selection scheme for different scenarios.

[0048] Example 4 only adjusted the raw material ratio of rock wool fiber, and the core performance of the product remained stable, fully meeting the conventional requirements for building exterior wall insulation, thus verifying the rationality and wide applicability of the raw material ratio range used in this invention.

[0049] Example 5 only adjusted the preparation process, omitting the raw material pre-sintering process. The core performance of the product still met the standards stably, with only some performance characteristics fluctuating slightly compared to the optimal solution. This verifies that the process of the present invention can be flexibly adjusted according to the production equipment conditions and has strong adaptability for industrial application.

[0050] Example 6 only adjusted the preparation process, omitting the plasma roughening treatment step of the flexible buffer strip. The core performance of the product still meets the usage requirements, verifying that the plasma roughening step is the preferred and optimized solution of the present invention, and the basic process solution also has complete practicality.

[0051] Example 7 only adjusted the preparation process, omitting the linear temperature and pressure control cooling process after curing. Except for slight fluctuations in dimensional stability, the core properties of the product remained stable, verifying that the linear cooling process is the internal stress optimization scheme of the present invention. The process has strong fault tolerance and can be adapted to the production needs of different curing equipment.

[0052] Example 8 only adjusted the curing accelerator of the adhesive, using N,N-dimethylbenzylamine. The resulting product had excellent curing effect, and all core properties reached the optimal level, verifying the high compatibility between the curing accelerator and the adhesive system of the present invention.

[0053] Example 9 only adjusted the rolling parameters of the thickness cutting process, and the resulting product had the required dimensional accuracy. The core performance was consistent with the optimal solution, which verified the rationality of the rolling parameter range used in this invention and that it can be adapted to the processing speed requirements of different production lines.

[0054] The test results of each comparative example show that, in Comparative Example 1, the core structure of the present invention, the flexible buffer strip, was removed, resulting in a significant decrease in the product's deformation adaptability, impact resistance, and crack resistance, making it unsuitable for the deformation and seismic resistance requirements of dry-hanging exterior walls. In Comparative Example 2, the core structure of the present invention, the alkali-resistant polypropylene mesh membrane, was removed, resulting in a significant deterioration in the product's anchoring performance, interlayer bonding performance, and impact resistance, making the overall structural integrity unsuitable for long-term use. In Comparative Example 3, no dry-hanging components were pre-embedded inside the substrate, failing to realize the integrated installation advantages of prefabricated dry-hanging and losing the core application value of the present invention for prefabricated building scenarios. In Comparative Example 4, a commercially available conventional rock wool board, is the closest existing technology to the present invention, and all its core performance characteristics are significantly inferior to all embodiments of the present invention, failing to simultaneously meet the comprehensive usage requirements of high-strength anchoring, crack and seismic resistance, low thermal conductivity insulation, and high-temperature fire resistance, highlighting the significant performance advantages of the present invention compared to existing technologies.

[0055] By comparing and analyzing the relevant data in the table, it can be seen that the high-strength thermal insulation rock wool building board produced by this invention, through core technologies such as integrated flexible buffer strip arrangement, precise positioning and avoidance of dry-hanging components, and segmented temperature and pressure synergistic curing, significantly outperforms conventional commercially available rock wool boards in key indicators such as anchor pull-out force of hanging components, interlayer peel strength, critical deformation rate of board cracking, dimensional stability, impact resistance, and high-temperature resistance. Compared with the comparative example without the core structure, the mechanical load-bearing capacity, deformation adaptability, and durability of the product of this invention are greatly improved, effectively solving the industry pain points of traditional rock wool boards such as easy detachment during dry hanging, easy cracking under stress, large thermal bridge loss, and easy pulverization at high temperatures. At the same time, it takes into account excellent thermal insulation effect and structural stability, fully meeting the dual needs of energy-saving thermal insulation of building exterior walls and dry-hanging installation. This shows that the high-strength thermal insulation rock wool building board and its preparation method provided by this invention conform to the development trend of energy conservation and prefabricated construction in the field of building engineering, has excellent practical value and application potential, has a broader market prospect, and is more suitable for promotion.

[0056] In the description of this specification, references to terms such as "an experiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that experiment or example is included in at least one experiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same experiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more experiments or examples.

[0057] The preferred experiments disclosed above are merely illustrative of the invention. These preferred experiments do not exhaustively describe all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these experiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-strength thermal insulation rock wool building board, characterized in that, Includes rock wool board substrate, flexible buffer strip, alkali-resistant polypropylene mesh film, dry hanging components, ring buffer pads, and inorganic heat insulation pads; The rock wool board substrate is an energy-saving thermal insulation material for building exterior walls, with a dry density of 140 kg / m³. 3 ~160kg / m 3 It is made of rock wool fiber that has been cured and pressed into shape using a bio-based inorganic composite binder; Flexible buffer strips are arranged horizontally and at equal intervals along the entire length inside the rock wool board matrix. The center-to-center distance between adjacent flexible buffer strips is 180mm to 220mm, the width of a single flexible buffer strip is 8mm to 12mm, and the thickness of the flexible buffer strip is the same as the thickness of the rock wool board matrix. The flexible buffer strip and the rock wool fiber of the rock wool board matrix are laid together and pressed into a single piece. The rock wool board substrate has a layer of alkali-resistant polypropylene mesh film on both the front and back sides, and the thickness of the alkali-resistant polypropylene mesh film is 0.15mm to 0.25mm. Four sets of dry-hanging brackets are pre-embedded inside the rock wool board substrate. The four sets of dry-hanging brackets are arranged in a rectangle of 380mm~420mm×380mm~420mm. The dry-hanging brackets are L-shaped structures. The long side of the bracket is inserted into the rock wool board substrate and penetrates the alkali-resistant polypropylene mesh film on one side of the installation surface. The root of the pre-embedded end is mechanically locked to the alkali-resistant polypropylene mesh film on the same side through a flange structure. The pre-embedded depth of the dry-hanging bracket is 1 / 3 to 1 / 2 of the thickness of the rock wool board substrate. The end of the pre-embedded end is provided with a barbed anchoring structure to form a reinforced anchor with the internal fibers of the rock wool board substrate. The short side is the exposed installation end, which is provided with an elongated hole adjustment structure. The elongated hole is opened in the horizontal direction and the adjustment stroke is 12mm~18mm. An annular buffer pad is fitted at the root of the pre-embedded end of the dry-hanging component. The material of the annular buffer pad is the same as that of the flexible buffer strip. The thickness of the annular buffer pad is 4mm to 6mm and the diameter of the annular buffer pad is 25mm to 35mm. Inorganic heat insulation pads are provided on the contact surfaces between the dry-hanging components and the rock wool board substrate, and inorganic heat insulation pads of the same specifications are provided on the connection surfaces between the dry-hanging components and the external installation keel. The thickness of the inorganic heat insulation pads is 3mm. The flexible buffer strip is arranged in a way that avoids the pre-embedded position of the dry-hanging component, and the distance between the pre-embedded point of the dry-hanging component and the edge of the flexible buffer strip is 50mm to 100mm.

2. The high-strength thermal insulation rock wool building board according to claim 1, characterized in that, The flexible buffer strip is made of basalt fiber needle-punched felt.

3. The high-strength thermal insulation rock wool building board according to claim 1, characterized in that, The material of the dry-hanging component is 316 stainless steel.

4. The high-strength thermal insulation rock wool building board according to claim 1, characterized in that, The rock wool fiber is prepared from the following raw materials in parts by weight, with a total of 100 parts: 50-58 parts basalt, 15-22 parts blast furnace slag, 8-12 parts stainless steel tailings, 2-4 parts red mud, 1-3 parts borax, and the remainder being fluxing auxiliary materials.

5. A method for preparing a high-strength thermal insulation rock wool building board, characterized in that, The method for preparing a high-strength thermal insulation rock wool building board according to any one of claims 1-4 includes the following steps: S1. Raw material pretreatment and melt fiber formation: Weigh the rock wool fiber raw materials according to the formula, grind them to ≤5% residue on a 200-mesh sieve, mix and homogenize them, pre-sinter at 800℃~900℃ for 15min~25min, then melt at 1440℃~1460℃ for 30min~40min, control the melt exit temperature at 1420℃~1440℃, and prepare rock wool fibers through a four-stage centrifugal fiber forming machine; S2. Flexible buffer strip pretreatment and felt laying composite: The flexible buffer strip is roughened by atmospheric pressure jet plasma equipment, and the surface roughness Ra of the flexible buffer strip after treatment is 2.0μm~3.0μm; During the process of laying rock wool fiber felt, a continuous flexible buffer strip is laid every 180mm to 220mm along the horizontal direction, and the rock wool fiber and the flexible buffer strip are laid simultaneously to form the rock wool felt matrix. S3. Pre-laying of mesh film: A layer of alkali-resistant polypropylene mesh film is pre-laid on the upper and lower surfaces of the rock wool felt substrate; S4. Adhesive impregnation and vacuum degumming: The rock wool felt matrix after pre-laying the mesh film is impregnated in a bio-based inorganic composite adhesive, and then subjected to double roller impregnation treatment. After impregnation, it is subjected to vacuum degumming treatment. The bio-based inorganic composite adhesive is prepared from enzymatically hydrolyzed lignin-based bio-resin, potassium silicate solution with a modulus of 3.8 to 4.2, nano-silica sol, curing accelerator, and deionized water. The adhesive has a solid content of 40% to 50% and a viscosity of 150 mPa·s to 200 mPa·s at 25°C. S5. Pre-installed component positioning and installation: On the impregnated rock wool felt substrate, dry-hanging components are positioned in a rectangular distribution of 380mm~420mm×380mm~420mm. The distance between the pre-embedded points of the dry-hanging components and the edge of the flexible buffer strip is 50mm~100mm. The dry-hanging bracket vertically penetrates the alkali-resistant polypropylene mesh film on one side of the rock wool felt substrate installation surface. A ring-shaped buffer pad is fitted at the root of the pre-embedded end so that the pad fits between the mesh film and the short side of the bracket. It is inserted to the preset pre-embedded depth and mechanically locked and fixed with the alkali-resistant polypropylene mesh film on that side through the root flange structure. Inorganic heat insulation pads are placed on the contact surface between the dry-hanging components and the rock wool felt substrate; S6. Segmented temperature and pressure co-curing molding: The positioned rock wool felt matrix is ​​sent into a pressure curing oven and cured in four stages: pre-curing stage temperature 105℃~115℃, pressure 0.12MPa~0.18MPa, constant temperature and pressure 12min~18min; The main curing section temperature is 175℃~185℃, the pressure is 0.22MPa~0.28MPa, and the constant temperature and pressure is maintained for 25min~35min; The post-curing section temperature is 145℃~155℃, the pressure is 0.18MPa~0.22MPa, and the constant temperature and pressure is maintained for 15min~25min; The cooling section is cooled from 145℃ to 155℃ to 55℃ to 65℃ at a linear cooling rate of 1.5℃ / min to 2.5℃ / min, while the pressure is simultaneously and linearly reduced to atmospheric pressure. Then it is naturally cooled to room temperature to obtain a rock wool slab blank. S7. Thickness-fixed cutting and finished product inspection: The rock wool board blank is rolled and polished with a thickness-fixed roller, and then cut to the target specifications to obtain the finished high-strength thermal insulation rock wool building board.

6. The method for preparing a high-strength thermal insulation rock wool building board according to claim 5, characterized in that, The speeds of the four rollers in the centrifugal fiber forming machine are 2800r / min~3200r / min, 4300r / min~4700r / min, 5800r / min~6200r / min, and 7000r / min~7400r / min respectively. The melt flow rate is controlled at 1.5t / h~2.0t / h, the fiber forming air temperature is 350℃~380℃, and the air pressure is 6kPa~8kPa.

7. The method for preparing a high-strength thermal insulation rock wool building board according to claim 5, characterized in that, The processing parameters for the roughening treatment of the plasma equipment are: power 180W~220W, argon flow rate 4L / min~6L / min, distance between nozzle and buffer bar surface 8mm~12mm, and processing time 25s~35s.

8. The method for preparing a high-strength thermal insulation rock wool building board according to claim 5, characterized in that, The dual-roller impregnation pressures are 0.1MPa~0.2MPa and 0.25MPa~0.35MPa respectively. The vacuum degree of the core layer after vacuum degumming is -0.10MPa~-0.08MPa, and the vacuum degree of the surface layer is -0.07MPa~-0.05MPa.

9. A method for preparing a high-strength thermal insulation rock wool building board according to claim 5, characterized in that, The curing accelerator of the bio-based inorganic composite adhesive is 2-ethyl-4-methylimidazole.

10. A method for preparing a high-strength thermal insulation rock wool building board according to claim 5, characterized in that, The roller pressure for thickness rolling is 0.3MPa~0.5MPa, the linear speed is 8m / min~10m / min, and the thickness tolerance is controlled within ±0.5mm.

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