CN111153649A

CN111153649A - Preparation method of inorganic lightweight aggregate insulation board

Info

Publication number: CN111153649A
Application number: CN202010004900.9A
Authority: CN
Inventors: 郑鹏; 虞雅琴
Original assignee: Anhui Mingyuan New Building Material Technology Co ltd
Current assignee: Anhui Mingyuan New Building Material Technology Co ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-05-15

Abstract

The invention discloses a preparation method of an inorganic lightweight aggregate insulation board, which comprises the following steps: preparing portland cement powder, and uniformly mixing the portland cement powder, cellulose and inorganic reinforcing fiber to form a powdery mixed material; uniformly mixing water and a water reducing agent to form a liquid mixed material; mixing the powdery mixed material and the liquid mixed material, and adding an early strength agent, an antifreeze agent and a water repellent to obtain viscous composite slurry; stirring and mixing the expanded perlite and the composite slurry until the surface of the expanded perlite is uniformly coated with a layer of composite slurry material to obtain a light prepressing material; pressurizing the lower template and the upper template, and compressing to form a plate blank; shaping the plate blank; steam curing in curing equipment to finally prepare a finished product of the insulation board; the invention increases the surface area of the composite slurry coating on the surface of the expanded perlite, improves the roughness of the lattice defect and enhances the self-healing capability.

Description

Preparation method of inorganic lightweight aggregate insulation board

Technical Field

The invention relates to the technical field of insulation boards, in particular to a preparation method of an inorganic light aggregate insulation board.

Background

The heat-insulating board is a hard foamed plastic board made up by using polystyrene resin as raw material, adding other raw auxiliary materials and polymer, heating, mixing and simultaneously injecting catalyst, then extruding and forming, and has the functions of resisting moisture and resisting water, and can reduce the thickness of external enclosure structure of building so as to increase indoor usable floor area.

The existing insulation board has poor performance, can not realize superfine grinding of the surface, and has low roughness of lattice defects and poor self-healing performance.

In view of the drawbacks, the inventors have finally obtained the present invention through long-term research and practice.

Disclosure of Invention

In order to solve the technical defects, the invention adopts the technical scheme that a preparation method of the inorganic lightweight aggregate insulation board is provided, and the prepared inorganic lightweight aggregate insulation board comprises the following raw materials in parts by weight: 130-150 parts of expanded perlite, 55-65 parts of portland cement powder, 4-7 parts of cellulose, 5-6 parts of inorganic reinforced fiber, 0.5-2 parts of early strength agent, 0.5-2 parts of antifreeze agent, 0.5-2 parts of water reducing agent, 3-6 parts of hydrophobic agent and 88-95 parts of water;

the preparation method of the inorganic lightweight aggregate insulation board comprises the following steps:

s1, preparing the portland cement powder, and uniformly mixing the portland cement powder, the cellulose and the inorganic reinforcing fibers in proportion to form a powdery mixed material;

s2, uniformly mixing water and the water reducing agent in proportion to form a liquid mixed material;

s3, mixing the powdery mixture obtained in the step S1 and the liquid mixture obtained in the step S2 together, adding the early strength agent, the antifreeze agent and the water repellent agent in proportion, and stirring to obtain viscous composite slurry;

s4, stirring and mixing the expanded perlite and the composite slurry obtained in the step S3 for 2min according to the proportion until the surface of the expanded perlite is uniformly coated with a layer of composite slurry material to obtain a light prepressing material;

s5, paving the light prepressing material obtained in the step S4 on a lower template of a die, pressurizing through an upper template, compressing to form a plate blank, and demoulding and shaping the plate blank;

and S6, placing the plate blanks in curing equipment for steam curing, and finally preparing the finished product of the insulation board with the water content of less than or equal to 10%.

Preferably, the chemical composition mass fraction of the portland cement powder is 65-75% of CaO and 18-24% of SiO₂、5％～7％Al₂O₃、2％～3％Fe₂O₃、1.2％～3％SO₃。

Preferably, the raw materials of the silicate cement powder comprise 75-85% of limestone, 1-15% of siliceous materials, 0.5-15% of aluminum materials, 0.5-3% of iron materials and 2-5% of industrial gypsum by mass percentage; the mass fraction of CaO in the limestone is controlled to be 48-53 percent; the siliceous raw material is selected from one or more of silica, sandstone, shale or slag, and SiO in the siliceous raw material₂The mass fraction of the catalyst is controlled to be 65-90 percent; the aluminum raw material is selected from one or more of clay, shale, kaolin, coal gangue or fly ash, and Al in the aluminum raw material₂O₃The mass fraction of (A) is controlled to be 15-25%; the iron raw material is selected from one or more of sulfuric acid slag, converter slag, iron ore or iron tailings, and Fe in the iron raw material₂O₃The mass fraction of the active carbon is controlled to be 40-70 percent; the industrial gypsum is one or more of desulfurized gypsum, phosphogypsum, fluorgypsum or salt gypsum, and SO in the industrial gypsum₃The mass fraction of (A) is controlled to be 30-48%.

Preferably, the industrial gypsum is desulfurized gypsum, and the desulfurized gypsum is used after being sintered at high temperature.

Preferably, the cellulose is PP fiber; the specifications of the PP fibers are 3mm, 6mm and 9mm, and the weight of the 3mm PP fibers, the weight of the 6mm PP fibers and the weight of the 9mm PP fibers are the same.

Preferably, the inorganic reinforcing fiber is one or more of wollastonite fiber, gypsum whisker, brucite fiber and sepiolite fiber.

Preferably, the early strength agent is one or more of triethanolamine, sodium chloride and sodium nitrite.

Preferably, the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.

Preferably, in the step S7, after the slab and the mold are left standing in the curing equipment for 2 hours, the slab and the mold are gradually heated and humidified, the humidity is kept at 90%, the temperature is raised from room temperature to 95 ℃ within 2.5 hours, the initial temperature raising speed is 20 ℃/h, and the later temperature raising speed is 40 ℃/h; stopping heating after the temperature is raised to 95 ℃, sealing the plate blank in the maintenance equipment for 6 hours, and naturally cooling, wherein the humidity is still kept at 90%; and then dehumidifying through the maintenance equipment, and finally demoulding the plate blank from the mould, wherein the water content of the finished product of the demoulded insulation board is less than or equal to 10%.

Preferably, in step S1, the method for preparing the portland cement powder comprises:

s11, respectively crushing the limestone, the siliceous raw material, the aluminum raw material, the ferrous raw material and the industrial gypsum until the particle size is less than or equal to 70mm, and storing the crushed materials after pre-homogenization;

s12, uniformly mixing the limestone, the siliceous raw material, the aluminum raw material, the ferrous raw material and the industrial gypsum raw material according to a proper proportion, drying and grinding, wherein the qualified finished product after screening and grinding is cement raw material which is stored in a raw material homogenizing warehouse;

s13, sending the homogenized cement raw material to a preheater for preheating and decomposition, then calcining at 1300-1350 ℃ for 8-10 min in a rotary kiln to obtain a partially molten material with a liquid phase amount of 20-30%, and rapidly cooling the discharged material.

Compared with the prior art, the invention has the beneficial effects that: 1, independently preparing and processing components of portland cement powder to obtain an ultrafine grinding surface, and performing acid-base dual excitation on alkaline cement powder and acidic expanded perlite to increase the surface area of a composite slurry coating on the surface of the expanded perlite, improve the roughness of lattice defects and enhance the self-healing capability; 2, through maintenance operation in the preparation process can be realized to the structure setting of maintenance equipment, when guaranteeing whole humidity, accurate control heating rate can realize quick dehumidification simultaneously in the dehumidification operation of later stage to can obtain the good and high-quality heated board finished product that the moisture content is low of maintenance effect.

Drawings

FIG. 1 is a flow chart of a preparation method of the inorganic lightweight aggregate insulation board;

FIG. 2 is a structural view of the curing apparatus in a closed state;

FIG. 3 is a structural view of the maintenance device in an unzipped state;

FIG. 4 is a view of the attachment structure of the storage panel;

FIG. 5 is a structural front view of the storage panel;

FIG. 6 is a structural side view of the storage panel;

FIG. 7 is a top view of the storage panel.

The figures in the drawings represent:

1-a box body; 2-a storage rack; 3-an air outlet component; 4-a suction assembly; 5-ventilating duct; 6-a storage plate; 7-a plate blank; 21-a pulley; 22-a chute bar; 23-a chute; 24-a positioning groove; 31-air outlet plate; 32-a fixed plate; 33-air outlet; 41-a wind suction plate; 42-an air suction opening; 43-a first via hole; 44-a second communication hole; 51-a first vent; 52-second vent; 61-a rectangular frame; 62-a material blocking rod; 63-a baffle; 64-adjusting rod; 65-a first paddle; 66-a second paddle; 67-axial grooves; 68-a regulation hole; 69-an adjusting block; 70-an elastic member; 71-locking groove.

Detailed Description

The described and additional features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

Example one

The inorganic lightweight aggregate insulation board prepared by the invention comprises the following raw materials in parts by weight: 140 parts of expanded perlite, 60 parts of portland cement powder, 6 parts of cellulose, 5 parts of inorganic reinforced fiber, 1 part of early strength agent, 1 part of antifreeze agent, 1 part of water reducing agent, 4 parts of water repellent and 90 parts of water.

Wherein the mass fraction of the mineral composition of the portland cement powder is 65-75 percent of C₃S、10％～20％C₂S、6％～12％C₄AF、4％～7％C₄A₃S; the mass fraction of the f-CaO is controlled to be 0.5-1.5%, the mass fraction of the cubic liter weight is controlled to be 1280-1400 g/L, and the total amount of silicate minerals is more than 70%.

The chemical composition mass fraction of the Portland cement powder is 65-75% of CaO and 18-24% of SiO₂、5％～7％Al₂O₃、2％～3％Fe₂O₃、1.2％～3％SO₃And minor amounts of other oxides.

The raw materials of the silicate cement powder comprise 75-85% of limestone, 1-15% of siliceous raw materials, 0.5-15% of aluminum raw materials, 0.5-3% of iron raw materials and 2-5% of industrial gypsum by mass percentage.

Wherein, in the raw meal, the mass fraction of CaO in the limestone is controlled to be 48-53%; the siliceous raw material is selected from one or more of silica, sandstone, shale or slag, and SiO in the siliceous raw material₂The mass fraction of the catalyst is controlled to be 65-90 percent; the aluminum raw material is selected from one or more of clay, shale, kaolin, coal gangue or fly ash, and Al in the aluminum raw material₂O₃The mass fraction of (A) is controlled to be 15-25%; the iron raw material is selected from one or more of sulfuric acid slag, converter slag, iron ore or iron tailings, and Fe in the iron raw material₂O₃The mass fraction of the active carbon is controlled to be 40-70 percent; the industrial gypsum is gypsumOne or more of sulfur gypsum, phosphogypsum, fluorgypsum or salt gypsum, and SO in the industrial gypsum₃The mass fraction of (A) is controlled to be 30-48%.

Preferably, the industrial gypsum is desulfurized gypsum which needs to be used after being sintered at high temperature, so that the early strength of the cement can be improved, and the water is absorbed and supplied to the cement at the later stage to ensure the humidity of the cement in the maintenance period.

The portland cement powder is prepared by crushing, homogenizing, proportioning, drying and grinding to prepare cement raw materials, preheating, decomposing and calcining the cement raw materials at high temperature, and then quickly cooling.

The cellulose is PP fiber, so that the water retention effect in the cement curing process is realized, and preferably, the specifications of the PP fiber are 3mm, 6mm and 9mm, and the PP fiber with the diameter of 3mm, the PP fiber with the diameter of 6mm and the PP fiber with the diameter of 9mm respectively account for 2 parts, so that 6 parts of the cellulose in the raw material is formed; the inorganic reinforced fiber is one or more of wollastonite fiber, gypsum whisker, brucite fiber and sepiolite fiber, and the tensile strength and the flexibility of the inorganic light aggregate insulation board are improved.

The early strength agent is one or more of triethanolamine, sodium chloride and sodium nitrite; the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.

As shown in fig. 1, fig. 1 is a flow chart of a preparation method of the inorganic lightweight aggregate insulation board; the preparation method of the inorganic lightweight aggregate insulation board comprises the following steps:

Specifically, in step S6, standing the slab in the curing equipment for 2 hours, gradually heating and humidifying, keeping the humidity at 90%, heating the temperature from room temperature to 95 ℃ within 2.5 hours, wherein the initial heating rate is 20 ℃/h, and the later heating rate is 40 ℃/h; stopping heating after the temperature is raised to 95 ℃, sealing the plate blank in the maintenance equipment for 6 hours, and naturally cooling, wherein the humidity is still kept at 90%; then dehumidifying through the maintenance equipment, and finally demoulding the plate blank from the mould, wherein the water content of the finished product of the demoulded insulation board is less than or equal to 10%; the dehumidification can be realized by adopting wind circulation dehumidification.

Specifically, in step S1, the preparation method of the portland cement powder includes:

In the step S12, the cement raw meal has a moisture mass fraction of 1.0 wt% or less, and the screen residue is required to be 2.0 wt% or less by screening through a 20mm square mesh screen.

In the step S13, the preheater is a double-section preheater, the outlet temperature of the primary cylinder of the preheater is 280-300 ℃, the outlet temperature of the secondary cylinder of the preheater is 820-850 ℃, and the calcining temperature of the rotary kiln is 1300-1350 ℃.

In the invention, the components of the silicate cement powder are separately prepared and processed to obtain the superfine powder grinding surface, and the alkaline cement powder and the acidic expanded perlite are subjected to acid-base double excitation, so that the surface area of the composite slurry coating on the surface of the expanded perlite is increased, the roughness of lattice defects is improved, and the self-healing capability is enhanced.

The Portland cement powder adopted by the invention has the advantages of high early strength, high later strength increase rate, short setting time, low sintering temperature, small volume shrinkage and the like. The sulphoaluminate mineral has the advantages of high hydration speed, high early strength, good durability and the like, and the performance of the traditional portland cement can be obviously improved by introducing the sulphoaluminate mineral into cement powder.

In the preparation process, the industrial gypsum is used for replacing part of limestone, contains oxygen-enriched minerals of various trace elements such as sulfur, aluminum, iron and the like, is beneficial to increasing the phase quantity of clinker liquid, reducing the viscosity of liquid phase, reducing the calcination temperature of the clinker and promoting the formation of tricalcium silicate and calcium sulphoaluminate minerals in the clinker. The raw material system components are increased, the lowest eutectic temperature of the materials is reduced, the liquid phase appears in advance when the clinker is calcined, and the clinker calcining temperature is reduced. The mass fraction of the oxygen-rich mineral substances in the cement raw material is increased, the liquid phase quantity is increased after the material reaches the eutectic temperature, the liquid phase viscosity is reduced, and the calcium oxide and the dicalcium silicate are dissolved in the liquid phase to generate tricalcium silicate and calcium sulphoaluminate.

Meanwhile, the invention uses the industrial gypsum to replace part of limestone, reduces the consumption of high-quality limestone in the cement industry, and reduces CO₂The emission of greenhouse gases meets the national requirements of energy conservation and emission reductionAnd (4) environmental protection policy. The cement raw material utilizes industrial gypsum to replace part of limestone, and the industrial gypsum is decomposed to produce calcium oxide and SO_xWithout CO generation₂Gas, mostly SO_xAnd calcium oxide to produce calcium sulphoaluminate mineral.

The invention consumes a large amount of industrial solid wastes such as coal gangue, iron tailings, industrial gypsum and the like, changes waste into valuable, is beneficial to protecting and improving ecological environment, and has important economic, social and environmental benefits.

Example two

One embodiment of the preparation method of the portland cement powder is as follows:

s11, crushing the limestone until the screen residue of a 70mm square-hole sieve is less than 10%, storing the crushed limestone in a limestone shed after pre-homogenization, and storing the raw materials such as the shale, the kaolin, the pyrite cinder, the phosphogypsum and the like in a combined storage tank after homogenization;

s12, uniformly mixing 75% of limestone, 8% of shale, 10% of kaolin, 2% of iron powder and 5% of desulfurized gypsum according to the mass fraction ratio, wherein the mass fraction of CaO in the limestone is controlled to be 51% -52%, and the mass fraction of SiO in the shale is controlled to be 51% -52%₂The mass fraction of the kaolin is 68-70 percent, and Al in the kaolin is₂O₃The mass fraction of the iron powder is 16-20 percent, and the iron powder contains Fe₂O₃65-70 percent of SO in the desulfurized gypsum₃The mass fraction of (A) is 40-45%:

s13, feeding the mixed material into a vertical mill for drying and grinding, screening a finished product with the water content of less than or equal to 1.0 wt% and the residue sieved by a 20mm square-hole sieve of less than or equal to 2.0 wt% as a cement raw material, and feeding the cement raw material into a raw material homogenizing warehouse for storage;

s14, conveying the homogenized raw meal to a preheater for preheating and decomposition, wherein the preheater is a two-section preheater, and the outlet temperature of a primary cylinder of the preheater is controlled to be 280 ℃ and the outlet temperature of a secondary cylinder of the preheater is controlled to be 830 ℃; then calcining the material in a rotary kiln at high temperature, wherein the specification of the rotary kiln is phi 4.8X74m, and the calcining temperature is controlled to 1350 ℃; and (3) rapidly cooling the material to 90 ℃ by a 4.2X34m grate cooler to obtain the portland cement powder.

The indexes of the portland cement powder are controlled to be f-CaO between 0.5 and 1.5 percent and the vertical lifting weight between 1280 and 1400 g/L.

The clinker rate value range is as follows: KH ═ 0.84 ± 0.02, SM ═ 2.7 ± 0.1, and IM ═ 1.5 ± 0.1.

EXAMPLE III

As shown in fig. 2 and 3, fig. 2 is a structural view of the maintenance equipment in a closed state; FIG. 3 is a structural view of the maintenance device in an unzipped state; the maintenance equipment used in the preparation method of the inorganic lightweight aggregate insulation board comprises a box body 1, wherein an inner cavity is arranged in the box body 1, a storage rack 2 is arranged in the inner cavity, the storage rack 2 is movably connected with the inner wall of the inner cavity, and the box body 1 is also provided with a wind circulating system which is used for controlling the humidity and the temperature of air in the inner cavity.

Preferably, the air circulation system includes an air outlet assembly 3 disposed on the upper portion of the storage rack 2, an air suction assembly 4 disposed on the storage rack 2, and an air duct 5 disposed on the box body 1, the air outlet assembly 3 and the air suction assembly 4 are communicated through the air duct 5, and the air outlet assembly 3 and the air suction assembly 4 are both communicated with the inner cavity. The air duct 5 is provided with two fans, two humidifiers and two heaters, the two fans correspond to the air outlet assembly 3 and the air suction assembly 4 respectively, the humidifier is used for humidifying air in the air duct 5, the heaters are used for heating air in the air duct 5, and generally, the humidifier and the heaters are arranged on the upper portion of the box body 1 and correspond to the air outlet assembly 3.

The storage rack 2 comprises a storage base, a side wall, a sealing plate and a plurality of storage plates 6, the storage base is movably connected with the box body 1 through a first guide rail, the sealing plate is perpendicular to the storage base, the side plates are arranged on two sides of the storage base and are fixedly connected with the storage base and the side wall, and the storage plates 6 are movably connected with the side wall through a second guide rail. The air suction assembly 4 is arranged at the connecting position of the sealing plate and the storage base.

Typically, the inner cavity is provided with an opening corresponding to the storage rack 2 for pulling out the storage rack 2 from the inner cavity. When the storage rack 2 is pushed into the inner cavity, the sealing plate is in a closed state in clamping fit with the opening, sealing operation of the opening is achieved, and the inner cavity is in a closed state.

As shown in fig. 4, fig. 4 is a view of a coupling structure of the storage plate; the second guide rail comprises a pulley 21 and a chute strip 22, the chute strip 22 is fixedly arranged on the side wall, the pulley 21 is arranged at the bottoms of two sides of each storage plate 6, a chute groove 23 extending linearly is arranged on the chute strip 22, the pulley 21 is arranged in the chute groove 23 and can slide along the chute groove 23, and therefore the storage plates 6 can move. Generally, a positioning groove 24 is formed in the slide groove 23, and the depth of the positioning groove 24 is greater than that of the slide groove 23, so that when the pulley 21 moves to the position of the positioning groove 24, the storage board 6 is fixed, that is, the storage board 6 is in a fixed position.

Preferably, when each of the storage plates 6 is at the fixed position, each of the storage plates 6 is arranged in a step shape.

The second guide rail is arranged to facilitate the pulling out of each storage plate 6 from between the two side walls, thereby facilitating the placement of the slabs 7 on the storage plates 6.

Induced draft subassembly 4 is including the board 41 that induced drafts that the slope set up, the board 41 that induced drafts is all fixed to be set up the storing base the lateral wall thereby form sealed aspiration channel on the closing plate, thereby be provided with inlet scoop 42 on the board 41 that induced drafts, be provided with first intercommunicating pore 43 on the storing base, inlet scoop 42 first intercommunicating pore 43 all with the aspiration channel intercommunication, air pipe 5 is provided with second intercommunicating pore 44, works as the closing plate with when the opening is in the closure state, first intercommunicating pore 43 with second intercommunicating pore 44 is in the butt joint state, thereby makes the aspiration channel with air pipe 5 intercommunication.

Air-out subassembly 3 is including setting up air-out board 31 and fixed plate 32 that 2 upper portions slopes of storing frame set up, air-out board 31 with fixed plate 32 parallel arrangement, air-out board 31 with fixed plate 32 forms the air-out pipeline, the air-out pipeline with air pipe 5 intercommunication. The air outlet plate 31 is provided with a plurality of air outlets 33, the air outlets 33 are arranged corresponding to the storage plates 6, and preferably, at least one air outlet 33 is arranged between two storage plates 6.

Each thereby the storing board 6 is thereby the echelonment and arranges messenger the tip of storing board 6 forms an incline line, the contained angle between incline line and the horizontal plane is the storing board 6 slope contained angle, the contained angle that goes out between 31 and the horizontal plane is out 31 slope contained angles, it equals or slightly is less than to go out 31 slope contained angles of play board 6 slope contained angles, thereby be convenient for the air outlet 33 is to adjacent two the non-overlapping part of storing board 6 is bloied, thereby accelerates adjacent two the circulation of air in clearance between the storing board 6 realizes quick heat transfer, improves heating efficiency.

The air is discharged from the air outlet 33 on the air outlet plate 31 and is sucked from the air suction opening 42 on the air suction plate 41, so that the overall flow rate of the air in the inner cavity is improved, the real-time update of the air in the inner cavity is realized, and the temperature and the humidity in the inner cavity are ensured; simultaneously each slab 7 on the storing board 6 makes the inner chamber forms a plurality of circulation of air passageways, air outlet 33 with the diagonal angle setting of inlet scoop 42, and a plurality of air outlet 33 with the corresponding setting of storing board 6 makes the air that gets into the inner chamber evenly passes through each circulation of air passageway guarantees each slab 7 on the storing board 6 is heated evenly, improves maintenance equipment's maintenance ability.

Still be provided with first vent 51 and second vent 52 on ventilation pipe 5, first vent 51 corresponds air-out subassembly 3 sets up, second vent 52 corresponds air-suction subassembly 4 sets up, and is corresponding, first vent 51 is provided with first valve body, second vent 52 is provided with the second valve body, through control first valve body with the second valve body, can realize first vent 51 with air-out subassembly 3's intercommunication, second vent 52 with air-suction subassembly 4's intercommunication. The first ventilation opening 51 and the second ventilation opening 52 are both provided with dehumidifying components, and the dehumidifying components can be multilayer breathable dehumidifying composite films and directly cover the first ventilation opening 51 and the second ventilation opening 52.

Generally, when the maintenance equipment heats and heats the operation, first vent 51 with the connection between the air-out subassembly 3 is sealed, second vent 52 with the connection between the subassembly 4 that induced drafts is sealed, air-out subassembly 3 with induced draft subassembly 4 passes through air pipe 5 intercommunication, induced draft subassembly 4 follows the air warp of inner chamber extraction the humidifier with pass through again after the humidification heating of heater air-out subassembly 3 gets into realize the circulation of air in the inner chamber to reduce energy loss, be convenient for control the inside humidity of inner chamber and temperature.

When the maintenance equipment dehumidifies, first vent 51 with communicate between the air-out subassembly 3, second vent 52 with the subassembly 4 intercommunication that induced drafts, air-out subassembly 3 with the connection between the subassembly 4 that induced drafts is sealed, air-out subassembly 3 with induced draft subassembly 4 is direct and external intercommunication, through induced draft subassembly 4 will the air escape of interior intracavity high humidity, and through air-out subassembly 3 to dry outside air is sent into to the inner chamber to realize quick dehumidification.

Preferably, a detection device is further arranged in the inner cavity and used for detecting the humidity and the temperature of the air in the inner cavity in real time, so that regulation and control are facilitated.

Through the structural arrangement of the maintenance equipment, the maintenance operation in the step S7 can be realized, the heating rate is accurately controlled while the overall humidity is ensured, and meanwhile, the rapid dehumidification can be realized in the later dehumidification operation, so that the high-quality insulation board finished product with good maintenance effect and low water content can be obtained.

Example four

As shown in fig. 5, 6 and 7, fig. 5 is a structural front view of the storage plate; FIG. 6 is a structural side view of the storage panel; FIG. 7 is a top view of the storage panel; the storage plate 6 comprises a rectangular frame 61 and a plurality of material blocking rods 62 connected with the rectangular frame 61, wherein the rectangular frame 61 is arranged inside the material blocking rods 62, the material blocking rods 62 are arranged in parallel, and two ends of the material blocking rods 62 are movably arranged on the rectangular frame 61.

Preferably, the material blocking rod 62 is a cylindrical rod, a baffle 63 is further arranged on the material blocking rod 62, the side end surface of the baffle 63 is fixedly connected with the material blocking rod 62, an adjusting component is further arranged at the end part of the material blocking rod 62, and the adjusting component realizes rotation of the material blocking rod 62, so that the storage plate 6 forms a sealing surface or a hollowed surface.

Due to the fact that the storage plates 6 are arranged in a plurality, the blank 7 can be placed or not placed on the storage plates 6 according to the number of the blanks 7 or other requirements. Generally, when the slab 7 is placed on the storage plate 6, in order to ensure that the end surface of the slab 7 contacting the storage plate 6 can also contact with air to realize heat exchange, the storage plate 6 is configured as a hollow surface. When the plate blank 7 is not arranged on part of the storage plate 6, hot air can quickly pass through the storage plate 6 on the hollow surface due to no blocking of the plate blank 7, so that no air circulation exists in part of the space, and the heat exchange rate is greatly reduced.

The adjusting assembly comprises an adjusting rod 64, a first shifting block 65 and a second shifting block 66, wherein the first shifting block 65 and the second shifting block 66 are arranged on the material blocking rod 62, the second shifting block 66 is arranged on the adjusting rod 64, the first shifting block 65 and the second shifting block 66 are correspondingly arranged, the adjusting rod 64 and the material blocking plate are vertically arranged, the adjusting rod 64 is arranged inside the rectangular frame 61, and the axial movement of the adjusting rod 64 is realized by the relative action of the first shifting block 65 and the second shifting block 66 to realize the rotation of the material blocking rod 62.

Rectangular frame 61 is provided with and sets up the chamber, it corresponds each to set up the chamber keep off material pole 62 and be provided with the connecting hole, keep off material pole 62 tip and pass through the connecting hole sets up set up intracavity portion, it is provided with axial groove 67 to set up the chamber, axial groove 67 is used for placing adjust pole 64, axial groove 67 cross section sets up to circular, and the lower extreme is provided with the breach for place second shifting block 66.

The axial groove 67 is further provided with an adjusting hole 68, an adjusting block 69 is arranged on the adjusting rod 64, the adjusting block 69 is arranged on the adjusting hole 68, and an operator pushes the adjusting block 69 to move the adjusting block 69 in the adjusting hole 68, so that the axial movement of the adjusting rod 64 is realized.

Preferably, an elastic member 70 is disposed at one end of the adjusting rod 64, the elastic member 70 is disposed in the axial groove 67, the elastic member 70 provides axial elastic force for the adjusting rod 64, and the adjusting rod 64 makes the adjusting block 69 be located at one end of the adjusting hole 68 under the action of the axial elastic force, and normally, the storage plate 6 is in a sealing surface state.

The adjusting hole 68 is provided with a locking groove 71, and generally, the adjusting block 69 is pushed to compress the elastic piece 70, so that the storage plate 6 is in a hollow surface state; the adjusting rod 64 is rotated to clamp the adjusting block 69 in the locking groove 71, so that the storage plate 6 is kept in a hollow-out surface state. The second block 66 is a sector-shaped plate so as to still interact with the first block 65 after rotation.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The preparation method of the inorganic lightweight aggregate insulation board is characterized in that the prepared inorganic lightweight aggregate insulation board comprises the following raw materials in parts by weight: 130-150 parts of expanded perlite, 55-65 parts of portland cement powder, 4-7 parts of cellulose, 5-6 parts of inorganic reinforced fiber, 0.5-2 parts of early strength agent, 0.5-2 parts of antifreeze agent, 0.5-2 parts of water reducing agent, 3-6 parts of hydrophobic agent and 88-95 parts of water;

2. The preparation method of the inorganic lightweight aggregate insulation board according to claim 1, wherein the chemical composition mass fraction of the portland cement powder is 65-75% CaO, 18-24% SiO₂、5％～7％Al₂O₃、2％～3％Fe₂O₃、1.2％～3％SO₃。

3. The preparation method of the inorganic lightweight aggregate insulation board according to claim 2, characterized in that the raw material of the Portland cement powder comprises 75-85% of limestone, 1-15% of siliceous material, 0.5-15% of aluminous material, 0.5-3% of irony material and 2-5% of industrial gypsum by mass; the mass fraction of CaO in the limestone is controlled to be 48-53 percent; the siliceous raw material is selected from one or more of silica, sandstone, shale or slag, and SiO in the siliceous raw material₂Quality of (1)The amount fraction is controlled to be 65-90 percent; the aluminum raw material is selected from one or more of clay, shale, kaolin, coal gangue or fly ash, and Al in the aluminum raw material₂O₃The mass fraction of (A) is controlled to be 15-25%; the iron raw material is selected from one or more of sulfuric acid slag, converter slag, iron ore or iron tailings, and Fe in the iron raw material₂O₃The mass fraction of the active carbon is controlled to be 40-70 percent; the industrial gypsum is one or more of desulfurized gypsum, phosphogypsum, fluorgypsum or salt gypsum, and SO in the industrial gypsum₃The mass fraction of (A) is controlled to be 30-48%.

4. The preparation method of the inorganic lightweight aggregate insulation board according to claim 3, wherein the industrial gypsum is desulfurized gypsum, and the desulfurized gypsum is used after being sintered at high temperature.

5. The preparation method of the inorganic lightweight aggregate insulation board according to claim 1, wherein the cellulose is PP fiber, and the specifications of the PP fiber are 3mm, 6mm and 9mm, and the weight of the PP fiber with the specification of 3mm, 6mm and 9mm is the same.

6. The preparation method of the inorganic lightweight aggregate insulation board according to claim 1, wherein the inorganic reinforcing fiber is one or more of wollastonite fiber, gypsum whisker, brucite fiber and sepiolite fiber.

7. The preparation method of the inorganic lightweight aggregate insulation board according to claim 1, wherein the early strength agent is one or more of triethanolamine, sodium chloride and sodium nitrite.

8. The preparation method of the inorganic lightweight aggregate insulation board according to claim 1, characterized in that the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.

9. The method for preparing an inorganic lightweight aggregate insulation board according to claim 1, wherein in the step S7, after the slab together with the mold is left standing in the curing equipment for 2 hours, the slab is gradually heated and humidified, the humidity is maintained at 90%, the temperature is raised from room temperature to 95 ℃ within 2.5 hours, the initial temperature raising speed is 20 ℃/h, and the later temperature raising speed is 40 ℃/h; stopping heating after the temperature is raised to 95 ℃, sealing the plate blank in the maintenance equipment for 6 hours, and naturally cooling, wherein the humidity is still kept at 90%; and then dehumidifying through the maintenance equipment, and finally demoulding the plate blank from the mould, wherein the water content of the finished product of the demoulded insulation board is less than or equal to 10%.

10. The method for preparing an inorganic lightweight aggregate insulation board according to claim 1, wherein in the step S1, the method for preparing the portland cement powder is as follows: