Preparation method of high-strength waterproof rock wool board

Abstract

The invention discloses a preparation method of a high-strength waterproof rock wool board, an inorganic fireproof film on the surface of the high-strength waterproof rock wool board adopts a glass fiber mat inorganic fireproof film of which the surface is permeated with an inorganic silicon nano material water insulation layer, and inorganic fireproof and waterproof films are compounded on the two surfaces of the vertical-wire rock wool board with excellent fireproof and waterproof performance; the inorganic fireproof and waterproof film is compounded with the vertical-wire rock wool board through a quick instant adhesive, and the inorganic fireproof film adopts a glass fiber mat with an inorganic silicon nano material water-proof layer permeated on the surface. An automatic assembly line production mode is adopted, so that the problems of high production cost, complex bonding processing technology, high cost performance and the like of various existing composite rock wool boards are solved; the defects that steam curing maintenance and heating curing are needed, the processing period is long, and large-scale continuous production cannot be achieved are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of rock wool board preparation, and more specifically, to a preparation method of high-strength waterproof rock wool board. Background Art

[0002] Rock wool board, also known as rock wool thermal insulation and decoration board, is made mainly from basalt. The manufacturing process is that first, basalt is melted into magma at high temperature, and then the magma is dripped onto a rapidly rotating flywheel. With the action of the air ring, rock wool is made into rock wool filaments. In the filament-forming chamber, under the combined action of blowing air, induced air and pressure-drawn air, the rock wool filaments fly towards the surface of the cotton collecting wheel and are trapped. In order to increase the adhesiveness between the cotton filaments, a binder needs to be sprayed onto the surface of the cotton filaments after the rock wool is formed into filaments. During the wire-making process, the cotton collecting wheel rotates slowly and evenly. The thin cotton flocs collected on the wheel are multi-layered covered and folded by a subsequent pendulum machine to form a rock wool layer with a certain thickness, and then through processes such as roll pressing, curing, and cutting, a rock wool board is finally made. Rock wool board has the characteristics of light weight, small thermal conductivity, heat absorption, non-combustibility, etc., so it is widely used in industries such as ships, metallurgy, electric power, and construction. At present, the non-combustible thermal insulation materials in the external wall thermal insulation system mainly use building external wall thermal insulation rock wool board, but it has many disadvantages: high water absorption rate, and the thermal insulation pull-out strength and freeze-thaw performance decrease sharply after water absorption, the decorative layer is prone to cracking and falling off, and even the whole falls off; the organizational structure is loose, the tensile strength is relatively low, it is not firmly combined with the wall, the wind resistance is poor, it is easy to fall off, endangering personal safety and increasing the building maintenance cost; for various existing enhanced rock wool boards, there are generally high production costs, complex bonding processing techniques, requiring steam curing maintenance, long heating and curing time, long processing cycle, and unable to achieve large-scale production. Due to the above-mentioned disadvantages, the wide application of external wall thermal insulation rock wool board in the field of building external wall thermal insulation is restricted. At present, in the methods for preparing hydrophobic rock wool board, due to the uneven mixing of the binder and the water repellent, the internal cohesion of the rock wool board is relatively poor, and cracking and falling off will occur after being used for a period of time. Moreover, the uneven mixing of the water repellent results in partial loss of the waterproof performance of the rock wool board, leading to a relatively high water absorption rate. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the present invention provides a preparation method of high-strength waterproof rock wool board to solve the technical problems mentioned in the background art. Technical Solution

[0004] To achieve the above object, the present invention provides the following technical solution: A preparation method of high-strength waterproof rock wool board, comprising the following steps: Step 1: By weight, take 70 - 80 parts of basalt, 15 - 20 parts of shale, and 10 - 15 parts of glass cullet, put them together into a stone crusher for crushing. Feed the crushed stone mixture into the melting section of a tank furnace using a feeder. The high temperature generated by the atomized petroleum combustion sprayed by the nozzle melts the crushed stone mixture to obtain a melt. Let the obtained melt flow onto the first roller of a four-roll centrifuge for dispersion and centrifugation to spin the melt into fibers. The remaining melt is spun onto the second roller to continue manufacturing fibers until the melt is completely made into fibers. Use a slitting device to cut the rock wool board into rock wool strips with the thickness and size required for the product. Add the binder to water to obtain a binder solution; Step 2: Mix basalt, slag, dolomite, and iron ore, crush, melt, and spin the fibers. Add the above-mentioned binder solution to obtain rock wool fibers. Vertically arrange the rock wool strips described in Step 1 through a turning and flipping device, and arrange them in a staggered and closely joined manner with the previous batch of rock wool strips through a pushing device; Step 3: Use a cloth-feeding device to evenly distribute the binder on the inorganic fireproof film bonding surfaces above and below the rock wool strip conveying device. Collect the spun fibers onto the cotton collecting net of a cotton collecting machine, and use a pendulum machine to form multiple layers of loose rock wool layers. After pressing by a cotton pressing machine, form a dense rock wool body. Put the obtained rock wool body into a curing furnace for curing to obtain a rock wool material; Step 4: Weigh 200 - 300 g of molybdenite ore and put it into a high-temperature furnace. Under the condition of introducing air, heat up and hold for roasting to obtain roasted molybdenite. Pour the roasted molybdenite into a beaker and soak it with 300 - 400 mL of ammonia water to obtain a mixed solution. Adjust the pH value of the mixed solution in the beaker with a nitric acid solution, filter to remove the filtrate to obtain a filter residue. Wash the filter residue with deionized water 3 - 5 times. Put the washed filter residue into an oven, heat up, and dry to obtain a yellow powder. Use a cloth-feeding device to evenly distribute the binder on the inorganic fireproof film bonding surfaces above and below the rock wool strip conveying device; Step 5: Convey the inorganic fireproof film evenly coated with the binder in Step 4 and the vertically arranged rock wool strips with staggered and closely joined arrangement in Step 2 into a temperature control device for bonding. Collect the rock wool fibers, add aluminum hydroxide, press, and cure to obtain a flame-retardant and fireproof rock wool board. Cut and package the cured product according to the size.

[0005] The present invention is further set as follows. In Step 4, it also includes adding 80 - 85 g of phenol, 85 - 90 mL of formaldehyde aqueous solution, and 1 - 3 g of sodium hydroxide into a three-necked flask equipped with an electric stirrer. Heat up and hold for reaction. Then add the above-mentioned yellow powder into the three-necked flask, continue to heat up, start the stirrer, and stir for reaction to obtain a reaction product.

[0006] The present invention is further configured such that in step four, 14 - 16 g of liquid paraffin and 20 - 25 g of magnesium ore powder are further added to the above reaction product to obtain a mixed material. The mixed material is added to a three - necked flask, heated and the temperature is raised, the stirrer is started to stir. After heat - retaining reaction, the three - necked flask is connected to a suction port with a rubber tube to evacuate the air, and dehydration is carried out by vacuum distillation. The heat - retaining reaction is continued. When the product in the three - necked flask starts to show gel, the material is discharged. After the temperature drops to room temperature, a high - temperature - resistant phenolic resin is obtained.

[0007] The present invention is further configured such that in step four, the high - temperature - resistant phenolic resin is put into a mortar and ground, and then sieved to obtain resin powder. The resin powder is mixed with ethylene glycol to obtain a modified composite adhesive. The prepared rock wool material, gypsum and the modified composite adhesive are mixed to obtain a mixed slurry, which is poured into a slurry mixer and rotated and stirred. During the stirring process, a sodium hydroxide solution is added to the slurry mixer to obtain a pre - formed slurry. The pre - formed slurry is quickly injected into a stainless - steel mold, and then the mold is moved into a press for pressing and dehydration. The mold is placed in an oven and dried to a constant weight, and then the mold is removed, and a fire - resistant and waterproof rock wool board is obtained.

[0008] The present invention is further configured such that the water content of the binder solution is 3 wt% - 5 wt%.

[0009] The present invention is further configured such that during curing, the temperature is 180 - 200 °C.

[0010] The present invention is further configured such that the temperature of the high temperature generated by the atomized petroleum combustion is 1300 - 1500 °C, and the centrifugal speed is 4000 - 5000 r / min.

[0011] The present invention is further configured such that the adhesive can be instantaneously cured at room temperature by adjusting the ratio and the curing process. Beneficial effects

[0012] Compared with the prior art, the present invention provides a preparation method of a high - strength waterproof rock wool board, and has the following beneficial effects: In the high-strength vertical-filament waterproof rock wool board described in the present invention, the inorganic fireproof film on its surface adopts a fiberglass thin felt inorganic fireproof film with a surface-penetrating inorganic silicon nano material water-blocking layer, which has excellent fireproof and waterproof properties. The vertical-filament rock wool board is composed of vertical-filament rock wool strips with excellent heat insulation performance, a combustion grade of A1, and a bulk density of 100-140 kg / m3, arranged longitudinally with staggered joints and closely joined. It is compounded with the surface inorganic fireproof film through a quick-drying adhesive. After rapid instant normal-temperature curing, the tensile strength perpendicular to the surface reaches more than 80 KPa, which is greater than the national standard of ≥15 KPa for rock wool boards used in external thermal insulation of building exterior walls. In addition, in the present invention, basalt, shale, and glass slag are used as raw materials, which are crushed and then fed into a tank furnace for high-temperature melting. The fibers are centrifugally thrown by a four-roll centrifuge, and the thrown fibers are collected on a collecting net and pressed into a dense rock wool body, and the rock wool material is obtained through curing. Then, molybdenite ore is roasted to obtain roasted molybdenite, which is soaked in ammonia water, the pH is adjusted with nitric acid solution, and then filtered to obtain filter residue. The filter residue is dried to obtain a light yellow powder. Using phenol and aqueous formaldehyde solution as raw materials, sodium hydroxide and the light yellow powder are added, and the reaction product is obtained through heating reaction. Boron acid and magnesium ore powder are added to the reaction product, and after heating and heat preservation reaction and vacuum dehydration, a high-temperature resistant phenolic resin is obtained. The high-temperature resistant phenolic resin is ground to obtain resin powder, and then the resin powder is dissolved in ethylene glycol to obtain a modified composite adhesive. The rock wool material, gypsum, and the modified composite adhesive are mixed and slurried to obtain a preformed slurry, and the preformed slurry is injected into a mold for pressing dehydration and drying to obtain a fireproof and waterproof rock wool board. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the overall flow chart of the preparation method of the high-strength waterproof rock wool board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0015] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0016] In the present invention, unless otherwise stated, the directions such as "up, down" are usually in the directions shown in the drawings, or in the vertical, perpendicular, or gravitational directions; similarly, for ease of understanding and description, "left, right" are usually in the left and right directions shown in the drawings; "inside, outside" refer to the inside and outside relative to the contour of each component itself, but the above direction terms do not limit the present invention.

[0017] Please refer to Figure 1 , the preparation method of the high-strength waterproof rock wool board, comprising the following steps: It includes the following steps: Step 1: By weight, take 80 parts of basalt, 20 parts of shale, and 15 parts of glass cullet, put them together into a stone crusher for crushing. Feed the crushed stone mixture into the melting section of a tank furnace through a feeder. The high temperature generated by the atomized petroleum combustion sprayed by a nozzle melts the crushed stone mixture to obtain a melt. Let the obtained melt flow onto the first roller of a four-roll centrifuge for dispersion and centrifugation to spin the melt into fibers. The remaining melt is spun onto the second roller to continue manufacturing fibers until all the melt is made into fibers. Use a slitting device to cut the rock wool board into rock wool strips with the thickness and size required for the product. Add the binder to water to obtain a binder solution; Step 2: Mix basalt, slag, dolomite, and iron ore, crush, melt, and spin the fibers. Add the above-mentioned binder solution to obtain rock wool fibers. Vertically arrange the rock wool strips in Step 1 through a turning and flipping device, and arrange them in a staggered and closely joined manner with the previous batch of rock wool strips through a pushing device; Step 3: Use a cloth-feeding device to evenly distribute the binder on the inorganic fireproof film bonding surfaces above and below the rock wool strip conveying device. Collect the spun fibers onto the cotton collecting net of a cotton collecting machine, and use a pendulum machine to form multiple layers of loose rock wool layers. After pressing by a cotton pressing machine, form a dense rock wool body. Put the obtained rock wool body into a curing furnace for curing to obtain rock wool materials; Step 4: Weigh 300 g of molybdenite ore and put it into a high-temperature furnace. Under the condition of introducing air, heat up and keep warm for roasting to obtain roasted molybdenite. Pour the roasted molybdenite into a beaker and soak the roasted molybdenite with 400 mL of ammonia water to obtain a mixed solution. Adjust the pH value of the mixed solution in the beaker with a nitric acid solution, filter to remove the filtrate to obtain a filter residue. Wash the filter residue 5 times with deionized water. Put the washed filter residue into an oven, heat up, and dry to obtain a yellow powder. Use a cloth-feeding device to evenly distribute the binder on the inorganic fireproof film bonding surfaces above and below the rock wool strip conveying device; Step 5: Convey the inorganic fireproof film evenly coated with the binder in Step 4 and the vertically arranged rock wool strips with staggered and closely joined alignment in Step 2 into a temperature control device for bonding. Collect the rock wool fibers, add aluminum hydroxide, press, and cure to obtain a flame-retardant and fireproof rock wool board. Cut and package the cured product according to the size.

[0018] In a further embodiment of the present invention, in Step 4, it further includes adding 80 g of phenol, 85 mL of formaldehyde aqueous solution, and 1 g of sodium hydroxide into a three-necked flask equipped with an electric stirrer, heating up, keeping warm for reaction, then adding the above-mentioned yellow powder into the three-necked flask, continuing to heat up, starting the stirrer, and stirring for reaction to obtain a reaction product.

[0019] In a further embodiment of the present invention, in step four, 14 - 16 g of liquid paraffin and 20 - 25 g of magnesium ore powder are further added to the above reaction product to obtain a mixed material. The mixed material is added to a three - necked flask, heated and the temperature is raised, the stirrer is started to stir. After heat - preservation reaction, the three - necked flask is connected to the air - extraction port with a rubber tube to evacuate, and dehydration is carried out by vacuum distillation. The heat - preservation reaction is continued. When the product in the three - necked flask begins to show gel, it is discharged. After the temperature drops to room temperature, a high - temperature - resistant phenolic resin is obtained. Example

[0020] A preparation method of a high - strength waterproof rock wool board, comprising the following steps: Comprising the following steps: Step one: By weight, take 70 parts of basalt, 15 parts of shale, and 10 parts of glass slag and put them into a stone crusher for crushing. The crushed stone mixture is fed into the melting section of a tank furnace by a feeder. The high temperature generated by the atomized petroleum combustion sprayed by a nozzle melts the crushed stone mixture to obtain a melt. The obtained melt flows onto the first roller of a four - roll centrifuge for dispersion, and centrifugation is carried out to spin the melt into fibers. The remaining melt is spun onto the second roller to continue manufacturing fibers until the melt is completely made into fibers. The rock wool board is cut into rock wool strips with the thickness and size required for the product by a slitting device. The binder is added to water to obtain a binder solution; Step two: Mix basalt, slag, dolomite, and iron ore, crush, melt, and spin - draw, add the above - mentioned binder solution to obtain rock wool fibers. The rock wool strips in step one are vertically arranged through a turning and flipping device, and are arranged in a staggered and closely - joined manner with the previous batch of rock wool strips before and after through a pushing device; Step three: Use a cloth - spreading device to evenly spread the binder on the inorganic fire - proof film bonding surfaces above and below the rock wool strip conveying device. The spun - out fibers are collected on the cotton - collecting net of a cotton - collecting machine, and a multi - layer loose rock wool layer is formed by a pendulum machine. After being pressed by a cotton - pressing machine, a dense rock wool body is formed. The obtained rock wool body is put into a curing furnace for curing to obtain a rock wool material; Step four: Weigh 200 g of molybdenite ore and put it into a high - temperature furnace. Under the condition of introducing air, heat and raise the temperature, and carry out heat - preservation roasting to obtain roasted molybdenite. Pour the roasted molybdenite into a beaker, soak the roasted molybdenite with 300 mL of ammonia water to obtain a mixed solution. Adjust the pH value of the mixed solution in the beaker with a nitric acid solution, filter to remove the filtrate to obtain a filter residue. Wash the filter residue 3 - 5 times with deionized water. Put the washed filter residue into an oven, heat and raise the temperature, and after drying, obtain a yellow powder. Use a cloth - spreading device to evenly spread the binder on the inorganic fire - proof film bonding surfaces above and below the rock wool strip conveying device; Step Five: Convey the inorganic fireproof film evenly coated with the binder and the vertically arranged rock wool strips neatly arranged in staggered joints in Step 2 into the temperature control device for fitting, collect the rock wool fibers, add aluminum hydroxide, press and cure to obtain a flame-retardant fireproof rock wool board. The cured product is cut and packaged according to the size.

[0021] In a further embodiment of the present invention, in Step Four, it further includes putting the high-temperature resistant phenolic resin into a mortar for grinding, sieving to obtain resin powder, mixing the resin powder with ethylene glycol to obtain a modified composite adhesive, mixing the prepared rock wool material, gypsum and the modified composite adhesive to obtain a mixed slurry, pouring it into a slurry mixer, rotating and stirring, adding a sodium hydroxide solution to the slurry mixer during the stirring process to obtain a preformed slurry, quickly injecting the preformed slurry into a stainless steel mold, then moving the mold into a press for pressing and dewatering, putting the mold into an oven, drying to a constant weight and then demolding to obtain a fireproof and waterproof rock wool board. The water content of the binder solution is 3wt%. During curing, the temperature is 180°C. The temperature of the high temperature generated by the atomized petroleum combustion is 1300°C, and the centrifugal speed is 4000r / min. The adhesive can be cured and bonded at room temperature immediately by adjusting the ratio and the curing process.

[0022] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Preparation method of high-strength waterproof rock wool board, characterized in that It includes the following steps: Step 1: By weight, take 70 - 80 parts of basalt, 15 - 20 parts of shale, and 10 - 15 parts of glass cullet, put them together into a stone crusher for crushing. Feed the crushed stone mixture into the melting section of a tank furnace by a feeder. The high temperature generated by the atomized petroleum combustion sprayed by a nozzle melts the crushed stone mixture to obtain a melt. Let the obtained melt flow onto the first roller of a four-roll centrifuge for dispersion and centrifugation to spin the melt into fibers. The remaining melt is spun onto the second roller to continue manufacturing fibers until all the melt is made into fibers. Use a slitting device to cut the rock wool board into rock wool strips with the thickness and size required for the product. Add the binder to water to obtain a binder solution; Step 2: Mix basalt, slag, dolomite, and iron ore, crush, melt, and spin the fibers, then add the above-mentioned binder solution to obtain rock wool fibers. Vertically arrange the rock wool strips in Step 1 through a turning and flipping device, and arrange them in a staggered and closely joined manner with the previous batch of rock wool strips through a pushing device; Step 3: Use a cloth-feeding device to evenly distribute the binder on the inorganic fireproof film bonding surfaces above and below the rock wool strip conveying device. Collect the spun fibers onto the cotton collecting net of a cotton collecting machine, and use a pendulum machine to form multiple layers of loose rock wool layers. After pressing by a cotton pressing machine, form a dense rock wool body. Put the obtained rock wool body into a curing furnace for curing to obtain rock wool materials; Step 4: Weigh 200 - 300 g of molybdenite ore and put it into a high-temperature furnace. Under the condition of introducing air, heat up and keep the temperature for roasting to obtain roasted molybdenite. Pour the roasted molybdenite into a beaker and soak the roasted molybdenite with 300 - 400 mL of ammonia water to obtain a mixed solution. Adjust the pH value of the mixed solution in the beaker with a nitric acid solution, filter to remove the filtrate to obtain a filter residue. Wash the filter residue with deionized water 3 - 5 times. Put the washed filter residue into an oven, heat up, and dry to obtain a yellow powder. Use a cloth-feeding device to evenly distribute the binder on the inorganic fireproof film bonding surfaces above and below the rock wool strip conveying device; Step 5: Convey the inorganic fireproof film evenly coated with the binder in Step 4 and the vertically arranged rock wool strips with staggered and closely joined alignment in Step 2 into a temperature control device for lamination. Collect the rock wool fibers, add aluminum hydroxide, press, and cure to obtain a flame-retardant and fireproof rock wool board. Cut and package the cured product according to the size.

2. The preparation method of the high-strength waterproof rock wool board according to claim 1, characterized in that: In Step 4, it also includes adding 80 - 85 g of phenol, 85 - 90 mL of formaldehyde aqueous solution, and 1 - 3 g of sodium hydroxide into a three-necked flask equipped with an electric stirrer. Heat up, keep the temperature for reaction, then add the above-mentioned yellow powder into the three-necked flask, continue to heat up, start the stirrer, and stir for reaction to obtain a reaction product.

3. The preparation method of the high-strength waterproof rock wool board according to claim 1, characterized in that: In Step 4, it also includes adding 14 - 16 g of liquid paraffin and 20 - 25 g of magnesium ore powder to the above-mentioned reaction product to obtain a mixed material. Add the mixed material into the three-necked flask, heat up, start the stirrer to stir, keep the temperature for reaction, then connect the three-necked flask to a vacuum pump through a rubber tube to evacuate, carry out vacuum distillation for dehydration, continue to keep the temperature for reaction. When the product in the three-necked flask starts to show gel, discharge the material, and obtain a high-temperature resistant phenolic resin after the temperature drops to room temperature.

4. The preparation method of the high-strength waterproof rock wool board according to claim 3, characterized in that: In the fourth step, it also includes putting the high-temperature resistant phenolic resin into a mortar for grinding, screening to obtain resin powder, mixing the resin powder with ethylene glycol to obtain a modified composite adhesive, mixing the prepared rock wool material, gypsum and the modified composite adhesive to obtain a mixed slurry, pouring it into a slurry mixer, rotating and stirring, adding sodium hydroxide solution to the slurry mixer during the stirring process to obtain a preformed slurry, quickly injecting the preformed slurry into a stainless steel mold, then moving the mold into a press for pressing and dewatering, putting the mold into an oven, drying to constant weight, and demolding to obtain a refractory and waterproof rock wool board.

5. The preparation method of the high-strength waterproof rock wool board according to claim 1, characterized in that: The water content of the binder solution is 3wt%-5wt%.

6. The preparation method of the high-strength waterproof rock wool board according to claim 4, characterized in that: During curing, the temperature is 180-200°C.

7. The preparation method of the high-strength waterproof rock wool board according to claim 4, characterized in that: The temperature of the high temperature generated by the atomized petroleum combustion is 1300-1500°C, and the centrifugal speed is 4000-5000 r / min.

8. The preparation method of the high-strength waterproof rock wool board according to claim 4, characterized in that: By adjusting the ratio and curing process, the adhesive can be cured and bonded at room temperature immediately.

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