CN111393129A - Glass magnesium core material slurry, glass magnesium core material manufacturing method and application - Google Patents
Glass magnesium core material slurry, glass magnesium core material manufacturing method and application Download PDFInfo
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- CN111393129A CN111393129A CN202010218942.2A CN202010218942A CN111393129A CN 111393129 A CN111393129 A CN 111393129A CN 202010218942 A CN202010218942 A CN 202010218942A CN 111393129 A CN111393129 A CN 111393129A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/12—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material
- B28B3/123—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material on material in moulds or on moulding surfaces moving continuously underneath or between the rollers, e.g. on an endless belt
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0037—Materials containing oriented fillers or elements
- C04B2111/00379—Materials containing oriented fillers or elements the oriented elements being fibres
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a glass magnesium core material slurry, a manufacturing method and application of a glass magnesium core material, and relates to the field of heat insulation boards. The glass magnesium core material slurry is formed by processing magnesium chloride hexahydrate (or anhydrous magnesium chloride), a magnesium-containing compound, a toughening material, a foaming agent, non-woven fabrics and glass fiber cloth serving as raw materials. The ratio of the weight of chlorine in the magnesium chloride to the weight of magnesium in the magnesium-containing compound is 0.36-0.39, the magnesium-containing compound is magnesium oxide or magnesium sulfate, in the invention, the glass magnesium core material with better quality can be prepared without adding any modifier, and the produced glass magnesium board has better fireproof and flame-retardant properties, so that the manufacturing cost can be greatly reduced, and the manufacturing difficulty can be reduced.
Description
Technical Field
The invention relates to the field of heat insulation boards, in particular to glass magnesium core material slurry, a manufacturing method of a glass magnesium core material and application of the glass magnesium core material slurry.
Background
The heat insulation plate is a decorative plate with fireproof and flame-retardant properties, and is widely applied to the field of buildings. Among the insulation panels, a common sheet material is a magnesium oxide sheet. The glass magnesium board is light, non-toxic, tasteless and pollution-free, has good high temperature resistance and flame retardant properties, can be matched with various heat insulation materials to form a heat insulation board, and is widely applied.
The general glass magnesium board is formed by sticking glass magnesium core materials. The glass magnesium core material is a magnesium gelled material with stable performance, which is prepared by a ternary system of magnesium oxide, magnesium chloride (or magnesium sulfate) and water through configuration and addition of a modifier. Among them, magnesium chloride (or magnesium sulfate) can improve the high temperature resistance of the magnesium oxide core material. Because the glass magnesium core material contains chloride ions, when the humidity of the outside air is high, the surface of the glass magnesium core material can absorb the moisture in the air, so that the surface of the glass magnesium core material is wet and full of water drops, and the phenomenon of bittern return is caused. In order to solve the problem, a glass magnesium core material is modified by adding a reinforcing modifier or a tackifying modifier so as to prevent the glass magnesium core material from halogen return.
For example, document No. CN106082929A provides a glass-magnesium core material, which is formed by mixing a base material (including magnesium oxide and magnesium chloride solution), a modifier, fly ash or calcined kaolin, silica fume, perlite, sawdust, a reinforcing material, medium flour and 10% AC foaming liquid, and has good mechanical properties. Wherein the modifier can prevent the magnesium oxide core material from generating the phenomenon of halogen return.
However, in the process of preparing the glass magnesium core material, because the addition amount of the modifier is small, once the molar ratio of the modifier which is carelessly added in the operation is slightly different in the actual operation process, the glass magnesium core material is easy to harden in advance before forming to cause scrap, so that the cost is increased, and the production is not facilitated.
Disclosure of Invention
In view of the defects in the prior art, the first object of the present invention is to provide a glass magnesium core material slurry, which has the advantages of low cost and no occurrence of halogen return phenomenon of the produced glass magnesium core material.
The second purpose of the invention is to provide a method for manufacturing a glass-magnesium core material, which is used for preparing the glass-magnesium core material prepared from the glass-magnesium core material slurry.
The third purpose of the invention is to provide a glass magnesium board which has the advantages of low cost and good flame retardant property.
In order to achieve the first object, the invention provides the following technical scheme: the glass magnesium core material slurry consists of the following raw materials in percentage by weight:
magnesium chloride hexahydrate or magnesium chloride, wherein the weight of chlorine element accounts for 7-10% of the total weight of the glass magnesium core material slurry;
a magnesium-containing compound, wherein the weight ratio of chlorine element in magnesium chloride to magnesium element in the magnesium-containing compound is 0.36-0.39, and the magnesium-containing compound is magnesium oxide or magnesium sulfate;
5.8 to 9.2 percent of toughening material;
0.5 to 1.3 percent of foaming agent;
0-19% of glass magnesium board crushed powder;
0-16% of filler;
the balance of water;
the total content of the above substances is 100%.
By adopting the technical scheme, the magnesium-containing compound, the magnesium chloride and the water are matched to form the ternary system magnesium gel material, the magnesium element in the magnesium-containing compound can provide the flame retardance of the glass magnesium core material, and the toughening material can enhance the toughness and the fracture resistance of the glass magnesium core material and prevent the glass magnesium core material from being easily broken due to over brittleness. The foaming agent can be foamed when the slurry is prepared, so that bubbles are arranged in the slurry, and the prepared glass magnesium core material is lighter. The non-woven fabric and the glass fiber cloth are reinforcing materials, so that the strength of the glass magnesium core material can be improved, and the glass magnesium board crushing powder is obtained by crushing leftover materials generated by cutting during the production of the glass magnesium core material, so that industrial waste in the production process can be greatly reduced, waste is turned into wealth, the density of the glass magnesium core material can be increased, and the strength of the glass magnesium core material can be improved. In a common glass magnesium core material, a tackifying modifier or a reinforcing modifier is generally required to be added to prevent the glass magnesium core material from halogen-free shrinkage, but in the production process, the tackifying modifier or the reinforcing modifier increases the cost, and in the actual operation process, the prepared glass magnesium core material becomes brittle due to slight deviation of the ratio of the tackifying modifier or the reinforcing modifier, the quality of the glass magnesium core material is seriously affected, and waste materials are easily generated. In the technical scheme, no modifier is added, and when the weight ratio of chlorine in magnesium chloride hexahydrate (or anhydrous magnesium chloride) to magnesium in a magnesium-containing compound is adjusted to be 0.36-0.39, the concentration of chlorine ions in the prepared glass magnesium core material is low, so that the glass magnesium core material does not have the phenomenon of anti-halogen shrinkage, the cost is greatly reduced, and the problem that the glass magnesium core material becomes brittle due to improper addition proportion of the modifier is avoided. And experimental data show that the technical scheme has better breaking strength, impact strength, heat conductivity and flame retardant effect. The quality of the glass magnesium core material prepared from the raw materials is good.
By adopting the technical scheme, further, the toughening material is one or a composition of more of sawdust, bamboo fiber, rice hull powder or perlite.
By adopting the technical scheme, the sawdust, the bamboo fiber, the rice husk powder or the perlite can be well bonded with the slurry, and the added sawdust, the bamboo fiber, the rice husk powder or the perlite can improve the toughness of the slurry and prevent the quality of the glass-magnesium core material from being deteriorated due to over brittleness.
Further, the sawdust is 5 cm to 12 cm.
Further, when the temperature is 25-40 ℃ and the relative humidity is more than 60%, the weight percentage range of the filler is 13-16%;
the filler is one or a composition of more of limestone powder, industrial calcium saccharate or coal ash powder.
By adopting the technical scheme, when the temperature is 25-40 ℃ and the relative humidity is more than 60%, when the glass magnesium core material is produced, because the temperature is higher and the humidity is higher, the reaction rate of the magnesium chloride solution and the magnesium-containing compound is higher, and the slurry is very easy to dry to become waste when the slurry is not formed or cannot be poured into a mould, in order to solve the problem, the filler can be added, because the raw stone powder, the industrial calcium or the coal ash powder contains calcium ions, the calcium ions can solidify the chloride ions in the magnesium chloride, the reaction time of the magnesium chloride solution and the magnesium oxide is prolonged, and the waste formation caused by the water-deficient solidification of the slurry before the preparation result is effectively prevented.
Further, the mesh number of the stone powder is 150 meshes.
The stone powder with the mesh number of 150 can be better dispersed in the slurry, the reaction rate is uniformly slowed down, and the phenomenon that the local reaction rate is too high due to nonuniform mixing is reduced.
Further, the foaming agent is a magnesite foaming agent.
By adopting the technical scheme, the magnesite foaming agent is selected as the foaming agent, the gas released by the magnesite foaming agent is non-toxic and non-combustible, the speed of the gas released by the magnesite foaming agent can be controlled, and the magnesite foaming agent is uniformly dispersed and can be well dispersed in the glass magnesium core material, so that the prepared glass magnesium core material is uniform and light.
In order to achieve the second object, the invention provides the following technical scheme: a preparation method of a glass-magnesium core material is used for preparing the glass-magnesium core material and comprises the following steps:
s1: preparing a magnesium chloride solution;
s2: putting magnesium oxide (or magnesium sulfate) into a stirrer, adding a magnesium chloride solution, and stirring to form a mixture;
s3: adding a toughening material and a foaming agent into the mixture, and stirring for 3-5 minutes to obtain slurry;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabrics, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for forming, wherein the forming temperature in the forming machine is 35-45 ℃, and the pressure is 12-15 MPa;
s5: demoulding, maintaining and airing, and then cutting into the required size according to the size.
By adopting the technical scheme, the magnesium chloride solution is prepared to obtain brine, then the magnesium oxide (or magnesium sulfate) is put into a stirrer to be stirred to form a uniform magnesium gel material, and then the wood toughening material and the foaming agent are added to increase the toughness. The slurry is obtained by uniformly stirring, the stirring is not uniform enough when the stirring time is too short, and the glass magnesium core material is too fast to be formed and easily scrapped when the stirring time is too long. After the slurry is formed, the slurry is poured onto a mold paved with non-woven fabrics, and glass fiber cloth is paved above the slurry, so that the glass magnesium core material is molded together with the non-woven fabrics and the glass fiber cloth during molding, and the strength of the glass magnesium core material is enhanced. And finally, demoulding the cured glass magnesium core material, naturally curing and airing to evaporate water in the glass magnesium core material, and finally cutting the glass magnesium core material into required sizes according to the size to obtain the glass magnesium core material. In the glass magnesium core material in the prior art, because the modifier is added, the temperature and humidity are controlled in the maintenance process, and the glass magnesium core material can be maintained in a greenhouse, and if the greenhouse is not used for maintenance and natural maintenance is adopted, the evaporation degree of water in the glass magnesium core material can be influenced, so that the glass magnesium core material is not uniform enough in the interior and poor in quality. In the technical scheme, the glass magnesium core material is placed in an indoor natural ventilation position in the maintenance process, and is not required to be placed in a temperature and humidity control greenhouse for maintenance, so that the cost is low.
Further, in the step S1, magnesium chloride hexahydrate (or anhydrous magnesium chloride) is dissolved in water, and the mixture is uniformly stirred to form a magnesium chloride solution for later use.
Further, between the S2 and the S3, a step S2a is further included;
s2 a: and adding the filler into the mixture, and uniformly stirring.
By adopting the technical scheme, when the temperature is 25-40 ℃ and the relative humidity is more than 60%, the reaction rate of the magnesium chloride solution and magnesium oxide (or magnesium sulfate) is high due to high temperature, so that the slurry is easily dried too fast, and the filler contains calcium ions which can be combined with chloride ions to control the reaction rate. The success rate of the glass magnesium core material is improved. Then adding the toughening material, so that the toughening material can be better mixed with the slurry.
Further, between S2 and S3, the method further includes step S2 b:
s2 b: adding the magnesium oxide board crushed powder into the mixture.
By adopting the technical scheme, the magnesium oxide board crushed powder can be added into the mixture and stirred so as to improve the strength of the magnesium oxide core material, improve the mechanical property of the magnesium oxide core material and reduce the generation of industrial waste solids.
Further, in the S3, the specific gravity of the slurry is controlled to be 950-1000 g/1000L.
By adopting the technical scheme, when the specific gravity of the slurry is controlled to be 950-1000 g/1000L, the reaction rate in the slurry is not too fast, and the slurry can be stirred more uniformly, if the specific gravity is too large, the stirring is difficult, and if the specific gravity is too small, the reaction rate is too slow.
Further, in the step S5, the curing is natural curing, and the curing time is 6-8 days.
By adopting the technical scheme, after natural curing is carried out for 6-8 days, the moisture in the glass magnesium core material can be evaporated out, and the occurrence of the phenomenon of returning halogen in the use process is reduced.
Further, in the S5, when the temperature is 25-40 ℃, the natural curing time is 6-7 days, and when the temperature is 0-25 ℃, the natural curing time is 7-8 days.
By adopting the technical scheme, when the temperature is higher, the moisture in the glass magnesium core material is easier to evaporate, so the required time is shorter, and when the temperature is lower, the moisture in the glass magnesium core material is not easy to evaporate, so the required time is longer.
In order to achieve the third object, the invention provides the following technical solutions: a glass magnesium board is made of the glass magnesium core material.
By adopting the technical scheme, the glass magnesium board is prepared by utilizing the glass magnesium core material, and has good mechanical property and good flame retardant property.
Further, the manufacturing method of the glass magnesium board comprises the following steps: and bonding and compounding the prepared glass magnesium core material with the keel by using glue to form the glass magnesium board.
In conclusion, the invention has the following beneficial effects:
firstly, as the weight ratio of the chlorine element in the magnesium chloride hexahydrate (or anhydrous magnesium chloride) to the magnesium element in the magnesium-containing compound is adjusted to be 0.36-0.39, the glass magnesium core material can have better flame retardant property without adding a modifier and no halogen return shrinkage phenomenon. And because the use amount of magnesium chloride and magnesium oxide is large, certain errors in the production process can not influence the quality of the magnesium oxide core material, the cost is greatly reduced, and the success rate is improved.
Secondly, when the glass magnesium core material is maintained, the glass magnesium core material does not need to be placed in a temperature and humidity control shed and is placed in an indoor natural ventilation position, and the production cost is greatly reduced.
Thirdly, the glass magnesium board adopts the glass magnesium core material, and has the advantages of good mechanical property, environmental protection, good water resistance, low heat conductivity coefficient, high heat preservation and insulation performance, high fire resistance grade and light weight.
Detailed Description
The present invention will be described in further detail with reference to examples.
Magnesium chloride hexahydrate, anhydrous magnesium chloride, magnesium oxide, magnesium sulfate, sawdust, bamboo fibers, rice husk powder, perlite, raw stone powder, industrial calcium saccharate, coal ash powder, a magnesite foaming agent, non-woven fabric and glass fiber fabric are all commercially available products.
Wherein, the magnesium chloride hexahydrate is selected from magnesium chloride hexahydrate (the content of 46 percent) produced by Shandong Weifang Dongyuan sea environmental protection science and technology limited;
the magnesium oxide is selected from magnesium oxide (85 powder) produced by Liaoning Jinsha mining Co Ltd;
the stone powder is produced by Yunfuijiayuan powder company Limited (150 mesh first-grade powder);
the sawdust is common commercially available sawdust (5-12 cm)
Example 1
A glass magnesium board is prepared as follows:
(ambient temperature 15 ℃ C., relative humidity 40%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 121 parts of magnesium oxide (the weight ratio of chlorine element in magnesium chloride to magnesium element in magnesium-containing compound is 0.38) into a stirrer, adding 122 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s3, adding 25 parts of sawdust and 3 parts of magnesite foaming agent into the mixture, stirring for 5 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 40 ℃, and the pressure is 15 MPa;
s5: demoulding, natural curing for 7 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 2
A glass magnesium board is prepared as follows:
(ambient temperature 10 ℃ C., relative humidity 35%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 123 parts of magnesium oxide (the weight ratio of chlorine element in magnesium chloride to magnesium element in magnesium-containing compound is 0.38) into a stirrer, adding 124 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 45 parts of raw stone powder into the mixture and uniformly stirring;
s3, adding 20 parts of sawdust, 5 parts of perlite and 3 parts of magnesite foaming agent into the mixture, stirring for 5 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 40 ℃, and the pressure is 13 MPa;
s5: demoulding, natural curing for 8 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 3
A glass magnesium board is prepared as follows:
(ambient temperature 20 ℃ C., relative humidity 50%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 122 parts of magnesium oxide (the weight ratio of chlorine element in magnesium chloride to magnesium element in magnesium-containing compound is 0.39) into a stirrer, adding 125 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 b: and adding 65 parts of the magnesium oxide board crushed powder into the mixture, and uniformly stirring.
S3, adding 23 parts of sawdust and 3 parts of magnesite foaming agent into the mixture, stirring for 3 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 42 ℃, and the pressure is 13 MPa;
s5: demoulding, natural curing for 7 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 4
A glass magnesium board is prepared as follows:
(ambient temperature 15 ℃ C., relative humidity 40%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 120 parts of magnesium oxide (the weight ratio of chlorine element in magnesium chloride to magnesium element in magnesium-containing compound is 0.39) into a stirrer, adding 123 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 50 parts of raw stone powder into the mixture and uniformly stirring;
s2 b: adding 55 parts of magnesium oxide board crushed powder into the mixture and uniformly stirring;
s3, adding 15 parts of sawdust, 10 parts of rice hull powder and 4 parts of magnesite foaming agent into the mixture, stirring for 4 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 35 ℃, and the pressure is 12 MPa;
s5: demoulding, natural curing for 8 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 5
A glass magnesium board is prepared as follows:
(ambient temperature 25 ℃ C., relative humidity 80%)
S1: preparing a magnesium chloride solution, dissolving anhydrous magnesium chloride in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 123 parts of magnesium oxide (the weight ratio of chlorine element in magnesium chloride to magnesium element in magnesium-containing compound is 0.38) into a stirrer, adding 124 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 50 parts of raw stone powder into the mixture and uniformly stirring;
s3, adding 20 parts of sawdust and 2 parts of magnesite foaming agent into the mixture, stirring for 3 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 42 ℃, and the pressure is 15 MPa;
s5: demoulding, natural curing for 7 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 6
A glass magnesium board is prepared as follows:
(ambient temperature 35 ℃ C., relative humidity 85%)
S1: preparing a magnesium chloride solution, dissolving anhydrous magnesium chloride in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 125 parts of magnesium oxide (the weight ratio of chlorine element in magnesium chloride to magnesium element in magnesium-containing compound is 0.36) into a stirrer, adding 120 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 30 parts of raw stone powder and 20 parts of coal ash powder into the mixture and uniformly stirring;
s3, adding 10 parts of sawdust, 5 parts of rice hull powder, 5 parts of perlite and 4 parts of magnesite foaming agent into the mixture, stirring for 3 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 40 ℃, and the pressure is 14 MPa;
s5: demoulding, natural curing for 7 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 7
A glass magnesium board is prepared as follows:
(ambient temperature 40 ℃ C., relative humidity 95%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: 125 parts of magnesium oxide (the weight ratio of chlorine element in the magnesium chloride to magnesium element in the magnesium-containing compound is 0.38) is put into a stirrer, 126 parts of the magnesium chloride solution prepared in the step S1 are added into the stirrer, and the mixture is stirred to form a mixture;
s2 a: adding 30 parts of raw stone powder and 20 parts of industrial calcium saccharate into the mixture and uniformly stirring;
s2 b: and adding 65 parts of the magnesium oxide board crushed powder into the mixture, and uniformly stirring.
S3, adding 15 parts of sawdust, 10 parts of bamboo fiber and 5 parts of magnesite foaming agent into the mixture, stirring for 4 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 35 ℃, and the pressure is 12 MPa;
s5: demoulding, natural curing for 6 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 8
A glass magnesium board is prepared as follows:
(ambient temperature 35 ℃ C., relative humidity 85%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 120 parts of magnesium oxide (the weight ratio of chlorine element in magnesium chloride to magnesium element in magnesium-containing compound is 0.39) into a stirrer, adding 123 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 50 parts of raw stone powder into the mixture and uniformly stirring;
s2 b: and adding 60 parts of magnesium oxide board crushed powder into the mixture, and uniformly stirring.
S3, adding 22 parts of sawdust and 2 parts of magnesite foaming agent into the mixture, stirring for 5 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 40 ℃, and the pressure is 15 MPa;
s5: demoulding, maintaining at constant temperature in a greenhouse with constant temperature of 35 ℃ for 6 days, and cutting into required size according to size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Example 9
A glass magnesium board is prepared as follows:
(ambient temperature 35 ℃ C., relative humidity 85%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 120 parts of magnesium oxide (the weight ratio of chlorine element in the magnesium chloride solution to magnesium element in the magnesium-containing compound is 0.39) into a stirrer, adding 123 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 50 parts of raw stone powder into the mixture and uniformly stirring;
s2 b: and adding 60 parts of magnesium oxide board crushed powder into the mixture, and uniformly stirring.
S3, adding 22 parts of sawdust and 2 parts of magnesite foaming agent into the mixture, stirring for 5 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 40 ℃, and the pressure is 15 MPa;
s5: demoulding, natural curing for 6 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Comparative example 1
(ambient temperature 20 ℃ C., relative humidity 40%)
The obtained magnesium oxide board was prepared by the method described in patent No. CN 106082929A. The raw materials comprise 125 parts of magnesium chloride solution, 100 parts of magnesium oxide, 1 part of magnesium oxychloride modifier (water aqua), 11 parts of fly ash, 6 parts of silica fume, 2.7 parts of perlite, 12.7 parts of sawdust, 3 parts of medium gluten flour, 4 parts of 10% concentration AC foaming solution and 8 parts of hemp. During curing, the temperature is kept at 35 ℃ for 6 days.
Comparative example 2
(ambient temperature 35 ℃ C., relative humidity 85%)
The obtained magnesium oxide board was prepared by the method described in patent No. CN 106082929A. The raw materials comprise 125 parts of magnesium chloride solution, 100 parts of magnesium oxide, 1 part of magnesium oxychloride modifier (water aqua), 11 parts of fly ash, 6 parts of silica fume, 2.7 parts of perlite, 12.7 parts of sawdust, 3 parts of medium gluten flour, 4 parts of 10% concentration AC foaming solution and 8 parts of hemp. During curing, the temperature is kept at 35 ℃ for 6 days.
Comparative example 3
(ambient temperature 20 ℃ C., relative humidity 40%)
The obtained magnesium oxide board was prepared by the method described in patent No. CN 106082929A. The raw materials comprise 125 parts of magnesium chloride solution, 100 parts of magnesium oxide, 11 parts of fly ash, 6 parts of silica fume, 2.7 parts of perlite, 12.7 parts of sawdust, 3 parts of medium gluten flour, 4 parts of 10% AC foaming solution and 8 parts of hemp. During curing, the temperature is kept at 35 ℃ for 6 days.
Comparative example 4
(ambient temperature 35 ℃ C., relative humidity 85%)
The obtained magnesium oxide board was prepared by the method described in patent No. CN 106082929A. The raw materials comprise 125 parts of magnesium chloride solution, 100 parts of magnesium oxide, 1 part of magnesium oxychloride modifier (water aqua), 11 parts of fly ash, 6 parts of silica fume, 2.7 parts of perlite, 12.7 parts of sawdust, 3 parts of medium gluten flour, 4 parts of 10% concentration AC foaming solution and 8 parts of hemp. During maintenance, the product is maintained for 7 days in an indoor natural ventilation state.
Comparative example 5
A glass magnesium board is prepared as follows:
(ambient temperature 35 ℃ C., relative humidity 85%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 146 parts of magnesium oxide (the weight ratio of chlorine element in the magnesium chloride solution to magnesium element in the magnesium-containing compound is 0.45) into a stirrer, adding 123 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 50 parts of raw stone powder into the mixture and uniformly stirring;
s2 b: and adding 60 parts of magnesium oxide board crushed powder into the mixture, and uniformly stirring.
S3, adding 22 parts of sawdust and 2 parts of magnesite foaming agent into the mixture, stirring for 5 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 40 ℃, and the pressure is 15 MPa;
s5: demoulding, natural curing for 6 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Comparative example 6
A glass magnesium board is prepared as follows:
(ambient temperature 35 ℃ C., relative humidity 85%)
S1: preparing a magnesium chloride solution, dissolving magnesium chloride hexahydrate in water, and uniformly stirring to form a magnesium chloride solution for later use, wherein the molar ratio of the magnesium chloride solution is 26.
S2: putting 102.5 parts of magnesium oxide (the weight ratio of chlorine element in the magnesium chloride solution to magnesium element in the magnesium-containing compound is 0.31) into a stirrer, adding 123 parts of the magnesium chloride solution prepared in the step S1 into the stirrer, and stirring to form a mixture;
s2 a: adding 50 parts of raw stone powder into the mixture and uniformly stirring;
s2 b: and adding 60 parts of magnesium oxide board crushed powder into the mixture, and uniformly stirring.
S3, adding 22 parts of sawdust and 2 parts of magnesite foaming agent into the mixture, stirring for 5 minutes to prepare slurry, and controlling the specific gravity of the slurry within the range of 950-1000 g/1000L in the stirring process;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabric, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for roll forming, wherein the forming temperature in the forming machine is 40 ℃, and the pressure is 15 MPa;
s5: demoulding, natural curing for 6 days, air drying, and cutting into required size.
S6: and (5) bonding and compounding the glass magnesium core material prepared in the step (S5) with the keel by using glue to form the glass magnesium board.
Performance test
Detection method
The breaking strength, impact strength, halogen return resistance and drying shrinkage of examples 1-9 and comparative examples 1-6 are detected according to detection standard JC 688-2006;
detecting the flame retardant grades of the detection examples 1-9 and the comparative examples 1-6 according to a detection standard GB 8624-2006;
the thermal conductivity coefficients of examples 1 to 9 and comparative examples 1 to 6 were measured according to the test standard GB/T0599-2006;
according to the detection standard CECS 95: the water permeability resistance of examples 1 to 9 and comparative examples 1 to 6 was examined at 97.
The above test data are shown in table 1.
TABLE 1
As can be seen from table 1, in examples 1 to 4, the magnesium oxide boards prepared in the manner of example 4 have good mechanical properties, flame retardancy and fire resistance, and no halogen-back shrinkage phenomenon. In examples 5 to 9, the magnesium oxide boards prepared in the manner of example 9 have good mechanical properties, flame retardancy and fire resistance at a temperature of 25 to 40 ℃, and have no halogen-shrinkage phenomenon. In contrast to example 8 and example 9, the magnesium oxide board in the present embodiment is cured under the conditions of constant temperature curing or natural curing, and the quality of the magnesium oxide board is not greatly affected.
As can be seen from Table 1, the mechanical properties of examples 1-9 are comparable to those of comparative example 1, but the cost is lower and the production is facilitated because no modifier is added in examples 1-9. In addition, in the comparative example 1, the silica fume is used as the filler, the hemp thread is used as the toughening material, and the medium gluten flour is used, so that the influence on whether the glass magnesium board has the phenomenon of halogen returning is avoided.
As can be seen from table 1, in examples 5 to 9, when the temperature is higher and the humidity is higher than in comparative example 2, when the modifier in the same ratio as in comparative example 1 is used to prepare the magnesium oxide board in comparative example 2, the content of the modifier is not changed, but the mechanical properties of the prepared magnesium oxide board are deteriorated and the magnesium oxide board has a phenomenon of halogen back. The influence of temperature and humidity on the magnesium oxide board added with the modifier is large, so that the quality of the magnesium oxide board is easily deteriorated due to the change of the temperature and the humidity during the actual production process by adding the modifier, and the operation is difficult.
As can be seen from table 1, in comparison with comparative example 3, in the magnesium oxide boards of examples 1 to 9, the mechanical properties of the magnesium oxide boards in the prior art are poor, and the magnesium oxide boards have halogen reversion phenomenon and higher dry shrinkage rate after no modifier is added during the processing.
As can be seen from table 1, in examples 1 to 9, compared to comparative example 4, the magnesium oxide board added with the modifier needs to be cured under severer conditions, and when the temperature and humidity during curing are changed, the evaporation degree of water in the magnesium oxide board is affected, so that the inside of the magnesium oxide board is not uniform enough, and the quality of the magnesium oxide board is poor.
As can be seen from table 1, in examples 1 to 9, compared to comparative example 5, the ratio of magnesium oxide to magnesium chloride is increased too much, which tends to result in too low a chloride ion concentration, and too low a chloride ion concentration tends to result in a decrease in the moisture resistance of the magnesium oxide panel, which affects the water resistance of the magnesium oxide panel.
As can be seen from table 1, in examples 1 to 9, compared to comparative example 6, the ratio of magnesium oxide to magnesium chloride is reduced too much, which easily results in too high a chloride ion concentration, which easily causes the magnesium oxide board to generate a halogen returning phenomenon, and also causes the mechanical properties to be reduced.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The glass magnesium core material slurry is characterized by comprising the following raw materials in percentage by weight:
magnesium chloride hexahydrate or anhydrous magnesium chloride, wherein the weight of chlorine element accounts for 7-10% of the total weight of the glass magnesium core material slurry;
a magnesium-containing compound, wherein the weight ratio of chlorine element in magnesium chloride to magnesium element in the magnesium-containing compound is 0.36-0.39, and the magnesium-containing compound is magnesium oxide or magnesium sulfate;
5.8 to 9.2 percent of toughening material;
0.5 to 1.3 percent of foaming agent;
0-19% of glass magnesium board crushed powder;
0-16% of filler;
the balance of water;
the total content of the above substances is 100%.
2. The glass-magnesium core material slurry according to claim 1, wherein the toughening material is one or a combination of more of sawdust, bamboo fiber, rice husk powder and perlite.
3. A magnesium oxide core material slurry according to claim 1, wherein when the temperature is 25-40 ℃ and the relative humidity is more than 60%, the weight percentage of the filler is in the range of 13-16%;
the filler is one or a composition of more of limestone powder, industrial calcium saccharate or coal ash powder.
4. The magnesium core material slurry according to claim 1, wherein the foaming agent is a magnesite foaming agent.
5. A method for preparing a glass-magnesium core material, which is used for preparing the glass-magnesium core material as claimed in claims 1-4, and is characterized by comprising the following steps:
s1: preparing a magnesium chloride solution;
s2: putting magnesium oxide (or magnesium sulfate) into a stirrer, adding a magnesium chloride solution, and stirring to form a mixture;
s3: adding a toughening material and a foaming agent into the mixture, and stirring for 3-5 minutes to obtain the glass magnesium core material slurry;
s4: pouring the slurry prepared in the step S3 onto a mold paved with non-woven fabrics, paving glass fiber cloth above the slurry, and feeding the slurry into a forming machine for forming, wherein the forming temperature in the forming machine is 35-45 ℃, and the pressure is 12-15 MPa;
s5: demoulding, maintaining and airing, and then cutting into the required size according to the size.
6. The method for preparing a glass-magnesium core material as claimed in claim 5, further comprising steps S2a between S2 and S3;
s2 a: and adding the filler into the mixture, and uniformly stirring.
7. The method for preparing a glass-magnesium core material as claimed in claim 5, further comprising steps S2b between S2 and S3;
s2 b: adding the magnesium oxide board crushed powder into the mixture.
8. The method for preparing a glass-magnesium core material as claimed in claim 5, wherein in the S3, the specific gravity of the slurry is controlled to be 950-1000 g/1000L.
9. The method of claim 5, wherein in S5, curing in S5 is natural curing, and curing time is 6-8 days.
10. A magnesium board made of the magnesium core material according to claims 1 to 9.
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Cited By (1)
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| CN113651589A (en) * | 2021-08-26 | 2021-11-16 | 惠州市华瑞康实业有限公司 | Manufacturing method of glass magnesium plate |
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