CN111018479A - Fireproof magnesium core board and manufacturing method thereof - Google Patents
Fireproof magnesium core board and manufacturing method thereof Download PDFInfo
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- CN111018479A CN111018479A CN201911224666.4A CN201911224666A CN111018479A CN 111018479 A CN111018479 A CN 111018479A CN 201911224666 A CN201911224666 A CN 201911224666A CN 111018479 A CN111018479 A CN 111018479A
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- magnesium
- core board
- foaming
- fireproof
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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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a fireproof magnesium core board and a manufacturing method thereof, and belongs to the field of manufacturing of fireproof magnesium core boards. A fire-proof magnesium core plate and a manufacturing method thereof increase the content of active MgO in a caustic dolomite magnesium cementing material and improve the strength of the caustic dolomite magnesium cement. The composite magnesia cementing material can be used for producing electromechanical equipment packing box section, roof corrugated tile, light high-strength house internal partition wall section and the like. The dolomite ore is used to produce magnesian cementing material to replace MgCl with the mass fraction of 40-50%2·6H2O, thereby MgCl can be saved2·6H2O transportation miscellaneous expenses, the cost of the magnesium cementing material product is reduced, and the economic benefit of enterprises is improved.
Description
Technical Field
The invention relates to the field of manufacturing of fireproof magnesium core boards, in particular to a fireproof magnesium core board and a manufacturing method thereof.
Background
The fireproof decorative plate is also called as a fireproof plate, has the functions of wear resistance, heat resistance and open fire resistance, can be used as an outer wall, an inner wall decorative material and an indoor ceiling of a newly-built building and an old house renovation, and is particularly suitable for large public buildings with high personnel density and high fireproof performance, such as conference centers, exhibition halls, gymnasiums, theaters and the like.
The existing fireproof magnesium core board and the manufacturing method thereof have large energy consumption and are not environment-friendly.
Disclosure of Invention
The invention aims to solve the problems of high energy consumption and environmental pollution in the prior art, and provides a fireproof magnesium core plate and a manufacturing method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fireproof magnesium core board and a manufacturing method thereof comprise the following steps:
s1, crushing the selected dolomite ore to 60-70mm, adding the crushed dolomite ore into a calcining kiln, calcining for 2-3h, controlling the calcining temperature at 760-780 ℃, wherein the calcined caustic dolomite can be removed from a discharge hole at the lower part of the kiln body, and new ore is added from the upper part, and the slag can be removed from a coarse grain slag hole and a fine grain slag hole periodically;
s2, crushing and grinding the caustic dolomite stones calcined in the S1 by using a jaw crusher and a disc crusher, and screening and grading by using a phi 200 standard vibrating screen machine to obtain the caustic dolomite magnesian cementing material;
s3, calculating the required MgCl according to the dosage of the magnesium cementing material in S2 and the content of the active MgO2The amount of MgCl was determined by conversion2·6H2Preparing a magnesium chloride solution according to the mass of O, and stirring the magnesium cementing material, the sawdust and the magnesium chloride solution in a mortar stirrer to form pure slurry with standard consistency;
s4, preparing brine for aging for later use 10-12h ahead of production time;
s5, cleaning the die, and uniformly coating a layer of release agent;
s6, weighing the foaming agent, adding 100 times of clear water for dilution to prepare foaming liquid, and properly reducing the dilution times when the air temperature is lower;
s7, conveying the metered brine into a stirrer by using an anticorrosive pump, adding a delayed coagulation halogen-resistant agent, starting the stirrer, stirring for 1-2min, adding light calcined powder into the stirrer by using an automatic feeding machine, starting the stirrer, stirring for 3-5min, adding a halogen-resistant reinforcing agent into the stirrer, and uniformly stirring;
s8, starting a foaming machine, foaming the foaming liquid into foam through the foaming machine, adding the foam into a stirrer according to the volume weight requirement of the product, and uniformly mixing the foam with the magnesite slurry to prepare magnesite foaming slurry;
s9, discharging magnesite foaming slurry into a storage hopper, starting a forming machine, bringing a mold into an inlet of a production line by an automatic template adsorption device, then discharging the foaming slurry into the mold, leveling the thickness of the foaming slurry with the mold by the control of an equipment thickness measuring plate, then bringing a product into an automatic rack mounting machine by a gear transmission device, filling the whole support with the product by the lifting of the automatic rack mounting machine, and then rolling and moving the support into a curing room;
s10, demolding after the formed product is cured, and demolding after 8-9 hours at a set temperature;
and S11, correcting the product to be regular after demoulding, and continuously curing in a curing room for 6-8 days to obtain the fireproof magnesium core board.
Preferably, MgO/MgCl in S32The molar mass ratio of (a) to (b) is 5.
Preferably, the mass ratio of the sawdust in the S3 to the magnesium cementing material is 1: 3.
Preferably, the temperature in the curing chamber is constant at 25 ℃ and the humidity is 75%.
Preferably, GX-7# foaming agent is adopted as the foaming agent in S6.
Preferably, the retarding and halogen-resisting agent in the S7 adopts GX-1# retarding and halogen-resisting agent, and the halogen-resisting reinforcing agent adopts GX-4# halogen-resisting reinforcing agent.
Compared with the prior art, the invention provides a fireproof magnesium core board and a manufacturing method thereof, and the fireproof magnesium core board has the following beneficial effects:
1. the important result of the invention is to develop a fireproof magnesium core plate, which has the important significance of increasing the content of active MgO in the caustic dolomite magnesium cementing material and improving the strength of the caustic dolomite magnesium cement. The composite magnesia cementing material can be used for producing electromechanical equipment packing box section, roof corrugated tile, light high-strength house internal partition wall section and the like. The dolomite ore is used to produce magnesian cementing material to replace MgCl with the mass fraction of 40-50%2·6H2O, thereby MgCl can be saved2·6H2O transportation miscellaneous expenses, reduction of the cost of the magnesium cementing material product, improvement of the economic benefits of enterprises and possibility of using abundant dolomite ore resources in China as raw materials for producing the magnesium cementing material in large quantities. The composite magnesian cementing material and the research result of the application thereof have innovation in the research field of magnesian cementing materials, develop a new research and application direction for caustic dolomite magnesian cementing materials, open up a new way for exploiting and utilizing abundant dolomite ore resources in China in a large quantity, and are used as wood substitute packages of electromechanical equipmentThe box material, the light wall material, the roofing material, the interior decoration material and the like can generate great economic and social benefits.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1:
a fireproof magnesium core board and a manufacturing method thereof comprise the following steps:
s1, crushing the selected dolomite ore to 60-70mm, adding the crushed dolomite ore into a calcining kiln, calcining for 2-3h, controlling the calcining temperature at 760-780 ℃, wherein the calcined caustic dolomite can be removed from a discharge hole at the lower part of the kiln body, and new ore is added from the upper part, and the slag can be removed from a coarse grain slag hole and a fine grain slag hole periodically;
s2, crushing and grinding the caustic dolomite stones calcined in the S1 by using a jaw crusher and a disc crusher, and screening and grading by using a phi 200 standard vibrating screen machine to obtain the caustic dolomite magnesian cementing material;
s3, calculating the required MgCl according to the dosage of the magnesium cementing material in S2 and the content of the active MgO2The amount of MgCl was determined by conversion2·6H2Preparing a magnesium chloride solution according to the mass of O, and stirring the magnesium cementing material, the sawdust and the magnesium chloride solution in a mortar stirrer to form pure slurry with standard consistency;
s4, preparing brine for aging for later use 10-12h ahead of production time;
s5, cleaning the die, and uniformly coating a layer of release agent;
s6, weighing the foaming agent, adding 100 times of clear water for dilution to prepare foaming liquid, and properly reducing the dilution times when the air temperature is lower;
s7, conveying the metered brine into a stirrer by using an anticorrosive pump, adding a delayed coagulation halogen-resistant agent, starting the stirrer, stirring for 1-2min, adding light calcined powder into the stirrer by using an automatic feeding machine, starting the stirrer, stirring for 3-5min, adding a halogen-resistant reinforcing agent into the stirrer, and uniformly stirring;
s8, starting a foaming machine, foaming the foaming liquid into foam through the foaming machine, adding the foam into a stirrer according to the volume weight requirement of the product, and uniformly mixing the foam with the magnesite slurry to prepare magnesite foaming slurry;
s9, discharging magnesite foaming slurry into a storage hopper, starting a forming machine, bringing a mold into an inlet of a production line by an automatic template adsorption device, then discharging the foaming slurry into the mold, leveling the thickness of the foaming slurry with the mold by the control of an equipment thickness measuring plate, then bringing a product into an automatic rack mounting machine by a gear transmission device, filling the whole support with the product by the lifting of the automatic rack mounting machine, and then rolling and moving the support into a curing room;
s10, demolding after the formed product is cured, and demolding after 8-9 hours at a set temperature;
and S11, correcting the product to be regular after demoulding, and continuously curing in a curing room for 6-8 days to obtain the fireproof magnesium core board.
Further, preferably, MgO/MgCl is adopted in S32The molar mass ratio of (a) to (b) is 5.
Further, preferably, the mass ratio of the sawdust to the magnesium cementing material in the S3 is 1: 3.
Further, preferably, the temperature in the curing chamber is constant at 25 ℃ and the humidity is 75%.
Further, it is preferable that GX-7# foaming agent is used as the foaming agent in S6.
Further, preferably, the retarding and halogen-resisting agent in S7 is GX-1# retarding and halogen-resisting agent, and the halogen-resisting reinforcing agent is GX-4# halogen-resisting reinforcing agent.
Example 2: based on example 1, but with the difference that:
TABLE 1 neat paste flexural and compressive strength test results
As can be seen from the data in Table 1, the net paste flexural and compressive strengths of the magnesian cement 28d increased with the addition of magnesia to the caustic dolomite magnesian cement. When adding MgCl with the mass fraction of 50-60 percent into the caustic dolomite magnesian cementing material2·6H2The 28d net pulp compressive strength of the composite magnesia cementing material consisting of O is increased by more than 20MPa compared with that of a single caustic dolomite magnesia cementing material, the flexural strength can reach more than 5MPa, the compressive strength can reach more than 60MPa, and the composite magnesia cementing material has enough strength, so that the composite magnesia cementing material can meet the relevant use requirements.
Example 3: based on examples 1 and 2, but with the difference that:
TABLE 2 Strength of saw dust-magnesium concrete of composite magnesium cementing material
As can be seen from the data in Table 2, for the magnesium cement with MgCl from caustic dolomite2·6H2Sawdust magnesium concrete made of composite magnesium cementing material mixed by O in MgCl2·6H2When the adding amount of O is 40-60% (mass fraction), for example, the compression strength value of the B401-B603 test piece reaches or exceeds the requirement of the local standard of the original national material. These data show that it is possible to produce sawdust magnesia concrete for packing boxes instead of wood or house internal partition profiles with composite magnesia cementitious materials, provided that the production process and formulation are appropriate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The fireproof magnesium core board and the manufacturing method thereof are characterized by comprising the following steps:
s1, crushing the selected dolomite ore to 60-70mm, adding the crushed dolomite ore into a calcining kiln, calcining for 2-3h, controlling the calcining temperature at 760-780 ℃, wherein the calcined caustic dolomite can be removed from a discharge hole at the lower part of the kiln body, and new ore is added from the upper part, and the slag can be removed from a coarse grain slag hole and a fine grain slag hole periodically;
s2, crushing and grinding the caustic dolomite stones calcined in the S1 by using a jaw crusher and a disc crusher, and screening and grading by using a phi 200 standard vibrating screen machine to obtain the caustic dolomite magnesian cementing material;
s3, calculating the required MgCl according to the dosage of the magnesium cementing material in S2 and the content of the active MgO2The amount of MgCl was determined by conversion2·6H2Preparing a magnesium chloride solution according to the mass of O, and stirring the magnesium cementing material, the sawdust and the magnesium chloride solution in a mortar stirrer to form pure slurry with standard consistency;
s4, preparing brine for aging for later use 10-12h ahead of production time;
s5, cleaning the die, and uniformly coating a layer of release agent;
s6, weighing the foaming agent, adding 100 times of clear water for dilution to prepare foaming liquid, and properly reducing the dilution times when the air temperature is lower;
s7, conveying the metered brine into a stirrer by using an anticorrosive pump, adding a delayed coagulation halogen-resistant agent, starting the stirrer, stirring for 1-2min, adding light calcined powder into the stirrer by using an automatic feeding machine, starting the stirrer, stirring for 3-5min, adding a halogen-resistant reinforcing agent into the stirrer, and uniformly stirring;
s8, starting a foaming machine, foaming the foaming liquid into foam through the foaming machine, adding the foam into a stirrer according to the volume weight requirement of the product, and uniformly mixing the foam with the magnesite slurry to prepare magnesite foaming slurry;
s9, discharging magnesite foaming slurry into a storage hopper, starting a forming machine, bringing a mold into an inlet of a production line by an automatic template adsorption device, then discharging the foaming slurry into the mold, leveling the thickness of the foaming slurry with the mold by the control of an equipment thickness measuring plate, then bringing a product into an automatic rack mounting machine by a gear transmission device, filling the whole support with the product by the lifting of the automatic rack mounting machine, and then rolling and moving the support into a curing room;
s10, demolding after the formed product is cured, and demolding after 8-9 hours at a set temperature;
and S11, correcting the product to be regular after demoulding, and continuously curing in a curing room for 6-8 days to obtain the fireproof magnesium core board.
2. The fireproof magnesium core board and the manufacturing method thereof according to claim 1, wherein the fireproof magnesium core board comprises: MgO/MgCl in S32The molar mass ratio of (a) to (b) is 5.
3. The fireproof magnesium core board and the manufacturing method thereof according to claim 1, wherein the fireproof magnesium core board comprises: the mass ratio of the sawdust in the S3 to the magnesium cementing material is 1: 3.
4. The fireproof magnesium core board and the manufacturing method thereof according to claim 2, wherein the fireproof magnesium core board comprises: the temperature in the curing chamber is constant at 25 ℃ and the humidity is 75%.
5. The fireproof magnesium core board and the manufacturing method thereof according to claim 2, wherein the fireproof magnesium core board comprises: the foaming agent in the S6 adopts GX-7# foaming agent.
6. The fireproof magnesium core board and the manufacturing method thereof according to claim 5, wherein the fireproof magnesium core board comprises: the retarding and halogen-resisting agent in the S7 adopts GX-1# retarding and halogen-resisting agent, and the halogen-resisting reinforcing agent adopts GX-4# halogen-resisting reinforcing agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911224666.4A CN111018479A (en) | 2019-12-04 | 2019-12-04 | Fireproof magnesium core board and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911224666.4A CN111018479A (en) | 2019-12-04 | 2019-12-04 | Fireproof magnesium core board and manufacturing method thereof |
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| CN111018479A true CN111018479A (en) | 2020-04-17 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137027A (en) * | 1995-05-29 | 1996-12-04 | 桂林工学院 | Compound magnesium gelatinous material and making method and use thereof |
| KR20030036382A (en) * | 2003-03-21 | 2003-05-09 | 안성호 | Cement terazo composite materials using the magnesia |
| CN102040365A (en) * | 2010-11-03 | 2011-05-04 | 中国科学院青海盐湖研究所 | Light dolomite magnesium cement partition plate and manufacturing method thereof |
| CN102060501A (en) * | 2010-11-03 | 2011-05-18 | 中国科学院青海盐湖研究所 | Dolomite magnesium cement inner and outer wall fireproof decoration board and preparation method thereof |
| CN102643064A (en) * | 2012-04-16 | 2012-08-22 | 湟源科美新型材料有限公司 | Energy-saving fireproof insulation board and manufacturing method thereof |
| CN102775123A (en) * | 2012-04-13 | 2012-11-14 | 杨永 | Fireproof door core plate |
| CN105347840A (en) * | 2015-12-03 | 2016-02-24 | 中国科学院青海盐湖研究所 | Economic wall foamed block material and preparation method thereof |
-
2019
- 2019-12-04 CN CN201911224666.4A patent/CN111018479A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137027A (en) * | 1995-05-29 | 1996-12-04 | 桂林工学院 | Compound magnesium gelatinous material and making method and use thereof |
| KR20030036382A (en) * | 2003-03-21 | 2003-05-09 | 안성호 | Cement terazo composite materials using the magnesia |
| CN102040365A (en) * | 2010-11-03 | 2011-05-04 | 中国科学院青海盐湖研究所 | Light dolomite magnesium cement partition plate and manufacturing method thereof |
| CN102060501A (en) * | 2010-11-03 | 2011-05-18 | 中国科学院青海盐湖研究所 | Dolomite magnesium cement inner and outer wall fireproof decoration board and preparation method thereof |
| CN102775123A (en) * | 2012-04-13 | 2012-11-14 | 杨永 | Fireproof door core plate |
| CN102643064A (en) * | 2012-04-16 | 2012-08-22 | 湟源科美新型材料有限公司 | Energy-saving fireproof insulation board and manufacturing method thereof |
| CN105347840A (en) * | 2015-12-03 | 2016-02-24 | 中国科学院青海盐湖研究所 | Economic wall foamed block material and preparation method thereof |
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Application publication date: 20200417 |
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