CN105777044A - Preparing method for calcium silicate board - Google Patents
Preparing method for calcium silicate board Download PDFInfo
- Publication number
- CN105777044A CN105777044A CN201610240106.8A CN201610240106A CN105777044A CN 105777044 A CN105777044 A CN 105777044A CN 201610240106 A CN201610240106 A CN 201610240106A CN 105777044 A CN105777044 A CN 105777044A
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- CN
- China
- Prior art keywords
- calcium silicate
- reaction
- silicate board
- reaction vessel
- quartz sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C04B28/18—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 mixtures of the silica-lime type
- C04B28/186—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
- C04B28/188—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step the Ca-silicates being present in the starting mixture
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
Abstract
The invention discloses a preparing method for a calcium silicate board, and belongs to the technical field of preparing calcium silicate boards. The preparing method includes the steps that quartz sand is weighed, ground and screened to obtain powder, hydrofluoric acid is added for reaction to generate silicon fluoride, hydrogen is introduced, zinc oxide is added, a reaction is conducted in a heat preservation mode under high temperature and high pressure to generate silicane, calcium carbonate is added into silicane, a product is obtained through an oxidation reaction under high temperature, smashed, ground, screened and mixed with deionized water to obtain paste, the paste is pressed into a blank body in a calcium silicate board mold, and the calcium silicate board is obtained through secondary curing and drying. The preparing method has the advantages of being simple in step, the obtained product is high in flatness and not prone to cracking, water seepage, layering or falling, material mechanics properties are improved by 20-30%, and the anti-bending strength is improved by 19.2% or more.
Description
Technical field
The preparation method that the present invention relates to a kind of calcium silicate board, belongs to calcium silicate board preparing technical field.
Background technology
Calcium silicate board is as new green environment protection building materials, except the function with conventional gypsum plate, have more superior fire protecting performance and moisture resistance, service life overlength advantage, it is widely used in suspended ceiling and the partition wall of industry and commerce engineering construction, the wallboard of the indoor engineering such as house decoration, the liner plate of furniture, the liner plate of billboard, the partition panel of boats and ships, the refractory slab in warehouse, net floor and tunnel.Calcium silicate board is with the loose chopped fiber such as inorganic mineral fiber or cellulose fibre for reinforcing material, with siliceous-calcareous material for main body cementing material, through slurrying, molding, in High Temperature High Pressure saturated vapor, accelerate curing reaction, form calcium silicates gel and the sheet material made.Being a kind of novel building with premium properties and industrial sheet material, its product is prevented fires, moistureproof, sound insulation, Anti-moth-eating, and durability is better, is furred ceiling, the desired decoration sheet material of partition.The preparation method of calcium silicate board has die pressing, copies and follow the example of and slurry flowing process.Common method is usually die pressing, after raw material is sufficiently stirred for ripening by design proportion, extruded by roller machine, high-temperature shaping., easily there is shrinkage cracking, infiltration humidity in general problem: calcium silicate board rough surface, the flatness produced are poor, and mechanical property and warping resistance intensity are low after using, aliquation, the phenomenon such as come off.
Summary of the invention
The technical problem to be solved: for the calcium silicate board rough surface produced at present, flatness is poor, mechanical property and warping resistance intensity are low, shrinkage cracking easily occurs after using, infiltration humidity, aliquation, obscission, provide one and weigh quartz sand, mill the powder that sieves to obtain, add Fluohydric acid. reaction and generate silicon fluoride, pass into hydrogen again, add zinc oxide, insulation reaction generates silane at high temperature under high pressure, silane adds calcium carbonate, under high temperature, oxidation reaction obtains reactant, size-reduced, mill and sieve, mix with deionized water and prepare slurry, it is pressed into base substrate in calcium silicate board with microporous mould, through secondary maintenance, the dry method preparing calcium silicate board.Preparation process of the present invention is simple, and products obtained therefrom flatness is good, not easy to crack, infiltration, aliquation, comes off, and is effectively increased mechanical property and warping resistance intensity.
For solving above-mentioned technical problem, the present invention adopts the technical scheme as described below to be:
(1) weigh 2～3kg quartz sand, put it in mill and mill, cross 80～100 mesh sieves, obtain quartz sand powder, the quartz sand powder of gained is put in reaction vessel, in reaction vessel, add quartz sand powder quality 8～10% Fluohydric acid. simultaneously, stirring reaction 2～3h, obtains silicon fluoride；
(2) hydrogen is passed into from the reaction container bottom equipped with silicon fluoride, it is 20～22mL/s that control hydrogen passes into speed, controlling to pass into the time is 10～15min, in reaction vessel, 8～12g Zinc oxide powder is added when passing into, control reaction vessel temperature 70～90 DEG C subsequently, applying pressure is 0.5～1.0MPa, and insulation reaction 2～3h obtains silane；
(3) in the silane of above-mentioned gained, add 50～60g calcium carbonate, and to control the temperature in reaction vessel be 450～550 DEG C, insulation reaction 6～8h, it is warming up to 800～900 DEG C subsequently with 5 DEG C/min rate program, oxidation reaction 2～3h, then stand be cooled to room temperature, obtain reactant；
(4) being put into by the reactant of above-mentioned gained in pulverizer and pulverize, be placed in mill and mill, cross 70～80 mesh sieves, prepare powder, by solid-to-liquid ratio 2:3, add deionized water in powder, stirring makes it be thoroughly mixed uniformly, obtains slurry；
(5) pouring in calcium silicate board with microporous mould by the slurry of above-mentioned gained, controlling to apply pressure is 13～18MPa, precompressed 2～3min, improving subsequently and applying pressure is 20～25MPa, is warming up to 80～120 DEG C with 5 DEG C/min rate program, suppresses 10～30min, it is cooled to room temperature, obtains base substrate；
(6) base substrate of gained is put in fog room, controlling fog room temperature is 20～25 DEG C, humidity is 35～45%, maintenance 4～6h, after maintenance is complete, base substrate is moved in steam pressure room, controlling steam pressure chamber pressure is 0.8～1.0MPa, the steam-cured 14～16h of constant voltage, and putting it into temperature subsequently is dry 4～6h in 105～110 DEG C of baking rooms, naturally cooled to room temperature again, namely prepared a kind of calcium silicate board.
The calcium silicate board density that the present invention prepares is 850～1350kg/m3, bending strength is 16.9～22.8MPa, and impact strength is 2.9～5.2KJ/m2, it is 0.75～0.82 at 750～950 DEG C of percent thermal shrinkages, heat conductivity is 0.132～0.153W/m K, Young's modulus of elasticity 4.63 × 103～5.42 × 103MPa, line deformation coefficient is 0.10～0.15%.
The present invention is compared with additive method, and Advantageous Effects is:
(1) preparation process of the present invention is simple, and products obtained therefrom flatness is good, not easy to crack, infiltration, aliquation, comes off；
(2) material mechanical performance improves 20～30%, and warping resistance intensity improves more than 19.2%.
Detailed description of the invention
First weigh 2～3kg quartz sand, put it in mill and mill, cross 80～100 mesh sieves, obtain quartz sand powder, the quartz sand powder of gained is put in reaction vessel, in reaction vessel, add quartz sand powder quality 8～10% Fluohydric acid. simultaneously, stirring reaction 2～3h, obtains silicon fluoride；Then hydrogen is passed into from the reaction container bottom equipped with silicon fluoride, it is 20～22mL/s that control hydrogen passes into speed, controlling to pass into the time is 10～15min, reaction vessel adds 8～12g Zinc oxide powder when passing into, control reaction vessel temperature 70～90 DEG C subsequently, applying pressure is 0.5～1.0MPa, and insulation reaction 2～3h obtains silane；In the silane of above-mentioned gained, add 50～60g calcium carbonate, and to control the temperature in reaction vessel be 450～550 DEG C, insulation reaction 6～8h, it is warming up to 800～900 DEG C subsequently with 5 DEG C/min rate program, oxidation reaction 2～3h, then stand be cooled to room temperature, obtain reactant；Being put into by the reactant of above-mentioned gained in pulverizer and pulverize, be placed in mill and mill, cross 70～80 mesh sieves, prepare powder, by solid-to-liquid ratio 2:3, add deionized water in powder, stirring makes it be thoroughly mixed uniformly, obtains slurry；Pouring in calcium silicate board with microporous mould by the slurry of above-mentioned gained again, controlling to apply pressure is 13～18MPa, precompressed 2～3min, improving subsequently and applying pressure is 20～25MPa, is warming up to 80～120 DEG C with 5 DEG C/min rate program, suppresses 10～30min, it is cooled to room temperature, obtains base substrate；Finally the base substrate of gained is put in fog room, controlling fog room temperature is 20～25 DEG C, humidity is 35～45%, maintenance 4～6h, after maintenance is complete, base substrate is moved in steam pressure room, controlling steam pressure chamber pressure is 0.8～1.0MPa, the steam-cured 14～16h of constant voltage, and putting it into temperature subsequently is dry 4～6h in 105～110 DEG C of baking rooms, naturally cooled to room temperature again, namely prepared a kind of calcium silicate board.
Example 1
First weigh 2kg quartz sand, put it in mill and mill, cross 80 mesh sieves, obtain quartz sand powder, the quartz sand powder of gained is put in reaction vessel, in reaction vessel, add quartz sand powder quality 8% Fluohydric acid., stirring reaction 2h simultaneously, obtain silicon fluoride；Then hydrogen is passed into from the reaction container bottom equipped with silicon fluoride, it is 20mL/s that control hydrogen passes into speed, controlling to pass into the time is 15min, in reaction vessel, 8g Zinc oxide powder is added when passing into, control reaction vessel temperature 70 C subsequently, applying pressure is 0.5MPa, insulation reaction 2h, obtains silane；In the silane of above-mentioned gained, add 50g calcium carbonate, and to control the temperature in reaction vessel be 450 DEG C, insulation reaction 6h, is warming up to 800 DEG C with 5 DEG C/min rate program subsequently, oxidation reaction 2h, then stand and be cooled to room temperature, obtain reactant；Being put into by the reactant of above-mentioned gained in pulverizer and pulverize, be placed in mill and mill, cross 70 mesh sieves, prepare powder, by solid-to-liquid ratio 2:3, add deionized water in powder, stirring makes it be thoroughly mixed uniformly, obtains slurry；Pouring in calcium silicate board with microporous mould by the slurry of above-mentioned gained again, controlling to apply pressure is 13MPa, precompressed 2min, and improving subsequently and applying pressure is 20MPa, is warming up to 80 DEG C with 5 DEG C/min rate program, suppresses 10min, be cooled to room temperature, obtain base substrate；Finally the base substrate of gained is put in fog room, controlling fog room temperature is 20 DEG C, humidity is 35%, maintenance 4h, after maintenance is complete, base substrate is moved in steam pressure room, controlling steam pressure chamber pressure is 0.8MPa, the steam-cured 14h of constant voltage, and putting it into temperature subsequently is dry 4h in 105 DEG C of baking rooms, naturally cooled to room temperature again, namely prepared a kind of calcium silicate board.Preparation process of the present invention is simple, and products obtained therefrom flatness is good, not easy to crack, infiltration, aliquation, comes off；Material mechanical performance improves 20%, and warping resistance intensity improves 19.5%；The calcium silicate board density prepared is 850kg/m3, bending strength is 16.9MPa, and impact strength is 2.9KJ/m2, it is 0.75 at 750 DEG C of percent thermal shrinkages, heat conductivity is 0.132W/m K, Young's modulus of elasticity 4.63 × 103MPa, line deformation coefficient is 0.10%.
Example 2
First weigh 3kg quartz sand, put it in mill and mill, cross 90 mesh sieves, obtain quartz sand powder, the quartz sand powder of gained is put in reaction vessel, in reaction vessel, add quartz sand powder quality 9% Fluohydric acid., stirring reaction 3h simultaneously, obtain silicon fluoride；Then hydrogen is passed into from the reaction container bottom equipped with silicon fluoride, it is 21mL/s that control hydrogen passes into speed, controlling to pass into the time is 15min, in reaction vessel, 10g Zinc oxide powder is added when passing into, control reaction vessel temperature 80 DEG C subsequently, applying pressure is 0.8MPa, insulation reaction 3h, obtains silane；In the silane of above-mentioned gained, add 55g calcium carbonate, and to control the temperature in reaction vessel be 500 DEG C, insulation reaction 7h, is warming up to 850 DEG C with 5 DEG C/min rate program subsequently, oxidation reaction 3h, then stand and be cooled to room temperature, obtain reactant；Being put into by the reactant of above-mentioned gained in pulverizer and pulverize, be placed in mill and mill, cross 75 mesh sieves, prepare powder, by solid-to-liquid ratio 2:3, add deionized water in powder, stirring makes it be thoroughly mixed uniformly, obtains slurry；Pouring in calcium silicate board with microporous mould by the slurry of above-mentioned gained again, controlling to apply pressure is 15MPa, precompressed 3min, and improving subsequently and applying pressure is 23MPa, is warming up to 100 DEG C with 5 DEG C/min rate program, suppresses 20min, be cooled to room temperature, obtain base substrate；Finally the base substrate of gained is put in fog room, controlling fog room temperature is 23 DEG C, humidity is 40%, maintenance 5h, after maintenance is complete, base substrate is moved in steam pressure room, controlling steam pressure chamber pressure is 0.9MPa, the steam-cured 15h of constant voltage, and putting it into temperature subsequently is dry 5h in 108 DEG C of baking rooms, naturally cooled to room temperature again, namely prepared a kind of calcium silicate board.Preparation process of the present invention is simple, and products obtained therefrom flatness is good, not easy to crack, infiltration, aliquation, comes off；Material mechanical performance improves 25%, and warping resistance intensity improves 19.9%；The calcium silicate board density prepared is 1100kg/m3, bending strength is 19.9MPa, and impact strength is 4.0KJ/m2, it is 0.78 at 850 DEG C of percent thermal shrinkages, heat conductivity is 0.142W/m K, Young's modulus of elasticity 5.03 × 103MPa, line deformation coefficient is 0.13%.
Example 3
First weigh 3kg quartz sand, put it in mill and mill, cross 100 mesh sieves, obtain quartz sand powder, the quartz sand powder of gained is put in reaction vessel, in reaction vessel, add quartz sand powder quality 10% Fluohydric acid., stirring reaction 3h simultaneously, obtain silicon fluoride；Then passing into hydrogen from the reaction container bottom equipped with silicon fluoride, controlling hydrogen, to pass into speed be 22mL/s, and controlling the time that passes into is 12min, adding 12g Zinc oxide powder when passing in reaction vessel, control reaction vessel temperature 90 DEG C subsequently, applying pressure is 1.0MPa, insulation reaction 3h, obtains silane；In the silane of above-mentioned gained, add 60g calcium carbonate, and to control the temperature in reaction vessel be 550 DEG C, insulation reaction 8h, is warming up to 900 DEG C with 5 DEG C/min rate program subsequently, oxidation reaction 3h, then stand and be cooled to room temperature, obtain reactant；Being put into by the reactant of above-mentioned gained in pulverizer and pulverize, be placed in mill and mill, cross 80 mesh sieves, prepare powder, by solid-to-liquid ratio 2:3, add deionized water in powder, stirring makes it be thoroughly mixed uniformly, obtains slurry；Pouring in calcium silicate board with microporous mould by the slurry of above-mentioned gained again, controlling to apply pressure is 18MPa, precompressed 3min, and improving subsequently and applying pressure is 25MPa, is warming up to 120 DEG C with 5 DEG C/min rate program, suppresses 30min, be cooled to room temperature, obtain base substrate；Finally the base substrate of gained is put in fog room, controlling fog room temperature is 25 DEG C, humidity is 45%, maintenance 6h, after maintenance is complete, base substrate is moved in steam pressure room, controlling steam pressure chamber pressure is 1.0MPa, the steam-cured 16h of constant voltage, and putting it into temperature subsequently is dry 6h in 110 DEG C of baking rooms, naturally cooled to room temperature again, namely prepared a kind of calcium silicate board.Preparation process of the present invention is simple, and products obtained therefrom flatness is good, not easy to crack, infiltration, aliquation, comes off；Material mechanical performance improves 30%, and warping resistance intensity improves 20.5%；The calcium silicate board density prepared is 1350kg/m3, bending strength is 22.8MPa, and impact strength is 5.2KJ/m2, it is 0.82 at 950 DEG C of percent thermal shrinkages, heat conductivity is 0.153W/m K, Young's modulus of elasticity 5.42 × 103MPa, line deformation coefficient is 0.15%.
Claims (1)
1. the preparation method of a calcium silicate board, it is characterised in that concrete preparation process is:
(1) weigh 2～3kg quartz sand, put it in mill and mill, cross 80～100 mesh sieves, obtain quartz sand powder, the quartz sand powder of gained is put in reaction vessel, in reaction vessel, add quartz sand powder quality 8～10% Fluohydric acid. simultaneously, stirring reaction 2～3h, obtains silicon fluoride；
(2) hydrogen is passed into from the reaction container bottom equipped with silicon fluoride, it is 20～22mL/s that control hydrogen passes into speed, controlling to pass into the time is 10～15min, in reaction vessel, 8～12g Zinc oxide powder is added when passing into, control reaction vessel temperature 70～90 DEG C subsequently, applying pressure is 0.5～1.0MPa, and insulation reaction 2～3h obtains silane；
(3) in the silane of above-mentioned gained, add 50～60g calcium carbonate, and to control the temperature in reaction vessel be 450～550 DEG C, insulation reaction 6～8h, it is warming up to 800～900 DEG C subsequently with 5 DEG C/min rate program, oxidation reaction 2～3h, then stand be cooled to room temperature, obtain reactant；
(4) being put into by the reactant of above-mentioned gained in pulverizer and pulverize, be placed in mill and mill, cross 70～80 mesh sieves, prepare powder, by solid-to-liquid ratio 2:3, add deionized water in powder, stirring makes it be thoroughly mixed uniformly, obtains slurry；
(5) pouring in calcium silicate board with microporous mould by the slurry of above-mentioned gained, controlling to apply pressure is 13～18MPa, precompressed 2～3min, improving subsequently and applying pressure is 20～25MPa, is warming up to 80～120 DEG C with 5 DEG C/min rate program, suppresses 10～30min, it is cooled to room temperature, obtains base substrate；
(6) base substrate of gained is put in fog room, controlling fog room temperature is 20～25 DEG C, humidity is 35～45%, maintenance 4～6h, after maintenance is complete, base substrate is moved in steam pressure room, controlling steam pressure chamber pressure is 0.8～1.0MPa, the steam-cured 14～16h of constant voltage, and putting it into temperature subsequently is dry 4～6h in 105～110 DEG C of baking rooms, naturally cooled to room temperature again, namely prepared a kind of calcium silicate board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610240106.8A CN105777044A (en) | 2016-04-18 | 2016-04-18 | Preparing method for calcium silicate board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610240106.8A CN105777044A (en) | 2016-04-18 | 2016-04-18 | Preparing method for calcium silicate board |
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| CN105777044A true CN105777044A (en) | 2016-07-20 |
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| CN201610240106.8A Withdrawn CN105777044A (en) | 2016-04-18 | 2016-04-18 | Preparing method for calcium silicate board |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801483A (en) * | 2017-03-02 | 2017-06-06 | 青岛科瑞新型环保材料集团有限公司 | A kind of non-dismantling formwork heat insulating decorative board external wall protection body system and its construction method |
| CN106836562A (en) * | 2017-03-27 | 2017-06-13 | 青岛科瑞新型环保材料集团有限公司 | A kind of steel construction assembling type outer wall system and its construction method |
| CN109053223A (en) * | 2018-08-27 | 2018-12-21 | 桂林桂特板业有限公司 | A kind of maintenance process of calcium silicate board |
-
2016
- 2016-04-18 CN CN201610240106.8A patent/CN105777044A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801483A (en) * | 2017-03-02 | 2017-06-06 | 青岛科瑞新型环保材料集团有限公司 | A kind of non-dismantling formwork heat insulating decorative board external wall protection body system and its construction method |
| CN106836562A (en) * | 2017-03-27 | 2017-06-13 | 青岛科瑞新型环保材料集团有限公司 | A kind of steel construction assembling type outer wall system and its construction method |
| CN109053223A (en) * | 2018-08-27 | 2018-12-21 | 桂林桂特板业有限公司 | A kind of maintenance process of calcium silicate board |
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Application publication date: 20160720 |