CN105601222B - A kind of preparation method of plastering - Google Patents
A kind of preparation method of plastering Download PDFInfo
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- CN105601222B CN105601222B CN201510980318.5A CN201510980318A CN105601222B CN 105601222 B CN105601222 B CN 105601222B CN 201510980318 A CN201510980318 A CN 201510980318A CN 105601222 B CN105601222 B CN 105601222B
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- land plaster
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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
- C04B28/14—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 calcium sulfate cements
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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)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The invention provides a kind of preparation method of plastering, comprise the following steps：A) after gypsum raw material grinding is sieved, baked, obtain land plaster；B) after mixing land plaster, niter cake and water, injection molding is carried out, gypsum test block is obtained；The mass ratio of the land plaster and niter cake is 100：(0.2~0.3)；C) gypsum test block is dried, obtains plastering.Compared with prior art, the preparation method for the plastering that the present invention is provided is by adding the niter cake of specific consumption, on the basis of water consumption is not reduced, improve the rate of drying in plastering preparation process, so that slurry has stable fluidity in preparation process, it is ensured that the plastering prepared has higher intensity.Test result indicates that, the index of aridity for the plastering that the present invention is provided is more than 12.38%, and the intensity of plastering is 2.2MPa~2.5MPa.
Description
Technical field
It is to be related to a kind of preparation method of plastering more specifically the present invention relates to gypsum technical field.
Background technology
Gypsum is a kind of widely used industrial materials and construction material, available for gypsum building products, cement retarder,
Modelling, medical food additive, gas washing in SA production, filler, paint filler etc..In recent years, gypsum material and gypsum system
Product apply more in the decoration and finishing of architecture indoor, especially in the decoration and finishing of home dwelling.With applying other
Same type of material is compared, the characteristics of plastering has relatively light quality, intensity height, fire protecting performance is good, with this material system
Into sheet material, its flame-retardant grade is one-level, is one of the preferred material of various environment indoor decoratings.
At present, the preparation method of plastering, which is mainly, to be dried after the thick slurry injection molding of a calibration, obtains gypsum
Product.Wherein, rate of drying has a significant impact to the preparation process and properties of product of plastering；Meanwhile, drying process is also
The major source of energy consumption in preparation process, control rate of drying is energy-saving to production line significant.Prior art passes through
The mode of addition foaming agent, water reducer or fecula coagulant improves the rate of drying in plastering preparation process in slurry.
Wherein, foaming agent typically uses lauryl sodium sulfate K12 or compound prescription, can form hollow in plastering, reduces
Plaster of Paris usage amount and aquation water consumption, so as to improve the rate of drying in plastering preparation process；Water reducer can
The fluidity of plaster of Paris slurry is improved, shaping water consumption is reduced, so as to improve rate of drying；Fecula coagulant is given birth to for plasterboard
Leftover pieces fecula produced by during production, specific surface area is higher, and induction crystallization can be played by being added to after slurry, reduces
Water consumption, so as to improve rate of drying.
But, the mechanism that above-mentioned additive improves rate of drying is all by reducing pulp flow in water consumption, preparation process
Dynamic degree can be decreased obviously, and obtained plastering intensity is not high.
The content of the invention
In view of this, it is an object of the invention to provide a kind of preparation method of plastering, provided using the present invention
Preparation method, while rate of drying is improved, it is ensured that plastering has higher-strength.
The invention provides a kind of preparation method of plastering, comprise the following steps：
A) after gypsum raw material grinding is sieved, baked, obtain land plaster；
B) after mixing land plaster, niter cake and water, injection molding is carried out, gypsum test block is obtained；The land plaster and sulfuric acid
The mass ratio of hydrogen sodium is 100：(0.2~0.3)；
C) gypsum test block is dried, obtains plastering.
It is preferred that, the grade content of gypsum raw material described in step a) is 80%~95%.
It is preferred that, the screen size of the sieving of grinding described in step a) is the mesh of 15 mesh~25.
It is preferred that, the temperature baked described in step a) is 150 DEG C~160 DEG C, and the time is 50min~70min.
It is preferred that, the crystal water content of land plaster described in step b) is 5.5%~6%.
It is preferred that, the mass ratio of land plaster and water described in step b) is 100：(60~70).
It is preferred that, the process mixed described in step b) specifically includes following steps：
B1) land plaster and niter cake are mixed, powder is obtained；
B2) powder is added to the water mixing, slurry is obtained.
It is preferred that, step b2) described in the mode that mixes be stirring；The rotating speed of the stirring is 150r/min~170r/
Min, the time is 25s~35s.
It is preferred that, the time of injection molding described in step b) is 40min~50min.
It is preferred that, the temperature dried described in step c) is 40 DEG C~60 DEG C, and the time is 2h~24h.
The invention provides a kind of preparation method of plastering, comprise the following steps：A) gypsum raw material grinding is sieved
Afterwards, baked, obtain land plaster；B) after mixing land plaster, niter cake and water, injection molding is carried out, gypsum test block is obtained；Institute
The mass ratio for stating land plaster and niter cake is 100：(0.2~0.3)；C) gypsum test block is dried, obtains plastering.
Compared with prior art, the preparation method of plastering that the present invention is provided is by adding the niter cake of specific consumption, not
Reduce on the basis of water consumption, the rate of drying in plastering preparation process is improved, so that slurry has in preparation process
Stable fluidity, it is ensured that the plastering prepared has higher intensity.Test result indicates that, the stone that the present invention is provided
The index of aridity of cream product is more than 12.38%, and the intensity of plastering is 2.2MPa~2.5MPa.
Embodiment
Below in conjunction with the embodiment of the present invention, technical scheme is clearly and completely described, it is clear that institute
The embodiment of description is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention,
The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, belongs to this hair
The scope of bright protection.
The invention provides a kind of preparation method of plastering, comprise the following steps：
A) after gypsum raw material grinding is sieved, baked, obtain land plaster；
B) after mixing land plaster, niter cake and water, injection molding is carried out, gypsum test block is obtained；The land plaster and sulfuric acid
The mass ratio of hydrogen sodium is 100：(0.2~0.3)；
C) gypsum test block is dried, obtains plastering.
In the present invention, after gypsum raw material grinding is sieved, baked, obtain land plaster.In the present invention, the stone
The grade content of cream raw material is preferably 80%~95%, and more preferably 85%~90%.In the present invention, the gypsum raw material
Grade content refers to the weight of calcium sulfate in Unit Weight gypsum raw material.The present invention does not have to the species of the gypsum raw material and source
Have specifically limited, using the natural gypsum or the chemical by-product and ardealite of sulfur acid calcium, fluorgypsum, boron gypsum of sulfur acid calcium
Deng waste residue.In the preferred embodiment of the invention, the gypsum raw material is the ardealite that grade content is 85%~90%
With compound of the grade content for 85%~90% desulfurated plaster, the mass ratio of the ardealite and desulfurated plaster is preferably 7：
(2~4), more preferably 7：3.
The present invention first sieves gypsum raw material grinding, obtains gypsum raw material powder.The present invention sieves to the grinding
Equipment is not particularly limited, using gypsum grinding machine well known to those skilled in the art.In the present invention, the grinding sieving
Process be conducive to bake during attached water removing and the progress of subsequent step.In the present invention, the grinding sieves
Screen size is preferably the mesh of 15 mesh~25, more preferably 20 mesh.
Complete after the grinding sieving process, the present invention is baked obtained gypsum raw material powder, obtains land plaster.
The present invention is not particularly limited to the equipment of the baking, using baking oven well known to those skilled in the art.In the present invention
In, the purpose of the baking is to remove the attached water in gypsum raw material completely, while controlling the crystal water content of land plaster.
In the present invention, the temperature of the baking is preferably 150 DEG C~160 DEG C, more preferably 155 DEG C；The time of the baking is preferably
50min~70min, more preferably 60min.In the present invention, after gypsum raw material grinding is sieved, baked, obtain gypsum
Attached water is free of in powder, the land plaster, while the content of the crystallization water is controlled 5.5%~6%.
Obtain after the land plaster, after the present invention mixes land plaster, niter cake and water, carry out injection molding, obtain gypsum
Test block.In the present invention, the mass ratio of the land plaster and niter cake is 100：(0.2~0.3), preferably 100：0.2.
In the present invention, the niter cake for adding specific consumption has a significant effect to accelerating plastering drying.
In the present invention, land plaster, niter cake and water are mixed, the process of the mixing preferably specifically includes following step
Suddenly：
B1) land plaster and niter cake are mixed, powder is obtained；
B2) powder is added to the water mixing, slurry is obtained.
In the present invention, land plaster and niter cake are mixed, obtains powder.The present invention does not have to the process of the mixing
It is specifically limited, can be well mixed by above two powder.
Obtain after the powder, powder is added to the water mixing by the present invention, obtains slurry.In the present invention, it is described mixed
The mode of conjunction is preferably stirring；The rotating speed of the stirring is preferably 150r/min~170r/min, more preferably 160r/min；Institute
The time for stating stirring is preferably 25s~35s, more preferably 30s.The present invention is not particularly limited to the equipment of the mixing, is adopted
With mixing bowl well known to those skilled in the art.In the preferred embodiment of the invention, the thick use of different marks is first according to
Water is added water in the mixing bowl, then the powder is added into mixing bowl, is then stirred, is obtained according to above-mentioned condition
Slurry.In the present invention, the mass ratio of the land plaster and water is preferably 100：(60~70), more preferably 100：65.
Obtain after the slurry, slurry is carried out injection molding by the present invention, obtains gypsum test block.Mill of the present invention to the injection molding
Tool is not particularly limited, using three joint-trials mould well known to those skilled in the art.In the present invention, the time of the injection molding
Preferably 40min~50min, more preferably 45min.In the preferred embodiment of the invention, slurry is poured into rapidly three first
In joint-trial mould, additional size is wiped off with scraper, flat surface is scraped, form removal after injection molding certain time obtains gypsum test block.
Obtain after the gypsum test block, gypsum test block is dried, plastering is obtained.The present invention is to the drying
Equipment is not particularly limited, using electric drying oven with forced convection well known to those skilled in the art.In the present invention, it is described dry
Dry temperature is preferably 40 DEG C~60 DEG C, more preferably 50 DEG C；The time of the drying is preferably 2h~24h, more preferably 6h
~8h.
The invention provides a kind of preparation method of plastering, comprise the following steps：A) gypsum raw material grinding is sieved
Afterwards, baked, obtain land plaster；B) land plaster, niter cake and water are mixed, carries out injection molding, obtain gypsum test block；It is described
The mass ratio of land plaster and niter cake is 100：(0.2~0.3)；C) gypsum test block is dried, obtains plastering.With
Prior art is compared, and the preparation method of plastering that the present invention is provided is not being subtracted by adding the niter cake of specific consumption
On the basis of few water consumption, the rate of drying in plastering preparation process is improved, so that slurry has surely in preparation process
Fixed fluidity, it is ensured that the plastering prepared has higher intensity.Test result indicates that, the gypsum that the present invention is provided
The index of aridity of product is more than 12.38%, and the intensity of plastering is 2.2MPa~2.5MPa.
In addition, the preparation method of the invention provided is simple to operate, cost is low, to the energy-saving of plastering preparation process
It is significant.
In order to further illustrate the present invention, it is described in detail below by following examples.Following examples of the present invention
Gypsum raw material used is the horizontal power plant desulfurization gypsum of Feicheng stone and Liaocheng ardealite, and the grade content of above two gypsum is
85%~90%.
Embodiment 1
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.2% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 65% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity of the plastering provided using ZK-35A type electric vacunm drying casees embodiment 1 is detected, is tied
Fruit shows that the index of aridity for the plastering that the embodiment of the present invention 1 is provided is 14.85%；Using KZJ-500 type electric bending testings
The intensity for the plastering that machine is provided embodiment 1 is detected, is as a result shown, the plastering that the embodiment of the present invention 1 is provided
Intensity be 2.5MPa.
Embodiment 2
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.3% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 65% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided embodiment 2 are detected, are tied
Fruit shows that the index of aridity for the plastering that the embodiment of the present invention 2 is provided is 13.99%, and intensity is 2.2MPa.
Embodiment 3
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.2% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 65% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 40 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided embodiment 3 are detected, are tied
Fruit shows that the index of aridity for the plastering that the embodiment of the present invention 3 is provided is 12.38%, and intensity is 2.3MPa.
Embodiment 4
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.2% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 65% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 6h is dried into above-mentioned gypsum test block in 60 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided embodiment 4 are detected, are tied
Fruit shows that the index of aridity for the plastering that the embodiment of the present invention 4 is provided is 13.91%, and intensity is 2.3MPa.
Embodiment 5
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.2% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 60% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided embodiment 7 are detected, are tied
Fruit shows that the index of aridity for the plastering that the embodiment of the present invention 7 is provided is 15.96%, and intensity is 2.4MPa.
Embodiment 6
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.2% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 60% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 6h is dried into above-mentioned gypsum test block in 60 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided embodiment 8 are detected, are tied
Fruit shows that the index of aridity for the plastering that the embodiment of the present invention 8 is provided is 15.56%, and intensity is 2.2MPa.
Embodiment 7
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.3% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 60% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 40 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided embodiment 9 are detected, are tied
Fruit shows that the index of aridity for the plastering that the embodiment of the present invention 9 is provided is 13.56%, and intensity is 2.2MPa.
Embodiment 8
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.2% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 70% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity of plastering and intensity that the method provided according to embodiment 1 is provided embodiment 10 detect,
As a result show, the index of aridity for the plastering that the embodiment of the present invention 10 is provided is 14.85%, and intensity is 2.4MPa.
Comparative example 1
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) added water to according to the thick water consumption of 65% mark in mixing bowl, then above-mentioned land plaster is rapidly added in water,
30s is stirred under 160r/min speed conditions, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, is wiped off with scraper many
Remaining slurry material, scrapes form removal after flat surface, injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided comparative example 1 are detected, are tied
Fruit shows that the index of aridity for the plastering that comparative example 1 of the present invention is provided is 12.26%, and intensity is 2.0MPa.
Comparative example 2
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.1% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 65% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided comparative example 2 are detected, are tied
Fruit shows that the index of aridity for the plastering that comparative example 2 of the present invention is provided is 12.11%, and intensity is 1.9MPa.
Comparative example 3
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) niter cake that land plaster quality 0.4% is added in above-mentioned land plaster is well mixed, and obtains powder；According to
The thick water consumption of 65% mark is added water in mixing bowl, then the powder is rapidly added in water, in 160r/min rotating speed bar
30s is stirred under part, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, additional size is wiped off with scraper, scrapes flat surface,
Form removal after injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided comparative example 3 are detected, are tied
Fruit shows that the index of aridity for the plastering that comparative example 3 of the present invention is provided is 13.86%, and intensity is 1.7MPa.
Comparative example 4
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) added water to according to the thick water consumption of 70% mark in mixing bowl, then above-mentioned land plaster is rapidly added in water,
30s is stirred under 160r/min speed conditions, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, is wiped off with scraper many
Remaining slurry material, scrapes form removal after flat surface, injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided comparative example 4 are detected, are tied
Fruit shows that the index of aridity for the plastering that comparative example 4 of the present invention is provided is 11.26%, and intensity is 1.9MPa.
Comparative example 5
(1) compound of 3.5kg ardealites and 1.5kg desulfurated plasters is carried out after grinding, crosses 20 mesh sub-sieves, Ran Houfang
60min is baked in the baking oven for entering 155 DEG C, land plaster is obtained.
(2) added water to according to the thick water consumption of 60% mark in mixing bowl, then above-mentioned land plaster is rapidly added in water,
30s is stirred under 160r/min speed conditions, slurry is obtained；Then slurry is poured into rapidly to three joint-trial moulds, is wiped off with scraper many
Remaining slurry material, scrapes form removal after flat surface, injection molding 45min, obtains gypsum test block.
(3) 8h is dried into above-mentioned gypsum test block in 50 DEG C of air dry oven, obtains plastering.
The index of aridity and intensity for the plastering that the method provided according to embodiment 1 is provided comparative example 5 are detected, are tied
Fruit shows that the index of aridity for the plastering that comparative example 5 of the present invention is provided is 13.26%, and intensity is 1.9MPa.
Compare and understand, in the case where identical mark is thick, the index of aridity and intensity of the plastering that the present invention is provided are above comparative example,
Although higher temperature can also improve the index of aridity of plastering, shadow of the niter cake to the index of aridity of certain content is added
Sound is bigger；Meanwhile, when the addition of niter cake is 0.1%, the raising to rate of drying is not obvious, and can reduce gypsum system
Product intensity；When the addition of niter cake is 0.4%, effect is improved to rate of drying, but plastering intensity is dropped
It is low obvious.
The described above of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.It is right
A variety of modifications of these embodiments will be apparent for those skilled in the art, and as defined herein one
As principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will
It will not be intended to be limited to the embodiments shown herein, and be to fit to consistent with principles disclosed herein and features of novelty
Most wide scope.
Claims (8)
1. a kind of preparation method of plastering, it is characterised in that comprise the following steps：
A) after gypsum raw material grinding is sieved, baked, obtain land plaster；The gypsum raw material be grade content be 85%~
90% ardealite and grade content is the compound of 85%~90% desulfurated plaster, the matter of the ardealite and desulfurated plaster
Amount is than being 7：(2~4)；
B) after mixing land plaster, niter cake and water, injection molding is carried out, gypsum test block is obtained；The land plaster and niter cake
Mass ratio be 100：(0.2~0.3)；The crystal water content of the land plaster is 5.5%~6%；
C) gypsum test block is dried, obtains plastering.
2. preparation method according to claim 1, it is characterised in that the screen size of the sieving of grinding described in step a) is
The mesh of 15 mesh~25.
3. preparation method according to claim 1, it is characterised in that the temperature baked described in step a) is 150 DEG C~
160 DEG C, the time is 50min~70min.
4. preparation method according to claim 1, it is characterised in that the mass ratio of land plaster and water is described in step b)
100：(60~70).
5. preparation method according to claim 1, it is characterised in that the process mixed described in step b) specifically include with
Lower step：
B1) land plaster and niter cake are mixed, powder is obtained；
B2) powder is added to the water mixing, slurry is obtained.
6. preparation method according to claim 5, it is characterised in that step b2) described in the mode that mixes be stirring；Institute
The rotating speed for stating stirring is 150r/min~170r/min, and the time is 25s~35s.
7. preparation method according to claim 1, it is characterised in that the time of injection molding described in step b) be 40min~
50min。
8. preparation method according to claim 1, it is characterised in that the temperature dried described in step c) is 40 DEG C~60
DEG C, the time is 2h~24h.
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| CN201510980318.5A CN105601222B (en) | 2015-12-23 | 2015-12-23 | A kind of preparation method of plastering |
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| CN201510980318.5A CN105601222B (en) | 2015-12-23 | 2015-12-23 | A kind of preparation method of plastering |
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| CN105601222B true CN105601222B (en) | 2017-10-20 |
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| CN1341084A (en) * | 1999-12-28 | 2002-03-20 | 美国石膏公司 | Calcined gypsum hydration enhaucing additives |
| CN102531510A (en) * | 2011-12-15 | 2012-07-04 | 青岛金王应用化学股份有限公司 | Fragrant high-hardness gypsum artwork and preparation method thereof |
| CN102718461A (en) * | 2012-06-29 | 2012-10-10 | 景德镇陶瓷学院 | Molding process method for preparing gypsum mold by hydrothermal method and product prepared by using method |
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| CN1341084A (en) * | 1999-12-28 | 2002-03-20 | 美国石膏公司 | Calcined gypsum hydration enhaucing additives |
| US6409823B1 (en) * | 1999-12-28 | 2002-06-25 | United States Gypsum Company | Hydration enhancing additives |
| CN102531510A (en) * | 2011-12-15 | 2012-07-04 | 青岛金王应用化学股份有限公司 | Fragrant high-hardness gypsum artwork and preparation method thereof |
| CN102718461A (en) * | 2012-06-29 | 2012-10-10 | 景德镇陶瓷学院 | Molding process method for preparing gypsum mold by hydrothermal method and product prepared by using method |
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Address after: 271026 Shandong Province, Tai'an city Daiyue District Dawenkou Patentee after: Taishan Gypsum Co Address before: 271026 Shandong city of Tai'an province Taishan Industrial Park Taishan Gypsum Co Dawenkou gypsum Patentee before: Taishan Gypsum Co., Ltd. |
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