CN106006695B - A kind of high-strength composite Gypsum Fibrosum micropowder preparation method - Google Patents
A kind of high-strength composite Gypsum Fibrosum micropowder preparation method Download PDFInfo
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- CN106006695B CN106006695B CN201610315766.8A CN201610315766A CN106006695B CN 106006695 B CN106006695 B CN 106006695B CN 201610315766 A CN201610315766 A CN 201610315766A CN 106006695 B CN106006695 B CN 106006695B
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- C01F11/46—Sulfates
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Abstract
The present invention relates to gypsum technical field of modification, especially a kind of high-strength composite Gypsum Fibrosum micropowder and preparation method thereof, after raw gypsum is carried out Free water removing, after being prepared into the Gypsum Fibrosum micropowder or ultra-fine Gypsum Fibrosum micropowder of the above fineness of 600 mesh, when so that the Gypsum Fibrosum micropowder obtained being applied to other product preparation fields as modifying agent or filler, enable to intensity high, and the activity of the Gypsum Fibrosum micropowder product obtained is stronger；In addition to this, the stability of Gypsum Fibrosum micropowder is stronger, is unlikely to deteriorate, when improving it as modifying agent or filler material, it is more excellent with the compatibility of unclassified stores and the performance being uniformly mixed, so as to be applied in the preparation of military project material product as modifying agent and/or filler material；The added value for improving gypsum application expands gypsum application field, it is ensured that industry by-product gypsum comprehensive utilization is higher, reduces the environmental pollution rate during phosphoric acid by wet process industry, has pushed the development of phosphoric acid by wet process industry.
Description
Technical field
The present invention relates to gypsum technical field of modification, especially a kind of high-strength composite Gypsum Fibrosum micropowder preparation method.
Background technique
Gypsum, main component are calcium sulfate and its hydrate, are widely used in industrial materials and construction material, are such as used
Make cement retarder, gypsum building products, modelling, medical food additive, gas washing in SA production, various fillers etc..But day
Right gypsum, industry by-product gypsum powder fineness only between 100-200 mesh so that can only be by the original as building field
Material, causes to hinder the natural gypsum, industrial by-product stone to the application range more limitation of the natural gypsum, industry by-product gypsum
The extensive use of cream reduces comprehensive utilization ratio, especially industry by-product gypsum, wherein due to containing a large amount of impurity, so that
Its comprehensive utilization ratio is lower, constrains the development of phosphoric acid by wet process industry.
In consideration of it, occurring the lot of documents comprehensively utilized to gypsum in the prior art, as number of patent application is
A kind of its process of 2015104925379 " preparation method of the modification fluorine gypsum powder for brushing gypsum " dries gypsum
It crushes, after calcining pulverization process, then is prepared into the modification fluorgypsum for brushing gypsum after addition modifier treatment thereto
Powder；For another example number of patent application be 201410831844.0 " a kind of calcination method of titanium gypsum " its by contain Free water titanium stone
Cream is sent into feed bin, using 50-60 DEG C of drying with it is broken after, then be sent to 180-220 DEG C of high-temperature calcination, by crushing grinding,
It is obtained after screening, solves the dust losing issue of traditional titanium gypsum Duan Shaozhong；For another example number of patent application is 200710013988.5
" a kind of liquid phase method produce α-land plaster technique " by raw gypsum be ground into fineness and distribution of particles D50 10-100mm it
Between dihydrate gypsum powder, then dihydrate gypsum powder is mixed into concentration in the gypsum material of 1395 ± 50g/cm2 with water in blending tank
Slurry, heating turn crystalline substance into α-land plaster.
In conclusion being using high-temperature calcination mostly during being handled in the prior art for gypsum comprehensive utilization
Processing, and modifying agent is added or carries out being further processed for other techniques, so that the performance of the land plaster obtained is more excellent；But
Can be learnt according to the common sense of those skilled in the art: either the natural gypsum, industry by-product gypsum, main component are equal
It is calcium sulfate, easily forms the crystallization water, and then the mistake when carrying out calcination processing, from calcium sulphate dihydrate to anhydrous gypsum with water
Cheng Zhong, the removing principle of the crystallization water are to start the exclusion for the crystallization water occur, and be divided into 3 crystallizations after temperature is higher than 100 DEG C
The elimination phase of water: 105~180 DEG C, 1 hydrone is discharged first, half of hydrone is immediately discharged, is changed into bassanite
Ca[SO4]·0.5H2O, the also referred to as plaster of paris or semi-hydrated gypsum.200~220 DEG C, remaining half of hydrone is discharged, is changed into III
Type anhydrite Ca [SO4]·εH2O (0.06 < ε < 0.11).About 350 DEG C, it is changed into II type gypsum Ca [SO4].At 1120 DEG C into
One step is changed into I type anhydrite.1450 DEG C of melting temperature.
It can be seen that in the prior art in the preparation process of land plaster, its purpose is to make in raw gypsum
The crystallization water be removed, reduce raw gypsum in crystal water content so that obtain land plaster in moisture content it is lower,
Improve the properties of land plaster；In addition to this, it is also realized by the mode etc. of conversion crystallization and land plaster is purified, changed
The purpose of the quality of kind land plaster；But it is during processing, since it uses high-temperature calcination to handle and convert crystallization treatment,
So that obtain land plaster energy consumption it is higher, the process is more complicated, and cost is larger, particularly with conversion crystallization in,
It is difficult to realize handle raw gypsum on a large scale, so that the comprehensive utilization ratio of industry by-product gypsum is lower；High-temperature process
In, it needs a large amount of energy consumption to carry out calcination processing to raw gypsum, is being ground, so that energy consumption is larger, and in height
After temperature calcining, a large amount of crystallization water removing, so that last pulverizing, the moisture easily in absorption environment leads to product
Stability it is poor, and then be difficult to be widely used, reduce the added value and comprehensive utilization ratio of land plaster.
Summary of the invention
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of high-strength composite Gypsum Fibrosum micropowder
Preparation method.
Its specific technical solution are as follows: after raw gypsum is sloughed Free water, be prepared into mesh number >=600
Purpose micro mist.The raw gypsum used is the mixture of the natural gypsum or industry by-product gypsum or both.It uses and contains at these
Have in the technical solution of industry by-product gypsum, is primarily related at least one of ardealite, desulfurized gypsum, fluorgypsum etc.
Or its mutual mixture.Using two water states gypsum raw material preparation when, be using 40-90 DEG C temperature by its
The moisture drying and processing on surface is ground into powder when so that gypsum raw material handling constant weight；In order to make treatment process
In energy consumption and process cycle controlled, the temperature for being dried to raw gypsum also used is optimal for 60 DEG C.Using
When at least one of α-gypsum, β-gypsum, anhydrous gypsum etc. are handled as raw gypsum, it is directly sent to grinder
Middle processing grind into powder.During being ground, the grinder used is high pressure abrasive machine.By its
Sloughing Free water is that the natural gypsum and/or industry by-product gypsum carried out to drying to constant weight using 40-90 DEG C of temperature.
In addition to that mentioned above, the present invention is using additivated mode is added, so that the micro mist of preparation is active micro mist.Addition
Additive be mainly active additive.The additive added in certain schemes is can to block outside water molecule and micro mist knot
It closes, avoids forming Free water in micro mist, mention the substance of high-activity micro powder thermal stability, such as stearic acid, stearate, stone
Any mixture of one or more of wax, barium cadmium stabilizer, barium zinc stabilizer.Additive is added to drying to constant weight
Gypsum raw material in after, be mixed and be ground into micro mist.The stearate of use, be calcium stearate, in magnesium stearate extremely
In addition to this few one kind can also use other stearate, such as zinc stearate.After being sloughed to Free water, adopt
After the step of being handled with broken, sieving, product is obtained.During carrying out sieving processing, product fineness reaches the sieve of use
When to 600 mesh, sieving rate is that 93-97% is optimal；In certain schemes, it is prepared into the micro mist of 1200 mesh, sieving rate
It is optimal for 93-96%；In certain schemes, it is prepared into the micro mist of 3000 mesh, sieving rate is that 93-96% is optimal.At certain
It is Gypsum Fibrosum micropowder when being prepared into the micro mist of 600-1200 mesh in a little schemes；In the product that it is prepared into 1200 mesh or more
When, it is ultra-fine Gypsum Fibrosum micropowder.The additive amount of the additive of addition is the 0.01-0.1% for accounting for gypsum inventory, when optimal
The quality of material for being selected as 0.05% calculates addition.
Gypsum Fibrosum micropowder of the invention is applied in product as conduct in modifying agent, such as paint, plastics, rubber product
Modifying agent obtains product activity with higher；In addition to this, in certain application schemes, also it is applied to military project material
Material products are as modifying agent；Simultaneously using the product as filler material also in certain schemes, applied to the preparation in various products,
Such as make cement retarder, gypsum building products, modelling, intensity and activity with higher can improve the production of preparation
The performance and quality of product.
After raw gypsum is carried out Free water removing by the present invention, in the Gypsum Fibrosum micropowder for being prepared into the above fineness of 600 mesh
Perhaps so that the Gypsum Fibrosum micropowder obtained is applied to other product preparation fields as modifying agent or filling after ultra-fine Gypsum Fibrosum micropowder
When agent, enable to intensity high, and the activity of the Gypsum Fibrosum micropowder product obtained is stronger；In addition to this, the stabilization of Gypsum Fibrosum micropowder
Property is stronger, is unlikely to deteriorate, and when improving it as modifying agent or filler material, and the compatibility of unclassified stores and is uniformly mixed
Performance it is more excellent, so as to be applied in the preparation of military project material product as modifying agent and/or filler material；It improves
The added value of gypsum application expands gypsum application field, it is ensured that industry by-product gypsum comprehensive utilization is higher, reduces wet process
Environmental pollution rate during phosphoric acid industry, has pushed the development of phosphoric acid by wet process industry.
The present invention on the basis of the above, in order to improve the stability of Gypsum Fibrosum micropowder product, it is ensured that Gypsum Fibrosum micropowder product
During preservation, or in application process, the stability of quality is more excellent, the additive also carried out in certain embodiments
It is added, enables additive that the hydrone in land plaster and environment is blocked to act on, it is ensured that more excellent, the Jin Erneng of activity of land plaster
It is enough a large amount of applied to as being used as filler in PVC pipe preparation, modifying agent is used as in preparation as painted；In addition to this, additionally it is possible to
It is applied in military project material product as modifying agent and/or filler etc..
During above-mentioned addition additive, additive amount is the 0.01-0.5% for accounting for material quality.Or it will be above-mentioned
Additive substituted using auxiliary material after add, or addition is mixed with auxiliary material, wherein the additive amount of auxiliary material accounts for material quality
1-20%.
The auxiliary material is one or more of water quenching Phosphorus Slag, water quenching steel slag, water-quenched blast-furnace slag, quick lime.
Gypsum Fibrosum micropowder prepared by embodiment 1, embodiment 2, embodiment 3 is prepared by researcher of the invention applied to product
Test specimen, as experimental group 1, experimental group 2, experimental group 3；The raw gypsum that embodiment 1-3 is used is according to traditional calcining, grinding
After step process, it is applied in the preparation of construction material, is prepared into test specimen, as a control group 1, control group 2, control group 3；
Test specimen obtained above is placed in steam-pressure maintaining device, carries out steam press maintenance processing according to traditional curing condition
2h, then detect to its flexural strength, in addition to this, this researcher is also during being prepared into land plaster, to land plaster
After being ground according to the grinding method of embodiment 1-3, then is carried out sieving after standing 1-3 days in natural environment and handled, and
Sieving rate under its various granularity is detected, the results are shown in Table 1:
Table 1
It is shown by the data in table 1, it can be deduced that, Gypsum Fibrosum micropowder of the invention is applied in product preparation process, can
Relatively traditional gypsum is applied to product preparation field after carrying out high-temperature calcination processing, can effectively improve the anti-folding of product
Intensity；And after processing method of the invention carries out Gypsum Fibrosum micropowder preparation, after being handled with traditional processing method,
Grinding method according to the invention, control energy consumption that experimental group and control group are ground it is consistent when, and to obtaining land plaster
When carrying out the sieve processing of identical mesh number again, sieving rate can be effectively improved, the energy consumption in process of lapping is reduced；It is main
The water molecules for being the stability for improving gypsum product, avoiding in land plaster and environment, improve the work of land plaster
Property.
The present invention can ensure land plaster in order to ensure that the activity of land plaster is largely improved
Stability is stronger, is avoided and is ground so that additive blocks the hydrone in environment in conjunction with land plaster using the addition of additive
The land plaster moisture absorption clayed into power is agglomerating, improves land plaster quality；Simultaneously or land plaster is obtained as filler or modification
It is more excellent with the compatibility performance of unclassified stores after agent is added in raw material, it reduces land plaster and the higher environment of moisture content is being added
Under be stirred difficulty, improve dispersibility of the land plaster in unclassified stores.In consideration of it, this researcher is by reality of the invention
The preparation that land plaster prepared by example 1, embodiment 5, embodiment 6 is used for PVC pipe as filler is applied, can be effectively raised
The whiteness of PVC pipe, and in PVC pipe raw material mixed process, it is mixed that dispersion can be effectively carried out with its PVC pipe raw material
It closes, the difficulty during being stirred is significant lower, and detects to the active constituent in mixed material, opposite to pass
The active constituent being added in PVC raw material after the gypsum treatment of system is obviously more excellent, and the dispersion to land plaster in material composition
Degree is tested and analyzed, and is applied to pvc pipe after being substantially better than traditional gypsum calcining grinding with the compatibility of PVC pipe
Material.
Specific embodiment
It is limited below with reference to specific embodiment technical solution of the present invention is further, but claimed
Range is not only limited to made description.Embodiment is that it is of the invention to be not intended to elaboration in order to illustrate implementation of the invention
Technical solution all can covered range.
The raw material that following example 1-6 is chosen is carried out on the basis of removing surface Free water.
Embodiment 1
The natural gypsum of β state is taken, is sent into high pressure flour mill and is ground, obtain Gypsum Fibrosum micropowder, mesh number 600
Mesh, and sieving rate is 93%.
It effectively raises the raw material activity in PVC material, improves as the filler in PVC material production process
The whiteness of PVC material, enhances the toughness of PVC material.
It is added in cement as cement retardative material, can effectively improve the performance of cement, and will not arrive
When dusting, after it will the cement solidifies into test specimen, intensity when detection, intensity is more excellent.
In addition to this, other material modification agent are also used as, it, can also be with such as the modifying agent during rubber production
Raw material is prepared as other products, filler can also be used as to produce soldier-worker product as in military project material product, effectively
Improve the flexibility of product.
Embodiment 2
It is ground using high pressure flour mill, obtains Gypsum Fibrosum micropowder, mesh number is by the ardealite for taking β state
1200 mesh, and sieving rate is 95%.
It effectively raises the raw material activity in PVC material, improves as the filler in PVC material production process
The whiteness of PVC material, enhances the toughness of PVC material.
It is added in cement as cement retardative material, can effectively improve the performance of cement, and will not arrive
When dusting, after it will the cement solidifies into test specimen, intensity when detection, intensity is more excellent.
In addition to this, other material modification agent are also used as, such as the modifying agent during rubber production；It can also incite somebody to action
It is used as filler to produce soldier-worker product as in military project material product, effectively raises the flexibility of product.
Embodiment 3
It is ground using high pressure flour mill, obtains Gypsum Fibrosum micropowder, mesh number by the desulfurized gypsum for taking β state
For 3000 mesh, and sieving rate is 94%.
It effectively raises the raw material activity in PVC material, improves as the filler in PVC material production process
The whiteness of PVC material, enhances the toughness of PVC material.
It is added in cement as cement retardative material, can effectively improve the performance of cement, and will not arrive
When dusting, after it will the cement solidifies into test specimen, intensity when detection, intensity is more excellent.
In addition to this, other material modification agent are also used as, such as the modifying agent during rubber production；It can also incite somebody to action
It is used as filler to produce soldier-worker product as in military project material product, effectively raises the flexibility of product.
Embodiment 4
On the basis of embodiment 1, after being mixed using stearic acid with the natural gypsum of β state, stearic acid additional amount
For account for desulfurized gypsum weight 0.1%, used high pressure flour mill milled processed, obtaining Gypsum Fibrosum micropowder, mesh number 600
Sieving rate when mesh is 95%.
Embodiment 5
On the basis of embodiment 2, after being mixed using paraffin with the ardealite of β state, paraffin additional amount is de- to account for
The 0.05% of sulphur gypsum weight is being used high pressure flour mill milled processed, Gypsum Fibrosum micropowder is obtained, when mesh number is 600 mesh
Sieving rate be 97%.
Embodiment 6
On the basis of embodiment 3, after being mixed using barium cadmium stabilizer with the desulfurized gypsum of β state, barium cadmium is steady
Determining agent additional amount is to account for the 0.01% of desulfurized gypsum weight, then add it to milled processed in high pressure flour mill, obtains gypsum
Micro mist, sieving rate when mesh number is 600 mesh are 95%.
Embodiment 7
The natural gypsum for taking two water states, by it, drying to constant weight under conditions of 60 DEG C, then the material after drying is sent
Enter the powder for being ground into 600 mesh or more in high pressure flour mill, obtains Gypsum Fibrosum micropowder product.
It effectively raises the raw material activity in PVC material, improves as the filler in PVC material production process
The whiteness of PVC material, enhances the toughness of PVC material.
It is added in cement as cement retardative material, can effectively improve the performance of cement, and will not arrive
When dusting, after it will the cement solidifies into test specimen, intensity when detection, intensity is more excellent.
In addition to this, other material modification agent are also used as, such as the modifying agent during rubber production；It can also incite somebody to action
It is used as filler to produce soldier-worker product as in military project material product, effectively raises the flexibility of product.
Embodiment 8
The ardealite for taking two water states, by it under conditions of 90 DEG C, drying to constant weight, then the material after drying is sent into
It is ground into the powder of 1200 mesh or more in high pressure flour mill, obtains ultra-fine Gypsum Fibrosum micropowder product.
It effectively raises the raw material activity in PVC material, improves as the filler in PVC material production process
The whiteness of PVC material, enhances the toughness of PVC material.
It is added in cement as cement retardative material, can effectively improve the performance of cement, and will not arrive
When dusting, after it will the cement solidifies into test specimen, intensity when detection, intensity is more excellent.
In addition to this, other material modification agent are also used as, such as the modifying agent during rubber production；It can also incite somebody to action
It is used as filler to produce soldier-worker product as in military project material product, effectively raises the flexibility of product.
Embodiment 9
The desulfurized gypsum for taking two water states, by it under conditions of 40 DEG C, drying to constant weight, then the material after drying is sent
Enter the powder for being ground into 3000 mesh or more in high pressure flour mill, obtains ultra-fine Gypsum Fibrosum micropowder product.
It effectively raises the raw material activity in PVC material, improves as the filler in PVC material production process
The whiteness of PVC material, enhances the toughness of PVC material.
It is added in cement as cement retardative material, can effectively improve the performance of cement, and will not arrive
When dusting, after it will the cement solidifies into test specimen, intensity when detection, intensity is more excellent.
In addition to this, other material modification agent are also used as, such as the modifying agent during rubber production；It can also incite somebody to action
It is used as filler to produce soldier-worker product as in military project material product, effectively raises the flexibility of product.
Embodiment 10
On the basis of embodiment 7, by the natural gypsum of two water states, drying to constant weight under the conditions of 50 DEG C, then will
Material after drying is mixed with additive, and the dosage of additive is to account for the natural gypsum weight after drying to constant weight
0.03%；Additive is zinc stearate and stearic acid according to arbitrarily than mixed mixture, then is sent to high pressure flour mill
In be ground into 1200 mesh powders, sieving rate 95% obtains gypsum super fine.
Embodiment 11
On the basis of embodiment 8, by the ardealite of two water states, drying to constant weight under the conditions of 70 DEG C, then will drying
Material afterwards is mixed with additive, and the dosage of additive is account for the ardealite weight after drying to constant weight 0.08%；Add
Adding agent is zinc stearate and paraffin according to arbitrarily than mixed mixture, then is sent in high pressure flour mill and is ground into 3000
Mesh powder, sieving rate 95% obtain gypsum super fine.
Embodiment 12
On the basis of embodiment 9, by the desulfurized gypsum of two water states, drying to constant weight under the conditions of 80 DEG C, then will dry
Material after dry is mixed with additive, and the dosage of additive is to account for the desulfurized gypsum weight after drying to constant weight
0.07%；Additive is barium cadmium stabilizer and barium zinc stabilizer according to arbitrarily than mixed mixture, then is sent to high pressure
3000 mesh powders are ground into flour mill, sieving rate 94% obtains gypsum super fine.
In addition to this present invention, on the basis of above-described embodiment 4-6, uses auxiliary material to substitute additive, wherein institute
Stating auxiliary material is one or more of water quenching Phosphorus Slag, water quenching steel slag, water-quenched blast-furnace slag, quick lime.The additive amount of auxiliary material is to account for
The 1-20% of material quality；
In other embodiments, based on the above embodiment on the basis of 10-12, also add it is additivated same
When, it is added with auxiliary material, auxiliary material additive amount accounts for the 1-20% of material quality, wherein the auxiliary material is water quenching Phosphorus Slag, water-hardened steel
One or more of slag, water-quenched blast-furnace slag, quick lime.
Other than the above embodiments, this researcher is also on the basis of above-mentioned elaboration, to research process of the invention
Make the elaboration of following tests step:
Test example 1
The preparation that raw material is carried out according to 10kg bulge test, takes the natural gypsum of two water states, the phosphorus of two water states respectively
Each 30kg of desulfurized gypsum of gypsum, two water states；And above-mentioned various gypsum raw materials are dried to perseverance under conditions of 60 DEG C
Weight, then the gypsum raw material after being respectively dried is placed in high pressure flour mill and is ground, be prepared into respectively 600 mesh Gypsum Fibrosum micropowder and
The ultra-fine Gypsum Fibrosum micropowder product of the ultra-fine Gypsum Fibrosum micropowder of 1200 purposes, 3000 purposes, and be sieved to obtained Gypsum Fibrosum micropowder product
Rate detection, the results are shown in Table 2:
Table 2
By the testing result in table 2 it can be concluded that, after being ground into land plaster in high pressure flour mill, 600 mesh with
On granularity under, corresponding granularity carries out the sieving processing of corresponding sieve pore, and sieving rate is 93% or more.Effectively drop
The difficulty of low Gypsum Fibrosum micropowder preparation.
In addition to this, after the Gypsum Fibrosum micropowder of above-mentioned preparation is also placed in natural environment and prevents 3 days by this researcher, then to it
Sieving rate is detected, and the product of corresponding sieve pore and granularity, sieving rate can still reach 93% or more, it is seen that it is not
It is easy to moisture absorption, there is preferably stability.
Test example 2
Raw material preparation is carried out according to 10kg bulge test, prepares the natural gypsum of β state, the ardealite of β state, β respectively
Raw gypsum is directlyed adopt high pressure flour mill respectively and ground, is prepared into 180 mesh respectively by each 40kg of the desulfurized gypsum of state
Land plaster, 600 mesh Gypsum Fibrosum micropowder, the ultra-fine Gypsum Fibrosum micropowder of 1200 mesh, the ultra-fine Gypsum Fibrosum micropowder of 3000 mesh, detection corresponding product exist
Sieving rate under corresponding granularity；Corresponding land plaster, Gypsum Fibrosum micropowder, ultra-fine Gypsum Fibrosum micropowder product are used into traditional system again
Standby technique is prepared into product, and the flexural strength after 2h is conserved to product detects, and the results are shown in Table 3:
Table 3
| Project | The natural gypsum | Ardealite | Desulfurized gypsum |
| Product fineness | 180 mesh sieving rates 91% | 180 mesh sieving rates 96% | 180 mesh sieving rates 95% |
| 2h flexural strength | 2.1MPa | 2.1MPa | 2.3MPa |
| Product fineness | 600 mesh sieving rates 93% | 600 mesh sieving rates 95% | 600 mesh sieving rates 93% |
| 2h flexural strength | 5.5MPa | 5.6MPa | 5.5MPa |
| Product fineness | 1200 mesh sieving rates 95% | 1200 mesh sieving rates 96% | 1200 mesh sieving rates 95% |
| 2h flexural strength | 6.2MPa | 6.5MPa | 6.3MPa |
| Product fineness | 3000 mesh sieving rates 94% | 3000 mesh sieving rates 95% | 3000 mesh sieving rates 96% |
| 2h flexural strength | 5.8MPa | 6.3MPa | 6.1MPa |
Data in table 3 show it can be seen from as the granularity of Gypsum Fibrosum micropowder becomes smaller, it is anti-after being used in product
Intensity to be rolled over to increase, when 600 mesh compare the granularity of 180 mesh, flexural strength improves 3.2MPa or more, and with granularity
Smaller and smaller, flexural strength is increasing, and 600 mesh are at least 0.7MPa to increase amplitude between 1200 mesh, it is seen then that
The mesh number of Gypsum Fibrosum micropowder is increasing so that after its ultra-fine Gypsum Fibrosum micropowder of formation or after Gypsum Fibrosum micropowder, can effectively improve
The intensity of product improves the performance of product；But it is made according to the common sense of those skilled in the art it is known that being crushed in gypsum
During at powder, it is difficult to be prepared to ultra-fine powder, and then cause the application range of gypsum by limitation.This
Researcher is also based on this, is selected by the processing method to gypsum raw material, so that gypsum raw material is capable of forming micro mist
And super fine, the application range of gypsum is improved, and be ground into the characteristics of being easy to moisture absorption after powder in conjunction with gypsum, by going
After the Free water in gypsum raw material, it is ground into the powder of 600 mesh or more in high pressure flour mill, so that gypsum powder
Stability is enhanced, and is avoided the agglomerating phenomenon of moisture absorption, is promoted the application range of land plaster.
In addition to this, this researcher is also by ultra-fine Gypsum Fibrosum micropowders more than 600 mesh of above-mentioned preparation, Gypsum Fibrosum micropowder application
In the preparation field of high molecular material, and the level of activity for being applied to process is detected, and can effectively promote high score
Reaction in sub- material preparation process goes on, and reduces the activation energy of reaction, improves it in macromolecule material product raw material
Dispersibility.
Test example 3
Raw material preparation is carried out according to 10kg bulge test, prepares the natural gypsum of β state, the ardealite of β state, β respectively
Each 40kg of the desulfurized gypsum of state；In addition preparing additive 10kg, using stearic acid as additive.
It is calculated according to 0.05% that stearic acid adding proportion is gypsum weight of material, respectively by the natural gypsum of β state, β
After the ardealite of state, the desulfurized gypsum of β state are mixed with stearic acid additive, it is added in high pressure flour mill and grinds, be prepared into
The land plaster of 180 mesh, the Gypsum Fibrosum micropowder of 600 mesh, the ultra-fine Gypsum Fibrosum micropowder of 1200 purposes, the ultra-fine Gypsum Fibrosum micropowder of 3000 purposes, and it is right
The sieving rate that the sieve pore that corresponding product corresponds to granularity carries out sieving processing is detected, and the result is shown in shown in table 4:
Table 4
| Project | The natural gypsum | Ardealite | Desulfurized gypsum |
| Product fineness | 180 mesh sieving rates 91% | 180 mesh sieving rates 96% | 180 mesh sieving rates 95% |
| Product fineness | 600 mesh sieving rates 95% | 600 mesh sieving rates 97% | 600 mesh sieving rates 95% |
| Product fineness | 1200 mesh sieving rates 95% | 1200 mesh sieving rates 94% | 1200 mesh sieving rates 94% |
| Product fineness | 3000 mesh sieving rates 93% | 3000 mesh sieving rates 95% | 3000 mesh sieving rates 94% |
It can be seen from data display result in table 4 after its Gypsum Fibrosum micropowder for being ground into 600 mesh or more, sieving rate
It is 94% or more；It shows in conjunction with the data of table 2, table 3, after the addition of the additives, can effectively reduce in process of lapping
Difficulty, it is ensured that the granularity in material after grinding is thinner, can be improved the quality of Gypsum Fibrosum micropowder, and make preparation stone
The flexural strength of cream micro mist is further improved.
In addition to this, the various products that above-mentioned test example 3 obtains also are placed in natural environment and place one by this researcher
A week, then the detection of sieving rate is carried out to it, it is seen that its sieving rate still maintains 94% or more, and the performance of product is steady
Fixed, hygroscopicity is weaker, is not susceptible to clustering phenomena, dispersibility with higher.
The performance of product in order to ensure is more stable, and the present invention is by the natural gypsum in one embodiment
And/or industry by-product gypsum is prepared into mesh number more than 600 mesh as raw material, and by after Free water therein removing
Gypsum Fibrosum micropowder, the Gypsum Fibrosum micropowder can effectively improve intensity, and activity with higher and dispersibility.Implement in other
In example, in order to more improve the performance of Gypsum Fibrosum micropowder and/or ultra-fine Gypsum Fibrosum micropowder, improves its stability, grinding
Mill is prepared into before micro mist, and the gypsum material for removing Free water is mixed with additive, so that additive blocks gypsum table
Acting on the hydrone in environment for face, avoids gypsum powder clustering phenomena, improves the stability and dispersibility of Gypsum Fibrosum micropowder.
In certain embodiments, Free water is removed using under conditions of 60 DEG C；Avoid the structure of the crystallization water
The situation largely damaged and removed, so that containing a certain amount of crystallization water in the Gypsum Fibrosum micropowder of preparation, while but also powder
Stablize at the performance of Gypsum Fibrosum micropowders more than 600 mesh at end.
In certain embodiments, the gypsum raw material used can also be α-gypsum, anhydrous gypsum；The industrial by-product of use
Gypsum is one of ardealite, desulfurized gypsum, fluorgypsum etc..The additive used in certain embodiments is stearic acid, hard
One of resin acid salt, paraffin, barium cadmium stabilizer, barium zinc stabilizer.The additive used in certain embodiments is tristearin
Any mixture of acid, stearate, paraffin, barium cadmium stabilizer, barium zinc stabilizer, if stearic acid and stearate are arbitrarily than mixed
The mixture of conjunction；As stearic acid and any of at least one of paraffin, barium cadmium stabilizer, barium zinc stabilizer compare mixture；Such as stone
Wax is any than mixture etc. at least one of barium cadmium stabilizer, barium zinc stabilizer.
In order to better illustrate the characteristic and application of Gypsum Fibrosum micropowder of the invention, researcher of the invention also sends out this
The Gypsum Fibrosum micropowder and/or ultra-fine Gypsum Fibrosum micropowder that bright technical solution obtains are applied to be used as filler or modifying agent, example in product
Such as applied to filler is used as in the production of PVC pipe, filler is used as applied in PP material；In addition to this it is possible to using
In military project material product, improves the toughness of military project material, improve the performance of product.
The present invention is more most important to be, in certain embodiments, be by the natural gypsum and industry by-product gypsum into
After any ratio mixing of row, after being removed Free water, it is prepared into the micro mist more than or equal to 600 mesh, so that carrying out
During gypsum storage, the difficulty of storage is smaller, will not fear that the moisture in certain gypsum raw materials is lower, certain gypsum raw materials
In moisture content it is higher, carried out separate storage or transport, reduce being processed into for the gypsum in phosphoric acid by wet process industry
This.Specifically in certain embodiments, it is by ardealite and desulfurized gypsum, ardealite and fluorgypsum, desulfurized gypsum and fluorgypsum, takes off
Sulphur gypsum and natural gypsum etc. mixed after as gypsum raw material.It in other embodiments, is by dihydrate gypsum, α-stone
Cream, β-gypsum, anhydrous gypsum mutually prepare stone as gypsum raw material between any two or between three or three or after four kinds of mixing
Cream micro mist.And in mixed process, mutual modification can be reached, the performance in the gypsum of various forms is mutually made up,
The performance for improving Gypsum Fibrosum micropowder, improves the intensity and activity of Gypsum Fibrosum micropowder, improves the stabilization of Gypsum Fibrosum micropowder and/ultra-fine Gypsum Fibrosum micropowder
Property.
Gypsum Fibrosum micropowder prepared by the present invention and/or ultra-fine Gypsum Fibrosum micropowder can be as the activity in certain formulation process
Agent.
It should be noted that understanding: technical solution of the present invention is not by the limitation of above description.Without departing substantially from being invented
Spirit and the scope of the present invention on the basis of, foregoing description can be modified, it is any it is above-mentioned only make do not have
There is the modification of essential characteristics outstanding and marked improvement, belongs to protection category of the invention；And it should be understood that
During the discussion of range, the possible any characteristic range point not explicitly disclosed but falling in range of the present invention should be considered
For the endpoint of calcium protection scope, the protection scope provided should be determined by allowed by law explanation width.
Claims (6)
1. a kind of high-strength composite Gypsum Fibrosum micropowder preparation method, which is characterized in that with the natural gypsum, industry by-product gypsum at least one
Kind is raw material, sloughs Free water, mesh number >=600 mesh micro mist, sieving rate >=90% is made；The Free water of sloughing is by day
Right gypsum and/or industry by-product gypsum are using 40-90 DEG C of drying and processing to constant weight；The micro mist adds in its preparation process
Enter additive and/or auxiliary material mixed processing, obtains active micro mist；The additive is that can block outside water molecule and micro mist
In conjunction with, avoid forming Free water in micro mist, improve micro mist activity and thermal stability substance；The additive is tristearin
Any mixture of one or more of acid, stearate, paraffin, barium cadmium stabilizer, barium zinc stabilizer；The auxiliary material is
One or more of water quenching Phosphorus Slag, water quenching steel slag, water-quenched blast-furnace slag, quick lime arbitrarily mix；The additive addition
Amount is the 0.01-0.5% for accounting for material quality；The auxiliary material additive amount is the 1-20% for accounting for material quality.
2. high-strength composite Gypsum Fibrosum micropowder preparation method as described in claim 1, which is characterized in that the stearate is
At least one of calcium stearate, magnesium stearate.
3. high-strength composite Gypsum Fibrosum micropowder preparation method as described in claim 1, which is characterized in that described sloughs Free water
It is by the natural gypsum and/or industry by-product gypsum using 60 DEG C of drying and processings to constant weight.
4. high-strength composite Gypsum Fibrosum micropowder preparation method as described in claim 1, which is characterized in that the micro mist, be
After sloughing Free water, its ball milling is prepared, being milled to specific surface area is 350-900m2/kg。
5. the Gypsum Fibrosum micropowder of high-strength composite Gypsum Fibrosum micropowder preparation method production according to any one of claims 1-4 is answered
With, which is characterized in that the Gypsum Fibrosum micropowder can be used as the modifying agent of military project material product, filler material.
6. the Gypsum Fibrosum micropowder of high-strength composite Gypsum Fibrosum micropowder preparation method production according to any one of claims 1-4, special
Sign is that fineness is the micro mist of >=600 mesh, sieving rate >=90%.
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| CN111825421A (en) * | 2020-07-29 | 2020-10-27 | 襄阳市政建设集团有限公司 | Preparation method of active phosphogypsum micro powder based on heat insulation material |
| CN111875273A (en) * | 2020-08-13 | 2020-11-03 | 江苏一夫科技股份有限公司 | High-strength gypsum cementing material based on anhydrite and desulfurized beta powder and preparation method thereof |
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