CN106365476B - A kind of method that desulfurized gypsum prepares sulphate aluminium cement co-producing sulfuric acid - Google Patents
A kind of method that desulfurized gypsum prepares sulphate aluminium cement co-producing sulfuric acid Download PDFInfo
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- CN106365476B CN106365476B CN201610841812.8A CN201610841812A CN106365476B CN 106365476 B CN106365476 B CN 106365476B CN 201610841812 A CN201610841812 A CN 201610841812A CN 106365476 B CN106365476 B CN 106365476B
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- sulphate aluminium
- cement
- desulfurized gypsum
- sulfuric acid
- gypsum
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- 239000010440 gypsum Substances 0.000 title claims abstract description 91
- 239000004568 cement Substances 0.000 title claims abstract description 90
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 89
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000004411 aluminium Substances 0.000 title claims abstract description 54
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 54
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 53
- 229910021653 sulphate ion Inorganic materials 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000002360 preparation method Methods 0.000 claims abstract description 21
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 18
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 17
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003830 anthracite Substances 0.000 claims abstract description 14
- 238000001354 calcination Methods 0.000 claims abstract description 14
- 239000004615 ingredient Substances 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 5
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 5
- 235000011128 aluminium sulphate Nutrition 0.000 claims description 5
- 238000010348 incorporation Methods 0.000 claims description 2
- 235000019738 Limestone Nutrition 0.000 abstract description 10
- 239000006028 limestone Substances 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000011056 performance test Methods 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 20
- 239000007789 gas Substances 0.000 description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 239000005864 Sulphur Substances 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 241000533901 Narcissus papyraceus Species 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- 235000012241 calcium silicate Nutrition 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- 238000004131 Bayer process Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000002742 anti-folding effect Effects 0.000 description 1
- GJYLKIZKRHDRER-UHFFFAOYSA-N calcium;sulfuric acid Chemical compound [Ca].OS(O)(=O)=O GJYLKIZKRHDRER-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Treating Waste Gases (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of method that desulfurized gypsum prepares sulphate aluminium cement co-producing sulfuric acid, this method replaces lime stone and the natural gypsum with desulfurized gypsum completely, carries out ingredient through bauxite, silica, anthracite, sulphate aluminium cement is made after calcining.The method of the present invention can increase substantially desulfurized gypsum utilization rate, and the sulphoaluminate cement clinker setting rate that the SO 2 tail gas of higher concentration can prepare sulfuric acid preparation by absorption is fast, early period, intensity was high and later strength also promotes stabilization, performance test shows that the mechanical strength of the sulphate aluminium cement of the method for the present invention preparation meets quick hardening sulphoaluminate cement standard.
Description
Technical field
The present invention relates to a kind of methods that desulfurized gypsum prepares sulphate aluminium cement co-producing sulfuric acid, belong to the skill of cement preparation
Art field.
Background technique
It is also higher and higher to the technical requirements of special cement with the modernization of engineering technology.Including special engineering
There is special requirement to the speed of rapid condensation and hardening and each phase hardness when construction, such as the connection construction of cement pipeline,
The construction etc. of the Foundation Fieldbus field of Large-Scale Equipment.Although however using the continuous expansion with selling market but because of the higher cost of product
And be restricted, so that more users is unable to reach.On the other hand, the predominantly wet desulphurization of China's flue gas desulfurization technique
Technique, the consequence that this limestone-gypsum method wet desulfurizing process generates is exactly desulfurized gypsum (CaSO42H2O) a large amount of heaps
It puts, decompose and cause secondary pollution, harm is brought to weather, soil, plant and human health.In addition, many Production in Chemical Plant
The long-standing abuse already of by-product gypsum in the process is to suffer from；How sulphate aluminium cement is effectively prepared using by-product desulfurized gypsum,
Through one of the hot spot for becoming domestic and international researcher research.
Chinese patent literature CN103979810A discloses a kind of comprehensive utilization paper white sludge, bauxite and desulfurized gypsum system
The method of standby sulphoaluminate cement clinker, this technique use paper white sludge, bauxite and desulfurized gypsum for raw material, in electric furnace with
20~30 DEG C/min heating rate keeps the temperature 1.5-2.5h and obtains to 1200-1300 DEG C；Taking-up is chilled to room temperature, by clinker grinding
Carefully to 400m2/kg to get required product；The formula of the aluminium sulfate raw material are as follows: paper white sludge 40wt%-50wt%, aluminium
Alumina 35wt%-45wt%, remaining be desulfurized gypsum, this method cleverly utilizes two kinds of solid wastes of paper white sludge and desulfurized gypsum to be
Primary raw material prepares sulphate aluminium cement, can not only efficiently use solid waste, can also reduce the cost of aluminium sulfate, but technique
The usage amount of middle desulfurized gypsum only accounts for the 5-25% of raw-meal ingredient, and desulfurized gypsum utilization rate is lower, and calcines in invention de-
Sulphur gypsum can generate sulfur dioxide, it is improper conduct oneself well to comprehend cause environmental pollution.
Chinese patent literature CN103964713A, which is disclosed, utilizes flyash and Bayer process red mud preparation belite sulphur aluminic acid
The method of salt cement, raw material is made of lime stone, flyash, Bayer process red mud, desulfurized gypsum, bauxite in the method, will be former
Material point drying is crushed, tabletting after grinding, and then raw material test block is put into Muffle furnace, calcines at 1250~1300 DEG C, is kept the temperature
After 0.5~1 hour, clinker is taken out, chilling obtains belite sulphoaluminate cement clinker.But the dosage of desulfurized gypsum in the method
Only 10% or so, and there is still a need for a large amount of lime stone, the sulfur dioxide contained in gained tail gas, it is improper conduct oneself well to comprehend cause environment
Pollution.
It is retrieved, has no that full utilization desulfurized gypsum preparation setting rate is fast, early period, intensity was high and later strength is also promoted
Stablize the report of sulphate aluminium cement.
Summary of the invention
The problem of for the preparation of current sulphate aluminium cement, the present invention provides a kind of desulfurized gypsum and prepares sulphur aluminic acid
The method of salt cement co-producing sulfuric acid, this method is fully utilized desulfurized gypsum and replaces the natural gypsum and lime stone, and can pass through recycling
Tail gas co-producing sulfuric acid, and process route is simple, production cost is low, has good economy and environmental benefit.
Summary of the invention:
The present invention is using desulfurized gypsum, bauxite, silica, anthracite as raw material, the high-temperature calcination after ingredient, grinding, homogenizing
Clinker is made, gained clinker can add the natural gypsum or lime stone prepares different types of sulphate aluminium cement, can not also be additional
The natural gypsum directly obtains sulphate aluminium cement.
Detailed description of the invention:
A kind of method that desulfurized gypsum prepares sulphate aluminium cement co-producing sulfuric acid, comprises the following steps that
A. the preparation of cement slurry:
By following mass parts carry out ingredient: desulfurized gypsum be 63-78 parts, 20-32 parts of bauxite, 1-3 parts of silica, anthracite
3-4 parts；Each component is mixed, grinding, cement slurry is obtained after homogenizing；
B. the preparation of clinker:
By cement slurry made from step a in 1250~1300 DEG C, calcines 30-40 minutes, obtain clinker, it is calcined
The SO 2 tail gas generated in journey is sent into sulfuric acid preparation system after collecting, and prepares sulfuric acid；
C. the preparation of sulphate aluminium cement:
The clinker that step b is obtained regrinds to get sulphate aluminium cement.
It is currently preferred:
Fineness is 120-180 mesh after material grinding in step a；
Al in the bauxite2O3Mass fraction is 50-60%, further preferred 55%；
The desulfurized gypsum is half water desulfurized gypsum.The desulfurized gypsum can also be the natural gypsum, desulfurized gypsum
And fluorgypsum.
Cement slurry material quality part is as follows in step a: desulfurized gypsum be 70-75 parts, 20-24 parts of bauxite, silica 1-2
Part, 3-4 parts of anthracite.
It is currently preferred:
Calcining described in step b carries out in rotary kiln, shaft kiln or tunnel oven, carries out in further preferred rotary kiln.
Preferably 1280~1300 DEG C of calcination temperature in step b, calcination time 35-40 minutes.
The clinker that step b is obtained can add the natural gypsum as requested, and different types of sulphate aluminium cement is made.
The amount of allocating of the natural gypsum calculates as follows:
CG=0.13*M*AC/S
CG--- the mass fraction (ratio of the natural gypsum and clinker) of natural gypsum incorporation, if clinker is 1；
AC--- in clinkerMass fraction；
S --- SO in the natural gypsum3Mass fraction；
M --- natural gypsum coefficient, natural gypsum dosage is different in different sulphate aluminium cements, and M value is different, M value
Range is between 0-4.
The value of different types of sulphate aluminium cement M is as follows:
When M value: early strong, high-strength sulphate aluminium cement is made in 0-1；When M value: intumescent sulphur aluminic acid is made in 1-2
Salt cement；When M value: seif-citing rate type sulphate aluminium cement is made in 2-4；When M value: low alkalinity type sulphur aluminium is made in 2.5-3.0
Acid salt cement.
It is currently preferred:
It is 300~400m that clinker, which is ground to specific surface area, in step c2/ kg, further preferred 350m2/kg.Using ball
Grinding machine carries out.
Above-mentioned SO 2 tail gas collection prepares the process of sulfuric acid, by the prior art.
The cement slurry that the present invention is made of desulfurized gypsum, bauxite, silica, anthracite high temperature after grinding, homogenizing
The sulphate aluminium cement obtained after calcining, performance test show the power of the sulphate aluminium cement prepared using method of the invention
It learns intensity and meets quick hardening sulphoaluminate cement standard, clinker setting rate is fast, and early period, intensity was high and later strength also promotes stabilization,
By adjusting cement raw mix proportioning mode, the natural gypsum is substituted completely with desulfurized gypsum and lime stone (is taken by calcium sulfate completely
For calcium carbonate), the sulfuric acid calcium reduction in desulfurized gypsum is generated by sulfur dioxide and calcium oxide, sulfur dioxide warp by anthracite
Sulfuric acid product is made in oxidative absorption, and sulphur aluminic acid is made through high temperature sintering in calcium oxide, bauxite and the unreduced calcium sulfate of generation
Salt cement；
Cement slurry is in high-temperature burning process, and most of desulfurized gypsum is decomposed under anthracite effect, resolution ratio
For 70-85%, wherein the addition of silica can form dicalcium silicate with calcium oxide, improve the later period performance of cement, reach early period
The high later strength of intensity promotes stable double effects, and the calcium sulfate for participating in decomposition reaction, which decomposes generation calcium oxide, all to be replaced
Lime stone, the concentration of SO 2 gas for decomposing generation is 7-9%, can be used for producing sulfuric acid；Remaining undecomposed desulfurized gypsum
After high-temperature calcination, it is converted into high temperature gypsum, the outer natural gypsum added needed for alternative clinker product.
Main chemical reactions of the present invention are as follows:
Heretofore described desulfurized gypsum refers in the solid slag that limestone-gypsum method wet desulfurizing process generates, no
The desulfurized gypsum obtained with technique is used equally for the present invention.
The invention has the following advantages:
1, compared to the method that other prepare sulphate aluminium cement using desulfurized gypsum, desulfurized gypsum can replace completely in the present invention
Clinkersintering is carried out for lime stone and the natural gypsum, the utilization rate of desulfurized gypsum is greatly improved, realizes desulfurized gypsum resource
Change and utilize, and effectively reduces the cost of sulphate aluminium cement.
2, the decomposition reaction that anthracite promotes most of calcium sulfate in desulfurized gypsum, undecomposed desulfurization are added in raw material
The sulphate component that gypsum a part is formed as calcium sulphoaluminate in cement clinker mineral, another part can be used to replace cement ripe
The outer natural dihydrate gypsum component mixed of material, can directly produce sulphate aluminium cement.
3. substituting the natural gypsum and lime stone completely with desulfurized gypsum (i.e. by sulphur due to not using lime stone in ingredient
Sour calcium is completely instead of calcium carbonate), so desulfurized gypsum decomposes the concentration of SO 2 gas height generated, acid making system can be met
Requirement to sulfur dioxide concentration avoids the pollution problem of sulfur dioxide.
4. the composite can be widely applied to produce different types of aluminium sulfate water such as fast hard, high-strength, expansion, low alkalinity
Mud.
Specific embodiment
Essence in order to better understand the present invention, below with reference to embodiment, the content of the present invention will be further explained,
But limitation of the present invention cannot be considered as.
Desulfurized gypsum in each embodiment is half water desulfurized gypsum after airflow drying, and main component is shown in Table 1, bauxite
It is derived from Guizhou, main component is shown in Table 2, and the main component of silica is shown in Table 3.
Table 1: the main component and content of desulfurized gypsum
| Component | CaO | SO3 | Fe2O3 | Al2O3 | SiO2 |
| Content % | 37.86 | 52.63 | 0.45 | 1.06 | 0.93 |
Table 2: the main composition and content of bauxite
| Component | CaO | Fe2O3 | SiO2 | Al2O3 | SO3 |
| Content % | 3.84 | 9.86 | 21.28 | 55.45 | / |
Table 3: the main component and content of silica
| Component | CaO | Fe2O3 | SiO2 | Al2O3 | SO3 |
| Content % | 7.85 | 1.24 | 78.67 | 0.82 | / |
Embodiment 1:
According to following mass fraction progress ingredient: 63 parts of desulfurized gypsum, 32 parts of bauxite, 2 parts of silica, 3 parts of anthracite；Again
It is 120 mesh that each component grinding, which is mixed to fineness, obtains cement slurry；The cement slurry prepared is placed in rotary kiln
It is calcined 30 minutes at 1300 DEG C, obtains clinker, the tail gas after calcining containing sulfur dioxide send sulfuric acid preparation system to prepare sulfuric acid；
The clinker of firing is regrind to 350m2After/Kg, sulphate aluminium cement product, gained sulphate aluminium cement can be obtained
Mechanical property be shown in Table 4.
Embodiment 2:
According to following mass fraction progress ingredient: 67 parts of desulfurized gypsum, 28 parts of bauxite, 2 parts of silica, 3 parts of anthracite；Again
It is 150 mesh that each component grinding, which is mixed to fineness, obtains cement slurry；The cement slurry prepared is placed in rotary kiln
It is calcined 30 minutes at 1300 DEG C, obtains clinker, the tail gas after calcining containing sulfur dioxide send sulfuric acid preparation system to prepare sulfuric acid；
The clinker of firing is regrind to 350m2After/Kg, sulphate aluminium cement product, gained sulphate aluminium cement can be obtained
Mechanical property be shown in Table 4.
Embodiment 3:
According to following mass fraction progress ingredient: 71 parts of desulfurized gypsum, 22 parts of bauxite, 3 parts of silica, 4 parts of anthracite；Again
It is 180 mesh that each component grinding, which is mixed to fineness, obtains cement slurry；The cement slurry prepared is placed in rotary kiln
It is calcined 30 minutes at 1300 DEG C, obtains clinker, the tail gas after calcining containing sulfur dioxide send sulfuric acid preparation system to prepare sulfuric acid,
The clinker of firing is regrind to 350m2After/Kg, sulphate aluminium cement product, gained sulphate aluminium cement can be obtained
Mechanical property be shown in Table 4.
Embodiment 4:
According to following mass fraction progress ingredient: 78 parts of desulfurized gypsum, 20 parts of bauxite, 1 part of silica, 4 parts of anthracite；Again
It is 180 mesh that each component grinding, which is mixed to fineness, obtains cement slurry；The cement slurry prepared is placed in rotary kiln
It is calcined 30 minutes at 1300 DEG C, obtains clinker, the tail gas after calcining containing sulfur dioxide send sulfuric acid preparation system to prepare sulfuric acid,
The clinker of firing is regrind to 350m2After/Kg, sulphate aluminium cement product, gained sulphate aluminium cement can be obtained
Mechanical property be shown in Table 4.
Table 4: sulphate aluminium cement glue sand mechanical property
Sulphate aluminium cement glue sand mechanical property performance, the data from table 4 are measured by using resistance to compression, anti-folding means of testing
It is found that sulphate aluminium cement produced by the present invention reaches 30~50MPa in 1d intensity, it can be seen that early period high, the hardening speed of intensity
Degree is fast, and the intensity of 28d reaches 45~67MPa, and later strength is promoted, the mechanics of the sulphate aluminium cement of method sintering of the invention
Performance meets the standard of the sulphate aluminium cement in GB20472-2006.
The above is only the preferred embodiment of the present invention, it is noted that above embodiment is not construed as to this hair
Bright limitation, protection scope of the present invention should be defined by the scope defined by the claims., for the common of the art
For technical staff, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, also should be regarded as this
The protection scope of invention.
Claims (7)
1. a kind of method that desulfurized gypsum prepares sulphate aluminium cement co-producing sulfuric acid, comprises the following steps that
A. the preparation of cement slurry:
By following mass parts carry out ingredient: desulfurized gypsum be 70-75 parts, 20-24 parts of bauxite, 1-2 parts of silica, anthracite 3-4
Part；Each component is mixed, grinding, fineness is 120-180 mesh after material grinding, obtains cement slurry after homogenizing；Desulfurized gypsum is half
Water desulfurized gypsum；
B. the preparation of clinker:
It by cement slurry made from step a in 1250 ~ 1300 DEG C, calcines 30-40 minutes, obtains clinker, in calcination process
The SO 2 tail gas of generation is sent into sulfuric acid preparation system after collecting, and prepares sulfuric acid；
C. the preparation of sulphate aluminium cement:
The clinker that step b is obtained regrinds to get sulphate aluminium cement.
2. the method that desulfurized gypsum according to claim 1 prepares sulphate aluminium cement co-producing sulfuric acid, which is characterized in that institute
Al in the bauxite stated2O3Mass fraction is 50-60%.
3. the method that desulfurized gypsum according to claim 1 prepares sulphate aluminium cement co-producing sulfuric acid, which is characterized in that step
Calcining described in rapid b carries out in rotary kiln, shaft kiln or tunnel oven.
4. the method that desulfurized gypsum according to claim 1 prepares sulphate aluminium cement co-producing sulfuric acid, which is characterized in that step
Calcination temperature is 1280 ~ 1300 DEG C, calcination time 35-40 minutes in rapid b.
5. the method that desulfurized gypsum according to claim 1 prepares sulphate aluminium cement co-producing sulfuric acid, which is characterized in that step
It is 300~400m that clinker, which is ground to specific surface area, in rapid c2/ kg is carried out using ball mill.
6. a kind of method that desulfurized gypsum prepares different types of sulphate aluminium cement co-producing sulfuric acid, comprises the following steps that
A. the preparation of cement slurry:
By following mass parts carry out ingredient: desulfurized gypsum be 70-75 parts, 20-24 parts of bauxite, 1-2 parts of silica, anthracite 3-4
Part；Each component is mixed, grinding, fineness is 120-180 mesh after material grinding, obtains cement slurry after homogenizing；Desulfurized gypsum is half
Water desulfurized gypsum；
B. the preparation of clinker:
It by cement slurry made from step a in 1250 ~ 1300 DEG C, calcines 30-40 minutes, obtains clinker, in calcination process
The SO 2 tail gas of generation is sent into sulfuric acid preparation system after collecting, and prepares sulfuric acid；
Obtained clinker is added into the natural gypsum as requested, different types of sulphate aluminium cement is made；
The amount of allocating of the natural gypsum calculates as follows:
CG=0.13*M*AC/S
CG--- the mass fraction of natural gypsum incorporation, the ratio of the natural gypsum and clinker, if clinker is 1；
AC--- in clinkerMass fraction；
S --- SO in the natural gypsum3Mass fraction；
M --- natural gypsum coefficient, natural gypsum dosage is different in different sulphate aluminium cements, and M value is different, M value range
Between 0-4.
7. the method that desulfurized gypsum according to claim 6 prepares different types of sulphate aluminium cement co-producing sulfuric acid,
It is characterized in that, the value of different types of sulphate aluminium cement M is as follows:
When M value: early strong, high-strength sulphate aluminium cement is made in 0-1；When M value: intumescent aluminium sulfate water is made in 1-2
Mud；When M value: seif-citing rate type sulphate aluminium cement is made in 2-4；When M value: low alkalinity type aluminium sulfate is made in 2.5-3.0
Cement.
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| CN101921548A (en) * | 2009-06-10 | 2010-12-22 | 同济大学 | Method for preparing quick-hardened cement-based adhesive by utilizing refuse-incinerated fly ash |
| CN102515115A (en) * | 2011-12-29 | 2012-06-27 | 刘立文 | Method for preparing sulfuric acid and cement by using desulfurized gypsum |
| CN103482584A (en) * | 2012-06-15 | 2014-01-01 | 南京理工大学 | Production technology for preparing calcium oxide and sulfur dioxide through utilizing desulfurized gypsum |
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| CN102515115A (en) * | 2011-12-29 | 2012-06-27 | 刘立文 | Method for preparing sulfuric acid and cement by using desulfurized gypsum |
| CN103482584A (en) * | 2012-06-15 | 2014-01-01 | 南京理工大学 | Production technology for preparing calcium oxide and sulfur dioxide through utilizing desulfurized gypsum |
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