CN107777983A - Gypsum and its production method - Google Patents
Gypsum and its production method Download PDFInfo
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- CN107777983A CN107777983A CN201710944157.3A CN201710944157A CN107777983A CN 107777983 A CN107777983 A CN 107777983A CN 201710944157 A CN201710944157 A CN 201710944157A CN 107777983 A CN107777983 A CN 107777983A
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- 239000010440 gypsum Substances 0.000 title claims abstract description 50
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052809 inorganic oxide Inorganic materials 0.000 claims abstract description 40
- 239000003546 flue gas Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 33
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000000779 smoke Substances 0.000 claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 claims abstract description 26
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 24
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 24
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 24
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 24
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 24
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 24
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 24
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 18
- 230000023556 desulfurization Effects 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 18
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 15
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000292 calcium oxide Substances 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 11
- QPLDLSVMHZLSFG-UHFFFAOYSA-N CuO Inorganic materials [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 10
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000010842 industrial wastewater Substances 0.000 claims abstract description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 14
- 239000000654 additive Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 7
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 claims description 3
- 229940092714 benzenesulfonic acid Drugs 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 229920005610 lignin Polymers 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 239000002910 solid waste Substances 0.000 abstract description 8
- 230000010354 integration Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000002893 slag Substances 0.000 description 8
- 239000002351 wastewater Substances 0.000 description 7
- 239000004566 building material Substances 0.000 description 6
- 230000003009 desulfurizing effect Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000011507 gypsum plaster Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000003643 water by type 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/062—Purification products of smoke, fume or exhaust-gases
- C04B18/064—Gypsum
-
- 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
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/50—Combinations of absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of gypsum and its production method.This method includes：(1) dry desulfurization is carried out to flue gas using the smoke absorption agent of dry powder-shaped, so as to form accessory substance；The smoke absorption agent includes 10~25 parts by weight nano inorganic oxides, 10~25 parts by weight micron inorganic oxides, 10~25 parts by weight magnesia and 20~35 parts by weight calcium oxide；Wherein, described nano inorganic oxide is selected from SiO2、Fe2O3、Al2O3, CuO and MnO2In one or more, described micron inorganic oxide is selected from SiO2、Fe2O3、Al2O3, CuO and MnO2In one or more；(2) material comprising the accessory substance, diatomite, talcum powder and binding agent is well mixed and obtains siccative, and the water is mixed with siccative, then pouring molding obtains the gypsum.The present invention can avoid producing excessive industrial wastewater, and can realize that flue gas desulfurization, solid waste integration are administered, and can also obtain qualified gypsum.
Description
Technical field
The present invention relates to a kind of gypsum and its production method, it is especially a kind of based on dry flue gas desulphurization production gypsum and
Its method.
Background technology
Building materials of gypsum refer to gypsum plaster ceiling board, gypsum putty, extraordinary mortar, brushing gypsum, gypsum wallboard, mould gypsum,
Gypsum block etc. is using plaster of Paris as construction material made of raw material.Building materials of gypsum has the spy such as safety, comfortable, quick, environmental protection
Point, its development space is big, prospect is good.
Not only performance is good for building materials of gypsum, and green building material.Abroad, than wide, Europe is built for the utilization of building materials of gypsum
Make it is a kind of be suitable for less than 8 layers, modular light construction system, belong to modular and build a house, first with steel framework in work
Ground builds building structure, is linked with rivet, and the sheet material manufactured in factory then is transported into building site assembling, the building four of three canopy one
Floor room.Interior wall is heat-insulated, the warming plate for having a variety of colors, and exterior wall has rain-proof water-proof sheet material.In European concrete structure
Through seldom, after having thermal insulation technology, individual layer wall is just substituted by double wall, wherein accounting for using interior Thermo Isolation Technique
96% accounts for 1% using outer Thermo Isolation Technique, and 3% is accounted for using from Thermo Isolation Technique, and this is a large amount of wide using providing of plasterboard
General chance.
According to the sulfur content of China's electricity coal, byproduct-desulphurization denitration gypsum of nearly hundred million tons of desulfurization is discharged every year.Wet method takes off
Dihydrate gypsum in sulphur gypsum can be changed into semi-hydrated gypsum after calcining, so as to have gelling.The bulk deposition of gypsum
Secondary pollution is caused to environment.The step for dry desulfurization gypsum can then be reduced, reduce energy consumption, while dry desulfurization denitration
The influence to haze can also be avoided.
The content of the invention
It is an object of the present invention to provide a kind of production method of gypsum, and it can avoid producing excessive Industry Waste
Water, and can realize that flue gas desulfurization, solid waste integration are administered, qualified gypsum can also be obtained.
It is another object of the present invention to provide a kind of gypsum, its performance meets to require, and makes full use of Industrial Solid
Body waste.
The present invention provides a kind of production method of gypsum, comprises the following steps：
(1) dry desulfurization is carried out to flue gas using the smoke absorption agent of dry powder-shaped, so as to form accessory substance；The flue gas is inhaled
Receiving agent includes 10~25 parts by weight nano inorganic oxides, 10~25 parts by weight micron inorganic oxides, 10~25 parts by weight oxygen
Change magnesium and 20~35 parts by weight calcium oxide；Wherein, described nano inorganic oxide is selected from SiO2、Fe2O3、Al2O3, CuO and
MnO2In one or more, described micron inorganic oxide is selected from SiO2、Fe2O3、Al2O3, CuO and MnO2In one kind or
It is a variety of；
(2) material comprising the accessory substance, diatomite, talcum powder and binding agent is well mixed and obtains siccative, and will
Water mixes with the siccative, and then pouring molding obtains the gypsum.
Method in accordance with the invention it is preferred that during the dry desulfurization of step (1), the sulfur dioxide of the flue gas
Content is 300~40000mg/Nm3, oxygen content be 10~18vol%, flue gas flow rate is 2~5m/s and temperature be 110~
200℃。
Method in accordance with the invention it is preferred that in step (1), the smoke absorption agent includes 15~23 parts by weight nanometers
Inorganic oxide, 15~23 parts by weight micron inorganic oxides, 20~25 parts by weight magnesia and 22~35 parts by weight calcium oxide.
Method in accordance with the invention it is preferred that in step (1), described nano inorganic oxide includes SiO2、Al2O3With
MnO2；Described micron inorganic oxide includes SiO2、Al2O3And MnO2。
Method in accordance with the invention it is preferred that in described nano inorganic oxide, SiO2、Al2O3And MnO2Weight
Amount is than being 3~8:5~10:5~10；In described micron inorganic oxide, SiO2、Al2O3And MnO2Weight ratio for 3~
8:5~10:5~10.
Method in accordance with the invention it is preferred that in step (2), the material include 40~80 parts by weight, 25~
35 parts by weight diatomite, 5~10 parts by weight talcum powder and 1~10 parts by weight binder.
Method in accordance with the invention it is preferred that one kind in cement, magnesium sulfate or magnesia of the binding agent or
Kind.
Method in accordance with the invention it is preferred that described material also includes 5~10 parts by weight additives；The additive
Selected from least one of lignin water reducer, naphthalene sulfonic acids water reducer, benzene sulfonic acid water reducer or polycarboxylate water-reducer.
Method in accordance with the invention it is preferred that the weight of water and siccative ratio is 0.2~0.5, described water is that pH is more than 5
Industrial wastewater.
The present invention also provides a kind of gypsum, and it is prepared by any of the above-described method.
The present invention is by flue gas dry desulfurizing technique and building materials of gypsum production technology perfect adaptation so that the two synchronous progress.
Present invention eliminates the calcination link during desulfurated plaster production of construction materials.Using the desulfurizing agent of the present invention, desulfuration efficiency is high, and
Do not produce additional pollutant.The water consumption of the method for the present invention takes off the 20% of technique for wet desulphurization, suitable for western water shortage
Area.Using currently preferred method, can solve that conventional wet desulfurization water consumption is big and conventional dry desulfuration efficiency is low, cost
It is high and easily cause secondary pollution problems.The method of the present invention can use the waste water that industrial inter-process is crossed, and reduce waste water
Discharge, solve waste water handling problem, save the processing cost of waste water, and realize waste water circulation recycling.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
The manufacture method of the gypsum of the present invention includes (1) desulfurized step；(2) plaster formulation step.It is situated between in detail below
Continue.
<Desulfurized step>
Dry desulfurization is carried out to flue gas using the smoke absorption agent of dry powder-shaped, so as to form accessory substance.Ability can be used
The conventional equipment in domain carries out flue gas desulfurization, repeats no more here.The smoke absorption agent of the present invention includes 10~25 parts by weight
Nano inorganic oxide, 10~25 parts by weight micron inorganic oxides, 10~25 parts by weight magnesia and 20~35 parts by weight oxygen
Change calcium.Nano inorganic oxide can be selected from SiO2、Fe2O3、Al2O3, CuO and MnO2In one or more.The inorganic oxygen of micron
Compound can be selected from SiO2、Fe2O3、Al2O3, CuO and MnO2In one or more.
Preferably, smoke absorption agent can include 15~23 parts by weight nano inorganic oxides, 15~23 parts by weight microns
Inorganic oxide, 20~25 parts by weight magnesia and 22~35 parts by weight calcium oxide.It is highly preferred that smoke absorption agent can include
16~22 parts by weight nano inorganic oxides, 16~22 parts by weight micron inorganic oxides, 20~23 parts by weight magnesia and 30
~35 parts by weight calcium oxide.Each component of smoke absorption agent is controlled in above range, its desulfurized effect can be effectively improved,
So as to ensure the stability of the stability of accessory substance and gypsum production.
In the smoke absorption agent of the present invention, the particle diameter of nano inorganic oxide can be in 10~100nm；Preferably 20~
90nm.The particle diameter of micron inorganic oxide can be at 1~500 μm；Preferably 10~100 μm.Using the nothing of above-mentioned different-grain diameter
Machine oxide combines with calcium oxide, can effectively remove the sulfur dioxide in flue gas, and then is stably formed accessory substance, is advantageous to
The steady production of gypsum.
In the smoke absorption agent of the present invention, described nano inorganic oxide can be selected from SiO2、Fe2O3、Al2O3、CuO
And MnO2In one or more；Preferably include SiO2、Al2O3And MnO2。SiO2、Al2O3And MnO2Weight ratio be 3~8:5~
10:5~10, such as 5~8:8~10:8~10.Described micron inorganic oxide can be selected from SiO2、Fe2O3、Al2O3、CuO
And MnO2In one or more；Preferably include SiO2、Al2O3And MnO2。SiO2、Al2O3And MnO2Weight ratio be 3~8:5~
10:5~10, such as 5~8:8~10:8~10.
SO in flue gas2The surface of smoke absorption agent is reached with flue gas, is adsorbed by its surface；Nanoscale and micron-sized
SO in inorganic oxide catalysis flue gas2With O2With reference to being converted into SO3；SO after catalysis oxidation3Given birth to adsorbent effects such as calcium oxide
Into sulfate；A small amount of not oxidized SO2The adsorbent such as gas and calcium oxide effect generation sulphite.
According to the specific embodiment of the present invention, smoke absorption agent includes 35 parts by weight calcium oxide, 23 parts by weight oxygen
Change magnesium, 21 parts by weight nano inorganic oxides and 21 parts by weight nano inorganic oxides；In described nano inorganic oxide,
SiO2、Al2O3And MnO2Weight ratio be 5:8:8；In described micron inorganic oxide, SiO2、Al2O3And MnO2Weight
Than for 5:8:8.
In the present invention, described smoke absorption agent can be dry powder-shaped.So can be directly by smoke absorption agent and cigarette
Gas mixes, and then carries out SO to flue gas2Removing, so as in the case where not needing a large amount of process waters complete flue gas desulfurization,
And a large amount of industrial wastes are not produced.
Dry flue gas desulphurization is carried out using above-mentioned smoke absorption agent.During dry desulfurization, the titanium dioxide of the flue gas
Sulfur content can be 300~40000mg/Nm3, be preferably 500~30000mg/Nm3, more preferably 600~5000mg/Nm3.Oxygen
Gas content can be 10~18vol%, be preferably 15~18vol%.Flow velocity can be 110~200 for 2~5m/s and temperature
℃.Preferably, the flow velocity of the flue gas is 2.5~3.5m/s and temperature is 135~140 DEG C.Above-mentioned Gas Parameters represent cigarette
The parameter of gas porch；The parameter of smoke outlet is depending on practical sulphur removal situation.Using above-mentioned technological parameter, be advantageous to obtain
The accessory substance of steady quality is obtained, so as to be advantageous to the steady production of gypsum.In the present invention, flue gas can contain nitrogen oxides, its
Content can be 50~600mg/Nm3, be preferably 100~500mg/Nm3, more preferably 450~500mg/Nm3。
<Plaster formulation step>
Material comprising the accessory substance, diatomite, talcum powder and binding agent is well mixed and obtains siccative, and by described in
Water mixes with siccative, and then pouring molding obtains the gypsum.Optionally, maintenance and drying steps can also be included.Water is with doing
The weight ratio of material is 0.2~0.5, preferably 0.3~0.35.Described water is the industrial wastewater that pH is more than 5.Can so solve
Waste water handling problem.
In the present invention, the material includes 40~80 parts by weight, 25~35 parts by weight diatomite, 5~10 weights
Measure part talcum powder and 1~10 parts by weight binder.Preferably, the material includes 50~70 parts by weight, 25~30 weights
Measure part diatomite, 5~10 parts by weight talcum powder and 2~5 parts by weight binder.Accessory substance is the by-product that above-mentioned desulfurized step obtains
Thing.Diatomite, talcum powder can use it is known in the art those.The binding agent is in cement, magnesium sulfate or magnesia
One kind or kind；Preferably magnesium sulfate.Present invention discover that magnesium sulfate is particularly conducive to improve gypsum performance.
In certain embodiments, the material also includes 5~10 parts by weight additives, such as 5~8 parts by weight.Addition
Agent can be selected from the one or more in lignin water reducer, naphthalene sulfonic acids water reducer, benzene sulfonic acid water reducer or polycarboxylate water-reducer.
Preferably, additive is powdery polycarboxylic acid water reducer.
The material of the present invention can also include some industrial solid wastes, as long as not influenceing its combination property.Industry
Solid waste can be selected from the one or more in flyash, slag powders or building waste powder；Preferably flyash and/or slag
Powder.The example of the slag powders of the present invention includes but is not limited to clinker, slag, slag or scum after ball milling.Flyash be from
The fine ash that catching is got off in flue gas after coal combustion, flyash are the primary solids wastes of coal-burning power plant's discharge.Slag be ironmaking,
Make steel the slag charge of discharge.Building waste powder is the industrial solid wastes that crush using building waste as raw material.Using above-mentioned work
Industry solid waste, be advantageous to obtain the gypsum of steady quality.The granularity of industrial solid wastes is preferably more than 200 mesh, more preferably
More than 250 mesh.According to an embodiment of the invention, the industrial solid wastes are selected from ore deposit of the granularity more than 200 mesh
Ground-slag and flyash.
<Gypsum>
Gypsum can stably be produced using the above method.Each raw material and its proportioning as it was previously stated, repeat no more here.
In these raw materials, accessory substance is to carry out dry desulfurization acquisition to flue gas using smoke absorption agent.Smoke absorption agent and dry
Method sulfur method is as previously described.
In order to improve product combination property, product of the invention is preferably made of the raw material for including following component：40~
80 parts by weight, 25~35 parts by weight diatomite, 5~10 parts by weight talcum powder, 1~10 parts by weight binder and 5~10
Parts by weight additive；Preferably 50~70 parts by weight, 28~30 parts by weight diatomite, 6~10 parts by weight talcum powder, 2
~5 parts by weight binder and 5~8 parts by weight additives.The species of binding agent and additive as it was previously stated, repeat no more here.
The apparent size deviation of the gypsum of the present invention can be less than 0.2%, preferably less than 0.15%；Water absorption rate is less than
10%, preferably smaller than 9%；Longitudinal fracture load is more than 500N, preferably greater than 550N；Transverse breakage load is more than 200N, preferably
More than 220N.
" part " in following preparation example and embodiment represents parts by weight, unless specifically stated otherwise.
The performance of the gypsum of following examples is measured using JC/T 799-2007, by taking the finished product of 12mm thickness as an example
It is measured.
Preparation example 1
Raw material listed in Table is well mixed, obtains smoke absorption agent.Nano level particle diameter is 20nm；Micron-sized grain
Footpath is 10 μm.
Table 1, the formula of smoke absorption agent
Embodiment 1
(1) flue gas dry desulfurizing is carried out using the smoke absorption agent of preparation example 1, so as to obtain accessory substance.Flow velocity is 3.5m/
S, oxygen content 15vol%；The other specification of smoke inlet, the parameter of exhanst gas outlet are as shown in tables 2 and 3.
(2) product, diatomite, talcum powder, binding agent (magnesium sulfate) and additive (powdery polycarboxylic acid water reducer) are mixed
Siccative uniformly is obtained, and water is mixed with the siccative (ratio of water to material 0.3), then pouring molding, maintenance and drying, obtain stone
Cream.
Table 2, flue gas desulfurization project duty parameter
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1078078 | m3/h |
| 2 | Standard state exhaust gas volumn | 693175 | Nm3/h |
| 3 | Inlet temperature | 138 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 622 | mg/Nm3 |
| 5 | Desulfuration efficiency | 99 | Wt% |
| 6 | Nitrogen oxides entrance concentration | 430 | mg/Nm3 |
| 7 | Denitration efficiency | 90 | Wt% |
| 8 | Entrance flue dust | 110 | mg/Nm3 |
| 9 | Efficiency of dust collection | 90 | Wt% |
| 10 | Humidity of flue gas | 5.3 | Wt% |
Table 3, desulfurizing item emission behaviour
| Sequence number | Project | Quantity | Unit |
| 1 | Exiting flue gas amount (operating mode) | 824493 | m3/h |
| 2 | Exhaust gas temperature | 63 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 6.02 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 40 | mg/Nm3 |
| 5 | Export dust concentration | 11 | mg/Nm3 |
| 6 | The quantum of output of accessory substance | 4.7 | t/h |
The material proportion and the performance test results of gypsum are referring to table 4 and table 5.
The material proportion of table 4, gypsum
| Numbering | Accessory substance | Diatomite | Talcum powder | Binding agent | Additive |
| Embodiment 1 | 60 | 25 | 5 | 5 | 5 |
The performance test results of table 5, gypsum
Embodiment 2
(1) flue gas dry desulfurizing is carried out using the smoke absorption agent of preparation example 1.Flow velocity is 2.5m/s, and oxygen content is
15vol%；The other specification of smoke inlet, the parameter of exhanst gas outlet are as shown in tables 6 and 7.
(2) product, diatomite, talcum powder, binding agent (magnesium sulfate) and additive (powdery polycarboxylic acid water reducer) are mixed
Siccative uniformly is obtained, and water is mixed with siccative (ratio of water to material 0.3), then pouring molding, maintenance and drying, obtain gypsum.
Table 6, flue gas desulfurization project duty parameter
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1078078 | m3/h |
| 2 | Standard state exhaust gas volumn | 693175 | Nm3/h |
| 3 | Inlet temperature | 138 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 622 | mg/Nm3 |
| 5 | Desulfuration efficiency | 99 | Wt% |
| 6 | Nitrogen oxides entrance concentration | 430 | mg/Nm3 |
| 7 | Denitration efficiency | 90 | Wt% |
| 8 | Entrance flue dust | 110 | mg/Nm3 |
| 9 | Efficiency of dust collection | 90 | Wt% |
| 10 | Humidity of flue gas | 5.3 | Wt% |
Table 7, desulfurizing item emission behaviour
| Sequence number | Project | Quantity | Unit |
| 1 | Tower exiting flue gas amount (operating mode) | 824493 | m3/h |
| 2 | Exhaust gas temperature | 63 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 6.02 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 40 | mg/Nm3 |
| 5 | Export dust concentration | 11 | mg/Nm3 |
| 6 | The quantum of output of accessory substance | 4.7 | t/h |
Gypsum material proportion and the performance test results are referring to table 8 and table 9.
Table 8, gypsum material proportion
| Numbering | Accessory substance | Diatomite | Talcum powder | Binding agent | Additive |
| Embodiment 2 | 55 | 30 | 5 | 5 | 5 |
Table 9, gypsum the performance test results
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from the substantive content of the present invention, this area skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within the scope of the present invention.
Claims (10)
1. a kind of production method of gypsum, it is characterised in that comprise the following steps：
(1) dry desulfurization is carried out to flue gas using the smoke absorption agent of dry powder-shaped, so as to form accessory substance；The smoke absorption agent
Including 10~25 parts by weight nano inorganic oxides, 10~25 parts by weight micron inorganic oxides, 10~25 parts by weight magnesia
With 20~35 parts by weight calcium oxide；Wherein, described nano inorganic oxide is selected from SiO2、Fe2O3、Al2O3, CuO and MnO2In
One or more, described micron inorganic oxide is selected from SiO2、Fe2O3、Al2O3, CuO and MnO2In one or more；
(2) obtain siccative by the material comprising the accessory substance, diatomite, talcum powder and binding agent is well mixed, and by water with
The siccative mixing, then pouring molding obtains the gypsum.
2. according to the method for claim 1, it is characterised in that during the dry desulfurization of step (1), the flue gas
Content of sulfur dioxide is 300~40000mg/Nm3, oxygen content be 10~18vol%, flue gas flow rate is 2~5m/s and temperature
For 110~200 DEG C.
3. according to the method for claim 1, it is characterised in that in step (1), the smoke absorption agent includes 15~23 weights
Measure part nano inorganic oxide, 15~23 parts by weight micron inorganic oxides, 20~25 parts by weight magnesia and 22~35 weight
Part calcium oxide.
4. according to the method for claim 1, it is characterised in that in step (1), described nano inorganic oxide includes
SiO2、Al2O3And MnO2；Described micron inorganic oxide includes SiO2、Al2O3And MnO2。
5. according to the method for claim 4, it is characterised in that in described nano inorganic oxide, SiO2、Al2O3With
MnO2Weight ratio be 3~8:5~10:5~10；In described micron inorganic oxide, SiO2、Al2O3And MnO2Weight
Than for 3~8:5~10:5~10.
6. according to the method described in any one of Claims 1 to 5, it is characterised in that in step (2), the material include 40~
80 parts by weight, 25~35 parts by weight diatomite, 5~10 parts by weight talcum powder and 1~10 parts by weight binder.
7. according to the method described in any one of claim 6, it is characterised in that the binding agent is selected from cement, magnesium sulfate or oxygen
Change one kind or kind in magnesium.
8. according to the method for claim 6, it is characterised in that described material also includes 5~10 parts by weight additives；Institute
State additive and be selected from least one of lignin water reducer, naphthalene sulfonic acids water reducer, benzene sulfonic acid water reducer or polycarboxylate water-reducer.
9. according to the method described in any one of Claims 1 to 5, it is characterised in that the weight of water and siccative ratio is 0.2~0.5,
Described water is the industrial wastewater that pH is more than 5.
10. a kind of gypsum, it is prepared by the method described in any one of claim 1~9.
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| CN102824844A (en) * | 2012-09-11 | 2012-12-19 | 北京世能中晶能源科技有限公司 | Desulfurization and denitrification agent, preparation method and application thereof |
| CN103553526A (en) * | 2013-10-16 | 2014-02-05 | 上海利物宝建筑科技有限公司 | Gypsum-based door and window seam filling and sealing mortar as well as preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102824844A (en) * | 2012-09-11 | 2012-12-19 | 北京世能中晶能源科技有限公司 | Desulfurization and denitrification agent, preparation method and application thereof |
| CN103553526A (en) * | 2013-10-16 | 2014-02-05 | 上海利物宝建筑科技有限公司 | Gypsum-based door and window seam filling and sealing mortar as well as preparation method and application thereof |
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