CN109265111A - Blast furnace flue gas desulphurization building gypsum and preparation method thereof - Google Patents
Blast furnace flue gas desulphurization building gypsum and preparation method thereof Download PDFInfo
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- CN109265111A CN109265111A CN201811396834.3A CN201811396834A CN109265111A CN 109265111 A CN109265111 A CN 109265111A CN 201811396834 A CN201811396834 A CN 201811396834A CN 109265111 A CN109265111 A CN 109265111A
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- flue gas
- blast furnace
- furnace flue
- gypsum
- gas desulphurization
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—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
- C04B28/04—Portland 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to building gypsum preparation technical fields, and in particular to blast furnace flue gas desulphurization building gypsum and preparation method thereof.Present invention solves the technical problem that being that the gypsum block intensity that existing flue gas desulfurization building gypsum is prepared is low, water absorption rate is high.The present invention provides a kind of flue gas desulfurization building gypsums, are prepared according to weight ratio meter by following raw material: blast furnace flue gas desulfurized gypsum: ordinary portland cement: former times lattice reach soil: lime=1:0.1~0.15:0.2:0.2.The present invention also provides the preparation methods of its building block, add water to be mixed raw material grind into powder, pour into mold and carry out natural curing after Cheng Mo to obtain the final product.The intensity for the gypsum block that blast furnace flue gas desulphurization building gypsum of the present invention is prepared improves, while reducing water absorption rate.Flyash is replaced up to soil using former times lattice in blast furnace flue gas desulphurization building gypsum of the present invention, cost is greatly saved.
Description
Technical field
The invention belongs to building gypsum preparation technical fields, and in particular to blast furnace flue gas desulphurization building gypsum and its preparation side
Method.
Background technique
The acid rain problem very severe in many areas in China, ecology and health problem to China have had resulted in huge
It influences.And causing the immediate cause of acid rain phenomenon is because the tail containing a large amount of sulfur dioxide has been discharged after the coal burning of flood tide
Gas, containing just will form acid rain after a large amount of sulfur dioxide gas in air.With the rapid development of economic construction of China, Ren Minsheng
The flat continuous improvement of running water, the increasingly reinforcement of environmental consciousness, the environmentally protective emphasis for having become China's concern.The Chinese government puts into effect
Many policies and measure control the discharge of sulfur dioxide, reduce sulfur dioxide aerial content, and provide discharge
Flue gas could discharge after having to pass through the discharge standard for reaching certain after desulfurization process.
The flue gas desulfurization technique that can be used at present is very more, and most popular technology is limestone/lime-gypsum
Wet Flue Gas Desulfurization Technique, the advantages such as the technology is high, easy to operate with desulfuration efficiency, sulfur removal technology is mature, absorbent is cheap become
Most popular sulfur removal technology.With the rapid development application of China's desulfurization equipment and desulfurization technology, the discharge of sulfur dioxide
Although having obtained effective control, because of the extensive application of limestone/lime-gypsum Wet Flue Gas Desulfurization Technique, meeting after wet desulphurization
Generate the by-product desulfurized gesso of flue gas of flood tide.Desulfurized gesso of flue gas and flyash together and referred to as two big trade wastes, cigarette
The stacking of desulfurization gypsum not only occupies a large amount of soils, can also cause seriously to pollute to air and water resource, influence the body of resident
Body health.Application of the gypsum in terms of tradition is very mature, is difficult have breakthrough, but by desulfurized gesso of flue gas system
At gypsum block is produced after flue gas desulfurization building gypsum, the sintering clay brick of severe attrition land resource can be not only replaced, also
It can use harm of a large amount of desulfurized gesso of flue gas mitigation to environment.Since flue gas desulfurization building gypsum has setting time
Short, the problems such as intensity declines after aquation intensity is lower, water absorption rate is higher and water suction, so that it is obtained the application process of recycling can be by
To certain restriction.
Currently, domestic generally use incorporation organic-based material and inorganic additive to improve the power of blast furnace flue gas desulfurized gypsum
Learn performance, thus as building gypsum carry out using.Proportion, the type of admixture are not quite similar, ununified method and mark
Standard, region gender gap are larger.Huang Qixiang etc. (New Building Materials, 2017,44 (01): 37-39) is research shows that by quality percentage
After mixing in gypsum than the high alumina cement for 20%, consumptive use of water normal consistence is reduced to 52.9%, and the 28d of test specimen is anti-to be rolled over and resist
Compressive Strength is respectively 6.03MPa, 11.05MPa, and water absorption rate and coefficient of softing are respectively 28.23% and 0.70, anti-folding and pressure resistance
It spends relatively low；Zhao Su rather waits (flyash, 2013 (02): 1-3) research shows that the fine-ground fly-ash that volume is 20.0% is mixed
After gypsum, test specimen 28d compression strength is 28.3MPa, but higher cost.
Summary of the invention
The technical problem to be solved by the present invention is to the gypsum block intensity that existing flue gas desulfurization building gypsum is prepared
It is low, water absorption rate is high.
The present invention is to solve its technical problem the technical solution adopted is that providing a kind of blast furnace flue gas desulphurization building gypsum,
Be prepared according to weight ratio meter by following raw material: blast furnace flue gas desulfurized gypsum: ordinary portland cement: former times lattice reach soil: lime
=1:0.1~0.15:0.2:0.2.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum, the blast furnace flue gas desulfurized gypsum is after wet desulphurization
The by-product of generation；Granularity is at 60 μm or less；Water content controls within 10%.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum, the granularity of the former times lattice up to soil is less than 0.3mm, drying
After use.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum, the ordinary portland cement is 42.5 grades of common silicic acid
Salt cement；The lime is second level quick lime.
The present invention also provides the preparation method of blast furnace flue gas desulphurization building gypsum, include the following steps: blast furnace flue gas
Desulfurized gypsum, ordinary portland cement, former times lattice are up to soil, lime grind into powder according to weight ratio 1:0.1~0.15:0.2:0.2
It mixes to obtain the final product.
The present invention also provides the preparation method of blast furnace flue gas desulphurization building gypsum building block, include the following steps: to blast furnace
In flue gas desulfurization building gypsum plus water is mixed, and pours into mold and carries out natural curing after Cheng Mo to obtain the final product；The blast furnace flue gas
The weight ratio of each raw material and water in desulphurization building gypsum are as follows: blast furnace flue gas desulfurized gypsum: ordinary portland cement: former times lattice reach soil:
Lime: water=1:0.1~0.15:0.2:0.2:0.5~0.75.
Wherein, in the preparation method of above-mentioned blast furnace flue gas desulphurization building gypsum building block, the time control of the stirring exists
In 1min.
Wherein, in the preparation method of above-mentioned blast furnace flue gas desulphurization building gypsum building block, the natural curing is in room temperature
Under avoid direct sunlight and drenching with rain.
The present invention also provides blast furnace flue gas desulphurization building gypsum building blocks, are built using above-mentioned blast furnace flue gas desulphurization building gypsum
The preparation method of block is prepared.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum building block, the blast furnace flue gas desulphurization building gypsum building block is certainly
So the flexural strength after maintenance 28 days is 4.0~7.7MPa；Compression strength is 25~37MPa；Water absorption rate is 15~25%；Anti- folding
Strength softening coefficient is 0.37~0.64；Compression strength coefficient of softing is 0.33~0.47.
The beneficial effects of the present invention are:
The intensity for the gypsum block that blast furnace flue gas desulphurization building gypsum of the present invention is prepared improves, while reducing suction
Water rate, flexural strength of the blast furnace flue gas desulphurization building gypsum building block after natural curing in 28 days are 4.0~7.7MPa；Compression strength
For 25~37MPa；Water absorption rate is 15~25%；Flexural strength coefficient of softing is 0.37~0.64；Compression strength coefficient of softing is
0.33~0.47, resistance to compression and the flexural strength of flue gas desulfurization building gypsum are substantially increased, water absorption rate is reduced.Blast furnace of the present invention
Flyash is replaced up to soil using former times lattice in flue gas desulfurization building gypsum, cost is greatly saved, and provides a kind of new height
The preparation method of kiln gas desulphurization building gypsum.The former times lattice being added in the preparation of blast furnace flue gas desulphurization building gypsum of the present invention reach soil
Intensity is high when having the characteristics that dry, makes the blast furnace desulfurization fume gypsum block intensity with higher being prepared.
Detailed description of the invention
Fig. 1 is the application of the blast furnace flue gas desulphurization building gypsum building block that is prepared of the method for the present invention in practical projects.
Specific embodiment
In order to reduce harm of the desulfurized gesso of flue gas to environment, and desulfurization fume gypsum is made full use of to prepare a kind of new height
Kiln gas desulphurization building gypsum, inventors discovered through research that, blast furnace flue gas desulfurization stone is added to using former times lattice up to soil as ingredient
The building gypsum building block resistance to compression with higher being prepared in cream and flexural strength reduce water absorption rate, and can be effective
Reduce cost.
The present invention provides a kind of blast furnace flue gas desulphurization building gypsums, are prepared according to weight ratio meter by following raw material:
Blast furnace flue gas desulfurized gypsum: ordinary portland cement: former times lattice reach soil: lime=1:0.1~0.15:0.2:0.2.
In the present invention, using blast furnace flue gas desulfurized gypsum as primary raw material, addition ordinary portland cement, which can be improved, to be built
Build the flexural strength of gypsum；Compression strength can be improved up to soil in addition former times lattice；The effect of lime is to reduce water absorption rate.In order to make to make
Standby obtained blast furnace flue gas building gypsum building block has preferable compression strength, flexural strength and lower water absorption rate, needs to control
Blast furnace flue gas desulfurized gypsum in blast furnace flue gas desulphurization building gypsum: ordinary portland cement: former times lattice are up to soil: the weight ratio of lime is
1:0.1~0.15:0.2:0.2.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum, the blast furnace flue gas desulfurized gypsum is after wet desulphurization
The by-product of generation；Granularity is at 60 μm or less；Water content controls within 10%.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum, the granularity of the former times lattice up to soil is less than 0.3mm, drying
After use.In order to control former times lattice up to the contact area of soil and unclassified stores, former times lattice need to be controlled up to native granularity and be less than 0.3mm.This
Invention prepares building gypsum as raw material up to soil using former times lattice and has on the one hand saved cost, on the other hand improves the strong of building gypsum
Degree.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum, the ordinary portland cement is 42.5 grades of common silicic acid
Salt cement；The lime is second level quick lime.
The present invention also provides the preparation method of blast furnace flue gas desulphurization building gypsum, include the following steps: blast furnace flue gas
Desulfurized gypsum, ordinary portland cement, former times lattice are up to soil, lime grind into powder according to weight ratio 1:0.1~0.15:0.2:0.2
It mixes to obtain the final product.
The present invention also provides the preparation method of blast furnace flue gas desulphurization building gypsum building block, include the following steps: to blast furnace
In flue gas desulfurization building gypsum plus water is mixed, and pours into mold and carries out natural curing after Cheng Mo to obtain the final product；The blast furnace flue gas
The weight ratio of each raw material and water in desulphurization building gypsum are as follows: blast furnace flue gas desulfurized gypsum: ordinary portland cement: former times lattice reach soil:
Lime: water=1:0.1~0.15:0.2:0.2:0.5~0.75.
Wherein, in the preparation method of above-mentioned blast furnace flue gas desulphurization building gypsum building block, the time control of the stirring exists
In 1min.Blast furnace flue gas desulfurized gypsum, which adds a small amount of water, to be condensed rapidly, and mixing time is too long to will affect molding, when by stirring
Between control in 1min, stirred evenly in 1min, there is mobility.
Wherein, in the preparation method of above-mentioned blast furnace flue gas desulphurization building gypsum building block, the natural curing is in room temperature
Under avoid direct sunlight and drenching with rain.
The present invention also provides blast furnace flue gas desulphurization building gypsum building blocks, are built using above-mentioned blast furnace flue gas desulphurization building gypsum
The preparation method of block is prepared.
Wherein, in above-mentioned blast furnace flue gas desulphurization building gypsum building block, the blast furnace flue gas desulphurization building gypsum building block is certainly
So the flexural strength after maintenance 28 days is 4.0~7.7MPa；Compression strength is 25~37MPa；Water absorption rate is 15~25%；Anti- folding
Strength softening coefficient is 0.37~0.64；Compression strength coefficient of softing is 0.33~0.47.Blast furnace flue gas desulphurization building gypsum system
The intensity tool of standby obtained gypsum block is improved to some extent, while reducing water absorption rate.
The present invention will further be elaborated by specific embodiment below.
Blast furnace flue gas desulfurized gypsum contains the chemical component of following weight percent: CaSO in the embodiment of the present invention4·2H2O
1.2%, CaSO4·1/2H2O 80-90%, CaSO36%, Al2O32.8%, MgO 0.86%, SiO21.2% and Fe2O3
5.64%.Granularity is 55 μm；Water content is 8%.
Ordinary portland cement is 42.5 grades of ordinary portland cements in the embodiment of the present invention；The granularity of former times lattice up to soil is less than
0.3mm；Lime is second level quick lime.
Embodiment 1
Blast furnace flue gas desulphurization building gypsum includes following raw material in the present embodiment: blast furnace flue gas desulfurized gypsum 2000g, common
Portland cement 300g, former times lattice reach soil 400g, lime 400g.
The preparation method of blast furnace flue gas desulphurization building gypsum in the present embodiment: above-mentioned raw materials are uniformly mixed to obtain the final product.
The preparation method of blast furnace flue gas desulphurization building gypsum building block in the present embodiment: blast furnace flue gas desulfurized gypsum 2000g, general
Logical portland cement 300g, former times lattice up to soil 400g, lime 400g and water 1360g mixing 30s, pour into after mold 5min at
Mould obtains blast furnace flue gas desulphurization building gypsum building block after natural curing.Obtained blast furnace flue gas desulphurization building gypsum building block again into
Row natural curing 28 days, it is according to (GB/T 9776-2008 " building gypsum ") measurement compression strength after drying in an oven
27.60MPa；Flexural strength is 7.53MPa；Water absorption rate is 15.11%；Flexural strength coefficient of softing is 0.64；Compression strength is soft
Changing coefficient is 0.42.
Embodiment 2
Blast furnace flue gas desulphurization building gypsum includes following raw material in the present embodiment: blast furnace flue gas desulfurized gypsum 2000g, common
Portland cement 210g, former times lattice reach soil 400g, lime 400g.
The preparation method of blast furnace flue gas desulphurization building gypsum in the present embodiment: above-mentioned raw materials are uniformly mixed to obtain the final product.
The preparation method of blast furnace flue gas desulphurization building gypsum building block in the present embodiment: blast furnace flue gas desulfurized gypsum 2000g, general
Logical portland cement 210g, former times lattice up to soil 400g, lime 400g and water 1500g mixing 45s, pour into after mold 5min at
Mould obtains blast furnace flue gas desulphurization building gypsum building block after natural curing.Obtained blast furnace flue gas desulphurization building gypsum building block again into
Row natural curing 28 days, it is according to (GB/T9776-2008 " building gypsum ") measurement compression strength after drying in an oven
30.92MPa；Flexural strength is 5.57MPa；Water absorption rate is 15.44%；Flexural strength coefficient of softing is 0.45；Compression strength is soft
Changing coefficient is 0.47.
Embodiment 3
The building block of blast furnace flue gas desulphurization building gypsum includes following raw material in the present embodiment: blast furnace flue gas desulfurized gypsum 2000g,
Ordinary portland cement 250g, former times lattice reach soil 400g, lime 400g.
The preparation method of blast furnace flue gas desulphurization building gypsum in the present embodiment: above-mentioned raw materials are uniformly mixed to obtain the final product.
In the present embodiment the building block of blast furnace flue gas desulphurization building gypsum the preparation method comprises the following steps: blast furnace flue gas desulfurized gypsum 2000g,
Ordinary portland cement 250g, former times lattice up to soil 400g, lime 400g and water 1500g mixing 50s, pour into after mold 5min at
Mould obtains blast furnace flue gas desulphurization building gypsum building block after natural curing.Obtained blast furnace flue gas desulphurization building gypsum building block again into
Row natural curing 28 days, it is according to (GB/T 9776-2008 " building gypsum ") measurement compression strength after drying in an oven
27.60MPa；Flexural strength is 7.5MPa；Water absorption rate is 15.11%；Flexural strength coefficient of softing is 0.59；Compression strength softening
Coefficient is 0.42.
Embodiment 4
The building block of blast furnace flue gas desulphurization building gypsum includes following raw material in the present embodiment: blast furnace flue gas desulfurized gypsum 2000g,
Ordinary portland cement 220g, former times lattice reach soil 400g, lime 400g.
The preparation method of blast furnace flue gas desulphurization building gypsum in the present embodiment: above-mentioned raw materials are uniformly mixed to obtain the final product.
In the present embodiment the building block of blast furnace flue gas desulphurization building gypsum the preparation method comprises the following steps: blast furnace flue gas desulfurized gypsum 2000g,
Ordinary portland cement 220g, former times lattice up to soil 400g, lime 400g and water 1360g mixing 55s, pour into after mold 5min at
Mould obtains blast furnace flue gas desulphurization building gypsum building block after natural curing.Obtained blast furnace flue gas desulphurization building gypsum block curing
28 days, be in an oven 20.65MPa according to (GB/T 9776-2008 " building gypsum ") measurement compression strength after drying；Anti- folding
Intensity is 5.63MPa；Water absorption rate is 22.44%；Flexural strength coefficient of softing is 0.48；Compression strength coefficient of softing is 0.38.
Claims (10)
1. blast furnace flue gas desulphurization building gypsum, it is characterised in that be prepared according to weight ratio meter by following raw material: blast furnace flue gas
Desulfurized gypsum: ordinary portland cement: former times lattice reach soil: lime=1:0.1~0.15:0.2:0.2.
2. blast furnace flue gas desulphurization building gypsum according to claim 1, it is characterised in that: the blast furnace flue gas desulfurized gypsum
It is the by-product generated after wet desulphurization；Granularity is at 60 μm or less；Water content controls within 10%.
3. blast furnace flue gas desulphurization building gypsum according to claim 1 or 2, it is characterised in that: grain of the former times lattice up to soil
Degree is less than 0.3mm, uses after drying.
4. described in any item blast furnace flue gas desulphurization building gypsums according to claim 1~3, it is characterised in that: the ordinary silicon
Acid salt cement is 42.5 grades of ordinary portland cements；The lime is second level quick lime.
5. the preparation method of blast furnace flue gas desulphurization building gypsum, it is characterised in that: by blast furnace flue gas desulfurized gypsum, normal silicate
Cement, former times lattice are mixed up to soil, lime grind into powder according to weight ratio 1:0.1~0.15:0.2:0.2 to obtain the final product.
6. the preparation method of blast furnace flue gas desulphurization building gypsum building block, it is characterised in that: to described in any one of Claims 1 to 4
Blast furnace flue gas desulphurization building gypsum in plus water be mixed, pour into mold after Cheng Mo and carry out natural curing to obtain the final product；The height
The weight ratio of each raw material and water in kiln gas desulphurization building gypsum are as follows: blast furnace flue gas desulfurized gypsum: ordinary portland cement: former times lattice
Up to soil: lime: water=1:0.1~0.15:0.2:0.2:0.5~0.75.
7. the preparation method of blast furnace flue gas desulphurization building gypsum building block according to claim 6, it is characterised in that: described to stir
The time mixed controls in 1min.
8. the preparation method of the described in any item blast furnace flue gas desulphurization building gypsum building blocks of according to claim 6 or 7, feature exist
In: the natural curing is to avoid direct sunlight at room temperature and drench with rain.
9. the blast furnace flue gas desulphurization building gypsum building block being prepared using the described in any item methods of claim 6~8.
10. blast furnace flue gas desulphurization building gypsum building block according to claim 9, it is characterised in that: the blast furnace flue gas is de-
Flexural strength after sulphur building gypsum building block natural curing 28 days is 4.0~7.7MPa；Compression strength is 25~37MPa；Water suction
Rate is 15~25%；Flexural strength coefficient of softing is 0.37~0.64；Compression strength coefficient of softing is 0.33~0.47.
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| CN201811396834.3A CN109265111A (en) | 2018-11-22 | 2018-11-22 | Blast furnace flue gas desulphurization building gypsum and preparation method thereof |
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| CN201811396834.3A CN109265111A (en) | 2018-11-22 | 2018-11-22 | Blast furnace flue gas desulphurization building gypsum and preparation method thereof |
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| CN102795825A (en) * | 2012-08-13 | 2012-11-28 | 徐庆旭 | Baking-free brick or building block series product and manufacturing method |
| CN103649006A (en) * | 2011-07-01 | 2014-03-19 | 瓦克化学股份公司 | Gypsum-containing construction material compounds |
| CN104710150A (en) * | 2015-02-04 | 2015-06-17 | 贵州开磷集团股份有限公司 | Imitation wood grain decorative plate and preparation method thereof |
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2018
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|---|---|---|---|---|
| JPH11246285A (en) * | 1998-03-05 | 1999-09-14 | Sekisui Chem Co Ltd | Hard wood-chip cement formed body |
| CN102674783A (en) * | 2011-03-08 | 2012-09-19 | 上海晋马建材有限公司 | Autoclaved desulfurized gypsum aerated building block without calcination |
| CN103649006A (en) * | 2011-07-01 | 2014-03-19 | 瓦克化学股份公司 | Gypsum-containing construction material compounds |
| CN102795825A (en) * | 2012-08-13 | 2012-11-28 | 徐庆旭 | Baking-free brick or building block series product and manufacturing method |
| CN104710150A (en) * | 2015-02-04 | 2015-06-17 | 贵州开磷集团股份有限公司 | Imitation wood grain decorative plate and preparation method thereof |
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| 阮小龙: "高填方边坡昔格达土改性及加筋机理研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
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