CN106365674B - A method of air-entrained concrete building block is prepared using steel slag tailing slurry and desulfurization ash - Google Patents
A method of air-entrained concrete building block is prepared using steel slag tailing slurry and desulfurization ash Download PDFInfo
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- CN106365674B CN106365674B CN201610814055.5A CN201610814055A CN106365674B CN 106365674 B CN106365674 B CN 106365674B CN 201610814055 A CN201610814055 A CN 201610814055A CN 106365674 B CN106365674 B CN 106365674B
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- 238000000034 method Methods 0.000 title claims abstract description 97
- 239000002893 slag Substances 0.000 title claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 53
- 230000023556 desulfurization Effects 0.000 title claims abstract description 53
- 239000004567 concrete Substances 0.000 title claims abstract description 44
- 239000002002 slurry Substances 0.000 title claims description 115
- 238000012423 maintenance Methods 0.000 claims abstract description 38
- 239000004576 sand Substances 0.000 claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- 239000006260 foam Substances 0.000 claims abstract description 6
- 239000003381 stabilizer Substances 0.000 claims abstract description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 86
- 239000000292 calcium oxide Substances 0.000 claims description 48
- 235000012255 calcium oxide Nutrition 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 33
- 235000019353 potassium silicate Nutrition 0.000 claims description 32
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 32
- 238000013329 compounding Methods 0.000 claims description 28
- 238000000498 ball milling Methods 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 22
- 239000011398 Portland cement Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 238000005187 foaming Methods 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000004411 aluminium Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000006071 cream Substances 0.000 claims description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 241000931143 Gleditsia sinensis Species 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims description 4
- 229930182490 saponin Natural products 0.000 claims description 4
- 150000007949 saponins Chemical class 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 241000196324 Embryophyta Species 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000002594 sorbent Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 235000010755 mineral Nutrition 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000002956 ash Substances 0.000 abstract description 37
- 238000004537 pulping Methods 0.000 abstract description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 6
- 239000004571 lime Substances 0.000 abstract description 6
- 229910052602 gypsum Inorganic materials 0.000 abstract description 3
- 239000010440 gypsum Substances 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000011381 foam concrete Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 241000876852 Scorias Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- C04B18/0418—Wet materials, e.g. slurries
-
- 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
-
- 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
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
-
- 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)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明公开了一种利用钢渣尾泥和脱硫灰渣制备加气混凝土砌块的方法，属于固废综合利用技术领域。该方法以钢渣磁选尾泥、脱硫灰渣、水泥、石灰、砂、铝粉膏、稳泡剂等为原料，通过搅拌制浆、成型、静停养护和蒸压养护等工序，制备得到加气混凝土砌块。本发明采用钢渣尾泥代替部分石灰和水泥，脱硫灰渣代替部分石灰、石膏和砂来制备加气混凝土砌块，钢渣尾泥和脱硫灰渣的总掺量可达65％(质量比)以上，解决了钢渣尾泥和脱硫灰渣的利用问题，同时大大降低了原料成本。通过本发明制备的加气混凝土砌块密度低、导热系数低、隔音和抗压强度性能均良好，产品性能达到GB11968‑2006《蒸压加气混凝土砌块》的A3.5B06等级要求。The invention discloses a method for preparing aerated concrete blocks by utilizing steel slag tailing sludge and desulfurization ash, and belongs to the technical field of comprehensive utilization of solid waste. The method uses steel slag magnetic separation tailings, desulfurization ash, cement, lime, sand, aluminum powder paste, foam stabilizer and the like as raw materials, and prepares a compound by stirring and pulping, molding, static maintenance and autoclave maintenance. Air concrete blocks. The invention adopts steel slag tailings to replace part of lime and cement, and desulfurization ash to replace part of lime, gypsum and sand to prepare aerated concrete blocks, and the total content of steel slag tailings and desulfurization ash can reach more than 65% (mass ratio) It solves the problem of utilization of steel slag tailings and desulfurization ash, and at the same time greatly reduces the cost of raw materials. The air-entrained concrete blocks prepared by the method have low density, low thermal conductivity, good sound insulation and compressive strength properties, and the product performance meets the A3.5B06 grade requirements of GB11968-2006 Autoclaved Aerated Concrete Blocks.
Description
Technical field
The invention belongs to solid waste technical field of comprehensive utilization, and in particular to a kind of to be prepared using steel slag tailing slurry and desulfurization ash
The method of air-entrained concrete building block.
Background technique
The iron in steel slag is selected and is used by the method for magnetic separation, due to shape of the iron in steel slag mostly to be wrapped up
Formula exists, in order to improve the rate of recovery of efficiency of magnetic separation and iron, it is necessary to be milled to very thin granularity to steel slag and carry out magnetic again
Choosing.The remaining a large amount of tail mud of meeting during using wet ball-milling and wet magnetic separation recycling iron, is difficult to since water content is high
It utilizes, although its silicate mineral content is very high, since application needs to be dried and dehydrated before, increases using cost,
It thus fails to utilize well, is deposited in plant area more.Existing reported in literature using the clay standby cement mixture of tail, concrete and
((1) Fang Honghui etc., steel slag tailing slurry prepare the experimental study of agglutination material, Henan building materials, the 5th phase 54-56 in 2009 to slag micropowder etc.
Page；(2) Liu Zhiwei etc., the experimental study of converter slag ball milling tail mud activating technology, cement technology, the 1st phase 41-44 in 2011
Page；(3) Liu Zhiwei etc., converter slag ball milling tail mud powder make the research of concrete admixture, concrete, the 10th phase 76- in 2010
Page 79.), but due to the steel slag tailing slurry drying by 30% or more moisture content and ball milling, energy consumption is higher, simultaneously as using wet process ball
Mill, activity is lower, thus competitiveness is weaker compared with other mixing materials, it is difficult to utilize.
Circulating fluidized bed boiler can generate the desulfurization ash of a large amount of limy and gypsum when with furnace sorbent injection desulfurization, living
Property is lower than coal-powder boiler flyash, and water demand ratio is larger, thus utilization is smaller in cement concrete.
Air-entrained concrete building block is a kind of novel energy-conserving building materials, has the characteristics that energy conservation and environmental protection, and raw materials for production are mainly
Cement, lime of calcic etc. and siliceous sand, flyash, slag etc., and steel slag tailing slurry and circulating fluid bed boiler desulfurization lime-ash
Calcium oxide and silica content it is higher, thus the present invention produces aerating using steel slag tailing slurry and recirculating fluidized bed desulfurization ash
Concrete segment realizes the comprehensive utilization of solid waste.Chinese Patent Application No. 201310081667.4 is a kind of made of steel slag
A kind of similar method is disclosed in the production method of foam concrete block, it is clay also with the tail after steel slag steel scoria magnetic separation
Standby concrete segment, but difference is that raw material used in the application is the broken tail mud of steel slag dry method, is needed again before use
By dry ball milling, preparation is foam concrete block, only passes through low temperature reservation, and the production cycle is long, and performance is not so good as steam pressure
Air-entrained concrete building block.It discloses in a kind of method for manufacturing aerated-block of Chinese Patent Application No. 201510334661.2 with wet
Steel slag tailing slurry after method ball milling prepares air-entrained concrete building block, but more slag micropowder has been used in this method, cost compared with
It is high.
Summary of the invention
In order to overcome the deficiencies of the prior art, the technical problem to be solved in the present invention is to provide a kind of using steel slag tailing slurry and de-
The method that sulphur lime-ash prepares air-entrained concrete building block to the tail mud of high-moisture percentage generated during magnetic separation to steel slag and is followed
The desulfurization ash of circulation fluidized bed boiler is comprehensively utilized.
In order to solve the above technical problems, the present invention is achieved by the following technical programs.
The present invention provides a kind of method for preparing air-entrained concrete building block using steel slag tailing slurry and desulfurization ash, this method
Including following process:
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content and is no more than 35%；The steel slag tailing slurry refers to that steel slag passes through
Using remaining tail mud after magnetic separation recovery fe therein and iron-bearing mineral after broken and wet ball grinding, granularity requirements are
0.08mm square hole screen is tailed over no more than 15%.
(2) river sand, desulfurization ash and quick lime ball milling process: are milled to the fineness of requirement respectively；The desulfurization ash
Refer to flying dust and clinker that circulating fluidized bed boiler uses furnace sorbent injection desulfurization technique to generate, is to fineness after ball milling
0.08mm square hole screen is tailed over no more than 15%；The quick lime fineness is that 0.08mm square hole screen is tailed over no more than 25%；The river
It is 15~25% that grain fineness number, which is that 0.08mm square hole screen tails over,.
(3) compounding process a: by waterglass, water, cement and the dewatered steel slag tailing slurry of step (1) and step (2) ball
Mixing plant is added in river sand, desulfurization ash, quick lime after mill after measuring in proportion, slurries 1 are made under vigorous stirring.
(4) compounding process b: weighing foam stabilizer and aluminium powder cream in proportion, and adds them into water and be made 3~6wt%'s
Slurries 2, then the slurries 2 are added in slurries 1 and are sufficiently stirred, slurry is made.
(5) foaming stops conserving process with quiet: the injection die for molding of slurry made from step (4) being formed building block, is gone forward side by side
Row foaming stops conserving with quiet；It is described quiet to stop curing condition are as follows: quiet at 55~65 DEG C to stop maintenance 4~6 hours.
(6) hydro-thermal steam press maintenance process: by step (5) building block after molding be sent into after demoulding, cutting in still kettle into
Row steam press maintenance；The condition of the steam press maintenance are as follows: conserved 6~8 hours in the saturated vapor that 170~190 DEG C of temperature, be made and add
Gas concrete segment.
Wherein: in the compounding process a, in terms of dry material quality, every 100kg mixture contains: steel slag tailing slurry 25~
45kg, 3~8kg of cement, 4~8g of quick lime, 10~20kg of river sand, 24~45kg of desulfurization ash, 1~2kg of waterglass.
In the compounding process b, the mixture in every 100kg compounding process a adds aluminium powder 0.05~0.09kg of cream again, surely
0.02~0.05kg of infusion.
In above-mentioned operation, total amount of water is the sum of the water that each material is included in amount of water and raw material, account for mixture with
The 60~65% of dry material meter gross mass.[in terms of dry material quality, when referring to that each material quality signified in proportion is not aqueous
Quality, but the quality of each raw material need to add contained humidity quality when actual metered.If the quality of certain raw material is m in proportion1Kg,
The moisture content of the raw material is w1%, m1Then refer to the quality when raw material is entirely free of moisture, actually weighs the quality m when raw material2
Are as follows: m2=m1/(1-w1%)]
As a kind of optimization, the cement in the compounding process a is portland cement or ordinary portland cement, and grade is not
Lower than 42.5 grades.
As a kind of optimization, quick lime in the ball milling process, the content of free calcium oxide is not less than 70wt%；River sand
SiO2Content is not less than 65%, and it is 15~25% that fineness, which is that 0.08mm square hole screen tails over,.
As a kind of optimization, river sand in the ball milling process, SiO2Content is not less than 65%, fineness 0.08mm
It is 15~25% that square hole screen, which tails over,.
As a kind of optimization, the foam stabilizer in the compounding process b is any one in Chinese honey locust powder, pull open powder and Tea Saponin
Kind.
Compared with prior art, the present invention has following technical effect that
1, the present invention replaces part lime and cement using steel slag tailing slurry, and desulfurization ash replaces part lime, gypsum and sand
Prepare air-entrained concrete building block, total volume of steel slag tailing slurry and desulfurization ash up to 65% (mass ratio) more than, solve steel
The Utilizing question of slag tail mud and desulfurization ash, while greatly reducing cost of material.
2, steel slag tailing slurry can be directly used in after being dehydrated without drying and prepare air entrained concrete block the present invention in the preparation
Block reduces drying cost.It can be seen that method provided by the present invention not only greatly reduces cost, but also simple process,
It is very suitable for industrial mass production.
3, the air-entrained concrete building block density prepared through the invention is low, thermal coefficient is low, sound insulation and compression strength performance
Good, properties of product reach the A3.5B06 class requirement of GB11968-2006 " autoclave aerated concrete building block ".
Specific embodiment
It elaborates below in conjunction with specific embodiment to the present invention, but the present invention is not limited to following embodiments.
Embodiment 1
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content less than 35% with belt type dewaterer, fineness 0.08mm
Square hole screen tails over 13.9%；
(2) ball milling process: it is 11.5% that desulfurization ash, which is milled to 0.08mm square hole screen and is tailed over, with ball mill, uses ball mill
It is 24.7% that river sand, which is milled to 0.08mm square hole screen and is tailed over, and it is 14.1% that quick lime, which is milled to 0.08mm square hole screen and tails over,.
(3) compounding process a: according to the ratio by steel slag tailing slurry, cement, quick lime, river sand, desulfurization ash, each raw material of waterglass
It is added in pulping equipment after metering, adds water and stirs and slurries 1 are made.In this example, in terms of dry material quality, every 100kg raw material
In include: steel slag tailing slurry 32.5kg, cement 8kg, quick lime 4kg, river sand 10kg, desulfurization ash 44kg and waterglass 1.5kg.Always
Amount of water is 62.5kg, and total amount of water includes the biodiversity brought into steel slag tailing slurry, waterglass and slurries 2, waterglass and water
It is added after mixing.In raw material, cement is portland cement or ordinary portland cement, and grade is not less than 42.5 grades, in quick lime
The content of free calcium oxide be not less than 70wt.%.
(4) compounding process b: according to the ratio by aluminium powder cream 0.09kg and pull open powder 0.05kg, add water to be made into mass fraction to be
Slurries 2 are added in slurries 1 and continue to stir into slurry by the slurries 2 of 6wt.%.
(5) foaming and it is quiet stop conserve process: slurry is injected into die for molding, and be sent to it is quiet stop fog room carry out foaming and
It is quiet to stop conserving, it is quiet to stop curing condition are as follows: quiet at 60 DEG C to stop maintenance 4 hours.
(6) hydro-thermal steam press maintenance process: above-mentioned operation shaping building block is sent in still kettle after demoulding, cutting and is steamed
Air-entrained concrete building block is made to conserve 7 hours in 170 DEG C of temperature of saturated vapor in pressure maintenance, the condition of the steam press maintenance.
Air-entrained concrete building block product is made in the present embodiment to test by GB/T 2542-2012 " Test methods for wall bricks "
The compression strength obtained is 4.6MPa, dry density 553kg/m3, drying shrinkage value 0.21mm/m, mass loss is 2.4% after jelly, is frozen
Compression strength 3.9MPa afterwards, dry state thermal coefficient are 0.091W/ (mK).Properties of product reach GB11968-2006, and " steam pressure adds
Gas concrete segment " A3.5B06 class requirement.
Embodiment 2
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content less than 35% with belt type dewaterer, fineness 0.08mm
Square hole screen tails over 14.3%；
(2) ball milling process: it is 13.4% that desulfurization ash, which is milled to 0.08mm square hole screen and is tailed over, with ball mill, uses ball mill
It is 17.6% that river sand, which is milled to 0.08mm square hole screen and is tailed over, and it is 14.5% that quick lime, which is milled to 0.08mm square hole screen and tails over,.
(3) compounding process a: according to the ratio by steel slag tailing slurry, cement, quick lime, river sand, desulfurization ash, each raw material of waterglass
It is added in pulping equipment after metering, adds water and stirs and slurries 1 are made.In this example, in terms of dry material quality, every 100kg raw material
In include: steel slag tailing slurry 32.5kg, cement 5kg, quick lime 8kg, river sand 15kg, desulfurization ash 37kg and waterglass 1.5kg.Always
Amount of water is 60kg, and total amount of water includes the biodiversity brought into steel slag tailing slurry, waterglass and slurries 2, and waterglass and water are mixed
It is added after conjunction.In raw material, cement is portland cement or ordinary portland cement, and grade is not less than 42.5 grades, in quick lime
The content of free calcium oxide is not less than 70wt.%.
(4) compounding process b: according to the ratio by aluminium powder cream 0.08kg and Chinese honey locust powder 0.03kg, add water to be made into mass fraction to be
Slurries 2 are added in slurries 1 and continue to stir into slurry by the slurries 2 of 3wt.%.
(5) foaming and it is quiet stop conserve process: slurry is injected into die for molding, and be sent to it is quiet stop fog room carry out foaming and
It is quiet to stop conserving, it is quiet to stop curing condition are as follows: quiet at 55 DEG C to stop maintenance 4 hours.
(6) hydro-thermal steam press maintenance process: above-mentioned operation shaping building block is sent in still kettle after demoulding, cutting and is steamed
Air-entrained concrete building block is made to conserve 6 hours in 190 DEG C of temperature of saturated vapor in pressure maintenance, the condition of the steam press maintenance.
After tested, manufactured air-entrained concrete building block properties of product can reach A3.B05 grade in the present embodiment.
Embodiment 3
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content less than 35% with belt type dewaterer, fineness 0.08mm
Square hole screen tails over 14.3%；
(2) ball milling process: it is 13.4% that desulfurization ash, which is milled to 0.08mm square hole screen and is tailed over, with ball mill, uses ball mill
It is 15.3% that river sand, which is milled to 0.08mm square hole screen and is tailed over, and it is 24.1% that quick lime, which is milled to 0.08mm square hole screen and tails over,.
(3) compounding process a: according to the ratio by steel slag tailing slurry, cement, quick lime, river sand, desulfurization ash, each raw material of waterglass
It is added in pulping equipment after metering, adds water and stirs and slurries 1 are made.In this example, in terms of dry material quality, every 100kg raw material
In include: steel slag tailing slurry 45kg, cement 3kg, quick lime 7kg, river sand 20kg, desulfurization ash 24kg and waterglass 1kg.Always add water
Amount is 60kg, and total amount of water includes the biodiversity brought into steel slag tailing slurry, waterglass and slurries 2, after waterglass is mixed with water
It is added.In raw material, cement is portland cement or ordinary portland cement, and grade is effective in quick lime not less than 42.5 grades
Calcium oxide content is not less than 70wt.%.
(4) compounding process b: according to the ratio by aluminium powder cream 0.07kg and Tea Saponin 0.02kg, add water to be made into mass fraction to be
Slurries 2 are added in slurries 1 and continue to stir into slurry by the slurries 2 of 3wt.%.
(5) foaming and it is quiet stop conserve process: slurry is injected into die for molding, and be sent to it is quiet stop fog room carry out foaming and
It is quiet to stop conserving, it is quiet to stop curing condition are as follows: quiet at 55 DEG C to stop maintenance 6 hours.
(6) hydro-thermal steam press maintenance process: above-mentioned operation shaping building block is sent in still kettle after demoulding, cutting and is steamed
Air-entrained concrete building block is made to conserve 8 hours in 170 DEG C of temperature of saturated vapor in pressure maintenance, the condition of the steam press maintenance.
After tested, air-entrained concrete building block properties of product made of the present embodiment can reach A3.5B06 grade.
Embodiment 4
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content less than 35% with belt type dewaterer, fineness 0.08mm
Square hole screen tails over 14.3%；
(2) ball milling process: it is 13.4% that desulfurization ash, which is milled to 0.08mm square hole screen and is tailed over, with ball mill, uses ball mill
It is 20.6% that river sand, which is milled to 0.08mm square hole screen and is tailed over, and it is 14.5% that quick lime, which is milled to 0.08mm square hole screen and tails over,.
(3) compounding process a: according to the ratio by steel slag tailing slurry, cement, quick lime, river sand, desulfurization ash, each raw material of waterglass
It is added in pulping equipment after metering, adds water and stirs and slurries 1 are made.In this example, in terms of dry material quality, every 100kg raw material
In include: steel slag tailing slurry 25kg, cement 7kg, quick lime 8kg, river sand 14kg, desulfurization ash 45kg and waterglass 1kg.Always add water
Amount is 65kg, and total amount of water includes the biodiversity brought into steel slag tailing slurry, waterglass and slurries 2, after waterglass is mixed with water
It is added.In raw material, cement is portland cement or ordinary portland cement, and grade is effective in quick lime not less than 42.5 grades
Calcium oxide content is not less than 70wt.%.
(4) compounding process b: according to the ratio by aluminium powder cream 0.06kg and pull open powder 0.04kg, add water to be made into mass fraction to be
Slurries 2 are added in slurries 1 and continue to stir into slurry by the slurries 2 of 4wt.%.
(5) foaming and it is quiet stop conserve process: slurry is injected into die for molding, and be sent to it is quiet stop fog room carry out foaming and
It is quiet to stop conserving, it is quiet to stop curing condition are as follows: quiet at 55 DEG C to stop maintenance 5 hours.
(6) hydro-thermal steam press maintenance process: above-mentioned operation shaping building block is sent in still kettle after demoulding, cutting and is steamed
Air-entrained concrete building block is made to conserve 7 hours in 180 DEG C of temperature of saturated vapor in pressure maintenance, the condition of the steam press maintenance.
After tested, air-entrained concrete building block properties of product made of the present embodiment can reach A3.5B06 grade.
Embodiment 5
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content less than 35% with belt type dewaterer, fineness 0.08mm
Square hole screen tails over 12.7%；
(2) ball milling process: it is 10.5% that desulfurization ash, which is milled to 0.08mm square hole screen and is tailed over, with ball mill, uses ball mill
It is 24.7% that river sand, which is milled to 0.08mm square hole screen and is tailed over, and it is 14.5% that quick lime, which is milled to 0.08mm square hole screen and tails over,.
(3) compounding process a: according to the ratio by steel slag tailing slurry, cement, quick lime, river sand, desulfurization ash, each raw material of waterglass
It is added in pulping equipment after metering, adds water and stirs and slurries 1 are made.In this example, in terms of dry material quality, every 100kg raw material
In include: steel slag tailing slurry 30kg, cement 6kg, quick lime 7kg, river sand 12kg, desulfurization ash 44kg and waterglass 1kg.Always add water
Amount is 62.5kg, and total amount of water includes the biodiversity brought into steel slag tailing slurry, waterglass and slurries 2, and waterglass is mixed with water
After be added.In raw material, cement is portland cement or ordinary portland cement, and grade is not less than 42.5 grades, having in quick lime
It imitates calcium oxide content and is not less than 70wt.%.
(4) compounding process b: according to the ratio by aluminium powder cream 0.05kg and Tea Saponin 0.05kg, add water to be made into mass fraction to be
Slurries 2 are added in slurries 1 and continue to stir into slurry by the slurries 2 of 5wt.%.
(5) foaming and it is quiet stop conserve process: slurry is injected into die for molding, and be sent to it is quiet stop fog room carry out foaming and
It is quiet to stop conserving, it is quiet to stop curing condition are as follows: quiet at 65 DEG C to stop maintenance 4 hours.
(6) hydro-thermal steam press maintenance process: above-mentioned operation shaping building block is sent in still kettle after demoulding, cutting and is steamed
Air-entrained concrete building block is made to conserve 8 hours in 170 DEG C of temperature of saturated vapor in pressure maintenance, the condition of the steam press maintenance.
After tested, air-entrained concrete building block properties of product made of the present embodiment can reach A3.5B06 grade.
Embodiment 6
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content less than 35% with belt type dewaterer, fineness 0.08mm
Square hole screen tails over 14.3%；
(2) ball milling process: it is 13.4% that desulfurization ash, which is milled to 0.08mm square hole screen and is tailed over, with ball mill, uses ball mill
It is 17.6% that river sand, which is milled to 0.08mm square hole screen and is tailed over, and it is 24.1% that quick lime, which is milled to 0.08mm square hole screen and tails over,.
(3) compounding process a: according to the ratio by steel slag tailing slurry, cement, quick lime, river sand, desulfurization ash, each raw material of waterglass
It is added in pulping equipment after metering, adds water and stirs and slurries 1 are made.In this example, in terms of dry material quality, every 100kg raw material
In include: steel slag tailing slurry 34kg, cement 6kg, quick lime 7kg, river sand 17kg, desulfurization ash 34kg and waterglass 2kg.Always add water
Amount is 65kg, and total amount of water includes the biodiversity brought into steel slag tailing slurry, waterglass and slurries 2, after waterglass is mixed with water
It is added.In raw material, cement is portland cement or ordinary portland cement, and grade is effective in quick lime not less than 42.5 grades
Calcium oxide content is not less than 70wt.%.
(4) compounding process b: according to the ratio by aluminium powder cream 0.06kg and Chinese honey locust powder 0.04kg, add water to be made into mass fraction to be
Slurries 2 are added in slurries 1 and continue to stir into slurry by the slurries 2 of 4wt.%.
(5) foaming and it is quiet stop conserve process: slurry is injected into die for molding, and be sent to it is quiet stop fog room carry out foaming and
It is quiet to stop conserving, it is quiet to stop curing condition are as follows: quiet at 60 DEG C to stop maintenance 5 hours.
(6) hydro-thermal steam press maintenance process: above-mentioned operation shaping building block is sent in still kettle after demoulding, cutting and is steamed
Air-entrained concrete building block is made to conserve 7 hours in 190 DEG C of temperature of saturated vapor in pressure maintenance, the condition of the steam press maintenance.
After tested, air-entrained concrete building block properties of product made of the present embodiment can reach A3.5B06 grade.
Embodiment 7
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content less than 35% with belt type dewaterer, fineness 0.08mm
Square hole screen tails over 14.3%；
(2) ball milling process: it is 13.4% that desulfurization ash, which is milled to 0.08mm square hole screen and is tailed over, with ball mill, uses ball mill
It is 17.6% that river sand, which is milled to 0.08mm square hole screen and is tailed over, and it is 14.5% that quick lime, which is milled to 0.08mm square hole screen and tails over,.
(3) compounding process a: according to the ratio by steel slag tailing slurry, cement, quick lime, river sand, desulfurization ash, each raw material of waterglass
It is added in pulping equipment after metering, adds water and stirs and slurries 1 are made.In this example, in terms of dry material quality, every 100kg raw material
In include: steel slag tailing slurry 36kg, cement 5kg, quick lime 6kg, river sand 15kg, desulfurization ash 36.5kg and waterglass 1.5kg.Always
Amount of water is 60kg, and total amount of water includes the biodiversity brought into steel slag tailing slurry, waterglass and slurries 2, and waterglass and water are mixed
It is added after conjunction.In raw material, cement is portland cement or ordinary portland cement, and grade is not less than 42.5 grades, in quick lime
The content of free calcium oxide is not less than 70wt.%.
(4) compounding process b: according to the ratio by aluminium powder cream 0.07kg and Chinese honey locust powder 0.04kg, add water to be made into mass fraction to be
Slurries 2 are added in slurries 1 and continue to stir into slurry by the slurries 2 of 3wt.%.
(5) foaming and it is quiet stop conserve process: slurry is injected into die for molding, and be sent to it is quiet stop fog room carry out foaming and
It is quiet to stop conserving, it is quiet to stop curing condition are as follows: quiet at 60 DEG C to stop maintenance 6 hours.
(6) hydro-thermal steam press maintenance process: above-mentioned operation shaping building block is sent in still kettle after demoulding, cutting and is steamed
Air-entrained concrete building block is made to conserve 7 hours in 170 DEG C of temperature of saturated vapor in pressure maintenance, the condition of the steam press maintenance.
After tested, air-entrained concrete building block properties of product made of the present embodiment can reach A3.5B06 grade.
Claims (5)
1. a kind of method for preparing air-entrained concrete building block using steel slag tailing slurry and desulfurization ash, which is characterized in that this method packet
Include following process:
(1) dehydration procedure: steel slag tailing slurry is dehydrated to moisture content and is no more than 35%；It is broken that the steel slag tailing slurry refers to that steel slag passes through
With after wet ball grinding using remaining tail mud after magnetic separation recovery fe therein and iron-bearing mineral, granularity requirements 0.08mm
Square hole screen is tailed over no more than 15%；
(2) river sand, desulfurization ash and quick lime ball milling process: are milled to the fineness of requirement respectively；The desulfurization ash refers to
Circulating fluidized bed boiler use furnace sorbent injection desulfurization technique generate flying dust and clinker, after ball milling to fineness be the side 0.08mm
Hole sizer is tailed over no more than 15%；The quick lime fineness is that 0.08mm square hole screen is tailed over no more than 25%；The river sand fineness is
It is 15~25% that 0.08mm square hole screen, which tails over,；
(3) compounding process a: after waterglass, water, cement and the dewatered steel slag tailing slurry of step (1) and step (2) ball milling
River sand, desulfurization ash, quick lime mixing plant is added after measuring in proportion, slurries 1 are made under vigorous stirring；
(4) compounding process b: weighing foam stabilizer and aluminium powder cream in proportion, and adds them into water the slurries that 3~6wt% is made
2, then the slurries 2 are added in slurries 1 and are sufficiently stirred, slurry is made；
(5) foaming stops conserving process with quiet: the injection die for molding of slurry made from step (4) being formed building block, and is sent out
Bubble stops conserving with quiet；It is described quiet to stop curing condition are as follows: quiet at 55~65 DEG C to stop maintenance 4~6 hours；
(6) hydro-thermal steam press maintenance process: step (5) building block after molding is sent into still kettle after demoulding, cutting and is steamed
Pressure maintenance；The condition of the steam press maintenance are as follows: conserved 6~8 hours in the saturated vapor that 170~190 DEG C of temperature, it is mixed that aerating is made
Solidifying earth building blocks；
Wherein: in the compounding process a, in terms of dry material quality, every 100kg mixture contains: 25~45kg of steel slag tailing slurry,
3~8kg of cement, 4~8g of quick lime, 10~20kg of river sand, 24~45kg of desulfurization ash, 1~2kg of waterglass；
In the compounding process b, the mixture in every 100kg compounding process a adds aluminium powder 0.05~0.09kg of cream, foam stabilizer again
0.02~0.05kg；
In above-mentioned operation, total amount of water is the sum of the water that each material is included in amount of water and raw material, accounts for mixture with dry
The 60~65% of material meter gross mass.
2. a kind of method for preparing air-entrained concrete building block using steel slag tailing slurry and desulfurization ash as described in claim 1
In, which is characterized in that the cement in the compounding process a is portland cement or ordinary portland cement, and grade is not less than
42.5 grades.
3. a kind of method for preparing air-entrained concrete building block using steel slag tailing slurry and desulfurization ash as described in claim 1
In, which is characterized in that the quick lime in the ball milling process, the content of free calcium oxide are not less than 70wt%；The SiO of river sand2
Content is not less than 65%, and it is 15~25% that fineness, which is that 0.08mm square hole screen tails over,.
4. a kind of method for preparing air-entrained concrete building block using steel slag tailing slurry and desulfurization ash as described in claim 1
In, which is characterized in that the river sand in the ball milling process, SiO2Content is not less than 65%, and fineness is 0.08mm square hole screen
Tail over is 15~25%.
5. a kind of method for preparing air-entrained concrete building block using steel slag tailing slurry and desulfurization ash as described in claim 1
In, which is characterized in that the foam stabilizer in the compounding process b is any one in Chinese honey locust powder, pull open powder and Tea Saponin.
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| CN107324844A (en) * | 2017-05-18 | 2017-11-07 | 商洛学院 | A kind of method of the clay standby air-entrained concrete building block of steel scoria magnetic separation tail |
| CN108218365A (en) * | 2017-12-06 | 2018-06-29 | 中国十七冶集团有限公司 | A kind of method that steam-pressing brisk is prepared using steel scoria magnetic separation tail mud and commercial lime |
| CN110436954A (en) * | 2019-07-26 | 2019-11-12 | 江苏禾吉新材料科技有限公司 | A kind of preparation method of autoclave aerated concrete building block |
| CN111499329B (en) * | 2020-04-30 | 2022-06-07 | 安徽工业大学 | Autoclaved sand-lime brick containing steel slag tail mud and preparation method thereof |
| CN112476751A (en) * | 2020-12-01 | 2021-03-12 | 湖北理工学院 | Production line for preparing concrete blocks |
| CN113105195A (en) * | 2021-02-24 | 2021-07-13 | 黄石市旺新环保科技有限公司 | Foam concrete block manufactured by utilizing solid waste and preparation method thereof |
| CN113831033B (en) * | 2021-07-30 | 2022-11-08 | 中国矿业大学(北京) | Desulfurized fly ash-steel slag composite gelled composition and desulfurized fly ash-steel slag composite gelled material |
| CN113698229A (en) * | 2021-09-15 | 2021-11-26 | 浙江天地环保科技股份有限公司 | Process for maintaining fly ash aerated building block by coupling steam and carbon dioxide |
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