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 PDF

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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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steel slag
building block
desulfurization ash
tailing slurry
concrete building
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CN106365674A (en
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盛广宏
汪亚伟
王诗生
贾勇
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Anhui University of Technology AHUT
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/02Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/0418Wet materials, e.g. slurries
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/06Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/06Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08Flue dust, i.e. fly ash
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24Compositions 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
    • C04B28/26Silicates of the alkali metals
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32Mortars, 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a kind of methods for preparing air-entrained concrete building block using steel slag tailing slurry and desulfurization ash, belong to solid waste technical field of comprehensive utilization.This method with steel scoria magnetic separation tail mud, desulfurization ash, cement, lime, sand, aluminium powder cream, foam stabilizer etc. for raw material, by stirring pulping, molding, it is quiet stop maintenance and the processes such as steam press maintenance, air-entrained concrete building block is prepared.The present invention replaces part lime and cement using steel slag tailing slurry, desulfurization ash replaces part lime, gypsum and sand to prepare air-entrained concrete building block, total volume of steel slag tailing slurry and desulfurization ash up to 65% (mass ratio) more than, it solves the Utilizing question of steel slag tailing slurry and desulfurization ash, while greatly reducing cost of material.The air-entrained concrete building block density prepared through the invention is low, thermal coefficient is low, sound insulation and compression strength performance are good, and properties of product reach the A3.5B06 class requirement of GB11968-2006 " autoclave aerated concrete building block ".

Description

A method of air-entrained concrete building block is prepared using steel slag tailing slurry and desulfurization ash
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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