CN105174765B - The method producing construction sand and active ground-slag with water quenching schreyerite slag - Google Patents
The method producing construction sand and active ground-slag with water quenching schreyerite slag Download PDFInfo
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- CN105174765B CN105174765B CN201510602408.0A CN201510602408A CN105174765B CN 105174765 B CN105174765 B CN 105174765B CN 201510602408 A CN201510602408 A CN 201510602408A CN 105174765 B CN105174765 B CN 105174765B
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- 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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The method producing construction sand and active ground-slag with water quenching schreyerite slag, comprises the following steps：（1）The shaping of water quenching schreyerite solid impurity particle is modified；（2）Sand and the separation of granulated slag：Mixture containing thicker hard particles material and granulated slag is separated into the sand material of particle diameter >=0.15mm and particle diameter is less than the granulated slag of 0.15mm；Sand as built by the sand material of gained particle diameter >=0.15mm；（3）The preparation of active ground-slag：It is granulated slag 50～90% in mass ratio that the particle diameter of gained is less than the granulated slag of 0.15mm and adjuvant, activated grinding aids:Adjuvant 10～50%:The ratio dispensing of activated grinding aids 0.05～3%, combined grinding tails over to 80 μm<12% fine powder, obtains final product active ground-slag.Using the present invention, resourcebility makes full use of the component of the different qualities in water quenching schreyerite slag, produces high-quality construction sand and active ground-slag supply concrete mixing plant and civilian mortar and cement manufacturers, good economy performance.
Description
Technical field
The present invention relates to a kind of method that water quenching schreyerite slag produces construction sand and active ground-slag.
Background technology
The molten blast furnace slag producing during smelting vanadium-titanium magnetite by blast furnace is referred to as schreyerite slag, and outward appearance is typically brown, close
Degree 3.24g/cm3, radioactive indicator Ira 0.1～0.2 inside and outside schreyerite slag, Ir 0.08～0.12, far below national standard rule
Fixed Ira 1.0, Ir 1.0, can be used in unrestricted under any environmental condition.
Schreyerite slag divides water quenching chilling and natural 2 kinds of slags of slow cooling, is low calcium Ti-enriched slag, the silicon of its slagging, aluminum, ferrum, calcium,
The mineral group such as magnesium is subject to affinity strong and crystallizes the strong TiO of tendency2Impact it is extremely difficult to generate dicalcium silicate, calcium aluminate class hydraulic
Property mineral, be totally different from ordinary blast water-granulated slag, either water quenching chilling or natural slow cooling, its mineral facies base being formed
This is identical, and its main petrofacies mineral is perovskite（CaO·TiO2）, diopside（MgO·CaO·2SiO2）Or titanaugite（MgO·
CaO·2TiO2）, spinelle（MgO·Al2O3), Ba Yishi and a small amount of titanium nitride, titanium carbide, titanium carbonitride solid solution and hidden
Crystalloid etc., the Muscovitum often having without natural mountain sand, fluvial sand, clay mineral.Chemical analysis（%）Fluctuation is in TiO211.8～
24.5, CaO 19.6～30, SiO218.6～25, Al2O310.5～16.5, MgO 3.5～8.5, MnO 0.5～1.0, FeO
0.9～2.0, S 0.12～0.8, V2O50.12～0.55.Just because of its Ti content is higher, on the one hand, vanadium titanium water-granulated slag was both
Can not be simply to produce slag cements as ordinary blast slag, substantial amounts of analysis of experiments shows：Even with ultra-fine
The vanadium titanium water-granulated slag of grinding and the composite gelled material of portland cement, its cementitious matter hardenite knot under room temperature curing condition
Structure is loose, and its hydrated product is mainly what hydrated cementitious provided, and schreyerite solid impurity particle surface substantially " is not corroded ", schreyerite
The activity of slag extremely difficult to eject, only under the conditions of the high-temperature steam curing that exciting agent exists, schreyerite solid impurity particle surface except
Have outside hydrolysis product of cement CSH gel and single sulfur type hydrated calcium aluminate sulfate of lamellar, just have obvious " erosion " phenomenon.The opposing party
Face, but because the titanium grade of schreyerite slag not high enough it is also difficult to the raw material as Ti industry of economy.
Molten blast furnace slag in atmosphere natural cooling formed a kind of by the stone material based on the mineral such as titanaugite, perovskite
Material, in compact massive structure, often referred to simply as high-titanium dry slag, has porous, the features such as high-strength, chemical stability is good, can replace
It is used as aggregate for building stones.High-titanium dry slag China accumulating amount over the years reaches several hundred million tons, takes up an area tens thousand of mus, effect on environment is relatively
Greatly.Currently, Ma Gang, Anshan iron and steel plant, Wuhan Iron and Steel Plant, climb steel etc. by machined for vanadium titanium dry slag graded crushing, to make dry slag broken for sorting
Stone and a small amount of slag sand are used for engineering concrete building stones and sand material, its obtained heavy titanium ore debris coarse aggregate（Building stones）Particle diameter leads to
It is often the continuous grading of 5～40mm, apparent density 2.65～2.85g/cm3, bulk density 1320～1470kg/m3, obtained
Weight titanium ore debris fine aggregate（Sand material）Powder containing quantity 9～15%, modulus of fineness 2.8～3.4, apparent density 3.09～3.19g/cm3,
Bulk density 1590～1780kg/m3, Titanium slag sand material is relatively costly again.
Molten blast furnace slag in（1510～1630 DEG C）Direct water quenching chilling can be formed based on spongiform foam grain slag
Porous light slag, in（1350～1450 DEG C）With can forming part hard particles shape resistant mineral and pars during water quenching chilling
Shape foamed slag, abbreviation water quenching schreyerite slag.The granulation schreyerite slag of water quenching is in loose structure, and its rough surface, corner angle are neat, strong
Degree is relatively low, but hard, the difficult mill of the stable phase mineral grain such as its perovskite.Its grade is partially thinner than natural medium coarse sand（Partially medium-fine sand it
Between, be equivalent to nature medium sand）, in 2.53～3.55mm, typically in 5mm, particle diameter is in 0.15mm for maximum particle diameter for mean diameter
Following grain slag powder and tender froth granule typically up to 15～48%.The neat coarse table of this corner angle of water quenching schreyerite slag sand
The construction featuress of face and porous simultaneously contain a considerable amount of grain slag micropowders and tender froth slag feature so that it has following difference
In normal concrete tradition fine aggregate（Artificial stone sand and natural siliceous sand）Characteristic：
1）The mineral composition of water quenching schreyerite slag sand material is relative stable phase mineral perovskite, titanaugite etc., and natural sand
Silicon dioxide for compact crystallization.Different mineral compositions has determined different types of material behavior, different types of sand pair
The original operating state of concrete and mechanical property all have considerable influence.
2）Water quenching schreyerite slag sand material has the loose structure of coarse angular surface, and water absorption is big, air content is also big.If straight
Connect for normal concrete, on the one hand need to increase the water consumption of concrete proportioning, also need to increase the actual use of concrete admixture
Amount, this brings many puzzlements and inconvenience to the dispensing construction of normal concrete；On the other hand, porous leads to contain one in hole
Quantitative air, the coarse surface and relative increase denseness of slurry, is unfavorable for the migration to surface for the inside concrete bubble,
Lead to the air content more natural sand concrete height of water-granulated slag sand concrete.
3）Water quenching schreyerite slag sand material contains considerable amount of grain slag micropowder and tender froth slag, objectively makes water quenching vanadium titanium
Slag sand is simply possible to use in the concrete of below C20 label, then needs to increase cement for conventional C30, C40 and high-grade concrete
Consumption and increase concrete admixture consumption, and extender need to be used, low grade lean concrete is also needed to increase cement use
Amount, and early strength, the condensation firm time of prolongation concrete can be reduced.
4）The mineral ratio of water quenching schreyerite slag sand material is great, and unit weight is light, and its proportion is in 2380～2880Kg/m3, typically
Do closely knit unit weight and be only 650～900Kg/m3, loose dry specific gravity is 580～800Kg/m3, voidage 58～78%.And natural sand ratio
Focus on 2600～2800Kg/m3, loose dry specific gravity is in 1450～1650Kg/m3, voidage ＜ 45%.Its appearance of water quenching schreyerite slag sand
The change of weight and voidage is all much bigger than natural sand, and this brings quite to the mix designs of normal concrete and engineer applied
Trouble and certain risk.The concrete mix unit weight that it is prepared is also light, lighter by 15 than normal concrete mixture unit weight～
25%, even mortar mixture unit weight（Typically in 1080～1550Kg/m3）Also light by 28 than ordinary mortar mixture unit weight～
45%.
5）The structure of water quenching schreyerite slag sand material porous and containing partly weak foamed slag material characteristics so that its concrete
The axial tensile strength of sensitivity, rupture strength and pressure-proof elasticity modulus be less than 5～20% of the normal concrete with label, especially
It is its pressure-proof elasticity modulus less than existing《Reinforced concrete structural design specification》（GB50010-2010）Require.
These geneogenous characteristic defectives above-mentioned are exactly because of the substantial amounts of foamed slag of association, powder when water quenching schreyerite slag is formed
The complete corner angle of slag and particulate material cause totally unfavorable shadow to the application property of concrete and the physical and mechanical property of concrete
Ring so that the recycling of the water quenching schreyerite slag sand shape material of this mineral facies quite stable is suppressed by essence, remove
Outside the heavy Titanium slag sand of high rigidity of densification, the application of stone, ignore the substantial amounts of pilot study of these congenital characteristic defectives
Achievement, especially substitutes concrete with water quenching schreyerite slag and the long-term achievement in research of mortar natural sand still can only stop
In the identification achievement of paper or various kinds.Objectively, each smelts 50 kilometers of the large blast furnace enterprise periphery of vanadium titano-magnetite
In the range of all pile up have ten million ton meter water quenching schreyerite slag, environment is caused with very important pollution.
On the other hand, recent decades large-scale capital construction Sand for Concrete, leads to the high-quality in China's major part region
Natural sand resource almost exhausts, and causes huge destruction to environment, and the widely used clay content in existing subregion such as Yunnan is high
Mountain sand, the high sea sand of coastal widely used salinity, cause the concrete works of many huge investments to become life cycle big
The cancer engineering that width shortens.
Therefore, in the urgent need to a kind of resourcebility using based on the mineral such as the good inert perovskite of chemical stability
Water quenching schreyerite slag simultaneously can save the new method of nature sand resource.
Content of the invention
The technical problem to be solved is to provide one kind water quenching schreyerite slag and produces construction sand and active slag
The method of powder, is caused jointly with solving the foamed slag of weak structure and granulated slag and the complete corner angle of hard particles in water quenching schreyerite slag
Congenital characteristic defective and comprehensive utilization water quenching schreyerite slag in tender froth slag and granulated slag.
The technical solution adopted for the present invention to solve the technical problems is：Produce construction sand and work with water quenching schreyerite slag
The method of property ground-slag, comprises the following steps：
（1）The shaping of water quenching schreyerite solid impurity particle is modified：Water quenching schreyerite slag is pulverized with grinding or shock or spreading mode
In tender froth slag and eliminate the part sharp corners of hard particles, water quenching schreyerite slag is made containing harder
Pellet and the mixture of granulated slag；
（2）Sand and the separation of granulated slag：By step（1）The mixture containing thicker hard particles material and granulated slag of gained is separated into
The sand material of the particle diameter >=0.15mm and particle diameter granulated slag less than 0.15mm；
The sand material of gained particle diameter >=0.15mm is construction sand, and alternative natural sand is used for normal concrete, also can make
It is used for lightweight aggregate concrete for lightweight sand；
（3）The preparation of active ground-slag：By step（2）The particle diameter of gained is less than granulated slag and adjuvant, the activation grinding aid of 0.15mm
Agent is granulated slag 50～90% in mass ratio:Adjuvant 10～50%:The ratio dispensing of activated grinding aids 0.05～3%, three's quality proportioning
Sum is 100%, combined grinding tails over to 80 μm≤12% fine powder, and obtain final product active ground-slag.
Further, step（1）In, described lapping mode refers to for water quenching schreyerite slag to be continuously introduced into draw ratio ＜ 2.5
Ball mill（I.e. short mill or ultrashort mill）Interior slightly grinding tender froth slag therein and grinding away hard with bead or forging
The part sharp corners of granule.
Further, step（1）In, described shock mode refers to spurt in volute by water quenching schreyerite slag or is placed in star
In blender or be placed in conical agitator or be placed in the agitator of belt grinding body, using water quenching schreyerite slag and antifriction metal (AFM)
Inwall clash into and friction and water quenching schreyerite solid impurity particle between mutual shock and frictional force pulverize tender froth slag therein,
And eliminate the sharp corners of part hard particles.
Further, step（1）In, described spreading mode refers to roll over mixing apparatus spreading water quenching schreyerite using little pressure wheel
Slag, pulverizes tender froth slag therein with the frictional force between the slight spreading of rolling wheel and water quenching schreyerite solid impurity particle and eliminates
Fall the sharp corners of part hard particles.
Further, step（2）In, described separation finger is with Powder selecting mechanism sorting or using vibrosieve or rotary screen sieve
Point.
Further, step（3）In, described adjuvant refers to slag, silicon ash, kieselguhr, belite-anhydrite matured slag, Baily
Spy-aluminium sulfate matured slag, aluminate clinker, sulfoaluminate clinker and containing in material based on calcium aluminate or calcium sulfoaluminate minerals etc.
At least one.
Further, step（3）In, described activated grinding aids are the commercially available activated grinding aids containing hydramine etc..
Further, step（1）In, add account for water quenching schreyerite slag mass ratio 0.03～3% granule modified dose.Described
Granule modified dose of finger can improve the material of hard particles thing surface characteristic and/or architectural characteristic in water quenching schreyerite slag, preferred alcohols
One or more of amine, silane, waterglass, sodium aluminate solution etc..
The know-why of the present invention：
For water quenching chilling schreyerite slag objectively by hard graininess resistant mineral, spongy foam slag and granulated slag
The mixture of composition, and slag particle be in loose structure, rough surface, corner angle are neat and bulk strength is relatively low, but its perovskite etc. is steady
Determine that phase mineral grain is hard, the feature of difficult mill, using grinding or clash into or spreading mode pulverizes the weakness in water quenching schreyerite slag
Foamed slag simultaneously eliminates the part sharp corners of hard particles, makes foamed slag and sharp corners and primary granulated slag be converted into grain
Footpath is less than the granulated slag of 0.15mm, then, removes granulated slag, by water quenching schreyerite slag shaping modification make thicker be easy to prepare common
The hard particles sand material of the cleaning of concrete or mortar, thus dissolve the substantial amounts of foamed slag because of association, primary granulated slag and
The adverse effect that the complete corner angle of grain cause to the application property of concrete and the physical and mechanical property of concrete, and with detached phase
Make active ground-slag based on the granulated slag that a certain amount of vitreous body active mineral is contained in below 0.15mm to the particle diameter of easy mill, reach money
Sourceization utilizes the purpose of water quenching schreyerite slag.
Beneficial effects of the present invention：
1）Method is simple, and power consumption of polymer processing is low, and processing cost is relatively low.
2）Resourcebility makes full use of the component of the different qualities in water quenching schreyerite slag, produces high-quality construction sand and work
Property ground-slag supply concrete mixing plant and civilian mortar and cement manufacturers, good economy performance.
3）Beneficial to mitigation environmental pollution, and reduce out the destruction to environment for the natural sand resource.
Specific embodiment
The invention will be further described with reference to embodiments.
In following examples water quenching schreyerite slag modification sand physical and mechanical property detection according to《Regular concrete sand matter
Amount standard and the method for inspection》（JGJ52-2006）With《Construction sand》（GB/T14684-93）；
The initialization performance of concrete：The concrete mix slump, divergence test according to《Normal concrete mix
Physical performance test method standard》（GB/T50080-2002）；
Concrete general physics mechanics performance（Intensity, elastic modelling quantity）Test according to《Normal concrete mechanical property test
Method》（GB/T50081-2002）；
Concrete is from volume contraction distortion（Limited expansion rate, free swelling rate, Creep Coefficient）Test according to《Common coagulation
Native long-term behaviour and endurance quality test method》（GB/T50082-2009）；
Compressive elastic modulus of concrete test according to《Reinforced concrete structural design specification》（GB50010-2010）；
The detection of active ground-slag according to《For the ground granulated blast furnace slag in cement and concrete》（GB/T18046-2008）、
《For the steel-making slag powder in cement and concrete》（GB/T20491-2006）.
Embodiment 1
Take certain gully slag field to display the water quenching schreyerite slag of natural drying for many years, with following steps produce construction sand and
Active ground-slag：
（1）The shaping of water quenching schreyerite solid impurity particle is modified：Water quenching schreyerite slag is continuously introduced into the ultrashort of Φ 2.8x3.8m
Slightly grinding tender froth slag therein and grinding away the part sharp corners of hard particles with small ball, system in mill
Become the mixture containing thicker hard particles material and granulated slag；
（2）Sand and the separation of granulated slag：By step（1）The mixture containing thicker hard particles material and granulated slag of gained is using shaking
Dynamic sieve is separated into the sand material of particle diameter >=0.15mm and particle diameter is less than the granulated slag of 0.15mm；
The sand material of gained particle diameter >=0.15mm is construction sand, can be used for concrete or mortar；
（3）The preparation of active ground-slag：
From commercially available calcium sulphoaluminate grog and silicon ash as adjuvant, the ZC type from commercially available Zi Chen company activates grinding aid
Agent, by step（2）It is granulated slag 89% in mass ratio that the particle diameter of gained is less than the granulated slag of 0.15mm and adjuvant, activated grinding aids:Adjuvant
（Sulfoaluminate clinker 7%+ silicon ash 3.9%）10.9%:The ratio dispensing of activated grinding aids 0.1%, combined grinding tails over 8% to 80 μm
Fine powder, obtain final product active ground-slag.
The particle diameter of schreyerite slag modification sand obtained by the present embodiment is the continuous grading of 0.15～4.1mm, powder containing quantity 0.9%,
Without the harmful substances such as Muscovitum, mud class, modulus of fineness 2.7, it is mostly quasi-circular hard particles, there is minute aperture on surface, proportion is
3023Kg/m3, doing closely knit unit weight is 1269Kg/m3, loose dry specific gravity is 1197Kg/m3, voidage 38%, modified sand robustness is used
Metabisulfite solution sense weight loss 5.2%, in sand material, sulfide and sulphates content press SO3It is calculated as 0.72%.Existed with this heap
Schreyerite slag modification sand equal-volume on wetland face substitutes fluvial sand preparation C30, C40, C50 concrete that modulus of fineness is 2.65 and enters
Row test, the workability of modified sand concrete is good compared with river sand concrete, does not isolate, not bleeding, and the slump, divergence and fluvial sand mix
Solidifying soil is quite；Cube unit weight is light compared with river sand concrete unit weight by 4.7%, and 7d, 28d modification compression strength of sand concrete mixes compared with fluvial sand
Solidifying soil mean compressive strength is respectively increased 5.7%, 8.4%, 28d pressure-proof elasticity modulus quite, rupture strength and axial tensile strength
Quite, the limited expansion rate of 1d, 3d, 7d, 14d, 28d, 60d age, free swelling rate are suitable, corresponding age modification sand concrete
Creep Coefficient averagely reduce by 27% compared with river sand concrete, averagely improve 27.1% with reinforcing bar cohesive force compared with river sand concrete.Test
Result shows, the main physico-mechanical performance of schreyerite slag modification sand concrete reaches or is better than river sand concrete, schreyerite slag
Modified sand serviceability is better than common fluvial sand, and modified sand can fully meet the requirement as construction sand.
Supply certain civil engineering with this modified schreyerite slag sand to build a house, user feedback has good workability, not running pulp not bleeding,
Intensity is good.
Water demand ratio is 101% to the active ground-slag of gained after testing, respectively reaches S75 grade slag powder strength criterion, S95 level
Steel-making slag powder strength criterion.Supply certain grinding station and directly mix and join 42.5 class g cements, the quality testing index of user feedback cement is normal.
Embodiment 2
Take the water quenching schreyerite slag that certain slag field spontaneously dries, produce construction sand and active ground-slag with following steps：
（1）The shaping of water quenching schreyerite solid impurity particle is modified：Water quenching schreyerite slag is continuously introduced into the short mill of Φ 3.8x4.2m
Interior, meanwhile, be continuously added to account for the hydramine of water quenching schreyerite slag amount 0.05% and 0.45% sodium aluminate solution whole as granule
Shape modifying agent, with slightly the grinding tender froth slag therein and grind away the part of hard particles of small ball in short mill
Sharp corners, make the mixture containing thicker hard particles material and granulated slag；
（2）Sand and the separation of granulated slag：By step（1）The mixture containing thicker hard particles material and granulated slag of gained is using choosing
Powder machine is separated into the sand material of particle diameter >=0.15mm and particle diameter is less than the granulated slag of 0.15mm；
The sand material of gained particle diameter >=0.15mm is construction sand；
（3）The preparation of active ground-slag：
From commercially available calcium sulphoaluminate grog and slag as adjuvant, the ZC type from commercially available Zi Chen company activates grinding aid
Agent, by step（2）It is granulated slag 70% in mass ratio that the particle diameter of gained is less than the granulated slag of 0.15mm and adjuvant, activated grinding aids:Adjuvant
（Sulfoaluminate clinker 8%+ slag 21%）29%:The ratio dispensing of activated grinding aids 1%, combined grinding to 80 μm tail over 3% thin
Powder, obtains final product active ground-slag.
The particle diameter of schreyerite slag modification sand obtained by the present embodiment is the continuous grading of 0.15～3.8mm, powder containing quantity 3.2%,
Without the harmful substances such as Muscovitum, mud class, modulus of fineness 2.42, it is mostly quasi-circular hard particles, there is minute aperture on surface, proportion is
3109Kg/m3, doing closely knit unit weight is 1363Kg/m3, loose dry specific gravity is 1287Kg/m3, voidage 35%, modified sand robustness is used
Metabisulfite solution sense weight loss 3.7%, in sand material, sulfide and sulphates content press SO3It is calculated as 0.68%.Existed with this heap
Schreyerite slag modification sand equal-volume on wetland face substitutes the fluvial sand that modulus of fineness is 2.51 and prepares C20, C30, C40, C50 coagulation
Soil is tested, and the workability of modified sand concrete is good compared with river sand concrete, does not isolate, not bleeding, the slump, divergence and river
Sand concrete is suitable；Cube unit weight is light compared with river sand concrete unit weight by 4.1%, and 7d, 28d modification compression strength of sand concrete is compared with river
Sand concrete mean compressive strength is respectively increased 7.3%, 9.6%, 28d pressure-proof elasticity modulus and averagely improves compared with river sand concrete
11.1%, quite, the limited expansion rate of 1d, 3d, 7d, 14d, 28d, 60d age, free swelling rate are suitable, phase for axial tensile strength
The Creep Coefficient answering age modification sand concrete averagely reduces by 27% compared with river sand concrete, with reinforcing bar cohesive force compared with river sand concrete
Average raising 30.1%.Result of the test shows, the main physico-mechanical performance of schreyerite slag modification sand concrete reaches or is better than river
Sand concrete, schreyerite slag modification sand serviceability is better than common fluvial sand.
With this modified schreyerite slag sand supplied goods concrete mixing plant, user feedback workability is good, and running pulp is not
Bleeding, intensity is good.
Water demand ratio is 99% to the active ground-slag of gained after testing, respectively reaches S75 grade slag powder strength criterion and S95 level
Steel-making slag powder strength criterion.Supply certain Concrete Mixing Station as active ground-slag, feedback and commercially available common water quenching slag powders
Using effect is suitable.
Embodiment 3
Take the water quenching schreyerite slag that certain steel mill is fresh, produce construction sand and active ground-slag with following steps：
（1）The shaping of water quenching schreyerite solid impurity particle is modified：Water quenching schreyerite slag is sprayed into Scroll with sandblasting machine high speed hold
In device, through ten circulation sandblastings with the shock of the mode of clashing into and frictional force pulverize tender froth slag in water quenching schreyerite slag and
Dispose the part sharp corners of hard particles, make the mixture containing thicker hard particles material and granulated slag；
（2）Sand and the separation of granulated slag：By step（1）The mixture containing thicker hard particles material and granulated slag of gained is using shaking
Dynamic sieve is separated into the sand material of particle diameter >=0.15mm and particle diameter is less than the granulated slag of 0.15mm；
The sand material of gained particle diameter >=0.15mm is construction sand；
（3）The preparation of active ground-slag：
From commercially available aluminate clinker and kieselguhr as adjuvant, the ZC type from commercially available Zi Chen company activates grinding aid
Agent, by step（2）After the granulated slag less than 0.15mm for the particle diameter of gained is dried, it is dry powder in mass ratio with adjuvant, activated grinding aids
Slag 52%:Adjuvant（Aluminate clinker 8%+ kieselguhr 37%）45%:The ratio dispensing of activated grinding aids 3%, combined grinding sieves to 80 μm
Remaining be 2% fine powder, obtain final product active ground-slag.
The particle diameter of schreyerite slag modification sand obtained by the present embodiment is the continuous grading of 0.15～4.0mm, powder containing quantity 2.1%,
Without the harmful substances such as Muscovitum, mud class, modulus of fineness 2.23, it is mostly irregular hard particles, there is minute aperture on surface, proportion is
2972Kg/m3, doing closely knit unit weight is 1214Kg/m3, loose dry specific gravity is 1071Kg/m3, voidage 43.9%, modified sand robustness
Lose 6.1% with metabisulfite solution sense weight, in sand material, sulfide and sulphates content press SO3It is calculated as 0.83%.Stored up with this
Schreyerite slag modification sand equal-volume on wetland face substitutes the fluvial sand that modulus of fineness is 2.32 and prepares C20, C30, C40 concrete
Tested, the workability of modified sand concrete is good compared with river sand concrete, do not isolated, not bleeding, the slump, divergence and fluvial sand
Concrete is suitable；Cube unit weight is averagely light by 6.9% compared with river sand concrete unit weight, and 7d, 28d modification compression strength of sand concrete is relatively
Quite, 28d pressure-proof elasticity modulus averagely improve 7.6% compared with river sand concrete to river sand concrete comprcssive strength, axial tensile strength phase
When the limited expansion rate of 1d, 3d, 7d, 14d, 28d, 60d age, free swelling rate are suitable, corresponding age modification sand concrete
Creep Coefficient averagely reduces by 21%, averagely improves 19.7% with reinforcing bar cohesive force compared with river sand concrete.Result of the test shows, schreyerite
Slag modification sand concrete main physico-mechanical performance reach or be better than river sand concrete, schreyerite slag modification sand serviceability with
Common fluvial sand quite, can be used as high-quality construction sand.
Water demand ratio is 102% to the active ground-slag of gained after testing, reaches S75 grade slag powder strength criterion.Try out in product
Station-service, in controlling the water circulation adobe, user feedback workability good water-retaining property, does not ftracture, intensity is good.
Embodiment 4
Take the water quenching schreyerite slag of the natural drying that certain gully slag field displays, produce construction sand material and work with following steps
Property ground-slag：
（1）The shaping of water quenching schreyerite solid impurity particle is modified：Water quenching schreyerite slag is placed in Double helix conical agitator, with
When first Deca account for the silane of water quenching schreyerite slag mass ratio 0.03%, then Deca accounts for the inclined aluminum of water quenching schreyerite slag mass ratio 0.5%
Acid sodium solution, pulverizes tender froth slag therein with the frictional force between slag and grinds away the part sharp edges of hard particles
Angle, makes the mixture containing thicker hard particles material and granulated slag；
（2）Sand and the separation of granulated slag：By step（1）The mixture containing thicker hard particles material and granulated slag of gained is using shaking
Dynamic sieve is separated into the sand material of particle diameter >=0.15mm and particle diameter is less than the granulated slag of 0.15mm；
The sand material of gained particle diameter >=0.15mm is construction sand；
（3）The preparation of active ground-slag：
From commercially available belite-calcium sulphoaluminate grog and silicon ash as adjuvant, from the ZC type of commercially available Zi Chen company
Activated grinding aids, by step（2）It is granulated slag in mass ratio that the particle diameter of gained is less than the granulated slag of 0.15mm and adjuvant, activated grinding aids
65%:Adjuvant（Belite-calcium sulphoaluminate grog 25%+ silicon ash 9.9%）34.9%:The ratio dispensing of activated grinding aids 0.1%, mixing
Grinding to 80 μm tail over 5% fine powder, obtain final product active ground-slag.
The particle diameter of schreyerite slag modification sand obtained by the present embodiment is the continuous grading of 0.15～3.6mm, powder containing quantity 0.6%,
Without the harmful substances such as Muscovitum, mud class, modulus of fineness 2.21, it is mostly circular hard particles, there is minute aperture on surface, proportion is
3112Kg/m3, doing closely knit unit weight is 1573Kg/m3, loose dry specific gravity is 1438Kg/m3, voidage 27%, modified sand robustness is used
Metabisulfite solution sense weight loss 0.3%, in sand material, sulfide and sulphates content press SO3It is calculated as 0.67%.Existed with this heap
Schreyerite slag modification sand equal-volume on wetland face substitutes the fluvial sand that modulus of fineness is 2.32 and prepares C30, C40, C50, C60 coagulation
Soil is tested, and the workability of modified sand concrete is good compared with river sand concrete, does not isolate, not bleeding, and the slump, divergence are compared with river
Sand concrete is respectively increased 21～26%, 28～34%；Cube unit weight averagely improves 2.7% compared with river sand concrete unit weight, 7d, 28d
Modified compression strength of sand concrete is respectively increased 5～12%, 10～19%, 28d compression elasticity mould compared with river sand concrete comprcssive strength
Amount raising 11～17%, axial tensile strength is suitable, the limited expansion rate of 1d, 3d, 7d, 14d, 28d, 60d age, free wxpansion
Rate is suitable, the Creep Coefficient reduction by 28～37% of corresponding age modification sand concrete, average compared with river sand concrete with reinforcing bar cohesive force
Improve 27.9%.Result of the test shows, the main physico-mechanical performance of this schreyerite slag modification sand concrete is better than fluvial sand coagulation
Soil, this schreyerite slag modification sand serviceability is better than common fluvial sand.
Modified schreyerite slag sand test is prepared mortar and is used for civil buildings, and feedback workability is good, does not ftracture, intensity is good.
Water demand ratio is 101% to the active ground-slag of gained after testing, reaches S95 grade slag powder strength criterion.
Embodiment 5
Take the water quenching schreyerite slag of the natural drying in certain enterprise stockyard, produce construction sand and active slag with following steps
Powder：
（1）The shaping of water quenching schreyerite solid impurity particle is modified：Water quenching schreyerite slag is placed in wheel rolling formula roll mixer, profit
Pulverized tender froth slag therein and ground away hard with the slightly frictional force between spreading power repeatedly and slag of rolling wheel
The part sharp corners of grain, make the mixture containing thicker hard particles material and granulated slag；
（2）Sand and the separation of granulated slag：By step（1）The mixture containing thicker hard particles material and granulated slag of gained is using shaking
Dynamic sieve is separated into the sand material of particle diameter >=0.15mm and particle diameter is less than the granulated slag of 0.15mm；
The sand material of gained particle diameter >=0.15mm is construction sand；
（3）The preparation of active ground-slag：
From belite-anhydrite matured slag and slag as adjuvant, the ZC type from commercially available Zi Chen company activates grinding aid
Agent, by step（2）It is granulated slag 70% in mass ratio that the particle diameter of gained is less than the granulated slag of 0.15mm and adjuvant, activated grinding aids:Adjuvant
（Belite-anhydrite matured slag 20%+ slag 9.9%）29.9%:The ratio dispensing of activated grinding aids 0.1%, combined grinding is to 80 μm
Tail over 6% fine powder, obtain final product active ground-slag.
The particle diameter of schreyerite slag modification sand obtained by the present embodiment is the continuous grading of 0.15～3.5mm, powder containing quantity 2.2%,
Without the harmful substances such as Muscovitum, mud class, modulus of fineness 2.0, it is mostly irregular hard particles, there is minute aperture on surface, proportion is
3016Kg/m3, doing closely knit unit weight is 1279Kg/m3, loose dry specific gravity is 1207Kg/m3, voidage 40%, modified sand robustness is used
Metabisulfite solution sense weight loss 5.0%, in sand material, sulfide and sulphates content press SO3It is calculated as 0.47%.Existed with this heap
Schreyerite slag modification sand equal-volume on wetland face substitutes the fluvial sand that modulus of fineness is 2.65 and prepares C20, C30, C40, C50 coagulation
Soil is tested, and the workability of modified sand concrete is good compared with river sand concrete, does not isolate, not bleeding, the slump, divergence and river
Sand concrete is suitable；Cube unit weight is averagely light by 4.9% compared with river sand concrete unit weight, 7d, 28d modification compression strength of sand concrete
Suitable with river sand concrete comprcssive strength, 28d pressure-proof elasticity modulus quite, axial tensile strength quite, 1d, 3d, 7d, 14d,
The limited expansion rate of 28d, 60d age, free swelling rate quite, the Creep Coefficient of corresponding age modification sand concrete reduces by 12～
21%, averagely improve 16.4% with reinforcing bar cohesive force compared with river sand concrete.Result of the test shows, schreyerite slag modification sand concrete
Main physico-mechanical performance reaches river sand concrete index, and schreyerite slag modification sand serviceability is suitable with common fluvial sand.
Built a house with this modified schreyerite slag sand engineering for civilian use, user feedback has good workability, not running pulp not bleeding, intensity
Good.
Water demand ratio is 100% to the active ground-slag of gained after testing, reaches S75 grade slag powder strength criterion.
Claims (9)
1. produce construction sand with the method for active ground-slag it is characterised in that comprising the following steps with water quenching schreyerite slag：
（1）The shaping of water quenching schreyerite solid impurity particle is modified：Pulverized in water quenching schreyerite slag with grinding or shock or spreading mode
Tender froth slag simultaneously eliminates the part sharp corners of hard particles, water quenching schreyerite slag is made and contains thicker hard particles material
Mixture with granulated slag；
（2）Sand and the separation of granulated slag：By step（1）The mixture containing thicker hard particles material and granulated slag of gained is separated into particle diameter
The sand material of >=the 0.15mm and particle diameter granulated slag less than 0.15mm；
The sand material of gained particle diameter >=0.15mm is construction sand；
（3）The preparation of active ground-slag：By step（2）The granulated slag that the particle diameter of gained is less than 0.15mm is pressed with adjuvant, activated grinding aids
Mass ratio is granulated slag 50～90%:Adjuvant 10～50%:The ratio dispensing of activated grinding aids 0.05～3%, three's quality proportioning sum
For 100%, combined grinding tails over to 80 μm≤12% fine powder, obtain final product active ground-slag.
2. the method that water quenching schreyerite slag according to claim 1 produces construction sand and active ground-slag, its feature exists
In step（1）In, described lapping mode refers to water quenching schreyerite slag is continuously introduced in the ball mill of draw ratio ＜ 2.5 with little
Slightly the grinding tender froth slag therein and grind away the part sharp corners of hard particles of ball or forging.
3. the method that water quenching schreyerite slag according to claim 1 produces construction sand and active ground-slag, its feature exists
In step（1）In, described shock mode refers to spurt in volute by water quenching schreyerite slag or is placed in star blender or puts
In the conical agitator or be placed in belt grinding body agitator in, using water quenching schreyerite slag and antifriction metal (AFM) inwall shock with
Mutual shock between friction and water quenching schreyerite solid impurity particle and frictional force are pulverized tender froth slag therein and are eliminated part
The sharp corners of hard particles.
4. the method that water quenching schreyerite slag according to claim 1 produces construction sand and active ground-slag, its feature exists
In step（1）In, described spreading mode refers to roll over mixing apparatus spreading water quenching schreyerite slag using little pressure wheel, with rolling wheel
Slight frictional force between spreading and water quenching schreyerite solid impurity particle is pulverized tender froth slag therein and is eliminated partly hard
The sharp corners of grain.
5. produce construction sand and active ground-slag with water quenching schreyerite slag according to any claim in claim 1-4
Method it is characterised in that step（2）In, described separation finger with Powder selecting mechanism sorting or adopts vibrosieve or rotary screen
Screening.
6. produce construction sand and active ground-slag with water quenching schreyerite slag according to any claim in claim 1-4
Method it is characterised in that step（3）In, described adjuvant refer to slag, silicon ash, kieselguhr, belite-anhydrite matured slag and
Containing at least one in the material based on calcium aluminate or calcium sulfoaluminate minerals.
7. produce construction sand and active ground-slag with water quenching schreyerite slag according to any claim in claim 1-4
Method it is characterised in that step（3）In, described activated grinding aids are the commercially available activated grinding aids containing hydramine.
8. produce construction sand and active ground-slag with water quenching schreyerite slag according to any claim in claim 1-4
Method it is characterised in that step（1）In, add account for water quenching schreyerite slag mass ratio 0.03～3% granule modified dose.
9. ask the described method producing construction sand and active ground-slag with water quenching schreyerite slag, its feature according to Claim 8
It is, described granule modified dose is one or more of hydramine, silane, waterglass, sodium aluminate solution.
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| CN109776023A (en) * | 2019-03-07 | 2019-05-21 | 上海宝田新型建材有限公司 | A kind of modified steel slag superfine powder with high oil absorption value and preparation method thereof |
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