CN106587840B - The preparation method of converter slag baking-free ceramicite - Google Patents
The preparation method of converter slag baking-free ceramicite Download PDFInfo
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- CN106587840B CN106587840B CN201611160333.6A CN201611160333A CN106587840B CN 106587840 B CN106587840 B CN 106587840B CN 201611160333 A CN201611160333 A CN 201611160333A CN 106587840 B CN106587840 B CN 106587840B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a kind of preparation methods of converter slag baking-free ceramicite, include the following steps：1) raw material is weighed by mass, including：15~45 parts of converter slag washing ball milling mud, 5~15 parts of blast furnace dust, 25~45 parts of flyash, 9~25 parts of clay, 1~5 part of cement, 1~5 part of aluminium powder；2) by raw material mixed grinding into 100~250 mesh powder-mixed materials；3) mixed material is put into balling head, adds 8~10 mass parts of water, starting balling head makes material become spherical shape, obtains the pellet of a diameter of 5~12mm；4) gained pellet feeding drying system is dried, promotes pellet temperature to 60~70 DEG C；It is re-fed into drying oven to be dried, dries 125~250 DEG C, 90~110min of drying time of furnace temperature, after cooling up to slag baking-free ceramicite.The haydite of this method production is functional, solves the problems, such as the accumulation of the metallurgical wastes such as current slag and pollutes environment, improves the added value of steel slag utilization.
Description
Technical field
The present invention relates to a kind of slag recovery and utilization technologies, particularly relate to a kind of preparation side of converter slag baking-free ceramicite
Method.
Background technology
In general, slag contains 7~10% or so irony resource.In order to preferably extract the money of the iron content in slag
Source, while the grade of iron-containing resource is improved, many enterprises of China take the process iron-containing resource of wet method washing ball milling opposite
Higher slag.Slag washing ball milling mud is exactly to take wet method washing ball-milling technology extraction metallic iron, using recrement after magnetic separation
Sediment.Slag washing ball milling mud fineness is small, easy infiltration, and saturated aqueous rate is about 30%.Since slag has certain glue
Solidifying property, therefore slag washing ball milling mud is difficult to be dehydrated, it is again easily hardened after dry, so as to cause being difficult to transport and stack, seriously
It polluted production scene.How to solve the stockpiling of washing ball milling mud, become an important and urgent job using problem.
Slag washes ball milling mud compared with not washing steel slag tailings, P2O5It decreases with iron content, but CaO,
SiO2、Al2O3、SO3It increased with basicity, bulk chemical ingredient is very nearly the same.Therefore, slag washing ball milling mud is to compare slag
Tailings is more suitable for doing the raw material of haydite.Slag washing ball milling mud is converter slag through wet ball grinding, magnetic separation treated byproduct,
Its hydraulic gelation activity is relatively low, and early strength is preferable, and later strength is relatively low, if without rationally utilizing, a large amount of sludge will
It pollutes the environment, while occupies a large amount of soil, the clean manufacturing and environmental protection to iron and steel enterprise will be very unfavorable.
Blast furnace dust is the stove dirt carried out in ironmaking processes by blast furnace gas, it is by blast furnace burden powder and in high temperature
Area's intense reaction and generate particle composition, be one of iron and steel enterprise's primary solids emission.The chemical composition of gas ash compares
Complexity, there are many more unburned complete charcoal, Yi Jiqian, zinc, bismuth, copper, indium, cadmium, arsenic and the oxidations of lightweight alkali metal in addition to iron
Object.Gas ash grain size is small, and density is small, is easily drifted in air after dry, is easily formed complicated component, human body danger in air
The larger floating dust of evil property, do harm to huamn body.Containing iron, charcoal and a small amount of non-ferrous metal in gas ash, belong to valuable secondary money
The waste of resource if effectively cannot administer and utilize, is not only caused in source, and environment is caused greatly to pollute.To gas ash into
Row comprehensive utilization, it is not only with good economic efficiency, while there is very high environmental benefit and social benefit.
At present the waste and old refractory material in China reprocessing application or by the way of more extensive, such as rubbish into
Row is buried, degrading utilizes.On the one hand rudimentary processing mode can occupy the significant wastage of a large amount of soil reclamation resources, the opposing party
Face also results in serious environmental pollution.
Baking-free ceramicite is fabricated to if can converter slag be washed ball milling mud and be used, you can is solved its stockpiling, is utilized
Problem, and can realize the two-win of economic benefit and environmental benefit.
Invention content
The purpose of the present invention is to provide a kind of preparation methods of converter slag baking-free ceramicite, and ball milling is washed with converter slag
Mud prepares baking-free ceramicite as raw material, solves the stockpiling of converter current slag washing ball milling mud, using problem, improves converter slag
The added value utilized.
To achieve the above object, the preparation method of converter slag baking-free ceramicite provided by the present invention, includes the following steps：
1) raw material is weighed by mass, including：15~45 parts of converter slag washing ball milling mud, 5~15 parts of blast furnace dust,
25~45 parts of flyash, 9~25 parts of clay, 1~5 part of cement, 1~5 part of aluminium powder；
2) by raw material mixed grinding into 100~250 mesh powder-mixed materials；
3) mixed material is put into balling head, adds 8~10 mass parts of water, starting balling head makes material become spherical shape,
Obtain the pellet of a diameter of 5~12mm；
4) gained pellet feeding drying system is dried, promotes pellet temperature to 60~70 DEG C；It is re-fed into drying oven
It is dried, dries 125~250 DEG C, 90~110min of drying time of furnace temperature, after cooling up to slag baking-free ceramicite.
Preferably, the blast furnace dust is raw material dust and high-temperature region intense reaction that blast furnace gas carries out and generates
Particle through product obtained from wet type or dry dust removal, main chemical compositions are TFe (total iron) by mass：28.2~
32.3%, C：18.5~24.4%, Zn：6.2~10.1%, CaO：4.0~5.5%, SiO2：3.5~5.4%, Al2O3：3.7
~5.5%.
Preferably, the clay for waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material,
Its plasticity index is less than 10.Clay of this kind of powder body material as haydite, the waste and old fireclay refractory of recoverable, favorably
In the recycling of waste and old refractory material, environmental pollution caused by burial processing is avoided.
Preferably, the flyash is the fine ash that catching is got off in the flue gas after coal combustion, main component Al2O3：
23~38%, SiO2：38~54%, Fe2O3：4~16%, CaO：3~10%.
Preferably, in step 2), the sequence of mixed grinding is：First each raw material components are all added in blender, stirring
15~18min is to be uniformly mixed so as to obtain mixed material；Mixed material is ground using grinder again, obtains powder mixture
Material.Further, the rotating speed when blender is stirred is 200~250r/min.
Preferably, the bulk density for reduction ceramic product, the converter slag wash the metal weight of iron of ball milling mud
Content≤1%.
Preferably, the cement is the Portland cement that strength grade is 42.5, is conducive to save using ordinary cement
Save production cost.
Preferably, the aluminium powder is made by aluminium foil through grinding, and granularity is 300~400 mesh.
Preferably, in step 1), the raw material further includes the ultra-fine ground granulated blast furnace slag as reinforcing agent, by granulated blast-furnace ore deposit
Ground-slag is ground.
The beneficial effects of the invention are as follows：
1) using converter slag washing ball milling mud, blast furnace dust, flyash, clay etc. as the original of synthesis baking-free ceramicite
Material so that the industrial wastes such as converter slag washing ball milling mud are recycled, and effectively reduce heat preservation baking-free ceramicite
Production cost, while the industrial wastes such as converter slag washing ball milling mud is made to get utilization；
2) haydite is prepared using unburned technique, mass energy can be saved；
3) effectively prevent converter slag washing ball milling mud unordered outer row and caused by environmental pollution and ecological disruption, have
Conducive to Ecological Civilization Construction；
4) production method is simple for process, and energy conservation and environmental protection is of low cost, and haydite is functional, improves steel slag utilization
Added value.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail.
Embodiment 1
The preparation method of converter slag baking-free ceramicite that the present embodiment is provided, includes the following steps：
1) raw material is weighed by mass：35 parts of converter slag washing ball milling mud, 30 parts of flyash, glues 5 parts of blast furnace dust
20 parts of soil, 5 parts of cement, 5 parts of aluminium powder；Wherein, converter slag washing ball milling golden paint category iron content≤1%；Blast furnace dust is high
Raw material dust and high-temperature region intense reaction that producer gas carries out and the particle that generates are through production obtained from wet type or dry dust removal
Object, main chemical compositions TFe：28.2%th, C：24.4%th, Zn：6.2%th, CaO：4.0%th, SiO2：3.5%th, Al2O3：
3.7%；Clay for waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material, plasticity index is 9；
Flyash is the fine ash that catching is got off from the flue gas after coal combustion, main component Al2O3：23%th, SiO2：54%th,
Fe2O3：13%th, CaO：10%；Aluminium powder is made by aluminium foil through grinding, and granularity is 300 mesh.
2) by raw material, mix grinding into 150 mesh powder, then stirs 15min, mixing speed is in blender in grinder
200r/min, mixing obtain mixed material；
3) mixed material is put into pan-pelletizer, rotates pan-pelletizer, spraying plus water, it is 10 parts to add water quality, makes material balling-up
Shape, a diameter of 5mm of balling-up pellet；
4) gained spherical shape raw material are entered into drying system, promotes raw material ball temperature to after 65 DEG C, then dried, drying oven
200 DEG C, drying time 100min of temperature, after cooling up to slag baking-free ceramicite.
After the converter slag washing clay standby heat preservation baking-free ceramicite of ball milling is obtained, to keeping the temperature the heap of baking-free ceramicite
The performance indicators such as product density, compression strength and 1h water absorption rates measure, bulk density 422kg/m3, cylindrical compress strength is
3.7MPa, 1h water absorption rate are 3.25%, and property indices are excellent.Simultaneously as the present embodiment has used 35 parts of converter steel
Pulp water washes ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved, so as to effectively reduce baking-free ceramicite
Production cost, and the baking-free ceramicite function admirable produced, good heat insulating.
Embodiment 2
The preparation method of converter slag baking-free ceramicite that the present embodiment is provided, includes the following steps：
1) raw material is weighed by mass：30 parts of converter slag washing ball milling mud, 34 parts of flyash, glues 5 parts of blast furnace dust
21 parts of soil, 5 parts of cement, 4 parts of aluminium powder；Wherein, converter slag washing ball milling golden paint category iron content≤1%；Blast furnace dust is high
Raw material dust and high-temperature region intense reaction that producer gas carries out and the particle that generates are through production obtained from wet type or dry dust removal
Object, main chemical compositions TFe：32.1%th, C：18.5%th, Zn：6.5%th, CaO：4.5%th, SiO2：4.0%th, Al2O3：
3.8%；Clay for waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material, plasticity index is 8；
Flyash is the fine ash that catching is got off from the flue gas after coal combustion, main component Al2O3：24%th, SiO2：52%th,
Fe2O3：16%th, CaO：8%；Aluminium powder is made by aluminium foil through grinding, and granularity is 400 mesh.
2) by raw material, mix grinding into 200 mesh powder, then stirs 15min, mixing speed is in blender in grinder
200r/min, mixing obtain mixed material；
3) mixed material is put into pan-pelletizer, rotates pan-pelletizer, spraying plus water, it is 10 parts to add water quality, makes material balling-up
Shape, a diameter of 8mm of balling-up pellet；
4) gained spherical shape raw material are entered into drying system, promote pelletizing (i.e. pellet) temperature to after 60 DEG C, then dried,
200 DEG C, drying time 90min of furnace temperature is dried, after cooling up to slag baking-free ceramicite.
It is close to the accumulation for keeping the temperature baking-free ceramicite after the converter slag washing clay standby heat preservation baking-free ceramicite of ball milling is obtained
The performance indicators such as degree, compression strength and 1h water absorption rates measure, bulk density 463kg/m3, cylindrical compress strength is
4.4MPa, 1h water absorption rate are 1.57%, and property indices are excellent.Simultaneously as the present embodiment has used 30 parts of converter steel
Pulp water washes ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved, so as to effectively reduce baking-free ceramicite
Production cost, and the baking-free ceramicite function admirable produced, good heat insulating.
Embodiment 3
The preparation method of converter slag baking-free ceramicite that the present embodiment is provided, includes the following steps：
1) raw material is weighed by mass：25 parts of converter slag washing ball milling mud, 15 parts of blast furnace dust, 34 parts of flyash,
21 parts of clay, 5 parts of cement, 3 parts of aluminium powder；Wherein, converter slag tailings metal Ferrum content≤1%；Blast furnace dust is blast furnace coal
Raw material dust and high-temperature region intense reaction that gas carries out and the particle that generates through product obtained from wet type or dry dust removal,
Main chemical compositions are TFe：30.1%th, C：23.5%th, Zn：7.1%th, CaO：5.0%th, SiO2：4.1%th, Al2O3：4.8%；It is viscous
Soil for waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material, plasticity index is 9；Flyash is
The fine ash that catching is got off from the flue gas after coal combustion, main component Al2O3：37%th, SiO2：51%th, Fe2O3：9.0%th,
CaO：8.0%；Aluminium powder is made by aluminium foil through grinding, and granularity is 350 mesh.
2) by raw material, mix grinding into 100 mesh powder, then stirs 16min, mixing speed is in blender in grinder
250r/min, mixing obtain mixed material；
3) mixed material is put into pan-pelletizer, rotates pan-pelletizer, spraying plus water, it is 10 parts to add water quality, makes material balling-up
Shape, a diameter of 5mm of balling-up pellet；
4) gained spherical shape raw material are entered into drying system, promotes pelletizing temperature to after 65 DEG C, then dried, dry furnace temperature
200 DEG C, drying time 100min of degree, after cooling up to slag baking-free ceramicite.
After the converter slag washing clay standby heat preservation baking-free ceramicite of ball milling is obtained, to keeping the temperature the heap of baking-free ceramicite
The performance indicators such as product density, compression strength and 1h water absorption rates measure, and measure its bulk density as 437kg/m3, cylindrical compress strength
For 3.7MPa, 1h water absorption rates are 1.51%, and property indices are excellent.Simultaneously as the present embodiment has used 25 parts of converter
Slag washes ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved, so as to effectively reduce unburned pottery
Grain production cost, and the baking-free ceramicite function admirable produced, good heat insulating.
Embodiment 4
The preparation method of converter slag baking-free ceramicite that the present embodiment is provided, includes the following steps：
1) raw material is weighed by mass：15 parts of converter slag washing ball milling mud, 45 parts of flyash, glues 8 parts of blast furnace dust
21 parts of soil, 5 parts of cement, 1 part of aluminium powder；Wherein, converter slag tailings metal Ferrum content≤1%；Blast furnace dust is blast furnace gas
The raw material dust and high-temperature region intense reaction that carry out and the particle that generates are through product obtained from wet type or dry dust removal, master
It is TFe to want chemical composition：28.3%th, C：18.9%th, Zn：6.7%th, CaO：4.9%th, SiO2：4.0%th, Al2O3：4.1%；Clay
For waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material, plasticity index is 7；Flyash be from
The fine ash that catching is got off in flue gas after coal combustion, main component Al2O3：25%th, SiO2：39.5%th, Fe2O3：12.7%th,
CaO：9.0%；Aluminium powder is made by aluminium foil through grinding, and granularity is 300 mesh.
2) by raw material, mix grinding into 200 mesh powder, then stirs 18min, mixing speed is in blender in grinder
225r/min, mixing obtain mixed material；
3) mixed material is put into pan-pelletizer, rotates pan-pelletizer, spraying plus water, it is 10 parts to add water quality, makes material balling-up
Shape, a diameter of 8mm of balling-up pellet；
4) gained spherical shape raw material are entered into drying system, promotes raw material ball temperature to after 65 DEG C, then dried, drying oven
150 DEG C, drying time 105min of temperature, after cooling up to slag baking-free ceramicite.
After the converter slag washing clay standby heat preservation baking-free ceramicite of ball milling is obtained, to keeping the temperature the heap of baking-free ceramicite
The performance indicators such as product density, compression strength and 1h water absorption rates measure, bulk density 519kg/m3, cylindrical compress strength is
4.7MPa, 1h water absorption rate are 2.28%, and property indices are excellent.In the present embodiment, due to the use of 15 parts of converter slag
Wash ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved, and is produced into so as to effectively reduce haydite
This, and the baking-free ceramicite function admirable produced, good heat insulating.
Embodiment 5
The preparation method of converter slag baking-free ceramicite that the present embodiment is provided, includes the following steps：
1) raw material is weighed by mass：20 parts of converter slag washing ball milling mud, 15 parts of blast furnace dust, 44 parts of flyash,
15 parts of clay, 3 parts of cement, 1 part of aluminium powder；Wherein, converter slag tailings metal Ferrum content≤1%；Blast furnace dust is blast furnace coal
Raw material dust and high-temperature region intense reaction that gas carries out and the particle that generates through product obtained from wet type or dry dust removal,
Main chemical compositions are TFe：30.1%th, C：23.5%th, Zn：10.1%th, CaO：5.4%th, SiO2：4.1%th, Al2O3：4.8%；
Clay for waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material, plasticity index is 9；Flyash
It is the fine ash that catching is got off from the flue gas after coal combustion, main component Al2O3：37%th, SiO2：51%th, Fe2O3：
4.0%th, CaO：3.0%；Aluminium powder is made by aluminium foil through grinding, and granularity is 400 mesh.
2) by raw material, mix grinding into 250 mesh powder, then stirs 15min, mixing speed is in blender in grinder
200r/min, mixing obtain mixed material；
3) mixed material is put into pan-pelletizer, rotates pan-pelletizer, spraying plus water, it is 9 parts to add water quality, makes material balling-up
Shape, a diameter of 10mm of balling-up pellet；
4) gained spherical shape raw material are entered into drying system, promotes pelletizing temperature to after 70 DEG C, then dried, dry furnace temperature
125 DEG C, drying time 100min of degree, after cooling up to slag baking-free ceramicite.
After the converter slag washing clay standby heat preservation baking-free ceramicite of ball milling is obtained, to keeping the temperature the heap of baking-free ceramicite
The performance indicators such as product density, compression strength and 1h water absorption rates measure, bulk density 594kg/m3, cylindrical compress strength is
6.7MPa, 1h water absorption rate are 3.01%, and property indices are excellent.Meanwhile the present embodiment is due to the use of 20 parts of converter steel
Pulp water washes ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved, so as to effectively reduce haydite production
Cost, and the baking-free ceramicite function admirable produced, good heat insulating.
Embodiment 6
The preparation method of converter slag baking-free ceramicite that the present embodiment is provided, includes the following steps：
1) raw material is weighed by mass：45 parts of converter slag washing ball milling mud, 25 parts of flyash, glues 5 parts of blast furnace dust
9 parts of soil, 1 part of cement, 5 parts of aluminium powder；Wherein, converter slag tailings metal Ferrum content≤1%；Blast furnace dust is that blast furnace gas is taken
The raw material dust and high-temperature region intense reaction taken out of and the particle that generates are main through product obtained from wet type or dry dust removal
Chemical composition is TFe：30.1%th, C：23.5%th, Zn：7.1%th, CaO：5.0%th, SiO2：4.1%th, Al2O3：5.5%；Clay is
Waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material, plasticity index is 9；Flyash is from coal
The fine ash that catching is got off in flue gas after burning, main component Al2O3：37%th, SiO2：51%th, Fe2O3：9.0%th, CaO：
8.0%；Aluminium powder is made by aluminium foil through grinding, and granularity is 300 mesh.
2) by raw material, mix grinding into 200 mesh powder, then stirs 15min, mixing speed is in blender in grinder
200r/min, mixing obtain mixed material；
3) mixed material is put into pan-pelletizer, rotates pan-pelletizer, spraying plus water, it is 8 parts to add water quality, makes material balling-up
Shape, a diameter of 12mm of balling-up pellet；
4) gained spherical shape raw material are entered into drying system, promotes pelletizing temperature to after 65 DEG C, then dried, dry furnace temperature
250 DEG C, drying time 110min of degree, after cooling up to slag baking-free ceramicite.
After the converter slag washing clay standby heat preservation baking-free ceramicite of ball milling is obtained, to keeping the temperature the heap of baking-free ceramicite
The performance indicators such as product density, compression strength and 1h water absorption rates measure, bulk density 652kg/m3, cylindrical compress strength is
7.2MPa, 1h water absorption rate are 3.25%, and property indices are excellent.Meanwhile the present embodiment is due to the use of 45 parts of converter steel
Pulp water washes ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved, so as to effectively reduce haydite production
Cost, and the baking-free ceramicite function admirable produced, good heat insulating.
Embodiment 7
To improve the intensity of baking-free ceramicite, the present embodiment adds the ultra-fine blast-furnace cinder of reinforcing agent on the basis of embodiment 6
Powder, the preparation method of converter slag baking-free ceramicite provided, includes the following steps：
1) raw material is weighed by mass：45 parts of converter slag washing ball milling mud, 25 parts of flyash, glues 5 parts of blast furnace dust
9 parts of soil, 1 part of cement, 5 parts of aluminium powder, 5 parts of reinforcing agent；Wherein, converter slag tailings metal Ferrum content≤1%；Blast furnace dust is
Raw material dust and high-temperature region intense reaction that blast furnace gas carries out and the particle that generates are through obtained from wet type or dry dust removal
Product, main chemical compositions TFe：30.1%th, C：23.5%th, Zn：7.1%th, CaO：5.0%th, SiO2：4.1%th, Al2O3：
5.5%；Clay for waste and old fireclay refractory by sorting, it is broken after gained a kind of powder body material, plasticity index is 9；
Flyash is the fine ash that catching is got off from the flue gas after coal combustion, main component Al2O3：37%th, SiO2：51%th,
Fe2O3：9.0%th, CaO：8.0%；Aluminium powder is made by aluminium foil through grinding, and granularity is 300 mesh；Reinforcing agent is ultra-fine blast-furnace cinder
Powder is ground by ground granulated blast furnace slag, specific surface area 1000kg/m2。
2) by raw material, mix grinding into 200 mesh powder, then stirs 15min, mixing speed is in blender in grinder
200r/min, mixing obtain mixed material；
3) mixed material is put into pan-pelletizer, rotates pan-pelletizer, spraying plus water, it is 8 parts to add water quality, makes material balling-up
Shape, a diameter of 5mm of balling-up pellet；
4) gained spherical shape raw material are entered into drying system, promotes pelletizing temperature to after 65 DEG C, then dried, dry furnace temperature
250 DEG C, drying time 110min of degree, after cooling up to slag baking-free ceramicite.
After the converter slag washing clay standby heat preservation baking-free ceramicite of ball milling is obtained, to keeping the temperature the heap of baking-free ceramicite
The performance indicators such as product density, compression strength and 1h water absorption rates measure, bulk density 552kg/m3, cylindrical compress strength is
12.7MPa, 1h water absorption rate are 2.36%, and property indices are excellent.Meanwhile the present embodiment is due to the use of 45 parts of converter steel
Pulp water washes ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved, so as to effectively reduce haydite production
Cost, and the baking-free ceramicite function admirable produced, good heat insulating.
Claims (10)
1. a kind of preparation method of converter slag baking-free ceramicite, it is characterised in that：Include the following steps：
1) raw material is weighed by mass, including：
2) by raw material mixed grinding into 100~250 mesh powder-mixed materials；
3) mixed material is put into balling head, adds 8~10 mass parts of water, starting balling head makes material become spherical shape, obtains
The pellet of a diameter of 5~12mm；
4) gained pellet feeding drying system is dried, promotes pellet temperature to 60~70 DEG C；It is re-fed into drying oven progress
125~250 DEG C, 90~110min of drying time of furnace temperature is dried in drying, after cooling up to slag baking-free ceramicite.
2. the preparation method of converter slag baking-free ceramicite according to claim 1, it is characterised in that：The blast furnace dust
It is the raw material dust and high-temperature region intense reaction that blast furnace gas carries out and the particle that generates is obtained through wet type or dry dust removal
Product, main chemical compositions are by mass：
3. the preparation method of converter slag baking-free ceramicite according to claim 1, it is characterised in that：The clay is waste and old
Fireclay refractory by sorting, it is broken after gained powder body material, plasticity index is less than 10.
4. the preparation method of converter slag baking-free ceramicite according to claim 1, it is characterised in that：The flyash is
The fine ash that catching is got off in flue gas after coal combustion, main component Al2O3：23~38%, SiO2：38~54%, Fe2O3：4
~16%, CaO：3~10%.
5. the preparation method of converter slag baking-free ceramicite according to any one of claims 1 to 4, it is characterised in that：Step
It is rapid 2) in, the sequence of mixed grinding is：First each raw material components are all added in blender, 15~18min of stirring is mixed
Material；Mixed material is ground using grinder again, obtains powder-mixed material.
6. the preparation method of converter slag baking-free ceramicite according to claim 5, it is characterised in that：The blender carries out
Rotating speed during stirring is 200~250r/min.
7. the preparation method of converter slag baking-free ceramicite according to any one of claims 1 to 4, it is characterised in that：Institute
State metallic iron mass content≤1% of converter slag washing ball milling mud.
8. the preparation method of converter slag baking-free ceramicite according to any one of claims 1 to 4, it is characterised in that：Institute
It is the portland cement that strength grade is 42.5 to state cement.
9. the preparation method of converter slag baking-free ceramicite according to any one of claims 1 to 4, it is characterised in that：Institute
It states aluminium powder to be made through grinding by aluminium foil, granularity is 300~400 mesh.
10. the preparation method of converter slag baking-free ceramicite according to any one of claims 1 to 4, it is characterised in that：Step
It is rapid 1) in, the raw material further includes the ultra-fine ground granulated blast furnace slag as reinforcing agent, is ground by ground granulated blast furnace slag, add in
It measures as 5 mass parts.
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| CN109761633B (en) * | 2019-03-09 | 2021-07-20 | 大连地拓环境科技有限公司 | Baking-free boron mud PVC ceramsite and preparation method thereof |
| CN110950607B (en) * | 2019-12-18 | 2021-11-02 | 张家口盛博建筑科技有限公司 | High-strength baking-free ceramsite and preparation method and application thereof |
| CN114804685B (en) * | 2022-03-17 | 2023-12-22 | 广东省建筑材料研究院有限公司 | Double-layer baking-free ceramsite and preparation method thereof |
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