CN110282933A - A kind of microlight-type heat insulation inner core and preparation method thereof prepared using iron tailings powder as raw material - Google Patents
A kind of microlight-type heat insulation inner core and preparation method thereof prepared using iron tailings powder as raw material Download PDFInfo
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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
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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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 microlight-type heat insulation inner cores and preparation method thereof prepared using iron tailings powder as raw material, according to parts by weight, the microlight-type heat insulation inner core includes following components: 10 ~ 80 parts of iron tailings powder, 20 ~ 150 parts of cement, 5 ~ 60 parts of expanded perlite, 0.1 ~ 10 part of additive, 0.1 ~ 5 part of foaming agent, 0.05 ~ 1 part of foam stabilizer；The additive is made of melamine water reducing agent, rubber powder and carboxymethyl cellulose, and the weight ratio of the melamine water reducing agent, rubber powder and carboxymethyl cellulose is 1:0.5 ~ 1.5:1 ~ 10.The present invention uses the solid waste such as iron tailings for raw material, reasonable utilization has been carried out to the lesser iron tailings of wherein partial size, by being the raw material for preparing heat insulation inner core using cement, expanded perlite, the method for preparing microlight-type heat insulation inner core, to realize the purpose of a large amount of processing fine grain iron tailings, environmental pressure is alleviated；The present invention is while maintaining heat insulation inner core high heat insulating effect, the characteristics of overcoming its easy fragmentation, its mechanical strength is substantially improved.
Description
Technical field
The present invention relates to a kind of microlight-type heat insulation inner cores and preparation method thereof prepared using iron tailings powder as raw material.
Background technique
Mineral Resources in China exploitation total scale occupy world forefront, and the outstanding feature of China's iron ore deposit is that grade is low, total
Raw associated minerals are more, lead to that a large amount of iron tailings can be generated in ore dressing process, 2.5-3.0t tail will be discharged in every production 1t iron ore concentrate
Mine.Stockpiling iron tailings not only occupies a large amount of soils, also pollutes to soil, water body, air etc., destroys ecological environment, shadow
Sound is very big.
The stockpiling of tailing has very big negative effect to environment, also needs to build Tailings Dam, not only occupies a large amount of soil,
And to be safeguarded using a large amount of human resources and huge financial resource, considerably increase the money for tailing waste thing
Gold investment.And Tailings utilization is bulky grain part, for building filler.The aspect of thinner Tailings utilization is more after screening
It is few.
Summary of the invention
For above-mentioned technical problem of the existing technology, it is original that the purpose of the present invention is to provide one kind with tailing waste residue
Expect the microlight-type heat insulation inner core and preparation method thereof of preparation.This solid of iron tailings can be largely handled by means of the present invention
Waste, and preparation condition is simple, raw material is easy to get, and is easy to industrialize, and heat insulation inner core obtained has a wide range of applications again.
A kind of heat insulation inner core prepared using iron tailings powder as raw material, it is characterised in that according to parts by weight, packet
Include following components: 10 ~ 80 parts of iron tailings powder, 20 ~ 150 parts of cement, 5 ~ 60 parts of expanded perlite, 0.1 ~ 10 part of additive,
0.1 ~ 5 part of foaming agent, 0.05 ~ 1 part of foam stabilizer；The additive is by melamine water reducing agent, rubber powder and carboxymethyl cellulose group
At the weight ratio of the melamine water reducing agent, rubber powder and carboxymethyl cellulose is 1: 0.5 ~ 1.5: 1 ~ 10.
A kind of heat insulation inner core prepared using iron tailings powder as raw material, it is characterised in that according to parts by weight, packet
Include following components: 15 ~ 60 parts of iron tailings powder, 50 ~ 120 parts of cement, 10 ~ 45 parts of expanded perlite, 1 ~ 5 part of additive, foaming
0.5 ~ 3 part of agent, 0.08 ~ 0.5 part of foam stabilizer；The weight ratio of the melamine water reducing agent, rubber powder and carboxymethyl cellulose is 1:
0.8~1.2 : 1~3。
A kind of heat insulation inner core prepared using iron tailings powder as raw material, it is characterised in that according to parts by weight, packet
Include following components: 30 parts of iron tailings powder, 60 parts of cement, 30 parts of expanded perlite, 4 parts of additive, 1 part of foaming agent, foam stabilizer
0.1 part；The weight ratio of the melamine water reducing agent, rubber powder and carboxymethyl cellulose is 1: 1: 2.
A kind of method that heat insulation inner core is prepared as raw material using silica hydrogel, it is characterised in that by weight
Meter, comprising the following steps:
S1: grinding iron tailings and be sieved, obtains iron tailings powder；
S2: take 10 ~ 80 parts of iron tailings powder, 20 ~ 150 parts of cement, 5 ~ 60 parts of expanded perlite, additive 0.1 obtained by step S1 ~
10 parts of mixing, add 20 ~ 200 parts of water and stir evenly, obtain concrete slurry；
S3: 0.1 ~ 5 part of foaming agent, 0.05 ~ 1 part of foam stabilizer are taken, and is diluted with 10 ~ 200 parts of water, the solution for diluting formation is foaming
It is foamed after obtaining tiny and stable foam, be added into the concrete slurry of S2 and stirred evenly in device, foamed
Slurry；
S4: foamed slurry obtained by step S3 is poured into mold, and 6 ~ 15min is kept under 4 ~ 6 MPa pressurized conditions, starches foaming
Material forms height tight in a mold, then 10 ~ 35h of constant pressure and dry at a temperature of 20 ~ 35 DEG C, the foam in foamed slurry
Rupture and moist part evaporation, and inner core solid is formed in a mold；
S5: the inner core solid in step S4 mold is demoulded, and is put into the chest that humidity is 75 ~ 95% and is supported at 20 ~ 45 DEG C
Shield 7 ~ 21 days, it is primary every 12h watering during maintenance, it keeps inner core solid wet, later takes out inner core solid from chest,
In dry hardening 25 ~ 30 days under room temperature, so that the moisture in inner core solid is volatilized completely, the heat insulation inner core is made.
A kind of method that heat insulation inner core is prepared as raw material using silica hydrogel, it is characterised in that step S1
In, the mesh number of obtained iron tailings powder is more than 120 mesh.
A kind of method that heat insulation inner core is prepared as raw material using silica hydrogel, it is characterised in that step S4
In, before foamed slurry pours into mold, mould inner surface carries out processing of putting the oil, in order to later period demoulding.
By using above-mentioned technology, compared with prior art, the invention has the following beneficial effects:
1) foaming agent is a kind of substance for generating gas by chemical change to foam, and needs to add in foaming process a small amount of
Water, being added in cement etc. can play the role of diluted, and rupture after foam-drying, form gap in cement skeleton, therefore
It can reduce the dosage of water in concrete and reduce the thermal coefficient and its gross mass of final heat insulation inner core product.And it expands
A kind of porous thermal insulation material of perlite, anti-flammability with higher, but the higher water absorption rate of expanded perlite limit its
Application in architectural engineering.The present invention reduces the dosage of water by foaming agent to reduce the water absorption rate of expanded perlite.Pass through
Foaming and expanded perlite synergistic effect, keep final heat insulation inner core product heat insulating ability and light characteristic.Foaming agent is generally easy
Combustion, but become nonflammable under cement skeleton, expanded perlite is added in the material and more increases its flame retardant property.
2) present invention uses the solid waste such as iron tailings for raw material, has carried out reasonable benefit to the lesser tailing of wherein partial size
With, by being the raw material for preparing heat insulation inner core using cement, expanded perlite, the method for preparing microlight-type heat insulation inner core, from
And realize the purpose of a large amount of processing fine grain iron tailings, environmental pressure is on the one hand alleviated, environmental pollution is reduced, is improved simultaneously
Recovery utilization rate, meets environment protection requirement；The present invention while maintaining heat insulation inner core high heat insulating effect, gram
Its mechanical strength is substantially improved in the characteristics of having taken its easy fragmentation；
3) preparation time of heat insulation inner core of the invention is shorter, and preparation cost is lower, compared with common organic matter heat insulation inner core at
This is more cheap and has higher fire protecting performance.
4) in the preparation process of heat insulation inner core of the present invention, melamine water reducing agent can increase the flowing of concrete slurry
Property, rubber powder, carboxymethyl cellulose and foam stabilizer resin increase the viscosity between each component, each component are made to be easy to be bonded in one
It rises.In heat insulation inner core product of the present invention, due to the architectural characteristic of expanded perlite, have between expanded perlite inside higher
Gap, cement and iron tailings powder form integral skeleton structure, be filled among expanded perlite granule between gap shape
At insulation construction.Expanded perlite has light and crisp characteristic, reduces the density of heat insulation inner core to a certain extent, but it is added
Amount is not easy excessive, to keep the temperature to prevent reduction compressive resistance.It is whole for increasing concrete to joined carboxymethyl cellulose in the present invention
The viscosity of body, the concrete after preventing addition foaming agent is excessively dilute, but its additive amount should not be excessive, to prevent excessively sticky.
Specific embodiment
The present invention is further explained in the light of specific embodiments, but the scope of protection of the present invention is not limited thereto.
In following embodiment and comparative example:
Iron tailings is from North China, the constituent mass percentage composition of iron tailings are as follows: SiO2 45.43%, CaO 13.81%,
MgO 13.10%, Al2O3 11.35%, Fe2O3 10.13%, surplus are impurity.
Cement model is P.O 42.5.
Foaming agent is foam concrete foamer, is purchased from Zhengzhou City Peng Yi chemical building material Co., Ltd.
Foam stabilizer is resin expanded cement foam stabilizer, is purchased from Jining Hua Kai resin Co., Ltd.
Melamine water reducing agent thinks shield building purchased from Nanchang rain purchased from Shanghai Chen Qi Chemical Industry Science Co., Ltd, rubber powder
Materials Co., Ltd, carboxymethyl cellulose are purchased from Dongguan City a century grand plan Chemical Industry Science Co., Ltd, expanded perlite purchased from letter
Yang Chengfei new material Science and Technology Ltd..
Embodiment 1:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
30 parts of miberal powder end, 90 parts of cement, 30 parts of expanded perlite, 1 part of melamine water reducing agent, 1 part of rubber powder, carboxymethyl cellulose
2 parts, 1 part of foaming agent, 0.1 part of foam stabilizer.
The preparation method of above-mentioned heat insulation inner core the following steps are included:
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) 30 parts of iron tailings powder, 90 parts of cement, 30 parts of expanded perlite, melamine water reducing agent 1 obtained by step 1) are taken
Part, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, add 120 parts of water and stir evenly, obtain concrete slurry；
3) 1 part of foaming agent, 0.1 part of foam stabilizer are taken, and is diluted with 20 parts of water, the solution for diluting formation foams in foam maker
After obtaining tiny and stable foam, it is added into concrete slurry 2) and stirs evenly, obtain foamed slurry；
4) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Foamed slurry obtained by step 3) is poured into again
In mold, 10min is kept under 5MPa pressurized conditions, so that foamed slurry is formed height tight, then in 25 ~ 30 DEG C of temperature
Lower constant pressure and dry for 24 hours, evaporate, and forms brick solid in a mold by lather collapse and moist part in foamed slurry；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 80 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measurement result are carried out to heat insulation inner core made from embodiment 1
It is shown in Table 1.
Embodiment 2:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
40 parts of miberal powder end, 80 parts of cement, 30 parts of expanded perlite, 1 part of melamine water reducing agent, 1 part of rubber powder, carboxymethyl cellulose
2 parts, 1 part of foaming agent, 0.1 part of foam stabilizer.
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) 40 parts of iron tailings powder, 80 parts of cement, 30 parts of expanded perlite, melamine water reducing agent 1 obtained by step 1) are taken
Part, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, add 120 parts of water and stir evenly, obtain concrete slurry；
3) 1 part of foaming agent, 0.1 part of foam stabilizer are taken, and is diluted with 20 parts of water, the solution for diluting formation foams in foam maker
After obtaining tiny and stable foam, it is added into concrete slurry 2) and stirs evenly, obtain foamed slurry；
4) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Foamed slurry obtained by step 3) is poured into again
In mold, 10min is kept under 5MPa pressurized conditions, so that foamed slurry is formed height tight, then in 25 ~ 30 DEG C of temperature
Lower constant pressure and dry for 24 hours, evaporate, and forms brick solid in a mold by lather collapse and moist part in foamed slurry；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 75 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measuring method are carried out to heat insulation inner core made from embodiment 2
With embodiment 1, measurement result is shown in Table 1.
Embodiment 3:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
40 parts of miberal powder end, 90 parts of cement, 20 parts of expanded perlite, 1 part of melamine water reducing agent, 1 part of rubber powder, carboxymethyl cellulose
2 parts, 1 part of foaming agent, 0.1 part of foam stabilizer.
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) 40 parts of iron tailings powder, 90 parts of cement, 20 parts of expanded perlite, melamine water reducing agent 1 obtained by step 1) are taken
Part, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, add 120 parts of water and stir evenly, obtain concrete slurry；
3) 1 part of foaming agent, 0.1 part of foam stabilizer are taken, and is diluted with 20 parts of water, the solution for diluting formation foams in foam maker
After obtaining tiny and stable foam, it is added into concrete slurry 2) and stirs evenly, obtain foamed slurry；
4) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Foamed slurry obtained by step 3) is poured into again
In mold, 10min is kept under 5MPa pressurized conditions, so that foamed slurry is formed height tight, then in 25 ~ 30 DEG C of temperature
Lower constant pressure and dry for 24 hours, evaporate, and forms brick solid in a mold by lather collapse and moist part in foamed slurry；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 75 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measuring method are carried out to heat insulation inner core made from embodiment 3
With embodiment 1, measurement result is shown in Table 1.
Embodiment 4:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
30 parts of miberal powder end, 100 parts of cement, 20 parts of expanded perlite, 1 part of melamine water reducing agent, 1 part of rubber powder, carboxymethyl cellulose
2 parts, 1 part of foaming agent, 0.1 part of foam stabilizer.
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) 30 parts of iron tailings powder, 100 parts of cement, 20 parts of expanded perlite, melamine water reducing agent 1 obtained by step 1) are taken
Part, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, add 120 parts of water and stir evenly, obtain concrete slurry；
3) 1 part of foaming agent, 0.1 part of foam stabilizer are taken, and is diluted with 20 parts of water, the solution for diluting formation foams in foam maker
After obtaining tiny and stable foam, it is added into concrete slurry 2) and stirs evenly, obtain foamed slurry；
4) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Foamed slurry obtained by step 3) is poured into again
In mold, 10min is kept under 5MPa pressurized conditions, so that foamed slurry is formed height tight, then in 25 ~ 30 DEG C of temperature
Lower constant pressure and dry for 24 hours, evaporate, and forms brick solid in a mold by lather collapse and moist part in foamed slurry；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 75 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measuring method are carried out to heat insulation inner core made from embodiment 4
With embodiment 1, measurement result is shown in Table 1.
Comparative example 1:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
90 parts of miberal powder end, 90 parts of cement, 30 parts of expanded perlite, 1 part of poly cyanamid water-reducing agent, 1 part of rubber powder, carboxymethyl cellulose 2
Part, 1 part of foaming agent, 0.1 part of foam stabilizer.
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) 90 parts of iron tailings powder, 90 parts of cement, 30 parts of expanded perlite, melamine water reducing agent 1 obtained by step 1) are taken
Part, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, add 180 parts of water and stir evenly, obtain concrete slurry；
3) 1 part of foaming agent, 0.1 part of foam stabilizer are taken, and is diluted with 20 parts of water, the solution for diluting formation foams in foam maker
After obtaining tiny and stable foam, it is added into concrete slurry 2) and stirs evenly, obtain foamed slurry；
4) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Foamed slurry obtained by step 3) is poured into again
In mold, 10min is kept under 5MPa pressurized conditions, so that foamed slurry is formed height tight, then in 25 ~ 30 DEG C of temperature
Lower constant pressure and dry for 24 hours, evaporate, and forms brick solid in a mold by lather collapse and moist part in foamed slurry；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 75 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measuring method are carried out to heat insulation inner core made from comparative example 1
With embodiment 1, measurement result is shown in Table 1.
Comparative example 2:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
30 parts of miberal powder end, 90 parts of cement, 90 parts of expanded perlite, 1 part of poly cyanamid water-reducing agent, 1 part of rubber powder, carboxymethyl cellulose 2
Part, 1 part of foaming agent, 0.1 part of foam stabilizer.
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) 30 parts of iron tailings powder, 90 parts of cement, 90 parts of expanded perlite, melamine water reducing agent 1 obtained by step 1) are taken
Part, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, add 180 parts of water and stir evenly, obtain concrete slurry；
3) 1 part of foaming agent, 0.1 part of foam stabilizer are taken, and is diluted with 20 parts of water, the solution for diluting formation foams in foam maker
After obtaining tiny and stable foam, it is added into concrete slurry 2) and stirs evenly, obtain foamed slurry；
4) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Foamed slurry obtained by step 3) is poured into again
In mold, 10min is kept under 5MPa pressurized conditions, so that foamed slurry is formed height tight, then in 25 ~ 30 DEG C of temperature
Lower constant pressure and dry for 24 hours, evaporate, and forms brick solid in a mold by lather collapse and moist part in foamed slurry；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 75 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measuring method are carried out to heat insulation inner core made from comparative example 2
With embodiment 1, measurement result is shown in Table 1.
Comparative example 3:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
30 parts of miberal powder end, 180 parts of cement, 30 parts of expanded perlite, 1 part of poly cyanamid water-reducing agent, 1 part of rubber powder, carboxymethyl cellulose 2
Part, 1 part of foaming agent, 0.1 part of foam stabilizer.
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) take 30 parts of iron tailings powder, 180 parts of cement obtained by step 1), 30 parts of expanded perlite, 1 part of melamine water reducing agent,
1 part of rubber powder, 2 parts of carboxymethyl cellulose add 180 parts of water and stir evenly, obtain concrete slurry；
3) 1 part of foaming agent, 0.1 part of foam stabilizer are taken, and is diluted with 20 parts of water, the solution for diluting formation foams in foam maker
After obtaining tiny and stable foam, it is added into concrete slurry 2) and stirs evenly, obtain foamed slurry；
4) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Foamed slurry obtained by step 3) is poured into again
In mold, 10min is kept under 5MPa pressurized conditions, so that foamed slurry is formed height tight, then in 25 ~ 30 DEG C of temperature
Lower constant pressure and dry for 24 hours, evaporate, and forms brick solid in a mold by lather collapse and moist part in foamed slurry；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 75 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measuring method are carried out to heat insulation inner core made from comparative example 3
With embodiment 1, measurement result is shown in Table 1.
Comparative example 4:
A kind of microlight-type heat insulation inner core prepared using tailing waste residue as raw material, score meter, including following components by weight: iron tail
30 parts of miberal powder end, 90 parts of cement, 30 parts of expanded perlite, 1 part of poly cyanamid water-reducing agent, 1 part of rubber powder, carboxymethyl cellulose 2
Part, 0 part of foaming agent, 0 part of foam stabilizer.
1) iron tailings is ground to and crossed 120 meshes, obtains the iron tailings powder that mesh number is greater than 120 mesh；
2) 30 parts of iron tailings powder, 90 parts of cement, 30 parts of expanded perlite, melamine water reducing agent 1 obtained by step 1) are taken
Part, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, add 180 parts of water and stir evenly, obtain concrete slurry；
3) mould inner surface is subjected to processing of putting the oil in advance, in order to later period demoulding.Unexpanded slurry obtained by step 3) is fallen again
Enter in mold, keep 10min under 5MPa pressurized conditions, so that slurry is formed height tight, then at a temperature of 25 ~ 30 DEG C
Constant pressure and dry for 24 hours, evaporates moist part, and forms brick solid in a mold；
5) the brick solid in step 4) mold is demoulded, is put into the chest that humidity is 75 ~ 85% in 30 ± 2 DEG C of temperature
Lower maintenance 14 days, it is primary every 12h watering during maintenance, it keeps brick solid wet, later takes brick solid from chest
Out, in dry hardening 28 days under room temperature, so that the moisture in brick solid is volatilized completely, the heat insulation inner core is made.
The measured performance parameter of thermal coefficient and voltage endurance capability, measuring method are carried out to heat insulation inner core made from comparative example 4
With embodiment 1, measurement result is shown in Table 1.
In table 1, the measurement standard of compressive resistance and thermal coefficient is JG T 266-2011.
Table 1
As it can be seen from table 1 in the identical situation of total mass of raw material, improving iron in heat insulation inner core prepared by embodiment 1 ~ 4
Tailing dosage can slightly reduce its density, but will lead to the reduction of pressure-resistant performance；The dosage for improving cement can increase its resistance to pressure
Degree still will increase its density；The dosage for increasing expanded perlite can effectively reduce its density but can reduce its pressure resistance accordingly
Performance, it is thus determined that most ratio of greater inequality is score meter by weight, with 30 parts of iron tailings, 60 parts of cement, 30 parts of expanded perlite, diminishing
1 part of agent, 1 part of rubber powder, 2 parts of carboxymethyl cellulose, 1 part of foaming agent, 0.1 part of foam stabilizer.
Relative to heat insulation inner core prepared by embodiment 1 ~ 4, comparative example 1 increases quality of the iron tailings in entirety, causes
Its voltage endurance capability reduces.This is because the excessive iron tailings being added in comparative example 1 occupies the skeleton structure of cement formation, and iron
There is no cementitiousness to make viscosity whole in the drying process inadequate for tailing itself, so as to cause voltage endurance capability reduction.
And in the preparation process of 2 heat insulation inner core of comparative example, quality of the expanded perlite in entirety is increased, guarantor is resulted in
Warm core strength is very low, this is because the characteristic that expanded perlite is more crisp, reduces heat insulation inner core overall structure to a certain extent
On compressive resistance, increasing perlite can accomplish to reduce thermal coefficient, but integral heat insulation inner core excessively fragility is not available, thus
The additive amount of expanded perlite need to be in suitable range.
Comparative example 3 increases quality of the cement in entirety, results in heat insulation inner core intensity, density, thermal coefficient and increases
Add, this is because being solid characteristic after cement formation concrete, increases to a certain extent resistance in heat insulation inner core overall structure
Compressive Strength, solid construction heat transfer rapidly, so increase hot coefficient, but integral heat insulation inner core it is excessively heavy with it is expensive.
Comparative example 4 is not added with foaming agent, and the intensity, density, thermal coefficient of heat insulation inner core is caused to increase.This is because hair
Infusion and perlite synergistic effect, so that heat insulation inner core lightweight and heat preservation.If the foam for having lacked foaming agent generation is participated,
Expanded perlite is used alone to accomplish light thermal-insulation, then needing the amount of perlite larger, can not show a candle to the two synergistic effect.
By above embodiments and comparative example it is found that the present invention provides one kind with iron tailings, cement, foaming agent, expansion treasure
Zhu Yan is the method that raw material prepares heat insulation inner core, comprising: is recycled to the thinner iron tailings resource of particle；It is a series of in progress
After raw material screening, raw material proportioning, post-processing, there is heat insulation inner core obtained preferable compressive property and lower thermally conductive
Coefficient；Heat insulation inner core obtained is also in fields extensive applications such as heat preservation, buildings.Microlight-type iron tailings provided by the invention is protected
The preparation condition of warm inner core is mild, and short preparation period largely handles solid waste, is easy to industrialize.
Content described in this specification is only to enumerate to inventive concept way of realization, and protection scope of the present invention is not answered
When the concrete form for being seen as limited by embodiment and being stated.
Claims (6)
1. a kind of heat insulation inner core prepared using iron tailings powder as raw material, it is characterised in that according to parts by weight, including with the following group
Point: 10 ~ 80 parts of iron tailings powder, 20 ~ 150 parts of cement, 5 ~ 60 parts of expanded perlite, 0.1 ~ 10 part of additive, foaming agent
0.1 ~ 5 part, 0.05 ~ 1 part of foam stabilizer；The additive is made of melamine water reducing agent, rubber powder and carboxymethyl cellulose, described
The weight ratio of melamine water reducing agent, rubber powder and carboxymethyl cellulose is 1: 0.5 ~ 1.5: 1 ~ 10.
2. a kind of heat insulation inner core prepared using iron tailings powder as raw material as described in claim 1, it is characterised in that by weight
Number meter, including following components: 15 ~ 60 parts of iron tailings powder, 50 ~ 120 parts of cement, 10 ~ 45 parts of expanded perlite, additive 1
~ 5 parts, 0.5 ~ 3 part of foaming agent, 0.08 ~ 0.5 part of foam stabilizer；The weight of the melamine water reducing agent, rubber powder and carboxymethyl cellulose
Amount is than being 1: 0.8 ~ 1.2: 1 ~ 3.
3. a kind of heat insulation inner core prepared using iron tailings powder as raw material as claimed in claim 2, it is characterised in that by weight
Number meter, including following components: 30 parts of iron tailings powder, 60 parts of cement, 30 parts of expanded perlite, 4 parts of additive, foaming agent 1
Part, 0.1 part of foam stabilizer；The weight ratio of the melamine water reducing agent, rubber powder and carboxymethyl cellulose is 1: 1: 2.
4. a kind of method for preparing heat insulation inner core as described in claim 1 as raw material using silica hydrogel, feature exist
In by weight, comprising the following steps:
S1: grinding iron tailings and be sieved, obtains iron tailings powder；
S2: take 10 ~ 80 parts of iron tailings powder, 20 ~ 150 parts of cement, 5 ~ 60 parts of expanded perlite, additive 0.1 obtained by step S1 ~
10 parts of mixing, add 20 ~ 200 parts of water and stir evenly, obtain concrete slurry；
S3: 0.1 ~ 5 part of foaming agent, 0.05 ~ 1 part of foam stabilizer are taken, and is diluted with 10 ~ 200 parts of water, the solution for diluting formation is foaming
It is foamed after obtaining tiny and stable foam, be added into the concrete slurry of S2 and stirred evenly in device, foamed
Slurry；
S4: foamed slurry obtained by step S3 is poured into mold, and 6 ~ 15min is kept under 4 ~ 6 MPa pressurized conditions, starches foaming
Material forms height tight in a mold, then 10 ~ 35h of constant pressure and dry at a temperature of 20 ~ 35 DEG C, the foam in foamed slurry
Rupture and moist part evaporation, and inner core solid is formed in a mold；
S5: the inner core solid in step S4 mold is demoulded, and is put into the chest that humidity is 75 ~ 95% and is supported at 20 ~ 45 DEG C
Shield 7 ~ 21 days, it is primary every 12h watering during maintenance, it keeps inner core solid wet, later takes out inner core solid from chest,
In dry hardening 25 ~ 30 days under room temperature, so that the moisture in inner core solid is volatilized completely, the heat insulation inner core is made.
5. a kind of method for preparing heat insulation inner core as raw material using silica hydrogel as claimed in claim 4, feature exist
In step S1, the mesh number of obtained iron tailings powder is more than 120 mesh.
6. a kind of method for preparing heat insulation inner core as raw material using silica hydrogel as claimed in claim 4, feature exist
In step S4, before foamed slurry pours into mold, mould inner surface carries out processing of putting the oil, in order to later period demoulding.
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