CN108503336A - A method of manufacturing foamed ceramic thermal insulation material using red mud - Google Patents
A method of manufacturing foamed ceramic thermal insulation material using red mud Download PDFInfo
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- CN108503336A CN108503336A CN201810353509.2A CN201810353509A CN108503336A CN 108503336 A CN108503336 A CN 108503336A CN 201810353509 A CN201810353509 A CN 201810353509A CN 108503336 A CN108503336 A CN 108503336A
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
- C04B33/1322—Red mud
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
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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
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
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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
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
- C04B2235/3212—Calcium phosphates, e.g. hydroxyapatite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The present invention provides a kind of method manufacturing foamed ceramic thermal insulation material using red mud, this method includes the following steps：Red mud, shraff and other burdening calculations are weighed as raw material and tentatively broken, mixing is to obtain the raw material of coarse crushing, wherein with the total weight of raw material, the mass percentage of red mud is 33~40%, and the mass percentage of shraff is 30~40%；The raw material, foaming agent and foam stabilizer of coarse crushing are packed into ball mill progress ball milling to be then dried, the powder batch being uniformly mixed；It is granulated after adding water into powder batch, the raw material for meeting grain composition is retained after screening；The raw material for meeting grain composition are put into refractory-material dies and are molded, and are dried；It is fired, cools down, to obtain foamed ceramic thermal insulation material.According to the method for the present invention, preparation process is simple, firing temperature is low, reduces foamed ceramic production cost, solves to obtain ideal economic benefit while environmental issue.
Description
Technical field
An exemplary embodiment of the present invention relates to solid slag treatment technology and building heat preservation ceramic material fields, specifically
Ground is related to a kind of method manufacturing foamed ceramic thermal insulation material using red mud.
Background technology
Red mud, also referred to as red soil are that the pollution generated when aluminium oxide is refined in aluminium metallurgical industry field from bauxite is given up
Slag.The red mud discharge of one ton of about 0.8~2.0 ton of aluminium oxide is often produced, the red mud utilization rate in China is less than 4% at present.Make
For an alumina producing big country, the annual red mud cumulant in China is considerable, and a large amount of red mud cannot be effectively utilised,
It can only stockyard stacking.The red mud not only land occupation resource of alkalinity, can also penetrate into earth's surface, bring serious soil and water body dirty
Dye, huge pressure is brought to the efforts at environmental protection of enterprise.
The physicochemical property of red mud determines that it has the characteristics that using the low and difficult utilization of degree, at present red mud master at home
To be used for making acid modifying agent, for cement processed or be processed to hollow-brick block for building etc..
However, the method that there is no recycling red mud well at present.
Invention content
In order to solve the above-mentioned problems in the prior art, exemplary embodiment of the present invention provides a kind of utilization
The method that metallurgy of aluminium red mud waste material produces foamed ceramic.
In view of the deficiencies of the prior art, the present invention provides a kind of a large amount of red mud resources that can will be generated in aluminium metallurgical industry
Change the method utilized.The present invention is modified red mud by formula, makes its satisfaction on the basis of traditional foamed ceramic technique
The process of certain operational characteristic, then fires foamed ceramic thermal insulation material, to make the money of red mud as primary raw material
Sourceization is utilized and is possibly realized.It is modified by the red mud of the primary raw material to being used as foamed ceramic thermal insulation material, by broken and pottery
Satisfactory foamed ceramic thermal insulation material is obtained after the mixing of porcelain waste material, grinding, drying, granulation, die-filling, firing, heat preservation, to
Red mud is set to get utilization.The usage amount of red mud may be up to 40wt%, and solid waste incorporation is up to 70wt%.
Include according to a kind of method manufacturing foamed ceramic thermal insulation material using red mud of the example embodiment of inventive concept：
A method of foamed ceramic thermal insulation material being manufactured using red mud, the method includes following step：By red mud, shraff and
Other burdening calculations are weighed as raw material and tentatively broken, mixing is to obtain the raw material of coarse crushing, wherein with the total weight of raw material
The mass percentage of meter, red mud is 33~40%, and the mass percentage of shraff is 30~40%；By the raw material of coarse crushing
Ball mill is packed into carry out ball milling and then be dried, the powder batch being uniformly mixed；Water is added into powder batch
After be granulated, retain after screening and meet the raw material of grain composition；The raw material for meeting grain composition are put into refractory-material dies
Middle molding, and dried；It is fired, cools down, to obtain foamed ceramic thermal insulation material.
In the exemplary embodiment, red mud is that aluminium industry extracts remaining pollution waste residue when aluminium oxide；Shraff is
Ceramic polished powdered scrap, ceramic post-processing cutting waste material, ceramic product waste, domestic ceramics waste and sanitary ceramics are useless
At least one of gurry；Other dispensings are red clay.
In the exemplary embodiment, the fineness of powder batch is more than 200 mesh.
In the exemplary embodiment, in granulation step, based on the total weight of powder batch, the water of 18wt% is added.
In the exemplary embodiment, the grain diameter for meeting the raw material of grain composition is less than 0.5mm.
In the exemplary embodiment, the firing step includes using the burning process that heats up step by step, and by final firing temperature
Degree control is in the range of 1180 DEG C~1200 DEG C and keeps the temperature a period of time, then with stove cooled to room temperature.
In the exemplary embodiment, the burning process to heat up step by step includes the following steps：With the heating rate of 8~12 DEG C/min
It is raised to 490~510 DEG C from room temperature；It is raised to 890~910 DEG C with the heating rate of 5~8 DEG C/min；With the heating of 3~5 DEG C/min
Rate is raised to 990~1010 DEG C；With the heating rate of 1~3 DEG C/min firing temperature is raised to from 1180~1200 DEG C.
In the exemplary embodiment, use silica as releasing agent in forming step
The beneficial effects of the invention are as follows：
(I) waste red mud residues can be largely consumed, solve the problems, such as pollution and waste that red mud accumulation generates.Red mud processing cost
It is low, solve enterprise's problem.
(II) production cost that foamed ceramic thermal insulation material is significantly reduced using red mud as primary raw material, red mud is become
Waste be changed into values, and notable benefit is brought for enterprise.
(III) production technology is relatively simple, and firing condition requires relatively low, it is easy to accomplish large-scale production.
Specific implementation mode
Example embodiments of the present invention will now be described.However, the present invention can be embodied in many different forms, without
It should be construed as limited to embodiment set forth herein.
In general, foamed ceramic thermal insulation material is using silicon, bauxite clay mineral as main component, it is former by the way that high-temperature solvent is added
The ingredients such as material, foaming agent are burnt into the insulation of high porosity of holding one's breath at a suitable temperature through processes such as grinding processing, moldings
Porous ceramic film material.Porous ceramic film material has the characteristics that thermal coefficient is low, density is small, sound insulation, fire-retardant, waterproof, corrosion resistant,
It is a kind of novel green material, will be produced and used in large quantities in future.
For recycling red mud, according to the present invention, on the basis of traditional foamed ceramic technique, by being formulated to red
Mud is modified, and makes it as primary raw material to fire foamed ceramic thermal insulation material, to make it possible the recycling of red mud.
Method using red mud manufacture foamed ceramic thermal insulation material will be described in detail belows.
According to the present invention, include using the method that red mud manufactures foamed ceramic thermal insulation material：By red mud, shraff and its
His burdening calculation weigh and it is tentatively broken, mix to obtain the raw material of coarse crushing, wherein the mass percentage of red mud for 33~
40%, the mass percentage of shraff is 30~40%；By the raw material, foaming agent and foam stabilizer of coarse crushing be packed into ball mill into
Then row ball milling is dried, the powder batch being uniformly mixed；It is granulated, is sieved after adding water into powder batch
Retain the raw material for meeting grain composition after point；The direct stone of raw material is entered mold forming to dry；It is fired, cools down, to
Obtain foamed ceramic thermal insulation material.
The method for manufacturing foamed ceramic thermal insulation material using red mud is described hereinafter with reference to specific embodiment.
First, red mud, shraff and other burdening calculations are weighed and tentatively broken, mixing is to obtain the original of coarse crushing
Material, to prepare for next step process.In the exemplary embodiment, red mud is that aluminium industry extracts remaining pollution when aluminium oxide
Property waste residue.Shraff is ceramic polished powdered scrap, ceramic post-processing cutting waste material, ceramic product waste, domestic ceramics
At least one of waste and sanitary ceramics waste.Exemplary embodiment according to the present invention, the total weight based on raw material
The mass percentage of meter, red mud is 33~40%, and the mass percentage of shraff is 30~40%.Other dispensings can be with
For clay or other clay minerals, dispensing can be used for improving blank performance, and adjust blank physicochemical property (for example,
Plasticity, shrinkage, ion exchangeable etc.), improve melting characteristic.In one embodiment, other dispensings are red clay.
Then, the raw material of coarse crushing is fitted into ball mill progress ball milling to be then dried in drying machine, is uniformly mixed
The powder batch of conjunction.Specifically, the raw material of coarse crushing, foaming agent and foam stabilizer are put into ball mill and carry out ball milling, obtained uniformly
It mixes, the powder batch for the fineness that meets the requirements.The particle storage for obtaining meeting grain composition after drying powder batch waits for
With.In the exemplary embodiment, the fineness of powder batch is more than 200 mesh.In embodiment, foam stabilizer can be calcium phosphate,
Foaming agent can be silicon carbide.In the process, adding foaming agent and foam stabilizer contributes in blank burning process to foam and make
Bubble is stabilized to cooling.
Then, it is granulated after adding water into powder batch, the raw material for meeting grain composition is retained after screening.Specifically
Ground is granulated after adding water in particle after the drying in the exemplary embodiment, retains meet grain composition after screening
Particle is as raw material.By being granulated to the batch after fine crushing, point of material in space after blank molding can be optimized
Cloth state, the distribution situation of liquid phase when to finely tune material melts ensure that product improves product under the premise of being unlikely to burn down
Distribution of pores, optimize the density and intensity of product.In the exemplary embodiment, the water of 18wt% is added in particle after the drying
Start to be granulated, it is desirable that the grain diameter for meeting grain composition is less than 0.5mm.
Then, the raw material for meeting grain composition are put into refractory-material dies and are molded, and dried.Implement in example
In example, the raw material for meeting grain composition are put into refractory-material dies, drying 2h removes moisture.In the exemplary embodiment, may be used
Enter mold forming so that the raw material for meeting grain composition are put into the refractory-material dies of customization direct stone, enters used when mold forming
Releasing agent can be silica.
Finally, the moulding material after drying is fired, cooled down, to obtain foamed ceramic thermal insulation material.In example
In embodiment, the moulding material after drying is put into togerther together with mold in Muffle furnace, through rising step by step from room temperature to firing temperature
The burning process of temperature is sintered, so as to recrystallize crystal form needed for generation after shaping foam；Then heat preservation；After heat preservation certainly with stove
It is so cooled to room temperature, in favor of the generation of new crystal grain, finally obtains foamed ceramic thermal insulation material, to realize metallurgy of aluminium red mud
It efficiently uses.In the exemplary embodiment, soaking time 30min, 1180~1200 DEG C of firing range.The burning to heat up step by step
Technique processed may include：With the heating rate of 8~12 DEG C/min 490~510 DEG C are raised to from room temperature；With the heating of 5~8 DEG C/min
Rate continues to be raised to 890~910 DEG C；Continue to be raised to 990~1010 DEG C with the heating rate of 3~5 DEG C/min；With 1~3 DEG C/min
Heating rate continue to be raised to 1180~1200 DEG C.
According to the present invention, foamed ceramic thermal insulation material is manufactured by using red mud, can largely consume waste red mud residues, is solved
The pollution and waste problem that certainly red mud accumulation generates, and red mud processing cost is low, solves the pollution of Zhi Lv enterprises generation
The reluctant problem of waste residue.In addition, according to the present invention, foamed ceramic heat preservation is significantly reduced using red mud as primary raw material
The production cost of material, red mud is turned waste into wealth, and significant benefit is brought for enterprise.It is according to the present invention to be manufactured using red mud
The method of foamed ceramic thermal insulation material, production technology is relatively simple, and firing condition requires relatively low, it is easy to accomplish extensive raw
Production.
The exemplary reality of the method according to the present invention that foamed ceramic thermal insulation material is manufactured using red mud is detailed below
Apply example.In this respect it is to be noted that for mineral composition, even the same place output of composition be still difficult to ensure chemistry at
The homogeneity divided need to carry out analysis calculating when replacing Similar types of materials in actual production to the concrete content of new and old material chemical component
After use；In addition qualified products not only can be just burnt in a certain determining numerical value, therefore are formulated the chemical composition of the raw material
It is more suitable to provide range.Therefore, the chemical composition of formula material is a range, rather than specific number in example given below
Value.
Example：
By red mud that mass percentage is 33~40%, mass percentage be 30~40% shraff and chapter formula
Red clay, which calculates, to be weighed and is tentatively crushed, mixes to obtain the raw material of coarse crushing.Red mud is the aluminium industry extraction of Wei Qiao foundation group
Remaining pollution waste residue when aluminium oxide.Shraff be ceramic polished powdered scrap, ceramic post-processing cutting waste material, ceramics at
At least one of product waste, domestic ceramics waste and sanitary ceramics waste.
The raw material, foaming agent and foam stabilizer of coarse crushing are put into ball mill and carry out ball milling, is uniformly mixed, fineness is 200
Powder batch more than mesh.It is for use that particle storage of the grain diameter less than 0.5mm is obtained after the drying of powder batch.
It is granulated after the water of addition 18wt% in particle of the grain diameter less than 0.5mm, retains after screening and meet
The particle that grade is matched is as raw material.
The raw material for meeting grain composition are put into the refractory-material dies of customization direct stone and enter mold forming, drying 2h is removed
Moisture is removed, it is silica to enter releasing agent used when mold forming.
Moulding material after drying is put into togerther together with mold in Muffle furnace, through the following burning process to heat up step by step into
Row sintering：With the heating rate of 10 DEG C/min 500 DEG C are raised to from room temperature；With the heating rate of 6 DEG C/min 900 are raised to from 500 DEG C
℃；With the heating rate of 4 DEG C/min 1000 DEG C are raised to from 900 DEG C；With the heating rate of 2 DEG C/min 1190 are raised to from 1100 DEG C
℃.Then heat preservation 30min obtains foamed ceramic thermal insulation material with stove cooled to room temperature after heat preservation, to realize the metallurgy of aluminium
Red mud efficiently uses.
Foamed ceramic thermal insulation material after demoulding can be cut, and the plank for meeting demand is processed into, for house and
The exterior-wall heat insulation of public building has the characteristics that A grades non-ignitable, heat preservation, sound insulation, corrosion resistant；Also it can be processed into brick, as industry
Thermal insulation material uses.
Although specifically describing the present invention, ordinary skill people with reference to example embodiments of the present invention
Member will be understood that, the case where not departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents
Under, it can be in form and details can be made herein various changes.
Claims (8)
1. a kind of method manufacturing foamed ceramic thermal insulation material using red mud, which is characterized in that the method includes following step：
Red mud, shraff and other burdening calculations are weighed as raw material and tentatively broken, mixing is to obtain the raw material of coarse crushing,
Wherein, with the total weight of raw material, the mass percentage of red mud is 33~40%, and the mass percentage of shraff is 30
~40%；
The raw material, foaming agent and foam stabilizer of coarse crushing are packed into ball mill progress ball milling to be then dried, are uniformly mixed
Powder batch；
It is granulated after adding water into powder batch, the raw material for meeting grain composition is retained after screening；
The raw material for meeting grain composition are put into refractory-material dies and are molded, and are dried；
It is fired, cools down, to obtain foamed ceramic thermal insulation material.
2. according to the method described in claim 1, it is characterized in that, red mud, which is aluminium industry, extracts remaining pollution when aluminium oxide
Property waste residue；Shraff is ceramic polished powdered scrap, ceramic post-processing cutting waste material, ceramic product waste, domestic ceramics
At least one of waste and sanitary ceramics waste；Other dispensings are red clay.
3. according to the method described in claim 1, it is characterized in that, the fineness of powder batch is more than 200 mesh.
4. according to the method described in claim 1, it is characterized in that, in granulation step, based on the total weight of powder batch,
Add the water of 18wt%.
5. according to the method described in claim 4, it is characterized in that, the grain diameter for meeting the raw material of grain composition is less than
0.5mm。
6. according to the method described in claim 1, it is characterized in that, the firing step includes using the burning process that heats up step by step,
And final firing temperature is controlled in the range of 1180 DEG C~1200 DEG C to and is kept the temperature a period of time, it is then naturally cold with stove
But to room temperature.
7. according to the method described in claim 6, it is characterized in that, the burning process to heat up step by step includes the following steps：With 8~
The heating rate of 12 DEG C/min is raised to 490~510 DEG C from room temperature；It is raised to 890~910 DEG C with the heating rate of 5~8 DEG C/min；
It is raised to 990~1010 DEG C with the heating rate of 3~5 DEG C/min；It is risen from 1180~1200 DEG C with the heating rate of 1~3 DEG C/min
To firing temperature.
8. according to the method described in claim 1, it is characterized in that, using silica as releasing agent in forming step.
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| CN201810353509.2A CN108503336A (en) | 2018-04-19 | 2018-04-19 | A method of manufacturing foamed ceramic thermal insulation material using red mud |
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| CN201810353509.2A CN108503336A (en) | 2018-04-19 | 2018-04-19 | A method of manufacturing foamed ceramic thermal insulation material using red mud |
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| CN112552072A (en) * | 2020-12-28 | 2021-03-26 | 深圳市华威环保建材有限公司 | Construction waste regenerated foamed ceramic and preparation method thereof |
| CN112960965A (en) * | 2021-02-24 | 2021-06-15 | 中骥新材料有限公司 | Method for utilizing industrial red mud waste powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552072A (en) * | 2020-12-28 | 2021-03-26 | 深圳市华威环保建材有限公司 | Construction waste regenerated foamed ceramic and preparation method thereof |
| CN112960965A (en) * | 2021-02-24 | 2021-06-15 | 中骥新材料有限公司 | Method for utilizing industrial red mud waste powder |
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