CN110436908A - A method of cordierite is prepared using gangue - Google Patents
A method of cordierite is prepared using gangue Download PDFInfo
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- CN110436908A CN110436908A CN201910788928.3A CN201910788928A CN110436908A CN 110436908 A CN110436908 A CN 110436908A CN 201910788928 A CN201910788928 A CN 201910788928A CN 110436908 A CN110436908 A CN 110436908A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- 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
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
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- 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
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- 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
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- 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
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- C04B2235/428—Silicon
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract
The invention discloses a kind of methods for preparing cordierite using gangue, comprising the following steps: S1, pulverizes coal gangue into gangue powder；S2, by the compression moulding after mixing, ball milling, granulation of coal gangue powder, silicon powder, magnesia powder, alumina powder and potassium carbonate, obtain green body；S3, above-mentioned green body is carried out calcining at high temperature cordierite is made.The present invention uses gangue to prepare cordierite as raw material, realizes waste utilization and reduces production cost, and the preparation method is simple, production energy consumption reduces, industrialization easy to accomplish.
Description
Technical field
The present invention relates to inorganic metallic materials technical fields, and in particular to a kind of side that cordierite is prepared using gangue
Method.
Background technique
Cordierite is a kind of silicate mineral, has lower thermal expansion coefficient (2 × 10-6C-1Left and right), higher decomposition
Coefficient and hardness, good thermal shock, dielectric constant is low, and dielectric loss is small, therefore in fields such as metallurgy, electronics, automobile, chemical industry
It has broad application prospects.But in nature, the distribution content of cordierite is lower, seldom enrichment of ore-forming, therefore industry
It is mostly artificial synthesized with cordierite.As cordierite material is in the application of multiple fields, it is synthetically prepared and obtains state in recent years
Inside and outside extensive concern.
In the prior art, it about there are many kinds of the preparation methods of cordierite, including solid-phase synthesis, hydrothermal synthesis method, helps
Solvent monocrystalline method of formation etc..But most common in commercial synthesis or high-temperature solid phase reaction method, because of opposite other methods, Gu
The simple production process of phase synthesi, raw material sources are abundant, advantage of lower cost.And in order to further reduce the cost and protection ring
Border, people also focus on preparing cordierite as Material synthesis using various waste materials.
Gangue is as the by-product in coal production process, it has also become China's burden and year output are maximum, occupy
Accumulate the most trade waste in place.Cordierite needed for gangue is prepared as currently on the market, not only can solve heap
The pollution problem to environment is put, good economic benefit can also be created, is a kind of behavior turned waste into wealth, made the best use of everything.
Currently, the main problems faced of the preparation process of cordierite is the high-temperature calcination for needing the long period, the prior art
Preparation process is at high cost, energy consumption is high.Therefore, the technique using gangue production cordierite is improved and is of great significance.
Summary of the invention
The technical problems to be solved by the present invention are: providing one kind, low energy consumption, at low cost, simple process, environmental-friendly, appearance
It is easy to realize industrial production the method for preparing cordierite.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: a kind of to prepare cordierite using gangue
Method, comprising the following steps:
S1, gangue powder is pulverized coal gangue into；
S2, gangue powder made from step S1 and silicon powder, magnesia powder, alumina powder and potassium carbonate are mixed to prepare and are matched
After closing material, then the compression moulding after ball milling and granulation, obtain green body；
S3, by green body made from the step S2 carry out calcining cordierite is made.
Further, the quality proportioning in the batch of the step S2 is respectively as follows: coal gangue powder 60~70%, silicon powder 10
~20%, magnesia powder 10~13%, alumina powder 5~10%, potassium carbonate 0.2~0.5%.
Preferably, silicon powder, magnesia powder, alumina powder and potassium carbonate are that chemistry is pure.
Further, calcination temperature is (1350~1390) DEG C in the step S3, and the time is (3.5~4.5) hour.
Preferably, calcination temperature is 1380 DEG C, time 4h.
Further, in the mechanical milling process of the step S2, ball: material=(1.8~2.2): 1, the total time of grinding is (20
~40) minute.
Further, the speed in the mechanical milling process is (350~400) rpm.
Preferably, in the mechanical milling process of the step S2, ball: material=2:1, the total time of grinding are 30 minutes.
Further, the step S2 granulation process is plus water is granulated, and the additional amount of moisture is 4%.
Further, the pressing pressure of green body is (15~16) MPa in the step S2.
Further, the gangue chemical composition in the step S1 are as follows: Al2O335~40%, SiO240~50%,
Fe2O3< 0.5%, TiO2< 0.5%, Na2O < 0.3%, CaO < 0.5%, loss on ignition 15~20%.
Further, coal gangue powder material granularity is 250 mesh or more.
Further, the method also includes before calcination, green body is dried；Preferably, at the drying
Reason is specially that green body is placed in 105 DEG C of dryings 2 hours or so.
The beneficial effects of the present invention are: the present invention program using coal gangue as raw material, not only realizes waste gangue
Comprehensive utilization, while being greatly reduced the cost of material of production cordierite.Meanwhile a small amount of potassium carbonate is added as mineralising
Agent reduces synthesis temperature；In product made from the present invention program, cordierite phase content is high, and the insufficient silicon of content, aluminium, magnesium are equal
It is added in the form of an oxide, content and cordierite the theory composition that can effectively control each oxide in formula are consistent；It will calcining
Temperature is reduced to 1380 DEG C from current 1420 DEG C or so, and soaking time dropped to 4 hours or so from 6 hours or so, reduced energy
Consumption, it is economic and environment-friendly.This method is easy to operate, only need to simply crush, the purpose of invention can be realized in ball milling, molding, calcining, tool
There is good prospects for commercial application.
Detailed description of the invention
Fig. 1 is the XRD spectrum of cordierite obtained in the embodiment of the present invention；
Fig. 2 schemes for the SEM of cordierite obtained in the embodiment of the present invention.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
The most critical design of the present invention is: adding a small amount of potassium carbonate as mineralizer, synthesis temperature is reduced；Content
Insufficient silicon, aluminium, magnesium are added in the form of an oxide, and it is theoretical can effectively to control the content of each oxide and cordierite in formula
Composition is consistent, so that cordierite content is high in final product.
The embodiment of the present invention are as follows: a method of cordierite is prepared using gangue, specific preparation manipulation is as follows:
S1, chemical composition is chosen are as follows: SiO244%；Al2O335.5%；Fe2O30.2%；TiO20.4%；Na2O
0.03%；CaO 0.15%；The gangue that loss on ignition is 19.5%, being ground into average particle size is 20 microns (i.e. 625 mesh)
Powder.
S2,677 grams of the above-mentioned gangue powder after grinding is weighed, 145 grams of silicon powder, 118 grams of magnesia powder, alumina powder 60
Gram, 3 grams of potassium carbonate, silicon powder, magnesia powder, alumina powder, potassium carbonate are the pure specification of chemistry.Above-mentioned raw materials are put into high speed
It dry grinds in (380rpm) ball grinder, ball: material=2:1 is ground 30 minutes altogether.The mixed powder after mill adds water to be granulated (water quantity altogether
For 4%), and blocky green body is pressed under 15MPa pressure.
S3, green body is put into 105 DEG C drying 2 hours in electric heating blast dry oven, this bulk green body is then placed in height
It is calcined in temperature test kiln, 1380 DEG C of calcination temperature, after heat preservation 4 hours, is cooled to room temperature.
It takes cordierite made from aforesaid operations to analyze by XRD (X-ray diffraction) material composition, ties
Fruit is as shown in Figure 1, as can be seen from Figure 1 cordierite made from the present invention program has the feature of cordierite and the brilliant sharp stone of magnalium
Peak, the cordierite phase content prepared is up to 95% or more.
Take cordierite made from aforesaid operations by SEM (Scanning Electron Microscope) to material morphology
Structure is analyzed, as a result as shown in Figure 2, it is seen that its pattern quality is good.
In the embodiment of the present invention, using trade waste gangue as primary raw material, add suitable silicon powder, magnesia powder,
Alumina powder is raw material, and additional a small amount of potassium carbonate is mineralizer, not only at low cost, but also has unique minerals commonly used in chemical industry group
At mainly by Al2O3、SiO2, MgO composition, while also contain a certain amount of K2The impurity such as O, these impurity can significantly reduce
The reaction synthesis temperature of cordierite.In addition, the high speed ball grinding technique that the present invention uses, can be refined to nanometer for the particle of raw material
Grade, the formation of convenient cordierite.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (10)
1. a kind of method for preparing cordierite using gangue, which comprises the following steps:
S1, gangue powder is pulverized coal gangue into；
S2, gangue powder made from step S1 and silicon powder, magnesia powder, alumina powder and potassium carbonate are mixed to prepare batch
Afterwards, then through ball milling and compression moulding after granulation, green body is obtained；
S3, by green body made from the step S2 carry out calcining cordierite is made.
2. a kind of method for preparing cordierite using gangue according to claim 1, which is characterized in that the step S2
Batch in quality proportioning be respectively as follows: coal gangue powder 60~70%, silicon powder 10~20%, magnesia powder 10~13%, oxygen
Change aluminium powder 5~10%, potassium carbonate 0.2~0.5%.
3. a kind of method for preparing cordierite using gangue according to claim 1, which is characterized in that the step S3
Middle calcination temperature is (1350~1390) DEG C, and the time is (3.5~4.5) hour；Preferably, calcination temperature is 1380 DEG C, the time
For 4h.
4. a kind of method for preparing cordierite using gangue according to claim 1, which is characterized in that the step S2
Mechanical milling process in, ball: material=(1.8~2.2): 1, grind (20~40) minute；Preferably, ball: material=2:1, grinding it is total
Time is 30 minutes.
5. a kind of method for preparing cordierite using gangue according to claim 1, which is characterized in that the step S2
Middle addition moisture is granulated；Preferably, the additional amount of moisture is 4%.
6. a kind of method for preparing cordierite using gangue according to claim 1, which is characterized in that the step S2
The pressing pressure of middle green body is (15~16) MPa.
7. a kind of method for preparing cordierite using gangue according to claim 1, which is characterized in that the gangue
Chemical composition are as follows: Al2O335~40%, SiO240~50%, Fe2O3< 0.5%, TiO2< 0.5%, Na2O < 0.3%,
CaO < 0.5%, loss on ignition 15~20%.
8. a kind of method for preparing cordierite using gangue according to claim 7, which is characterized in that the silicon powder,
Magnesia powder, alumina powder and potassium carbonate are the pure specification of chemistry.
9. a kind of method for preparing cordierite using gangue according to claim 1, which is characterized in that the gangue
The granularity of powder is 250 mesh or more.
10. a kind of described in any item methods for preparing cordierite using gangue according to claim 1~9, which is characterized in that
The method also includes green body is dried before calcination.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759741A (en) * | 2019-12-02 | 2020-02-07 | 怀化市华恒莫来石有限公司 | Low-expansion-coefficient cordierite |
| CN110950671A (en) * | 2019-11-14 | 2020-04-03 | 湖南德景源科技有限公司 | Preparation process for synthesizing high-erosion-resistance cordierite material from coal gangue |
| CN115196952A (en) * | 2022-06-08 | 2022-10-18 | 山西超牌煅烧高岭土有限公司 | Preparation method of cordierite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110950671A (en) * | 2019-11-14 | 2020-04-03 | 湖南德景源科技有限公司 | Preparation process for synthesizing high-erosion-resistance cordierite material from coal gangue |
| CN110759741A (en) * | 2019-12-02 | 2020-02-07 | 怀化市华恒莫来石有限公司 | Low-expansion-coefficient cordierite |
| CN115196952A (en) * | 2022-06-08 | 2022-10-18 | 山西超牌煅烧高岭土有限公司 | Preparation method of cordierite |
| CN115196952B (en) * | 2022-06-08 | 2023-06-20 | 山西超牌煅烧高岭土有限公司 | Preparation method of cordierite |
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Application publication date: 20191112 |
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| WW01 | Invention patent application withdrawn after publication |