CN110002858A - The refractory material and preparation method thereof that flue gas corrodes under the conditions of a kind of high temperature resistant - Google Patents
The refractory material and preparation method thereof that flue gas corrodes under the conditions of a kind of high temperature resistant Download PDFInfo
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- CN110002858A CN110002858A CN201910385898.1A CN201910385898A CN110002858A CN 110002858 A CN110002858 A CN 110002858A CN 201910385898 A CN201910385898 A CN 201910385898A CN 110002858 A CN110002858 A CN 110002858A
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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
- 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
- C04B35/10—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 aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- 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
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
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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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
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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
- C04B2235/6567—Treatment time
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
Abstract
The invention discloses the refractory materials and preparation method thereof that flue gas under the conditions of a kind of high temperature resistant corrodes, the refractory material is by refractory raw material and accounts for the adhesive of refractory raw material quality 5-7% and is mixed, the refractory raw material consists of the following components in percentage by weight: 65-70% aluminium oxide, 20-25% zirconium oxide, 5-15% sodium oxide molybdena.Preparation process is: in proportion mixing each material powder, high temperature is kneaded after adhesive is added, and then through cold isostatic compaction, drying, sintering, standard refractory brick is made.Refractory material produced by the present invention can satisfy 1000-2000 DEG C of bottom of furnace body of hot environment of plasma gasification furnace, and can be resistant to flue gas erosion, and production cost is low.
Description
Technical field
The present invention relates to fire resisting material fields, and in particular to a kind of flue gas corrodes under the conditions of high temperature resistant refractory material and its
Preparation method.
Background technique
For response environment problem and due to the deficiency in final process place, as the processing method of municipal refuse, in recent years
There is the melting furnace directly by dangerous waste slag melt process, heat source is plasma torch.Flying dust is by gasification and melting
Ash obtained from the waste gas dedusting of furnace.Incineration of refuse flyash generates flue gas after melting, and melts smoke secondary flying dust chemical composition
Based on chloride, this is mainly due to a large amount of chloride ion is contained in flying dust, Cl has very strong oxidisability, main component
Are as follows: FeCl2、CaCl2、MgCl2、MnCl2、ZnCl2、PbCl2Deng.Chloride is easy to occur with other components anti-in melting process
It answers, therefore is badly in need of developing a kind of furnace body with the good high temperature resistant material that resistance to flue gas corrodes simultaneously as plasma gasification furnace
Top material.
Currently, the refractory material used for melting furnace mainly has clay product and metal oxide materials, for
Common clay fire resistant materials will generally be lower than 1000 DEG C for the operation temperature of furnace body, the high temperature resistance of this material
It is not able to satisfy the operation requirement of plasma gasification melting furnace.Zircon corundum brick is to be using industrial alumina powder and selected zircon sand
Raw material, manufactured ZrO2The refractory product that content is 33%~45%.The high temperature resistance of zircon corundum brick is good, but production cost
It is larger, and the content of zirconium oxide is higher, production cost is also higher.In addition, the resistance to flue gas erosiveness of common zircon corundum brick is weak, make
It is short with the service life.
In order to solve problems, urgent need develops a kind of refractory material, can either meet 1000-2000 DEG C of upper of furnace body
Hot environment, while the characteristic that there is preferable resistance to flue gas to corrode.
Summary of the invention
The object of the present invention is to provide the refractory materials that flue gas under the conditions of a kind of high temperature resistant corrodes, and can satisfy plasma (orifice) gas
Change 1000-2000 DEG C of upper of furnace body of hot environment of furnace, and can be resistant to flue gas erosion.
It is a further object of the present invention to provide the preparation method for the refractory material that flue gas under the conditions of high temperature resistant corrodes, technique letters
It is single.
To achieve the above object, The technical solution adopted by the invention is as follows: under the conditions of a kind of high temperature resistant flue gas corrode it is resistance to
Fiery material is mixed by refractory raw material and the adhesive for accounting for refractory raw material quality 5-7%, and the refractory raw material is by following heavy
The group of amount percentage is grouped as: 65-70% aluminium oxide, 20-25% zirconium oxide, 5-15% sodium oxide molybdena.
Preferably, the refractory raw material consists of the following components in percentage by weight: 65% aluminium oxide, 25% zirconium oxide,
10% sodium oxide molybdena.
Preferably, the aluminium oxide, zirconium oxide, sodium oxide molybdena granularity be respectively less than 400 mesh.Since each raw material are with higher
Purity and thinner granularity, make made of product have better performance.
Preferably, described adhesive is condensation of aluminum phosphate.
The present invention also provides the preparation methods of the refractory material of ash attack under the conditions of above-mentioned high temperature resistant, including following step
It is rapid:
(1) it weighs each raw material powder of aluminium oxide, zirconium oxide, sodium oxide molybdena respectively in mass ratio, is uniformly mixed, be then added former
Expect the adhesive of gross mass 5-7%, 5-10min is mixed, then high speed is kneaded 15-20min；
(2) material after kneading is placed in super-pressure compression moulding in cold isostatic press, wet base is made；
(3) wet base is put into drier dry；
(4) dried green body is put into electric furnace and is sintered, 2200 DEG C of sintering temperature, time 15h, standard refractory is made
Brick.
Preferably, in step (2), briquetting pressure 210Mpa.
Preferably, in step (3), drying temperature is 100-150 DEG C.
Compared with prior art, the invention has the following beneficial effects:,
1, for the erosion of chloride and sour gas in flue gas, the present invention is added a certain amount of in refractory material
Sodium oxide molybdena, alkaline sodium oxide molybdena can be reacted with the acidic materials in flue gas, in the Surface Creation film of material, and then be hindered
Hinder erosion of the flue gas for refractory material.
2, refractory material of the invention is meeting bottom of furnace body based on aluminium oxide, supplemented by zirconium oxide, sodium oxide molybdena
Under 1000-2000 DEG C of hot conditions, reduces the content of zirconium oxide, reduce production cost.
Detailed description of the invention
Fig. 1 is revolution erosion test schematic diagram；
Fig. 2 is refractoriness test schematic diagram.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
The refractory material that flue gas corrodes under the conditions of a kind of high temperature resistant, by refractory raw material and accounts for refractory raw material quality 6%
Adhesive condensation of aluminum phosphate is mixed, and the refractory raw material consists of the following components in percentage by weight: 65% aluminium oxide,
25% zirconium oxide, 10% sodium oxide molybdena.
Preparation step is as follows:
(1) it weighs each raw material powder of aluminium oxide, zirconium oxide, sodium oxide molybdena respectively in mass ratio, is uniformly mixed, be then added former
Expect the adhesive condensation of aluminum phosphate of gross mass 5-7%, 5-10min is mixed, then high speed is kneaded 15-20min；
(2) material after kneading is placed in cold isostatic press, with the super-pressure compression moulding of 210MPa, wet base is made,
Size is 230mm*150mm*75mm；
(3) wet base is put into drying in drier, drying temperature is 100-150 DEG C；
(4) dried green body is put into electric furnace and is sintered, 2200 DEG C of sintering temperature, time 15h, standard refractory is made
Brick.
Embodiment 2
The refractory material that flue gas corrodes under the conditions of a kind of high temperature resistant, by refractory raw material and accounts for refractory raw material quality 5%
Adhesive is mixed, and the refractory raw material consists of the following components in percentage by weight: 70% aluminium oxide, 25% zirconium oxide,
5% sodium oxide molybdena.
Preparation method is the same as embodiment 1.
Embodiment 3
The refractory material that flue gas corrodes under the conditions of a kind of high temperature resistant, by refractory raw material and accounts for refractory raw material quality 5%
Adhesive is mixed, and the refractory raw material consists of the following components in percentage by weight: 65% aluminium oxide, 20% zirconium oxide,
15% sodium oxide molybdena.
Preparation method is the same as embodiment 1.
The resistance to ash attack of refractory material is tested
The salt of gas, generally NaCl and Ca (OH) can be generated in flying dust2And 3 kinds of the mixture of both.As schemed
Show, these gas occurring sources are fitted into alumina crucible, standard refractory brick brick prepared by embodiment 1 is buried into people wherein, and make
Lower half portion is embedded in gas occurring source, and with 1500 DEG C of heat preservation 96h in electric furnace, standard refractory brick is taken out, and horizontal section is cut
Gas source is observed for the depth of erosion and penetration depth of refractory brick in face.The erosion that refractory material obtained by testing is corroded by flue gas
Depth and penetration depth see the table below.
Table 1 turns round the depth of erosion and penetration depth that etching measures refractory material
Note: the component of common zircon corundum brick is SiO218-20%, ZrO235-40%, Al2O335-40%.
It can be obtained by experiment, fused alumina zirconia material obtained by the present invention, material has good lower ash attack resistant to high temperatures
Effect.
The refractoriness of refractory material is tested
Each ingredient relative mass proportioned raw material are chosen, is put into mortar and be ground to it and can pass through
The testing sieve of 180um is formed with the powdered sample of water reconciliation using test cone molding die.Refractory material is first passed through
1500 DEG C of pre-burning, then molded test is bored.Configure three kinds of standard pyrometric cones: (wherein N is 1600 DEG C of temperature nearby by N, N+1, N-1
The thermoscope of degree, N+1, N-1 are the standard pyrometric cone of N high No.1 and low No.1).Sample standard cone is placed in 2mm- on frustum
In the hole of 3mm, fixed using fire clay.
Frustum is placed in the equal temperate zone of stove, furnace temperature is risen to 1500 DEG C within the 1.5-2h time, later according to 2.5 DEG C/min
Speed at the uniform velocity heat up, until any test cone is curved touches frustum down to it.The form of record and test sample and standard cone, sentences
Break resistance to material temperature.Resistance to material prepared by the application, heatproof degree are 1630 DEG C, meet the demand of plasma gasification melting furnace.
Claims (7)
1. the refractory material that flue gas corrodes under the conditions of a kind of high temperature resistant, which is characterized in that by refractory raw material and account for refractory raw material
The adhesive of quality 5-7% is mixed, and the refractory raw material consists of the following components in percentage by weight: 65-70% oxidation
Aluminium, 20-25% zirconium oxide, 5-15% sodium oxide molybdena.
2. the refractory material that flue gas corrodes under the conditions of a kind of high temperature resistant according to claim 1, which is characterized in that described resistance to
Fiery raw material consists of the following components in percentage by weight: 65% aluminium oxide, 25% zirconium oxide, 10% sodium oxide molybdena.
3. the refractory material that flue gas corrodes under the conditions of a kind of high temperature resistant according to claim 1 or 2, which is characterized in that institute
State aluminium oxide, zirconium oxide, sodium oxide molybdena granularity be respectively less than 400 mesh.
4. the refractory material that flue gas corrodes under the conditions of a kind of high temperature resistant according to claim 1 or 2, which is characterized in that institute
Stating adhesive is condensation of aluminum phosphate.
5. a kind of preparation method for the refractory material that flue gas corrodes under the conditions of high temperature resistant of any of claims 1 or 2, feature exist
In, comprising the following steps:
(1) it weighs each raw material powder of aluminium oxide, zirconium oxide, sodium oxide molybdena respectively in mass ratio, is uniformly mixed, it is total that raw material is then added
5-10min is mixed in the adhesive of quality 5-7%, then high speed is kneaded 15-20min；
(2) material after kneading is placed in super-pressure compression moulding in cold isostatic press, wet base is made；
(3) wet base is put into drier dry；
(4) dried green body is put into electric furnace and is sintered, 2200 DEG C of sintering temperature, time 15h, standard refractory brick is made.
6. the preparation method for the refractory material that flue gas corrodes under the conditions of high temperature resistant according to claim 5, which is characterized in that
In step (2), briquetting pressure 210Mpa.
7. the preparation method for the refractory material that flue gas corrodes under the conditions of high temperature resistant according to claim 5, which is characterized in that
In step (3), drying temperature is 100-150 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5403794A (en) * | 1994-04-14 | 1995-04-04 | Vesuvius Crucible Company | Alumina-zirconia refractory material and articles made therefrom |
| CN104446545A (en) * | 2014-11-25 | 2015-03-25 | 淄博旭硝子刚玉材料有限公司 | Fusing refractory material damper block and preparation method thereof |
| CN104829217A (en) * | 2015-03-31 | 2015-08-12 | 苏州维泰生物技术有限公司 | Corrosion resistant alumina ceramic and preparation method thereof |
| CN105036716A (en) * | 2015-07-09 | 2015-11-11 | 长兴泓矿炉料有限公司 | Corrosion-resistant refractory material and preparation method therefor |
| CN108752017A (en) * | 2018-04-25 | 2018-11-06 | 郑州新光色耐火材料有限公司 | Corhart Zac-block and preparation method thereof |
| CN109251018A (en) * | 2018-10-11 | 2019-01-22 | 宜兴市海科耐火材料制品有限公司 | A kind of dedicated anti-erosion highiy refractory brick of liquid waste incineration and preparation method thereof |
| CN109384448A (en) * | 2018-11-16 | 2019-02-26 | 旭贞新能源科技(上海)有限公司 | Abrasion resistant corrosion resistant coating and its preparation process suitable for boiler back end ductwork metal base |
-
2019
- 2019-05-09 CN CN201910385898.1A patent/CN110002858A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5403794A (en) * | 1994-04-14 | 1995-04-04 | Vesuvius Crucible Company | Alumina-zirconia refractory material and articles made therefrom |
| CN104446545A (en) * | 2014-11-25 | 2015-03-25 | 淄博旭硝子刚玉材料有限公司 | Fusing refractory material damper block and preparation method thereof |
| CN104829217A (en) * | 2015-03-31 | 2015-08-12 | 苏州维泰生物技术有限公司 | Corrosion resistant alumina ceramic and preparation method thereof |
| CN105036716A (en) * | 2015-07-09 | 2015-11-11 | 长兴泓矿炉料有限公司 | Corrosion-resistant refractory material and preparation method therefor |
| CN108752017A (en) * | 2018-04-25 | 2018-11-06 | 郑州新光色耐火材料有限公司 | Corhart Zac-block and preparation method thereof |
| CN109251018A (en) * | 2018-10-11 | 2019-01-22 | 宜兴市海科耐火材料制品有限公司 | A kind of dedicated anti-erosion highiy refractory brick of liquid waste incineration and preparation method thereof |
| CN109384448A (en) * | 2018-11-16 | 2019-02-26 | 旭贞新能源科技(上海)有限公司 | Abrasion resistant corrosion resistant coating and its preparation process suitable for boiler back end ductwork metal base |
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