CN106052393B - Chlorination furnace lining and preparation method thereof - Google Patents
Chlorination furnace lining and preparation method thereof Download PDFInfo
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- CN106052393B CN106052393B CN201610364031.4A CN201610364031A CN106052393B CN 106052393 B CN106052393 B CN 106052393B CN 201610364031 A CN201610364031 A CN 201610364031A CN 106052393 B CN106052393 B CN 106052393B
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- pouring layer
- pouring
- chlorination furnace
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
- F27D1/0009—Comprising ceramic fibre elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/10—Monolithic linings; Supports therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
Abstract
The invention discloses a kind of chlorination furnace linings and preparation method thereof, chlorination furnace lining, including liner ontology, liner ontology includes that the outer pouring layer (2) being bonded to each other and interior pouring layer (1), outer pouring layer (2) and interior pouring layer (1) are all made of phosphate pouring material hybrid ceramic cellucotton moulding by casting successively from outside to inside；The manufacturing method of chlorination furnace lining is：The outer pouring layer template of setting in shell (3), then match pouring layer castable out, castable is poured into after its drying demould in template and is handled to form outer pouring layer (2), then interior pouring layer (1) making is finished with identical method, then is passed through into chlorination furnace 50 DEG C, 100 DEG C, 200 DEG C, 500 DEG C and 800 DEG C of hot gas and continues 72,24,12,6 and 4 hours respectively.Using the chlorination furnace of liner of the present invention, its failure rate is low in process of production, and the time between overhauls(TBO) is significantly increased, and maintenance cost substantially reduces, and the service life of chlorination furnace greatly prolongs.
Description
Technical field
The present invention relates to a kind of inner lining of furnace, especially a kind of chlorination furnace lining of Titanium Dioxide Produced by Chloride Procedure.
Background technology
Currently, chloridising is to prepare a kind of the most commonly used method of titanium dioxide, and chlorination furnace is preparing titanium white through chlorination process powder
Core equipment, preparing titanium white through chlorination process powder early period, need chlorine being passed through in chlorination furnace and react production with titanium mineral
Titanium tetrachloride, the temperature of chlorination furnace conversion zone is close to 1000 DEG C, and furnace pressure is in tiny structure, and chlorination furnace lining is by material and chlorine
Violent scour, furnace inner environment are easily corroded in acidity, service life and guarantee four of the chlorination furnace lining to raising chlorination furnace
Very crucial effect is played in being smoothed out for titanium chloride production.
Existing chlorination furnace lining structure is typically followed successively by phosphate pouring material, fireproof high-alumina brick, fire resisting from inside to outside
Clay brick and high-alumina refractory castable, and its thickness is respectively：Phosphate pouring material layer is 230mm, and fire-retardant high aluminium brick layer is
230mm, fire clay brick layer are 230mm, and high-alumina refractory cast bed of material is 190mm, and liner overall thickness is 880mm.But it is this
Structure and there can be the following problem with the liner of material：It is that level is more first, under furnace high-temperature effect, between layers
It will be layered, cause entire liner that cannot sinter an entirety into；Secondly because the liner of this structure type is adopted
Material is different and its thermal coefficient is higher, causes the thermal coefficient of entire liner higher, when in-furnace temperature exists
Its thermal coefficient is in 3.95W/m.k or so at 1000 DEG C or so so that the heat insulation of entire liner is poor, and skin temperature is usual
150 DEG C or more can be reached；It is that liner integral strength is low again, its general compressive resistance is less than 35MPa；It is finally resistance to high alumina
The liner of fiery cast bed of material structure its shrinking percentage under high temperature action is higher, it will causes chlorination furnace to generate in the process of running and splits
Shell is corroded to make high temperature chlorine channel to liner outer layer from these crackles or gap, influences chlorination furnace by line or gap
Normal operation；Based on above-mentioned problem, cause the failure rate of this kind of chlorination furnace lining higher, to reduce maintenance week
Phase increases maintenance cost, meanwhile, the service life of chlorination furnace can also shorten.
Invention content
Technical problem to be solved by the invention is to provide a kind of chlorination furnace linings and preparation method thereof, use the present invention
Its failure rate is low in process of production for the chlorination furnace of liner, can increase considerably the time between overhauls(TBO), improve the production efficiency of chlorination furnace,
Simultaneously, moreover it is possible to substantially reduce the maintenance cost of chlorination furnace and effectively extend the service life of chlorination furnace.
The technical solution adopted by the present invention to solve the technical problems is：Chlorination furnace lining, including liner ontology, liner sheet
Body is the layer structure of MULTILAYER COMPOSITE, and the liner ontology includes the outer pouring layer being bonded to each other and interior cast successively from outside to inside
Layer, outer pouring layer and interior pouring layer are all made of phosphate pouring material hybrid ceramic cellucotton moulding by casting.
Further, the castable of the outer pouring layer is by YB/T5083-1997《Clayey and High-Alumina density fireproof pour
Material feeding》In LL-60 types phosphate pouring material, GB/T3003-2006《Refractory material ceramic fibre and product》In BF-120
Type ceramic fiber cotton and phosphoric acid mix, and wherein BF-120 types ceramic fiber cotton accounts for LL-60 type phosphate pouring material mass ratioes
2~4%, phosphoric acid accounts for the 18~22% of LL-60 type phosphate pouring material mass ratioes, and its mass concentration is 80% or more；Institute
The castable of interior pouring layer is stated by YB/T5083-1997《Clayey and High-Alumina density fireproof castable》In LL-75 type phosphorus
Hydrochlorate castable, GB/T3003-2006《Refractory material ceramic fibre and product》In BF-150 types ceramic fiber cotton and phosphoric acid
It mixes, wherein BF-150 types ceramic fiber cotton accounts for the 0.8~1.2% of LL-75 type phosphate pouring material mass ratioes, and phosphoric acid accounts for
The 16~20% of LL-75 type phosphate pouring material mass ratioes, and its mass concentration is 80% or more.
Further, the BF-120 types ceramic fiber cotton account for LL-60 type phosphate pouring material mass ratioes 2.5~
3.5%, the BF-150 types ceramic fiber cotton accounts for the 0.9~1.1% of LL-75 type phosphate pouring material mass ratioes.
Further, the phosphoric acid for constituting outer pouring layer accounts for the 19~21% of LL-60 type phosphate pouring material mass ratioes, and phosphorus
Sour mass concentration is 85%；The phosphoric acid of pouring layer accounts for the 17~19% of LL-75 type phosphate pouring material mass ratioes, and phosphorus in constituting
Sour mass concentration is 85%.
Further, the interior cast layer thickness ranging from 150mm~450mm, outer cast layer thickness ranging from 150mm~
450mm。
The present invention also provides a kind of methods making the chlorination furnace lining, include the following steps：
Make outer pouring layer：Outer pouring layer template is set in shell, is kept between outer pouring layer template and inner walls
Spacing, the preparation of outer pouring layer castable are set：The phosphate pouring material of apolegamy and ceramic fiber cotton are put into proportion first
In container, then it is proportionally added into phosphoric acid into the container, then stirs the phosphate pouring material, ceramic fiber cotton and phosphoric acid
Uniformly, it is no less than again stirring for uniformly, castable being poured into outer pouring layer template, layered is poured into a mould after 24 hours after its immersion
Jolt ramming, after material feeding dry tack free to be poured and demoulding after continuing waiting for 24 hours or more；
Then the making of interior pouring layer is completed with above step：Pouring layer template, interior cast in setting in outer pouring layer 2
Setting spacing, the preparation of interior pouring layer castable are kept between layer template and outer pouring layer 2：The phosphate of apolegamy is poured into a mould first
Material and ceramic fiber cotton are put into container in proportion, then phosphoric acid is proportionally added into the container, then pour the phosphate
Material feeding, ceramic fiber cotton and phosphoric acid stir evenly, and after its immersion are no less than again stirring for that uniformly, castable being poured into after 24 hours
In outer pouring layer template, layered jolt ramming is poured into a mould, is demoulded after material feeding dry tack free to be poured and after continuing waiting for 24 hours or more；
After inside and outside pouring layer all makes, then hot gas is passed through into chlorination furnace successively and carries out constant temperature processing, by low temperature
To high temperature, the cryogenic thermostat not higher than 50 DEG C is no less than 72 hours, the medium temperature constant temperature not higher than 200 DEG C is no less than 36 hours and not
High temperature constant temperature higher than 800 DEG C is no less than 10 hours.
Further, the medium temperature constant temperature and high temperature constant temperature are divided to two constant temperature zones to carry out respectively.
Further, it is passed through 50 DEG C, 100 DEG C, 200 DEG C, 500 DEG C and 800 DEG C of hot gas and continues 72,24,12,6 and 4 respectively
Hour.
The beneficial effects of the invention are as follows：Using the chlorination furnace of liner of the present invention, its failure rate will be big in process of production
It is big to reduce, the time between overhauls(TBO) is increased considerably, the maintenance cost of chlorination furnace is substantially reduced, improves the production efficiency of chlorination furnace, meanwhile,
The service life of chlorination furnace can also effectively be extended.
Description of the drawings
Fig. 1 is the structural schematic diagram of chlorination furnace lining of the present invention.
In figure label for：Pouring layer in 1-, the outer pouring layers of 2-, 3- shells.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, the chlorination furnace lining of the present invention, including liner ontology, liner ontology are the stratiform knot of MULTILAYER COMPOSITE
Structure, the liner ontology include the outer pouring layer being bonded to each other and interior pouring layer, outer pouring layer and interior cast successively from outside to inside
Layer is all made of phosphate pouring material hybrid ceramic cellucotton moulding by casting.
The outer pouring layer 2 is by YB/T5083-1997《Clayey and High-Alumina density fireproof castable》In LL-60 types
Phosphate pouring material, GB/T3003-2006《Refractory material ceramic fibre and product》In BF-120 types ceramic fiber cotton and phosphorus
Acid is constituted, and inventor after a large number of experiments by having found, when BF-120 types ceramic fiber cotton and mass concentration divide for 85% phosphoric acid
When not accounting for the 2.5~3.5% and 19~21% of LL-60 type phosphate pouring material mass ratioes, the outer pouring layer 2 that is made of them
Performance is preferable, especially, when BF-120 types ceramic fiber cotton and mass concentration account for LL-60 type phosphate respectively for 85% phosphoric acid
When the 3% of castable mass ratio and 20%, the performance of outer pouring layer 2 reaches best；The interior pouring layer 1 is by YB/T5083-
1997《Clayey and High-Alumina density fireproof castable》In LL-75 types phosphate pouring material, GB/T3003-2006《Fire resisting
Material ceramic fibre and product》In BF-150 types ceramic fiber cotton and phosphoric acid constitute, equally, after inventor is by a large number of experiments
It was found that when the phosphoric acid that BF-150 types ceramic fiber cotton and mass concentration are 85% accounts for LL-75 type phosphate pouring material quality respectively
When the 0.9~1.1% of ratio and 17~19%, the performance for the interior pouring layer 1 being made of them is preferable, especially, when BF-150 types
The phosphoric acid that ceramic fiber cotton and mass concentration are 85% accounts for the 1.0% and 18% of LL-75 type phosphate pouring material mass ratioes respectively
When, the performance of interior pouring layer 1 reaches best；In addition, when the thickness of interior pouring layer 1 and outer pouring layer 2 be respectively 200mm and
When 300mm, the performance of chlorination furnace lining entirety is very good.
Embodiment 1
The specific manufacturing process of the chlorination furnace lining of the present invention is as follows：
The making of outer pouring layer：The outer pouring layer template of setting, outer pouring layer template are made of steel plate in shell 3 first,
It can guarantee that template does not walk, do not shift, not spillage with enough intensity, between outer pouring layer template and inner walls
Spacing is 300mm, then carries out the preparation of outer pouring layer castable：First by 1 ton of LL-60 types phosphate pouring material and 0.03 ton
BF-120 type ceramic fiber cottons are put into container, and container herein is channel steel, then 200kg mass concentrations are added into the channel steel and are
Then 85% phosphoric acid stirs evenly the phosphate pouring material, ceramic fiber cotton and phosphoric acid, after it is impregnated 24 hours again
It is secondary to stir evenly；Castable is poured into outer pouring layer template, and jolt ramming is layered using vibrator immediately, when castable table
Face slowly extracts vibrator out after returning slurry, and after material feeding dry tack free to be poured and continue waiting for 24 hours will outer pouring layer template
It removes, the making of outer pouring layer 2 at this time finishes, and after form removable, quality examination is carried out by external pour mass in time, if it find that bee
Nest, peeling and cavity and other issues, it is necessary to be studied for a second time courses one has flunked processing in time to it；Then it is poured in setting in outer pouring layer 2 again
Layer template is noted, the spacing between interior pouring layer template and outer pouring layer 2 is 200mm, the preparation and cast of interior pouring layer castable
Process is identical with the preparation of outer pouring layer castable, casting process, and only the phosphate pouring material dosage of LL-75 types is 1
The ceramic fiber cotton dosage of ton, BF-150 types is 0.01 ton, and phosphoric acid dosage is 180kg, and its mass concentration is also 85%；
It after inside and outside pouring layer all makes, then is passed through into chlorination furnace 50 DEG C of hot gas and continues 72 hours, continue later to chlorination furnace
It is inside passed through 100 DEG C of hot gas and continues 24 hours, be then passed through 200 DEG C of hot gas again and continue 12 hours, be passed through 500 DEG C again later
Hot gas continues 6 hours, is finally passed through 800 DEG C of hot gas again and continues 4 hours, it can be used to be produced after the completion of whole process
Work.
The chlorination furnace lining of the present invention is the material for being made of outer pouring layer 2 and interior pouring layer 1, and constituting inside and outside pouring layer
Expect that model is close, so inside and outside pouring layer can be sintered to an entirety, will not occur point in high temperature action lower liner
Layer, globality is stronger, and structure is also very simple；Furthermore inside and outside cast bed of material is with phosphate pouring material similar in two kinds of models
For base-material, and phosphate pouring material itself has certain thermal shock resistance, slag-resistant aggressivity, and impact resistance is stronger, pressure resistance
Intensity is higher, along with the thermal coefficient of ceramic fiber cotton itself is very low, distinguishes when ceramic fiber cotton similar in two kinds of models
After being mixed in a certain ratio the inside and outside pouring layer for constituting liner of the present invention with phosphate pouring material similar in two kinds of models, it can make
The thermal coefficient of entire liner substantially reduces, and when reaction in furnace temperature is 1000 DEG C or so, the thermal coefficient of interior pouring layer 1 exists
0.9W/m.k or so, the thermal coefficient of outer pouring layer 2 is in 0.3W/m.k or so, and the temperature general who has surrendered of chlorination stove outer covering can protect always
It holds at 100 DEG C hereinafter, effectively enhancing the heat insulation of liner；Meanwhile ceramic fiber cotton itself has very high intensity, when
After using ceramic fiber cotton similar in two kinds of models as the constituent of the inside and outside pouring layer of liner of the present invention, liner can be made whole
The compressive resistance of body further enhances, and at 110 DEG C, the compressive resistance of interior pouring layer 1 is 45MPa, the compressive resistance of outer pouring layer 2
For 40MPa；Finally, due to which the chlorination furnace lining of the present invention eliminates high-alumina refractory cast bed of material, and ceramic fiber cotton itself
Shrinking percentage it is very low, using ceramic fiber cotton similar in two kinds of models as the constituent of the inside and outside pouring layer of liner of the present invention
Afterwards, the shrinking percentage of entire liner can be made to substantially reduce, its liner is cracked or stitched in the process of running to avoid chlorination furnace
Gap, and then prevent high temperature chlorine from channeling to corrosion removal chlorination furnace shell 3 outside liner from the crackle of generation or gap, and influence chlorination
The normal operation of stove；In conclusion using the chlorination furnace of liner of the present invention, its failure rate will drop significantly in process of production
Low, the time between overhauls(TBO) extended to 36 months by original 18 months, greatly reduces the maintenance cost of chlorination furnace, improves chlorination furnace
Production efficiency, meanwhile, the service life of chlorination furnace is also effectively extended.
Claims (7)
1. a kind of production method of chlorination furnace lining, the chlorination furnace lining includes liner ontology, and the liner ontology is
The layer structure of MULTILAYER COMPOSITE, liner ontology include the outer pouring layer being bonded to each other successively from outside to inside（2）With interior pouring layer
（1）, outer pouring layer（2）With interior pouring layer（1）It is all made of phosphate pouring material hybrid ceramic cellucotton moulding by casting, feature exists
In：The production method includes the following steps：
Make outer pouring layer：In shell（3）The outer pouring layer template of interior setting, outer pouring layer template and shell（3）It is protected between inner wall
Hold setting spacing, the preparation of outer pouring layer castable：The phosphate pouring material of apolegamy and ceramic fiber cotton are put in proportion first
Enter in container, then be proportionally added into phosphoric acid into the container, then stirs the phosphate pouring material, ceramic fiber cotton and phosphoric acid
It mixes uniformly, is no less than again stirring for uniformly, castable being poured into outer pouring layer template, the time-division is poured into a mould after 24 hours after its immersion
Layer jolt ramming demoulds after material feeding dry tack free to be poured and after continuing waiting for 24 hours or more；
Then the making of interior pouring layer is completed with above step：In outer pouring layer（2）Pouring layer template in interior setting, interior pouring layer
Template and outer pouring layer（2）Between keep setting spacing, the preparation of interior pouring layer castable：The phosphate of apolegamy is poured into a mould first
Material and ceramic fiber cotton are put into container in proportion, then phosphoric acid is proportionally added into the container, then pour the phosphate
Material feeding, ceramic fiber cotton and phosphoric acid stir evenly, and after its immersion are no less than again stirring for that uniformly, castable being poured into after 24 hours
In outer pouring layer template, layered jolt ramming is poured into a mould, is demoulded after material feeding dry tack free to be poured and after continuing waiting for 24 hours or more；
After inside and outside pouring layer all makes, then hot gas is passed through into chlorination furnace successively and carries out constant temperature processing, by low temperature to height
Temperature, the cryogenic thermostat not higher than 50 DEG C is no less than 72 hours, the medium temperature constant temperature not higher than 200 DEG C is no less than 36 hours and is not higher than
800 DEG C of high temperature constant temperature is no less than 10 hours.
2. the production method of chlorination furnace lining as described in claim 1, it is characterised in that：The medium temperature constant temperature and high temperature constant temperature
It is divided to two constant temperature zones to carry out respectively.
3. the production method of chlorination furnace lining as claimed in claim 2, it is characterised in that：Be passed through 50 DEG C, 100 DEG C, 200 DEG C,
500 DEG C and 800 DEG C of hot gas continues 72,24,12,6 and 4 hours respectively.
4. the production method of chlorination furnace lining as described in claim 1, it is characterised in that：The outer pouring layer（2）Cast
Material is by YB/T5083-1997《Clayey and High-Alumina density fireproof castable》In LL-60 types phosphate pouring material, GB/
T3003-2006《Refractory material ceramic fibre and product》In BF-120 types ceramic fiber cotton and phosphoric acid mix, wherein
BF-120 type ceramic fiber cottons account for the 2~4% of LL-60 type phosphate pouring material mass ratioes, and phosphoric acid accounts for the cast of LL-60 type phosphate
Expect the 18~22% of mass ratio, and its mass concentration is 80% or more；The interior pouring layer（10）Castable by YB/T5083-
1997《Clayey and High-Alumina density fireproof castable》In LL-75 types phosphate pouring material, GB/T3003-2006《Fire resisting
Material ceramic fibre and product》In BF-150 types ceramic fiber cotton and phosphoric acid mix, wherein BF-150 types ceramic fibre
Cotton accounts for the 0.8~1.2% of LL-75 type phosphate pouring material mass ratioes, and phosphoric acid accounts for the 16 of LL-75 type phosphate pouring material mass ratioes
~20%, and its mass concentration is 80% or more.
5. the production method of chlorination furnace lining as claimed in claim 4, it is characterised in that：The BF-120 types ceramic fiber cotton
The 2.5~3.5% of LL-60 type phosphate pouring material mass ratioes are accounted for, the BF-150 types ceramic fiber cotton accounts for LL-75 type phosphate
The 0.9~1.1% of castable mass ratio.
6. the production method of chlorination furnace lining as claimed in claim 4, it is characterised in that：Constitute outer pouring layer（2）Phosphoric acid
Account for the 19~21% of LL-60 type phosphate pouring material mass ratioes, and phosphoric acid quality a concentration of 85%；Pouring layer in constituting（1）Phosphorus
Acid accounts for the 17~19% of LL-75 type phosphate pouring material mass ratioes, and phosphoric acid quality a concentration of 85%.
7. the production method of chlorination furnace lining as described in claim 1, it is characterised in that：The interior pouring layer（1）Thickness model
It encloses for 150~450mm, outer pouring layer（2）Thickness range is 150~450mm.
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| CN201610364031.4A CN106052393B (en) | 2016-05-26 | 2016-05-26 | Chlorination furnace lining and preparation method thereof |
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| CN201610364031.4A CN106052393B (en) | 2016-05-26 | 2016-05-26 | Chlorination furnace lining and preparation method thereof |
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| CN106052393B true CN106052393B (en) | 2018-09-25 |
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| CN113686153A (en) * | 2021-10-27 | 2021-11-23 | 南通嘉浩防腐工程有限公司 | Roasting furnace with corrosion-resistant effect |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| BE465426A (en) * | 1944-08-16 | |||
| CN2335953Y (en) * | 1997-12-19 | 1999-09-01 | 夏云凯 | Chlorinating fluidizing furnace for purifying natural flaky graphite |
| CN101664660B (en) * | 2008-09-05 | 2013-01-16 | 贵阳铝镁设计研究院有限公司 | Lining structure of boiling chlorination furnace |
| CN102515264B (en) * | 2011-11-09 | 2014-09-03 | 攀钢集团工程技术有限公司 | Boiling chlorination furnace and manufacturing method thereof |
| CN203629308U (en) * | 2013-10-31 | 2014-06-04 | 河南龙兴钛业有限公司 | Lining structure of chlorination furnace in titanium tetrachloride production process |
| CN203719410U (en) * | 2013-11-01 | 2014-07-16 | 攀枝花钢企欣宇化工有限公司 | Lining structure of chlorination furnace |
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Effective date of registration: 20191012 Address after: 644004 No.61, West Gangyuan Road, Lingang Economic Development Zone, Yibin City, Sichuan Province Co-patentee after: Yibin Tianyuan Haifeng Hetai Co., Ltd. Patentee after: YiBin TianYuan Group Co., Ltd. Address before: 644000 No. 1, middle Yuan Road, lower Jiangbei, Sichuan, Yibin Patentee before: YiBin TianYuan Group Co., Ltd. |
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