CN1566028A - Single layer peelable coating for ceramic roller bar and obtained ceramic roller bar - Google Patents

Single layer peelable coating for ceramic roller bar and obtained ceramic roller bar Download PDF

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Publication number
CN1566028A
CN1566028A CN 03139645 CN03139645A CN1566028A CN 1566028 A CN1566028 A CN 1566028A CN 03139645 CN03139645 CN 03139645 CN 03139645 A CN03139645 A CN 03139645A CN 1566028 A CN1566028 A CN 1566028A
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CN
China
Prior art keywords
coating
ceramic rod
titanium dioxide
protective layer
dioxide
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CN 03139645
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Chinese (zh)
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CN100360473C (en
Inventor
陈兴清
万冬梅
彭刚
冯斌
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Guangdong Jingang New Material Co ltd
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JINGANG NEW MATERIAL CO Ltd FOTAO GUOUP GUANGDONG
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Priority to CNB031396453A priority Critical patent/CN100360473C/en
Publication of CN1566028A publication Critical patent/CN1566028A/en
Application granted granted Critical
Publication of CN100360473C publication Critical patent/CN100360473C/en
Anticipated expiration legal-status Critical
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Abstract

The invention discloses a ceramic roller rod coating and ceramic roller rod employing the coating as protecting layers, wherein the coating or the protecting layer comprises aluminium oxide, titanium oxide, calcium carbonate and silica. The invention realizes good strength and density for the protecting layer.

Description

The ceramic rod of peelable ceramic rod coating of individual layer and gained
Technical field
The present invention relates to a kind ofly can prolong the ceramic rod coating in ceramic rod work-ing life and adopt the prepared ceramic rod of this coating, more particularly, the present invention relates to a kind of ceramic rod coating of can the individual layer starching, can peel off after burning and adopt the prepared ceramic rod of this coating.
Background technology
Building ceramics factory generally adopts roller kiln firing ceramics wall floor tile.In the roller kiln production technique, ceramic rod is supporting and transmits and burn till the key part of product, and is high value easily-consumed products.In the Production of Ceramics process; exist powder at the bottom of the base; thereby glaze drips sticking impurity adhesion ceramic rod and the obnoxious flavour of waiting and corrodes the roller rod barred body reduction ceramic rod problem in work-ing life; particularly produce ornamental brick; the kiln of vitreous brick; because the surface impurity adhesion is serious; average every two weeks or shorter time just need to change or clear up one time the roller rod; traditional roller rod method for cleaning is to adopt grinder buffing; using scabbing on the grinder buffing roller rod; in the process that glaze drips; both time-consuming; power consumption again; the dust pollution and the noise pollution that produce are also very big; and polishing also can cause coup injury by pair roller rod barred body; in general, in bruting process, the loss of roller rod can reach 10-20%.
In order to reduce the wastage rate of ceramic rod, change number of times but prolong its work-ing life with reducing to polish, can use coating to protect ceramic rod.Present employed coating is basically based on commercial alumina and clay, there is the shortcoming of following several respects in such coating: the one, between 1000-1250 ℃, there is not sintering, has loose structure by the formed coating of this coating, thereby intensity and wear resistance are relatively poor, adobe produces friction mutually with coating in operational process, make coating just be worn away in the short period of time, lost the effect of protection roller rod; The 2nd, because the formed coating structure of this coating is loose, porosity is big, and glaze drips easy infiltrate coating and bonds with roller rod barred body, and formation scabs, and this scabbing can only just can polish off same damage roller rod with emery wheel; The 3rd, the coating of being burnt till through high temperature by this coating easily is bonded as one with the roller rod, has to take the method for grinder buffing when removing the coating of gluing glaze.
A kind of ceramic rod with two-layer protective layer is disclosed in the Chinese patent 97209130.0; the coating of this double-layer structure has certain intensity and density behind sintering; can stop glaze to drip infiltrate and with the adhesion of roller rod barred body; and peel off from barred body easily after the cooling; need not grinder buffing, thereby can prevent the damage of roller rod.But this technology also has the shortcoming of himself, as coating is multilayered structure, coating need be coated onto on the roller rod step by step, promptly need on barred body, to apply earlier priming paint, treat after its drying applicator surface coating again, and the gauge control of the end, investment precoat is strict, if control is improper, does not then reach the effect of anticipation.The use operation relative complex of this of this application people technology is not so its occupation rate on market is very big at present.
Summary of the invention
In order to solve the above-mentioned not enough problem of existing in prior technology, the present invention proposes and a kind ofly can on the ceramic rod surface, form coating strippable, the single ply protective layer, mainly contain materials such as aluminum oxide, titanium dioxide, lime carbonate, clay and silicon-dioxide in this coating; A spot of impurity as long as it does not influence the performance of protective layer and the performance of ceramic rod, also can exist.Certainly, the content of impurity is unsuitable too high, in order to avoid influence using and burning performance afterwards of coating.
Aluminum oxide in the above-mentioned coating can be the aluminum oxide of any crystal formation, as α-Al 2O 3, η-Al 2O 3, γ-Al 2O 3Deng, but preferred aluminum oxide is γ-Al 2O 3During hot operation in kiln, the γ-Al in the above-mentioned coating protective layer 2O 3Some or all of the undergoing phase transition of meeting forms α-Al 2O 3Thereby, obtain integrative-structure, fine and close, high-intensity protective layer.
γ-Al in the above-mentioned coating 2O 3Can obtain by using raw materials such as bauxitic clay, commercial alumina, also can be by using other γ-Al 2O 3Raw material and obtaining.
Titanium dioxide in the above-mentioned coating can obtain by using raw materials such as titanium dioxide, rutile titanium dioxide or anatase titanium dioxide, also can obtain by the titanium dioxide raw material that uses other.A kind of preferred mode is to adopt bauxitic clay, contains 92% the γ-Al of having an appointment because remove in the bauxitic clay 2O 3The titanium dioxide that also contains the 4-6% that has an appointment outward.By using a kind of raw material of bauxitic clay, can in coating, obtain alumina component and titanium dioxide component simultaneously as coating.
Lime carbonate in the above-mentioned coating can obtain by using raw materials such as light calcium carbonate powder, heavy calcium carbonate, precipitated chalk powder, calcite or chalk soil, preferably uses the light calcium carbonate powder.
Silicon-dioxide in the above-mentioned coating can obtain by using raw materials such as silica powder or clay, preferentially uses clay, and insufficient section uses silica powder.
In the coating weight of dry state, the weight percentage of titanium dioxide in coating generally is controlled in the scope of 2-12%, is preferably 4-10%.
In the coating weight of dry state, aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide have following weight ratio in the coating:
(aluminum oxide+titanium dioxide): lime carbonate: silicon-dioxide=6-8: 1.5-2.5: 0.5-1.5, preferred part by weight is:
(aluminum oxide+titanium dioxide): lime carbonate: silicon-dioxide=6.5-7.8: 1.8-2.2: 0.8-1.5.
Coating of the present invention should have suitable granularity, so that preparation is coated with slip and makes protective layer have suitable roughness.In general, in sieve number, the granularity of coating is controlled at and is not more than in the 250 purpose scopes, as screenings<0.5g when adopting 325 orders to sieve.
In the above-mentioned coating, below 1300 ℃, its ingredient aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide can not cause corrosive effect to ceramic rod itself.In the operational process, these compositions do not react with roller rod barred body in kiln, can not change the original structural performance of roller rod, thereby have prevented that " vitreous " phenomenon from appearring in the roller rod.
Adopt coating of the present invention after forming protective layer on the ceramic rod, along with ceramic rod use under the high temperature in kiln, the γ-Al in the above-mentioned protective layer 2O 3Some or all of the undergoing phase transition of meeting forms α-Al 2O 3Thereby, obtain integrative-structure, fine and close, high-intensity protective layer; Such protective layer has suitable intensity and density, can stop that glaze drips infiltrate coating and barred body bonding, and the while can be stood the long-term friction of adobe and is not worn away.In addition, in the process that high temperature uses, lime carbonate and silicon-dioxide can partly or wholly react, and form Calucium Silicate powder; And Calucium Silicate powder has the volumetric expansion effect because of crystal conversion in the process of cooling; produce tiny crack in the protective layer of cooling back; can easily peel off by beaing gently from barred body; basically do not need grinder buffing promptly can cleaning roller the rod surface scab and glaze such as drips at impurity; both saved time; do not have dust and noise pollution again, and greatly reduce the wastage rate of roller rod, prolong its work-ing life.
On the other hand; the present invention also provides a kind of ceramic rod that has protective layer; said protective layer can easily be peeled off after described ceramic rod cooling; this protective layer its main ingredient before high temperature uses is aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide; and after high temperature used, its main ingredient was aluminum oxide, titanium dioxide, calcium oxide and silicon-dioxide.
In the above-mentioned ceramic rod, the thickness of its protective layer generally can be controlled between the 0.8-2.0mm before high temperature uses, and preferably is controlled between the 1.0-1.4mm.
In the protective layer of above-mentioned ceramic rod, aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide have following weight ratio:
(aluminum oxide+titanium dioxide): lime carbonate: silicon-dioxide=6-8: 1.5-2.5: 0.5-1.5, preferred part by weight is:
(aluminum oxide+titanium dioxide): lime carbonate: silicon-dioxide=6.5-7.8: 1.8-2.2: 0.8-1.5.
Further specify the present invention below by embodiment, but these embodiment being specific embodiments more of the present invention, is not to be limitation of the present invention.
Embodiment 1
(aluminium vanadine+commercial alumina+titanium dioxide), light calcium carbonate powder and (clay+silica powder) are mixed by 6.5: 2: 1.5 weight ratio, and being mixed with relative density is 1.80-1.95g/cm 3, water ratio is the coating slurry of 32-36%.This coating is screenings<0.5g after 325 mesh sieve sieve.Contain γ-Al of about 92% in the used aluminium vanadine 2O 3Also contain 5% the titanium dioxide of having an appointment outward.Adopt above-mentioned coating slurry to the ceramic rod starching, drench, brush three to four times, will scribble the ceramic rod nature airing of above-mentioned coating then or be placed on oven dry in the kiln.Dry back is about 1.2mm by the thickness of the formed protective layer of above-mentioned coating.The roller rod of band protective layer is after the kiln high temperature section was used in 15 days, and sticking blank particle of coatingsurface and glaze drip few, and there is tiny crack in cooling back coatingsurface, raps easily and peels off; Roller rod Heat stability is good, splits excellent phenomenon and obviously reduces disconnected rod.
Embodiment 2
Prepare coating and on ceramic rod, form protective layer by embodiment 1 identical method; only the blending ratio of (aluminium vanadine+commercial alumina+titanium dioxide), Paris white and (clay+silica powder) is 7.0: 1.8: 1.2, and the formed protective layer thickness of dry back coating is 1.2mm.
Embodiment 3:
Prepare coating and on ceramic rod, form protective layer by embodiment 1 identical method; only the blending ratio of (aluminium vanadine+commercial alumina+titanium dioxide), Paris white and (clay+silica powder) is 7.7: 1.5: 0.8, and the formed protective layer thickness of dry back coating is 1.0mm.
Embodiment 4
Prepare coating and on ceramic rod, form protective layer by embodiment 1 identical method; only the blending ratio of (aluminium vanadine+commercial alumina+titanium dioxide), Paris white and (clay+silica powder) is 7.2: 1.6: 1.2, and the formed protective layer thickness of dry back coating is 0.8mm.
Embodiment 5
Prepare coating and on ceramic rod, form protective layer by embodiment 1 identical method; only the blending ratio of (aluminium vanadine+commercial alumina+titanium dioxide), Paris white and (clay+silica powder) is 6.8: 2.0: 1.2, and the formed protective layer thickness of dry back coating is 1.4mm.
Embodiment 6
Prepare coating and on ceramic rod, form protective layer by embodiment 1 identical method, only use precipitated chalk powder substitute for light calcium carbonate powder.

Claims (10)

1, a kind of ceramic rod coating that is used for the ceramic rod protective layer, this coating is being applied to the ceramic rod surface after high temperature burns till, can be from roller rod sur-face peeling and not with the ceramic rod adhesion; It is characterized in that, contain aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide in this coating.
2, ceramic rod coating as claimed in claim 1 is characterized in that, described aluminum oxide is γ-Al 2O 3
3, ceramic rod coating as claimed in claim 1 is characterized in that, described aluminum oxide is selected from commercial alumina, bauxitic clay and clay.
4, ceramic rod coating as claimed in claim 1 or 2 is characterized in that, described titanium dioxide is selected from bauxitic clay and titanium dioxide.
5, ceramic rod coating as claimed in claim 1 or 2 is characterized in that, the weight percentage of described titanium dioxide in described coating is 2-12%.
6, ceramic rod coating as claimed in claim 1 or 2 is characterized in that, aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide have following weight ratio in the described coating:
(aluminum oxide+titanium dioxide): lime carbonate: silicon-dioxide=6-8: 1.5-2.5: 0.5-1.5.
7, ceramic rod coating as claimed in claim 1 or 2 is characterized in that, the granularity of described coating is not more than 250 orders in the order number.
8, a kind of ceramic rod that has the single ply protective layer, this protective layer can be stripped from after described ceramic rod cooling, it is characterized in that, contains aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide in the described protective layer.
9, ceramic rod as claimed in claim 8 is characterized in that, the thickness of described protective layer is between 0..8-2.0mm.
10, ceramic rod as claimed in claim 8 is characterized in that, aluminum oxide, titanium dioxide, lime carbonate and silicon-dioxide have following weight ratio in the described protective layer:
(aluminum oxide+titanium dioxide): lime carbonate: silicon-dioxide=6-8: 1.5-2.5: 0.5-1.5.
CNB031396453A 2003-07-01 2003-07-01 Single layer peelable coating for ceramic roller bar and obtained ceramic roller bar Expired - Lifetime CN100360473C (en)

Priority Applications (1)

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CNB031396453A CN100360473C (en) 2003-07-01 2003-07-01 Single layer peelable coating for ceramic roller bar and obtained ceramic roller bar

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Application Number Priority Date Filing Date Title
CNB031396453A CN100360473C (en) 2003-07-01 2003-07-01 Single layer peelable coating for ceramic roller bar and obtained ceramic roller bar

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CN1566028A true CN1566028A (en) 2005-01-19
CN100360473C CN100360473C (en) 2008-01-09

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111363387A (en) * 2020-03-19 2020-07-03 佛山市华耐高科化工有限公司 Formula and production process of coking-removing coating for kiln roller
CN112851317A (en) * 2021-01-22 2021-05-28 佛山森蒂泰珂科技有限公司 Roller protection material and preparation method thereof
CN113045302A (en) * 2021-03-24 2021-06-29 福建安溪马斯特陶瓷有限公司 Corrosion-resistant high-strength ceramic roller and preparation method thereof
CN113582708A (en) * 2021-08-23 2021-11-02 佛山市东鹏陶瓷有限公司 Formula and preparation process of rock plate bottom slurry
CN114230372A (en) * 2021-12-22 2022-03-25 连云港太阳光石英陶瓷有限公司 Corrosion-resistant high-strength ceramic roller and preparation method thereof
CN116120096A (en) * 2022-12-20 2023-05-16 湖南泰鑫瓷业有限公司 Composite ceramic rod and preparation method and application thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1079819A (en) * 1993-05-03 1993-12-22 四川省威远县天府陶瓷建筑材料实业公司 A kind of roller type tunnel kiln burning coal for ceramic and burning techniques thereof
CN2301445Y (en) * 1997-05-08 1998-12-23 佛山市陶瓷研究所 Ceramic roller with stripping protective coating

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111363387A (en) * 2020-03-19 2020-07-03 佛山市华耐高科化工有限公司 Formula and production process of coking-removing coating for kiln roller
CN112851317A (en) * 2021-01-22 2021-05-28 佛山森蒂泰珂科技有限公司 Roller protection material and preparation method thereof
CN113045302A (en) * 2021-03-24 2021-06-29 福建安溪马斯特陶瓷有限公司 Corrosion-resistant high-strength ceramic roller and preparation method thereof
CN113045302B (en) * 2021-03-24 2022-08-26 福建安溪马斯特陶瓷有限公司 Corrosion-resistant high-strength ceramic roller and preparation method thereof
CN113582708A (en) * 2021-08-23 2021-11-02 佛山市东鹏陶瓷有限公司 Formula and preparation process of rock plate bottom slurry
CN114230372A (en) * 2021-12-22 2022-03-25 连云港太阳光石英陶瓷有限公司 Corrosion-resistant high-strength ceramic roller and preparation method thereof
CN116120096A (en) * 2022-12-20 2023-05-16 湖南泰鑫瓷业有限公司 Composite ceramic rod and preparation method and application thereof
CN116120096B (en) * 2022-12-20 2024-03-12 湖南泰鑫瓷业有限公司 Composite ceramic rod and preparation method and application thereof

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