CN102839370B - Preparation method of ceramic composite steel tube - Google Patents
Preparation method of ceramic composite steel tube Download PDFInfo
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- CN102839370B CN102839370B CN201210317497.0A CN201210317497A CN102839370B CN 102839370 B CN102839370 B CN 102839370B CN 201210317497 A CN201210317497 A CN 201210317497A CN 102839370 B CN102839370 B CN 102839370B
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Abstract
The invention discloses a preparation method of a ceramic composite steel tube, which is characterized by comprising the following processing steps of: powder drying, mixing, steel tube treatment, loading, centrifugal reaction, sand burying and slow cooling. By adopting the preparation method, the reaction rate is improved, the defect that the ceramic layer of the composite steel tube has thick two ends and thin middle is overcome, and the corrosion resistance of the transition layer is improved; and the prepared ceramic composite tube has uniform ceramic layer and no flaw, and conforms to the rigor requirements on high-temperature resistance, high-pressure resistance and corrosion resistance of conveying pipelines in the petrochemical industry at present, so that the service life of the conveying pipelines is greatly prolonged and the production and operating cost of the enterprises is lowered.
Description
Technical field:
The present invention relates to from climing combustion high temperature synthesis technical field, is a kind of preparation method of ceramic composite steel pipe specifically, carries composite steel tube for the preparation of high-performance petrochemical complex liquid.
Background technology:
Pipeline transportation has that shipment distance is short, less investment, do not account for or account for less soil, free from environmental pollution, working continuously is subject to the features such as the little and freight charges of external interference are low, plays a part more and more important at petrochemical industry.
Prepare composite steel tube technology from climing combustion and in steel pipe, add exactly iron oxide red, aluminium powder and auxiliary composition mixture, when driving steel pipe rotary, whizzer reaches after certain speed, cause material reaction through tungsten filament heating, material oneself burns immediately, combustion wave rapid spread, a large amount of heat is emitted in reaction, and obtain the melt that iron and aluminum oxide form, under the effect of centrifugal force, heavy iron is distributed between steel pipe and aluminum oxide, and alumina-ceramic and steel pipe inner wall are combined, thereby make ceramic gradient composite steel tube.
Japanese Odawara in 1981 people such as is repaiied and is adopted aluminothermy centrifuging to prepare ceramic gradient composite steel tube, and has applied for a series of patents.In order to reduce the void content in alumina-ceramic layer, Odawara the people such as is repaiied and in reactant, is added MgO, SiO
2, the additive such as Si, Mg, for form the ceramic phase of low melting point in reaction process, thereby improved the density of ceramic layer.The people such as Jin Mingcheng adopt and add SiO in utility model patent " a kind of ceramic composite pipe "
2obtain high-performance ceramic multiple-unit tube.Wish that people's patents of invention such as morning sunlight " centrifugal self-combustion process is produced in the raw materials used formula of ceramic lining-tube " have added metal fluoride, result can havoc environment, produces environmental issue.The people such as Guo Ruihua adopt interpolation blast-furnace slag to reduce costs in its " ceramic-lined composite steel tube and preparation method thereof " patent of invention.
Above-mentioned patent formulation is in actual production process, due to mutually too many in order to improve the low melting glass that compactness introduces, easily in steel pipe process of cooling, cause ceramic layer to present radial cracking, there will be composite steel tube ceramic layer two ends thick, the defect of intermediate thin simultaneously.In fields such as material of construction, mine transport, the conveying of electric power coal and agricultural machinings, although these composite steel tubes can meet service requirements, cannot meet the requirement of petrochemical industry conveying corrosive liquid.
Summary of the invention:
The object of the invention is to overcome the deficiency of above-mentioned prior art, and a kind of preparation method of ceramic composite steel pipe is provided, mainly solve by the change of formula and the adjustment of technique the ceramic composite steel pipe of preparing in prior art and be prone to the problems such as crackle, became uneven, pore.
Technical scheme of the present invention is: a kind of preparation method of ceramic composite steel pipe, and its special character is that it comprises following processing step:
A, powder is dried, is mixed, and will react 80 DEG C of powders and dry 2h, and by proportioning batch mixing 8h, 50～80 DEG C of preheating 2h, can reduce the interior moisture entrapment of powder and improve temperature of reaction; Described reaction powder is made up of the raw material of following weight per distribution ratio, 2～7%CrO
3, 3～8%SiO
2, 1～3%TiO
2or Ti, all the other are Al and Fe
2o
3;
B, steel pipe processing, by steel pipe cutting, internal surface processing of rust removing;
C, charging, centrifugal reaction, pack the powder of a step preheating in the steel pipe of processing into, and the penstock installation that installs powder, to whizzer, is started to whizzer, and centrifuge speed is 1000～1200rpm, with tungsten filament igniting initiation material reaction;
D, buries husky slow cooling, after reaction finishes, imbeds slow cooling 2～5h in sand after unloading steel pipe, can obtain ceramic composite pipe.
Wherein, the Al powder described in a step adopts 325 order Al powder of weight percent 20～35% and 80～65% 100 order Al powder to mix.
Wherein, to adopt temperature be that-5～+ 50 order sands of 20～60 DEG C bury husky slow cooling to the husky slow cooling of burying described in d step.
Compared with the prior art the preparation method of a kind of ceramic composite steel pipe of the present invention has outstanding substantive distinguishing features and marked improvement: 1,, by adopting the collocation of aluminium powder thickness, add part CrO in powder
3, improve speed of response, thereby reduce, composite steel tube ceramic layer two ends are thick, the defect of intermediate thin, Cr can be present in transition layer simultaneously, improves the erosion resistance of transition layer, prevents from causing because of ceramic layer tiny flaw the effect of corrosive fluid corrosion outer layer pipe; 2, after reaction finishes, take to bury husky Insulation, reduce composite steel tube speed of cooling, slowly discharge stress, avoid the appearance of ceramic crackle; 3, the ceramic composite pipe ceramic layer of preparation is even, flawless; Meet the harsh requirement high temperature resistant, high pressure resistant, anti-corrosion to transport pipe of current petroleum chemical industry, in the work-ing life that can significantly improve transport pipe, reduce the production and operation cost of enterprise.
Embodiment:
For Comprehension and Implementation better, describe the present invention in detail below in conjunction with embodiment.
Embodiment 1, accurately takes 200 order Fe of oven dry
2o
3768 grams, powder, 325 52.8 grams, order Al powder, 100 223.2 grams, order Al powder, CrO
360 grams, SiO
260 grams, TiO
236 grams, put into mixer batch mixing 8h, the 60 DEG C of preheating 2h of powder that mix, put into the Φ 108mm through cutting, processing of rust removing, and wall thickness 8mm, in the 20# steel pipe of long 200mm; The penstock installation that installs powder, to whizzer, is started to whizzer, after rotating speed 1160rpm is steady, with tungsten filament igniting initiation material reaction; After reaction finishes, rapidly composite steel tube is unloaded, imbed slow cooling 3h in sand, employing temperature is-5～+ 50 order sands of 40 DEG C, can obtain the ceramic composite pipe of flawless defect.
Embodiment 2, accurately takes 200 order Fe of oven dry
2o
3846 grams, powder, 325 56.4 grams, order Al powder, 100 225.6 grams, order Al powder, CrO
324 grams, SiO
236 grams, 12 grams of Ti, put into mixer batch mixing 8h, and the 50 DEG C of preheating 2h of powder that mix put into the Φ 108mm through cutting, processing of rust removing, and wall thickness 8mm, in the 20# steel pipe of long 200mm; The penstock installation that installs powder, to whizzer, is started to whizzer, after rotating speed 1000rpm is steady, with tungsten filament igniting initiation material reaction; After reaction finishes, rapidly composite steel tube is unloaded, imbed slow cooling 2h in sand, employing temperature is-5～+ 50 order sandy soil of 20 DEG C, can obtain the ceramic composite pipe of flawless defect.
Embodiment 3, accurately takes 200 order Fe of oven dry
2o
3738 grams, powder, 325 86.1 grams, order Al powder, 100 159.9 grams, order Al powder, CrO
384 grams, SiO
296 grams, TiO
236 grams, put into mixer batch mixing 8h, the 80 DEG C of preheating 2h of powder that mix, put into the Φ 108mm through cutting, processing of rust removing, and wall thickness 8mm, in the 20# steel pipe of long 200mm; The penstock installation that installs powder, to whizzer, is started to whizzer, after rotating speed 1200rpm is steady, with tungsten filament igniting initiation material reaction; After reaction finishes, rapidly composite steel tube is unloaded, imbed slow cooling 5h in sand, employing temperature is-5～+ 50 order sandy soil of 60 DEG C, can obtain the ceramic composite pipe of flawless defect.
Claims (3)
1. a preparation method for ceramic composite steel pipe, is characterized in that it comprises following processing step:
A, powder is dried, is mixed, and will react 80 DEG C of powders and dry 2h, by proportioning batch mixing 8h, 50～80 DEG C of preheating 2h; Described reaction powder is made up of the raw material of following weight per distribution ratio, 2～7%CrO
3, 3～8%SiO
2, 1～3%TiO
2or Ti, all the other are Al and Fe
2o
3;
B, steel pipe processing, by steel pipe cutting, internal surface processing of rust removing;
C, charging, centrifugal reaction, pack the powder of a step preheating in the steel pipe of processing into, and the penstock installation that installs powder, to whizzer, is started to whizzer, and centrifuge speed is 1000～1200rpm, with tungsten filament igniting initiation material reaction;
D, buries husky slow cooling, after reaction finishes, imbeds slow cooling 2～5h in sand after unloading steel pipe, can obtain ceramic composite pipe.
2. the preparation method of a kind of ceramic composite steel pipe according to claim 1, is characterized in that the Al powder described in a step adopts 325 order Al powder of weight percent 20～35% and 80～65% 100 order Al powder to mix.
3. the preparation method of a kind of ceramic composite steel pipe according to claim 1, is characterized in that to adopt temperature be that-5～+ 50 order sands of 20～60 DEG C bury husky slow cooling for the husky slow cooling of burying described in d step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317497.0A CN102839370B (en) | 2012-08-31 | 2012-08-31 | Preparation method of ceramic composite steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317497.0A CN102839370B (en) | 2012-08-31 | 2012-08-31 | Preparation method of ceramic composite steel tube |
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| Publication Number | Publication Date |
|---|---|
| CN102839370A CN102839370A (en) | 2012-12-26 |
| CN102839370B true CN102839370B (en) | 2014-06-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557377B (en) * | 2013-11-06 | 2015-09-09 | 周小新 | The preparation method of ceramic-lined composite stainless steel pipe |
| CN104328429B (en) * | 2014-10-10 | 2016-06-22 | 中北大学 | Utilize the method and apparatus that electromagnetic force and mechanical pressure are coated with lined ceramics at steel pipe inner wall |
| CN110123146B (en) * | 2018-02-09 | 2022-04-08 | 佛山市顺德区美的电热电器制造有限公司 | Heating appliance and preparation method thereof |
| CN112377681B (en) * | 2020-11-16 | 2021-12-07 | 席赫 | Wear-resistant oil delivery pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1226451C (en) * | 2001-12-26 | 2005-11-09 | 宝钢集团上海梅山有限公司 | Production process for ceramic composite steel pipe |
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2012
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