CN103629924A - Minor repair method for rotary kiln - Google Patents
Minor repair method for rotary kiln Download PDFInfo
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- CN103629924A CN103629924A CN201310548079.7A CN201310548079A CN103629924A CN 103629924 A CN103629924 A CN 103629924A CN 201310548079 A CN201310548079 A CN 201310548079A CN 103629924 A CN103629924 A CN 103629924A
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- kiln
- rotary kiln
- repair method
- castable
- minor repair
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Abstract
The invention discloses a minor repair method for a rotary kiln. The method comprises the steps that light castable materials are cast three times, construction is carried out from the tail to the head of the kiln, construction is carried out according to 1/3 of the circumferential area of a kiln body every time, static natural state maintenance is carried out for more than 12 hours, and it is ensured that the environment temperature is not lower than 5 DEG C during state maintenance; the casteable materials are cast on a kiln liner strip by strip according to the 10 averagely-divided parts of the circumference, and the included angle of every two adjacent cast strip modules is 36 degrees. According to the minor repair method for the rotary kiln, the repair working period can be greatly shortened, damage of the construction period to other parts of the liner is reduced, and influences on carbon production are reduced.
Description
Technical field
The invention belongs to aluminium carbon element production technical field, particularly a kind of rotary kiln minor repair method.
Background technology
Aluminium with carbon element industry rotary kiln because of its life-span short, and the unfavorable factor such as general overhaul is long in time limit, seriously restricts and has affected the production of carbon element factory.Rational local light maintenance is processed and not only can effectively be extended whole kiln liner service life, prolonging overhaul duration, but also the task that can complete repairs in the short period of time, reduces to repair the impact that the duration produces carbon element.
Former minor repair method:
(1) lightening casting material adopts the artificial platen press of applying, construction minute three casting completes.During construction, from kiln Caudad kiln hood direction, carry out, each construction is undertaken by 1/3 area of kiln body circumference, and static natural Health preservation more than 12 hours, guarantees between preserving period that environment temperature is not less than 5 ℃.
(2) the clay of kiln liner, high alumina castable are poured into a mould one by one by circumference 20 deciles.The angle of cast bar template is 18 °.
The drawback existing:
Construction period long, it is the same with the overhaul duration that the duration is repaired in light maintenance, needs 23 days, as add mechanical part maintenance, repairs the duration longer;
(2) affected by the construction period, other position coolings of liner, liner cracking, causes damage.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of rotary kiln minor repair method, can significantly shorten the light maintenance duration, reduce the damage of construction period to other positions of liner, reduce the impact that carbon element is produced.
To achieve these goals, the technical solution used in the present invention is:
A rotary kiln minor repair method, comprises the steps:
(1) divide cast lightening casting material three times, during construction, from kiln Caudad kiln hood direction, carry out, each construction is undertaken by 1/3 area of kiln body circumference, and static natural Health preservation more than 12 hours, guarantees between preserving period that environment temperature is not less than 5 ℃;
(2) kiln liner is poured into a mould by circumference 10 deciles one by one by castable, and the angle of cast bar template is 36 °.
Described lightening casting material is the fire-resistance rammed mass with heat-insulating property.
Described static natural Health preservation refers to natural Health preservation in the situation that rotary kiln do not rotate.
Described kiln liner castable is clay and high alumina castable, kiln hood 25m high alumina castable wherein, kiln tail 20m clay castable.
Al in described high alumina castable
2o
3content is 48～90%, Al in clay castable
2o
3content is 30～48%.
Compared with prior art, the invention has the beneficial effects as follows:
The method is observed through long-term operation in laboratory, has no adverse effect, and in construction, the light maintenance duration is shortened to 13 days from 23 days.Not only reduce the damage to other positions of kiln liner during light maintenance, effectively extended the service life of rotary kiln integral lining, for carbon element, produced and won the time simultaneously, created considerable economic benefit.
The specific embodiment
Below in conjunction with embodiment, describe embodiments of the present invention in detail.
The present invention is by dissecting rotary kiln material movement angle of repose in process of production to the impact of producing, and propose after practice test proof, principle is as follows:
Bulk cargo can keep the maximum angle (the monolateral angle to ground) of natural stability state when stacking, and is called " angle of repose ".And in moving containers, material can keep the maximum angle of stable state, be called motion angle of repose.
It is reported, the mean value of many dust angles of repose is about 35 °-40 °, relevant with factors such as dust kind, particle diameter, shape and moisture content.In order to measure this data, the mode that has adopted photo to measure, and final measurement determines that the reducing rotary kiln motion angle of repose of I Φ of company 1.74m * 25m/ Φ 1.94m * 20m is 33 °.A kind of attribute that the angle of repose of hence one can see that material produces while being solid accumulation, only relevant with the factor such as material variety, particle diameter, shape and moisture content, and irrelevant with constructional surface size, conclude accordingly and by circumference 10 grades, divide cast by kiln liner.The angle of cast bar template is increased to 36 ° by 18 °, and in rotary kiln, the motion angle of repose of material can not change, naturally can be to not having a negative impact.
Under the prerequisite that can not have a negative impact through theory analysis, on inner certain rotary kiln, to test, feedback effects is fine, does not find adverse effect.
Construction method of the present invention is as follows:
(1) lightening casting material (fire-resistance rammed mass with heat-insulating property) adopts the artificial platen press of applying, construction minute three casting completes.During construction, from kiln Caudad kiln hood direction, carry out, each construction is undertaken by 1/3 area of kiln body circumference, and static natural Health preservation more than 12 hours, guarantees between preserving period that environment temperature is not less than 5 ℃.
(2) the clay of kiln liner, high alumina castable are poured into a mould one by one by circumference 10 deciles.The angle of cast bar template is 36 °, kiln hood 25m DAG-70 high alumina castable wherein, kiln tail 20m DAG-45 clay castable.
Claims (5)
1. a rotary kiln minor repair method, is characterized in that, comprises the steps:
(1) divide cast lightening casting material three times, during construction, from kiln Caudad kiln hood direction, carry out, each construction is undertaken by 1/3 area of kiln body circumference, and static natural Health preservation more than 12 hours, guarantees between preserving period that environment temperature is not less than 5 ℃;
(2) kiln liner is poured into a mould by circumference 10 deciles one by one by castable, and the angle of cast bar template is 36 °.
2. rotary kiln minor repair method according to claim 1, is characterized in that, described lightening casting material is the fire-resistance rammed mass with heat-insulating property.
3. rotary kiln minor repair method according to claim 1, is characterized in that, described static natural Health preservation refers to natural Health preservation in the situation that rotary kiln do not rotate.
4. rotary kiln minor repair method according to claim 1, is characterized in that, described kiln liner castable is clay and high alumina castable, kiln hood 25m high alumina castable wherein, kiln tail 20m clay castable.
5. rotary kiln minor repair method according to claim 4, is characterized in that, Al in described high alumina castable
2o
3content is 48～90%, Al in clay castable
2o
3content is 30～48%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310548079.7A CN103629924A (en) | 2013-11-07 | 2013-11-07 | Minor repair method for rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310548079.7A CN103629924A (en) | 2013-11-07 | 2013-11-07 | Minor repair method for rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103629924A true CN103629924A (en) | 2014-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310548079.7A Pending CN103629924A (en) | 2013-11-07 | 2013-11-07 | Minor repair method for rotary kiln |
Country Status (1)
| Country | Link |
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| CN (1) | CN103629924A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07225086A (en) * | 1994-02-10 | 1995-08-22 | Tokyo Yogyo Co Ltd | Inner refractory working method of rotary kiln |
| CN101140139A (en) * | 2007-09-30 | 2008-03-12 | 中国铝业股份有限公司 | Rotary kiln staggered platform casting method |
| CN101708993A (en) * | 2008-10-31 | 2010-05-19 | 鞍钢集团矿业公司 | Repairing method of rotary kiln liner fireproof material |
| CN201672788U (en) * | 2010-06-13 | 2010-12-15 | 中冶长天国际工程有限责任公司 | Multi-pouring-strip rotary kiln |
| CN102853653A (en) * | 2011-06-30 | 2013-01-02 | 上海宝钢工业检测公司 | Stable kiln liner of asphalt rotary kiln |
| CN102997674A (en) * | 2012-12-27 | 2013-03-27 | 中冶长天国际工程有限责任公司 | Construction method for thermal insulation layer of rotary kiln liner |
-
2013
- 2013-11-07 CN CN201310548079.7A patent/CN103629924A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07225086A (en) * | 1994-02-10 | 1995-08-22 | Tokyo Yogyo Co Ltd | Inner refractory working method of rotary kiln |
| CN101140139A (en) * | 2007-09-30 | 2008-03-12 | 中国铝业股份有限公司 | Rotary kiln staggered platform casting method |
| CN101708993A (en) * | 2008-10-31 | 2010-05-19 | 鞍钢集团矿业公司 | Repairing method of rotary kiln liner fireproof material |
| CN201672788U (en) * | 2010-06-13 | 2010-12-15 | 中冶长天国际工程有限责任公司 | Multi-pouring-strip rotary kiln |
| CN102853653A (en) * | 2011-06-30 | 2013-01-02 | 上海宝钢工业检测公司 | Stable kiln liner of asphalt rotary kiln |
| CN102997674A (en) * | 2012-12-27 | 2013-03-27 | 中冶长天国际工程有限责任公司 | Construction method for thermal insulation layer of rotary kiln liner |
Non-Patent Citations (1)
| Title |
|---|
| 王洪宇: "《浇注料在炭素回转窑内衬施工中的应用及提高内衬使用寿命的途径》", 《轻金属》 * |
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| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140312 |