CN1051612C - Method for repairing ratry kiln - Google Patents
Method for repairing ratry kiln Download PDFInfo
- Publication number
- CN1051612C CN1051612C CN 96100705 CN96100705A CN1051612C CN 1051612 C CN1051612 C CN 1051612C CN 96100705 CN96100705 CN 96100705 CN 96100705 A CN96100705 A CN 96100705A CN 1051612 C CN1051612 C CN 1051612C
- Authority
- CN
- China
- Prior art keywords
- kiln
- repairing
- glue
- brick
- phosphoric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The present invention relates to a kiln repairing method of a rotary kiln, which is used for repairing the partial brick falling or the serious corrosion of a brick lining of the rotary kiln. The method comprises: a clean brick cross section is exposed by cleanly cleaning foreign matters in a position to be repaired, and plastic cloth or kraft paper is laid on a barrel body of the kiln; the brick cross section is coated with PA-80 glue, and PA-80 glue refractory concrete with added phosphoric acid or steel fiber reinforced concrete with added phosphoric acid is directly tamped. The kiln repairing method has the advantages of long life of the repaired kiln lining, short firing time, simple construction and easy operation. The method is especially suitable for the repairing of a brick lining with the impaired area smaller than 2<m>.
Description
The present invention is a kind of method for repairing ratry kiln, relates to rotary kiln bricking part and falls brick or the serious method for repairing and mending that corrodes.
Rotary kiln is that industries such as metallurgy, building materials are used for the high-temperature roasting equipment of products such as production metallurgy pelletizing, clinker, because of the kiln body constantly rotates, the alternation effect of kiln temperature in addition, brick lining uses and the part will occur after a period of time and fall brick and corrode serious phenomenon, the serious accident that will cause kiln cylinder body to be burnt as untimely processing.
Method for repairing and mending commonly used at present has two kinds.
Method one: be with after falling the peace and quiet dust in brick position, weldering anchoring hook on kiln cylinder body; Brick lining is corroded serious position should be removed corroding overweight brick earlier, weldering anchoring hook behind the peace and quiet dust.And then ramming and bricking are with the refractory concrete (being called for short the anchoring method) of material.
Method two: be according to the size of falling brick position (or serious attack sites) area,, build by laying bricks or stones again with this section bricking complete removal.
More than two kinds of methods all have following drawback: can occur constantly dropping with the refractory brick of concrete bonding when repairing kiln lining with method one, it is big more to mend the brick area more; When repairing kiln lining with method two, repairs long in time limit, refractory material waste big (refractory lining that can continue to use because of major part is removed), renewal expense is high and need the off-time of length.
For this reason, the present invention provides a kind of method for repairing ratry kiln, this method is by rotary kiln brick lining stressing conditions, according to the rotary kiln rotating speed slow or knot partially during circle brick lining and kiln cylinder body can produce this rule of relative motion and repair the kiln lining part and fall brick or corrode serious position.
The inventive method is the foreign material that rotary kiln is repaired the position are cleaned out and to be added after the appropriate materials PA-80 glue refractory concrete or the steel fibre refractory concrete that direct ramming adds phosphoric acid.
The detailed process of method for repairing ratry kiln of the present invention is as follows:
1. will repair the foreign material at position and remove, expose clean brick stubble, be beneficial to concrete and one is become in former bricking.
2. be positioned at kiln cylinder body upper berth Polypropylence Sheet or the brown paper of repairing the position, in case refractory concrete and kiln cylinder body bonding firmly are unfavorable between refractory concrete and kiln cylinder body relative motion taking place.
3. coat PA-80 glue at brick stubble place, to improve the adhesion strength of refractory concrete.
For area less than 0.5m
2The repairing position adopt direct ramming to add the PA-80 glue refractory concrete of phosphoric acid; For area greater than 0.5m
2The repairing position adopt ramming to add the PA-80 glue steel fibre refractory concrete of phosphoric acid.
(1) the PA-80 glue refractory concrete proportioning that adds phosphoric acid is (weight %):
Bauxites aggregate granularity 0～15mm, 50～60%;
The high-alumina powder clinker granularity is less than 0.088mm＞80%, 40～50%,
Outside above-mentioned bone meal material, add following compositions in addition:
Alumina cement 400
#More than 3～5%; PA-80 glue 20～25%;
Phosphoric acid concentration 40～45%, 5～7%.
(2) the PA-80 glue steel fibre refractory concrete proportioning that adds phosphoric acid is (weight %):
Bauxites aggregate granularity 0～15mm, 50～60%;
The high-alumina powder clinker granularity is less than 0.088mm＞80%, 40～50%
Outside above-mentioned bone, powder, add following compositions in addition:
Alumina cement 400
#More than 3～5%; PA-80 glue 20～25%;
Phosphoric acid concentration 40～45%, 5～7%;
Heat-resistant steel fiber φ 0.3～0.5mm * 25～35mm.3～4％。
The above-mentioned composition that adds is the percentage that accounts for bone, powder gross weight, and phosphoric acid should add in construction in preceding 24 hours, and ageing mixture adds PA-80 glue again after 8 hours carries out because of material.
5. the setting time under greater than 20 ℃ of environment of the bricking after repairing is: less than 0.5m
2The repairing area be 4 hours, greater than 0.5m
2The repairing area be 8 hours, baking is come into operation behind the kiln.
The concrete of said ratio is compared with simple PA-80 glue concrete has the strong characteristics of wearability, especially is fit to the repairing of phosphate matter bricking.
The method of repairing kiln lining of the present invention is the special benefit kiln method of implementing by the distinctive working law of rotary kiln liner, repairing kiln lining with the method can make concrete and original bricking be combined as a whole, and can with kiln cylinder body generation relative motion, so complement (promptly new repair the liner) life-span is long.
Chengde Iron ﹠ Steel Corp.'s drying grate--in the rotary kiln acid pellet production system, rotary kiln often falls brick, and the method for repairing and mending of employing is the anchoring method, and the average life span of complement is 130 hours, and the shortest is 18 hours; Adopted falling the brick position and directly poured into a mould PA-80 glue refractory concrete and make the average life span of complement bring up to 1752 hours, the short life of complement is 744 hours; Now mend kiln by method of the present invention, the life-span of complement is same as the life-span of this section bricking, builds by laying bricks or stones again until whole section bricking complete removal.Year economic benefit can reach more than 100,000 yuan.
Embodiment: PA-80 glue (weight %) the concrete proportioning table that adds phosphoric acid: composition specification refractory concrete steel fibre refractory concrete bauxites aggregate 0-15mm 53% 53% high-alumina powder clinkers are less than 0.088mm＞80% 47% 47% alumina cements 525
#5% (adding) 5% (adding) PA-80 glue, 23% (adding) 23% (adding) phosphoric acid concentration, 42.5% 6% (adding) 6% (adding) heat-resistant steel fiber φ 0.4 * 30mm 4% (adding)
Benefit kiln method of the present invention has the characteristics such as the life-span of kiln liner of repairing is long, stoving time is short, construction method is simple, easy operating, is particularly suitable for impaired area less than 2m2Bricking repair.
Claims (1)
1, clean brick stubble is removed, exposed to a kind of foreign material that rotary kiln is repaired the position, and the method for repairing ratry kiln that repair at brick or the serious position of corroding is fallen in rotary kiln bricking part, it is characterized in that:
(1) shop Polypropylence Sheet or brown paper between kiln cylinder body that is positioned at the repairing position and refractory concrete;
(2) coat PA-80 glue at brick stubble place;
(3) for less than 0.5m
2The repairing area adopt direct ramming to add the PA-80 glue refractory concrete of phosphoric acid, its proportioning is (weight %):
Bauxites aggregate granularity 0～15mm, 50～60%;
The high-alumina powder clinker granularity is less than 0.088mm＞80%, 40～50%;
Outside above-mentioned aggregate powder, add following composition in addition:
Alumina cement 400# above 3～5%; PA-80 glue 20～25%;
Phosphoric acid concentration is 40～45% 5～7%;
(4) for greater than 0.5m
2Repairing and the long-pending PA-80 glue steel fibre refractory concrete that adopts direct ramming to add phosphoric acid, its proportioning is (weight %):
Bauxites aggregate granularity 0～15mm, 50～60%;
The high-alumina powder clinker granularity is less than 0.088mm＞80%, 40～50%;
Outside above-mentioned aggregate powder, add following composition in addition:
Alumina cement 400# above 3～5%; PA-80 glue 20～50%;
Phosphoric acid concentration is 40～45% 5～7%;
Heat-resistant steel fiber φ 0.3～0.5mm * 25～35mm 3～4%;
(3), the composition that adds in (4) is the percentage that accounts for bone, powder gross weight, phosphoric acid added in construction in preceding 24 hours, ageing mixture adds PA-80 glue again and carries out ageing mixture after 8 hours;
(5) repair the back bricking and solidify under greater than 20 ℃ of environment, the time is: less than 0.5m
2The repairing area be 4 hours; Greater than 0.5m
2The repairing area be 8 hours, dry by the fire kiln then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96100705 CN1051612C (en) | 1996-01-26 | 1996-01-26 | Method for repairing ratry kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96100705 CN1051612C (en) | 1996-01-26 | 1996-01-26 | Method for repairing ratry kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1141423A CN1141423A (en) | 1997-01-29 |
| CN1051612C true CN1051612C (en) | 2000-04-19 |
Family
ID=5116679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96100705 Expired - Fee Related CN1051612C (en) | 1996-01-26 | 1996-01-26 | Method for repairing ratry kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051612C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708993B (en) * | 2008-10-31 | 2012-05-23 | 鞍钢集团矿业公司 | Repairing method of rotary kiln liner fireproof material |
| CN103512361B (en) * | 2013-09-13 | 2015-07-08 | 楚雄滇中有色金属有限责任公司 | Furnace brick patching method of oxygen enrichment top-blown copper metallurgical furnace |
| CN103940239B (en) * | 2014-04-15 | 2015-12-02 | 莱芜钢铁集团有限公司 | Applied to pelletizing rotary kiln refractory material method for repairing and mending |
| CN107266095A (en) * | 2017-07-21 | 2017-10-20 | 湖南众鑫新材料科技股份有限公司 | A kind of smelted furnace cinder is reused in the method that stove is built by laying bricks or stones |
| CN111995408B (en) * | 2020-08-18 | 2022-07-05 | 武汉钢铁集团耐火材料有限责任公司 | Repairing material and repairing method for working layer at bottom of molten iron tank |
-
1996
- 1996-01-26 CN CN 96100705 patent/CN1051612C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1141423A (en) | 1997-01-29 |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |