CN108870956B - Method for replacing damaged material raising block in rotary kiln - Google Patents
Method for replacing damaged material raising block in rotary kiln Download PDFInfo
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- CN108870956B CN108870956B CN201810477988.9A CN201810477988A CN108870956B CN 108870956 B CN108870956 B CN 108870956B CN 201810477988 A CN201810477988 A CN 201810477988A CN 108870956 B CN108870956 B CN 108870956B
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- lifting blocks
- block
- kiln
- material lifting
- damaged
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to a method for replacing a damaged material raising block in a rotary kiln, which comprises the following steps: selecting complete and firm material lifting blocks to perform side surface grooving, buckling the material lifting blocks by using a bow-shaped frame to perform welding, rotating a kiln body, placing the frame, removing the damaged material lifting blocks at the upper semicircle of the kiln body, removing the material lifting blocks at the upper semicircle, taking out the frame, continuously removing clay bricks and the damaged material lifting blocks at the lower semicircle, polishing, welding and installing the intact material lifting blocks of the kiln body and pouring after the removal is finished. According to the method for replacing the damaged material lifting blocks in the rotary kiln, only the material lifting blocks at the damaged parts are replaced, and the side surface grooves and the arched frame are combined for supporting and reinforcing in the replacement process, so that other material lifting blocks are prevented from falling off in the dismantling process; in addition, the replacement method is feasible, the safety measures are stable and appropriate, the material consumption is reduced, the construction period is shortened, and the construction cost is greatly reduced.
Description
Technical Field
The invention relates to a method for replacing a damaged hoisting block in a rotary kiln, in particular to a method for replacing a damaged hoisting block in a rotary kiln with the diameter of more than 4 meters.
Background
The 60-degree material raising block at the kiln tail of the rotary kiln is an important component of 1000 ton/day active lime refractory, and the main function of the material raising block is to utilize the high-temperature part of the kiln tail to naturally raise limestone along with the rotation of the rotary kiln and uniformly heat the limestone in the process of rotating the calcining zone of the rotary kiln, so that high-quality stone is calcined.
In the building process of the 60-degree material raising blocks at the kiln tail, the material raising blocks are welded on a rotary kiln cylinder body and are sleeved one by one, and the material raising blocks are welded to the kiln tail from the middle of the kiln for 6 times in total. Along with the time lapse, large batch production, the material lifting block in the kiln body has appeared the phenomenon of distortion, and the whole fracture of distortion material lifting block bottom welding department. Therefore, the broken material lifting blocks need to be overhauled and replaced. According to the conventional maintenance method, the material raising blocks are required to be completely replaced from the beginning, and the method is safe and reliable, but has huge material consumption and longer construction period.
Disclosure of Invention
The invention aims to provide a method for replacing damaged material raising blocks in a rotary kiln, and aims to overcome the defects that material consumption is huge and the construction period is long due to the fact that all the material raising blocks need to be replaced in the conventional replacement and maintenance method.
In order to achieve the purpose of the invention, the technical scheme is as follows:
a method for replacing a damaged material raising block in a rotary kiln comprises the following steps:
s1, respectively selecting complete and firm lifting blocks on each lifting block along the circumferential direction of the rotary kiln, wherein the standard of the lifting blocks is as follows: selecting at least more than 2 complete and firm lifting blocks which are arranged in the front of the position, where the lifting block is to be removed in advance, of the kiln head direction of the rotary kiln and are positioned on each lifting block, selecting at least more than 3 complete and firm lifting blocks which are arranged in the rear of the position, where the lifting block is to be removed in advance, of the kiln tail direction of the rotary kiln and performing side surface grooving on clay bricks on two sides of the selected complete and firm lifting blocks;
s2, buckling a pre-prepared bow-shaped frame on the material raising block at the positions of the grooves on the two sides of the material raising block selected in the step S1, and welding the material raising block on the kiln cylinder to tightly connect the kiln cylinder and the bow-shaped frame, wherein a welding opening is tight and firm and is fully welded;
s3, after the welding reinforcement in the step S2, rotating the rotary kiln to the top, placing a movable frame in the kiln body, and removing the damaged material lifting blocks at the upper semicircle of the kiln body, wherein in the removing process, clay bricks at the position of the damaged material lifting blocks are removed firstly, and then the damaged material lifting blocks are removed;
s4, after the upper semicircle material lifting block in the step S3 is removed, taking out the scaffold, and continuously removing the clay bricks and the damaged material lifting block at the lower semicircle;
and S5, after the dismantling in the step S4 is finished, polishing and welding the kiln cylinder, installing a complete material raising block and pouring.
Further, the welding height of the crater in the step S2 is 10 mm, and the welding width is 140 mm.
Further, the movable scaffold placed in the step S3 ensures stable and firm erection.
Preferably, a set of side grooves is formed on the clay bricks on both sides of the complete strong lifting block selected in step S1.
Preferably, in the step S2, a group of the brackets are buckled on the material lifting block for welding.
The invention has the beneficial effects that: according to the method for replacing the damaged material lifting blocks in the rotary kiln, only the material lifting blocks at the damaged parts are replaced, and the side surface grooves and the arched frame are combined for supporting and reinforcing in the replacement process, so that other material lifting blocks are prevented from falling off in the dismantling process; in addition, the replacement method is feasible, the safety measures are stable and appropriate, the material consumption is reduced, the construction period is shortened, and the construction cost is greatly reduced.
Detailed Description
A method for replacing a damaged material raising block in a rotary kiln comprises the following steps:
s1, respectively selecting complete and firm lifting blocks on each lifting block along the circumferential direction of the rotary kiln, wherein the standard of the lifting blocks is as follows: selecting at least more than 2 complete and firm lifting blocks which are arranged in the front of the position, where the lifting block is to be removed in advance, of each lifting block in the direction of the kiln head of the rotary kiln, selecting at least more than 3 complete and firm lifting blocks which are arranged in the rear of the position, where the lifting block is to be removed in advance, of each lifting block in the direction of the kiln tail of the rotary kiln, and performing side surface grooving on clay bricks on two sides of the selected complete and firm lifting blocks.
It should be noted that: when a damaged material throwing block exists on one material throwing block, the corresponding material throwing blocks at other parts along the circumferential direction of the cylinder body also need to be replaced.
And S2, buckling a pre-prepared bow-shaped frame on the material lifting block at the positions of the grooves on the two sides of the material lifting block selected in the step S1, and welding the material lifting block on the kiln cylinder to tightly connect the kiln cylinder and the bow-shaped frame, wherein the welding opening is tight and firm and is fully welded. The welding height of the crater is 10 mm, and the welding width is 140 mm. The bow used here is a 14-wide channel steel, and the load weight is 10 tons.
S3, after the welding reinforcement in the step S2, rotating the rotary kiln to the top, placing a movable frame in the kiln body, removing the damaged material lifting blocks at the upper semicircle of the kiln body, and removing clay bricks at the position of the damaged material lifting blocks firstly and then removing the damaged material lifting blocks when the other material lifting blocks except the removal area are not dropped in the removing process; the movable building frame is arranged to ensure stable and firm building.
And S4, taking out the scaffold after the upper semicircle material lifting block in the step S3 is removed, and continuously removing the clay bricks and the damaged material lifting block at the lower semicircle.
And S5, after the dismantling in the step S4 is finished, polishing and welding the kiln cylinder, installing a complete material raising block and pouring.
In order to further prevent the material lifting block from falling off accidentally and injuring operators by falling, a group of side grooves are formed in clay bricks on two sides of the complete and firm material lifting block selected in the step S1, and a group of bow-shaped frames are buckled on the material lifting block for welding.
According to the method for replacing the damaged material lifting blocks in the rotary kiln, only the material lifting blocks at the damaged parts are replaced, and the side surface grooves and the arched frame are combined for supporting and reinforcing in the replacement process, so that other material lifting blocks are prevented from falling off in the dismantling process; in addition, the replacement method is feasible, the safety measures are stable and appropriate, the material consumption is reduced, the construction period is shortened, and the construction cost is greatly reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for replacing a damaged material raising block in a rotary kiln is characterized by comprising the following steps:
s1, respectively selecting complete and firm lifting blocks on each lifting block along the circumferential direction of the rotary kiln, wherein the standard of the lifting blocks is as follows: selecting at least more than 2 complete and firm lifting blocks which are arranged in the front of the position, where the lifting block is to be removed in advance, of the kiln head direction of the rotary kiln and are positioned on each lifting block, selecting at least more than 3 complete and firm lifting blocks which are arranged in the rear of the position, where the lifting block is to be removed in advance, of the kiln tail direction of the rotary kiln and performing side surface grooving on clay bricks on two sides of the selected complete and firm lifting blocks;
s2, buckling a pre-prepared bow-shaped frame on the material raising block at the positions of the grooves on the two sides of the material raising block selected in the step S1, and welding the material raising block on the kiln cylinder to tightly connect the kiln cylinder and the bow-shaped frame, wherein a welding opening is tight and firm and is fully welded;
s3, after the welding reinforcement in the step S2, rotating the rotary kiln to the top, placing a movable frame in the kiln body, and removing the damaged material lifting blocks at the upper semicircle of the kiln body, wherein in the removing process, clay bricks at the position of the damaged material lifting blocks are removed firstly, and then the damaged material lifting blocks are removed;
s4, after the upper semicircle material lifting block in the step S3 is removed, taking out the scaffold, and continuously removing the clay bricks and the damaged material lifting block at the lower semicircle;
and S5, after the dismantling in the step S4 is finished, polishing and welding the kiln cylinder, installing a complete material raising block and pouring.
2. The method for replacing a damaged fugitive block in a rotary kiln as claimed in claim 1, wherein the welded junction in the step S2 has a welding height of 10 mm and a welding width of 140 mm.
3. The method as claimed in claim 1, wherein the moving scaffold placed in step S3 ensures a stable and firm erection.
4. The method as claimed in any one of claims 1 to 3, wherein a set of side grooves is formed on the clay bricks on both sides of the complete strong lifting block selected in step S1.
5. The method as claimed in claim 4, wherein a set of brackets are fastened to the lifter block for welding in step S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477988.9A CN108870956B (en) | 2018-05-18 | 2018-05-18 | Method for replacing damaged material raising block in rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477988.9A CN108870956B (en) | 2018-05-18 | 2018-05-18 | Method for replacing damaged material raising block in rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108870956A CN108870956A (en) | 2018-11-23 |
| CN108870956B true CN108870956B (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810477988.9A Active CN108870956B (en) | 2018-05-18 | 2018-05-18 | Method for replacing damaged material raising block in rotary kiln |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100570258C (en) * | 2007-09-29 | 2009-12-16 | 中冶焦耐工程技术有限公司 | Rotary kiln inside lining refractory materials injecting brick |
| CN103388981B (en) * | 2013-07-18 | 2015-05-27 | 鞍钢集团耐火材料公司 | Rotary kiln lifter brick and replacing and laying method thereof |
| CN204369943U (en) * | 2015-01-05 | 2015-06-03 | 河北同业冶金科技有限责任公司 | Wear-resistant type inlays liner plate |
| CN104792155B (en) * | 2015-04-27 | 2016-08-24 | 云南源鑫炭素有限公司 | Rotary kiln mixed type refractory lining installation method |
| CN204981543U (en) * | 2015-07-21 | 2016-01-20 | 惠州Tcl环境科技有限公司 | Drying equipment of efficient handling heterogeneity heavy metal mud |
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- 2018-05-18 CN CN201810477988.9A patent/CN108870956B/en active Active
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| CN108870956A (en) | 2018-11-23 |
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Effective date of registration: 20210112 Address after: 045199 Maipo village, Xiyan Town, Yu County, Yangquan City, Shanxi Province Applicant after: SHANXI TAIGANG XINLEI RESOURCE Co.,Ltd. Address before: Maipo village, Xiyan Town, Yu County, Yangquan City, Shanxi Province (TISCO Xinlei company) Applicant before: Guo Junjie |
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