CN103353231B - Ceaseless furnace repair method of stationary type metallurgical furnace arch - Google Patents

Ceaseless furnace repair method of stationary type metallurgical furnace arch Download PDF

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Publication number
CN103353231B
CN103353231B CN201310267019.8A CN201310267019A CN103353231B CN 103353231 B CN103353231 B CN 103353231B CN 201310267019 A CN201310267019 A CN 201310267019A CN 103353231 B CN103353231 B CN 103353231B
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China
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arch
furnace
steel plate
chimney arch
holder
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CN201310267019.8A
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CN103353231A (en
Inventor
于照阳
吴世洋
王兴峰
朱来东
白继春
马普利
刘香英
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Northwest Research Institute of Mining and Metallurgy
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Northwest Research Institute of Mining and Metallurgy
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Abstract

The invention discloses a ceaseless furnace repair method of a stationary type metallurgical furnace arch. The method comprises the steps as follows: a springboard is constructed in a column pull rod position of a burnt furnace arch, and a combustor of a furnace end is closed; according to the burning degree and position of the burnt furnace arch, the furnace arch area and the furnace arch radian required to be repaired are determined; according to the furnace arch area and the furnace arch radian required to be repaired, an arch supporting steel plate is made of a steel plate; the arch supporting steel plate is transported to the upper part of the furnace arch and laid along the inner side of the lower part of the burnt furnace arch; masonry operation is performed on the constructed springboard; the springboard is dismantled; the combustor of the furnace end is opened, and the repair of the furnace arch is finished. According to the ceaseless furnace repair method of the stationary type metallurgical furnace arch, under the condition that a metallurgical furnace is not stopped, the furnace arch can be repaired, the repair time is short, the method is simple, and the service life of the metallurgical furnace can be prolonged.

Description

The not blowing out method for repairing and mending of fixed metallurgical furnace chimney arch
Technical field
The present invention relates to a kind of method for repairing and mending of metallurgical furnace chimney arch, particularly relate to a kind of not blowing out method for repairing and mending of fixed metallurgical furnace chimney arch.
Background technology
Fixed metallurgical furnace is made up of furnace bottom, burner furnace wall, stove tail furnace wall, both sides furnace wall and chimney arch, and chimney arch is domes, and furnace bottom is antiarch shape, burner furnace wall and stove tail furnace wall are planar structure, body of heater surrounding has column, and column is connected by pull bar, for metallurgical furnace plays the effect of support.
Building by laying bricks or stones of furnace bottom and furnace wall is first carried out in building by laying bricks or stones of metallurgical furnace, after furnace bottom and furnace brickwork complete, built is carried out with batten in metallurgical furnace, form the arch of furnace roof on top after, carry out brickwork again, build after brick operation completes, after fastening for the pull bar in column until chimney arch, batten built in stove is removed, so just completes building by laying bricks or stones of metallurgical furnace.In the firing up process of metallurgical furnace, according to the degrees of expansion of chimney arch, the pull bar between column to be carried out the loose pull bar operation of compartment, to keep the chimney arch of metallurgical furnace can be held in arch to a certain degree, keep its uniform force.As can be seen from the chimney arch building process of metallurgical furnace, for building by laying bricks or stones of metallurgical furnace chimney arch, be after batten built is first carried out in chimney arch bottom, then must carry out building by laying bricks or stones of chimney arch, that is quality of chimney arch masonry quality, directly affects the furnace li` of metallurgical furnace.
Fixed metallurgical furnace adopts fine coal or heavy oil to be fuel, and burner is located on burner furnace wall or the chimney arch of close burner.Burner with certain angle to jet flames in metallurgical furnace, for metallurgical furnace provides heat energy, for the material in metallurgical furnace carries out being incubated or melting material.Angle as furnace head burner installs improper or other reason, and the flame that burner ejects shift phenomenon can occur, and the particle in fine coal or flame will wash away furnace wall or chimney arch, makes furnace wall or chimney arch thinning gradually, even grills thoroughly.As repaired scaling loss position not in time, until furnace wall or chimney arch scaling loss serious time, directly can affect the furnace li` of metallurgical furnace.
When furnace wall is as serious in scaling loss, carry out that repairing is relatively good to be carried out, first close the flame of burner, make burner no longer jet flames; Device to be combusted no longer jet flames time, furnace wall serious for scaling loss is removed, builds workman by laying bricks or stones and build by laying bricks or stones with the position of refractory brick by scaling loss, after having built by laying bricks or stones, the last burner opening burner again, makes it continue jet flames, and such metallurgical furnace can proceed again to produce.
Fixed metallurgical furnace, in the process run, due to gas stream in the stove skewness, causes chimney arch local scour thinning, can grill thoroughly by chimney arch, thus cause chimney arch to cave in, and then affect furnace li` time serious.According to the building method of chimney arch, when generally chimney arch is as serious in scaling loss, cannot repair it, the furnace charge in metallurgical furnace can only be carried out emptying, carry out the shutdown maintenance operation of metallurgical furnace.
Summary of the invention
The object of the present invention is to provide a kind of metallurgical furnace to repair chimney arch when not blowing out, the time of repairing is short, and method is simple, can extend the not blowing out method for repairing and mending of the fixed metallurgical furnace chimney arch of metallurgical furnace shelf life.
For achieving the above object, the technical scheme that the present invention takes is:
A not blowing out method for repairing and mending for fixed metallurgical furnace chimney arch, comprises the following steps:
A. springboard is built at the column pull bar place of scaling loss chimney arch;
B. the burner of burner is closed;
C. according to scaling loss degree and the position of scaling loss chimney arch, the chimney arch area and the chimney arch radian that need repairing is determined;
D. the chimney arch area repaired as required and chimney arch radian, make holder arch steel plate with steel plate;
E. holder arch steel plate is transported to the top of chimney arch, holder arch steel plate is laid along the lower inside of scaling loss chimney arch;
F. carry out building operation by laying bricks or stones on the springboard built;
G. springboard is removed;
H. open the burner of burner, chimney arch is repaired complete.
The arch of holder described in steps d steel plate is more than 1 piece or 2 pieces.
The arch of holder described in step e steel plate is fixedly connected with one end that steel plate reinforcing bar is encircleed in holder, and the other end of described holder arch steel plate reinforcing bar is fixedly connected with roofstay.
Every limit 20 ~ 40cm wider than described scaling loss chimney arch of described holder arch steel plate, large 3 ~ 5 ° of the radian of the camber ratio scaling loss chimney arch of described holder arch steel plate.
Adopt the not blowing out method for repairing and mending of fixed metallurgical furnace chimney arch provided by the invention, metallurgical furnace, when not blowing out, can be repaired chimney arch, and the time of repairing is short, and method is simple, can extend the service life of metallurgical furnace.
Accompanying drawing explanation
Fig. 1 is that fixed metallurgical furnace chimney arch repairs schematic diagram.
In figure, 1-furnace bottom, 2-furnace wall, 3-side wall column, 4-chimney arch, 5-holder arch steel plate, 6-scaling loss chimney arch, 7-holder arch steel plate reinforcing bar, 8-column pull bar screw, 9-roofstay.
Detailed description of the invention
Below in conjunction with specific embodiment and accompanying drawing thereof, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As described in Figure 1, fixed metallurgical furnace comprises furnace bottom 1, furnace wall 2 and chimney arch 4, and the surrounding of furnace wall 2 is provided with side wall column 3, and above chimney arch 4, the top of two relative side wall columns 3, is fixedly connected with roofstay 9 with column pull bar screw 8.
The not blowing out method for repairing and mending of fixed metallurgical furnace chimney arch provided by the invention, comprises the following steps:
1. build springboard at the column pull bar place of scaling loss chimney arch 6.The principle of building of springboard is centered by scaling loss chimney arch 6, and build along surrounding, centre is vacated, and the large I that surrounding is built supplies 3 people at top-operation.The reason of first building springboard is build springboard overlong time on the one hand, as first closed the burner of burner, in-furnace temperature can be caused to decline too low, and cause intensification slow, affect output; Reason is on the other hand the scope that the degree of chimney arch scaling loss and its heat radiation can be born at human body the impact of operating personnel.
2. close the burner of burner.
3. chimney arch 6 serious for scaling loss is smash with drill rod, according to scaling loss degree and the position of scaling loss chimney arch 6, determine the chimney arch area and the chimney arch radian that need repairing.
4. the chimney arch area repaired as required and chimney arch radian, make holder arch steel plate 5 with steel plate, and holder arch steel plate 5 can be 1 piece, also can be 2 pieces, even more.Every limit of holder arch steel plate 5, than every hem width 25cm of scaling loss chimney arch 6, asks the radian of arch steel plate 5 to be greater than the radian 4 ° of scaling loss chimney arch 6.
5. holder arch steel plate 5 is transported to the top of chimney arch 4, the lower inside of holder arch steel plate 5 along scaling loss chimney arch 6 laid, holder arch steel plate 5 welds with one end that steel plate reinforcing bar 7 is encircleed in holder, and the other end of holder arch steel plate reinforcing bar 7 welds with roofstay 9.
6., after holder arch steel plate 5 fixes, build workman by laying bricks or stones and carry out building operation by laying bricks or stones on the springboard built.
7. build by laying bricks or stones after operation, remove springboard.After building by laying bricks or stones, the principle due to thermal expansion and arch makes to build part by laying bricks or stones and supports with former chimney arch part, forms a complete arcuate structure.
8. open furnace head burner, chimney arch is repaired complete.

Claims (2)

1. a not blowing out method for repairing and mending for fixed metallurgical furnace chimney arch, is characterized in that, comprise the following steps:
A. springboard is built at the column pull bar place of scaling loss chimney arch (6);
B. the burner of burner is closed;
C. according to scaling loss degree and the position of scaling loss chimney arch (6), the chimney arch area and the chimney arch radian that need repairing is determined;
D. the chimney arch area repaired as required and chimney arch radian, make holder arch steel plate (5) with steel plate; Described holder arch steel plate (5) is more than 1 piece or 2 pieces;
E. holder arch steel plate (5) is transported to the top of chimney arch (4), holder arch steel plate (5) is laid along the lower inside of scaling loss chimney arch (6); One end that steel plate reinforcing bar (7) is encircleed in described holder arch steel plate (5) and holder is fixedly connected with, and the other end of described holder arch steel plate reinforcing bar (7) is fixedly connected with roofstay (9);
F. carry out building operation by laying bricks or stones on the springboard built;
G. springboard is removed;
H. open the burner of burner, chimney arch is repaired complete.
2. the not blowing out method for repairing and mending of fixed metallurgical furnace chimney arch according to claim 1, it is characterized in that, every limit 20 ~ 40cm wider than described scaling loss chimney arch (6) of holder arch steel plate (5) described in step e, large 3 ~ 5 ° of the radian of the camber ratio scaling loss chimney arch (6) of described holder arch steel plate (5).
CN201310267019.8A 2013-06-29 2013-06-29 Ceaseless furnace repair method of stationary type metallurgical furnace arch Active CN103353231B (en)

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CN103353231B true CN103353231B (en) 2015-05-27

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1120618A2 (en) * 2000-01-25 2001-08-01 Technological Resources Pty. Ltd. A method of relining a vessel
CN201032385Y (en) * 2007-04-10 2008-03-05 上海宝钢设备检修有限公司 Heat insulation channel for thermal state maintenance of annular furnace lining fireproof material
CN101162126A (en) * 2007-11-27 2008-04-16 攀枝花新钢钒股份有限公司 Kiln and furnace wall covering thermal-state rapid repairing method and special equipment thereof
CN102032788A (en) * 2010-12-13 2011-04-27 山西太钢不锈钢股份有限公司 Furnace top repairing method for heating furnace
CN102147192A (en) * 2011-03-21 2011-08-10 金隆铜业有限公司 Overhaul method for semi-hot state of flash smelting furnace
CN102564135A (en) * 2012-02-13 2012-07-11 中国十九冶集团有限公司 Construction method for patching of refractory materials of furnace top of heating furnace

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528909A (en) * 1975-07-11 1977-01-24 Kawasaki Steel Corp Method of building dome type roof bricks
JPS61130410A (en) * 1984-11-30 1986-06-18 Nippon Steel Corp Method for repairing blast furnace interior
JPH08334289A (en) * 1995-06-07 1996-12-17 Sumitomo Metal Ind Ltd Method for removing skull and the like in refractory repairing, and its burner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1120618A2 (en) * 2000-01-25 2001-08-01 Technological Resources Pty. Ltd. A method of relining a vessel
CN201032385Y (en) * 2007-04-10 2008-03-05 上海宝钢设备检修有限公司 Heat insulation channel for thermal state maintenance of annular furnace lining fireproof material
CN101162126A (en) * 2007-11-27 2008-04-16 攀枝花新钢钒股份有限公司 Kiln and furnace wall covering thermal-state rapid repairing method and special equipment thereof
CN102032788A (en) * 2010-12-13 2011-04-27 山西太钢不锈钢股份有限公司 Furnace top repairing method for heating furnace
CN102147192A (en) * 2011-03-21 2011-08-10 金隆铜业有限公司 Overhaul method for semi-hot state of flash smelting furnace
CN102564135A (en) * 2012-02-13 2012-07-11 中国十九冶集团有限公司 Construction method for patching of refractory materials of furnace top of heating furnace

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