CN103350221B - Method for maintaining and building 320-ton torpedo ladle cone working layer - Google Patents
Method for maintaining and building 320-ton torpedo ladle cone working layer Download PDFInfo
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- CN103350221B CN103350221B CN201310313090.5A CN201310313090A CN103350221B CN 103350221 B CN103350221 B CN 103350221B CN 201310313090 A CN201310313090 A CN 201310313090A CN 103350221 B CN103350221 B CN 103350221B
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Abstract
A method for maintaining and building a 320-ton torpedo ladle cone working layer includes the steps of (1) cleaning the working layer and making the thickness of the left working layer not less than 80mm, (2) leveling the working layer in a painting mode after water is added into carborundum fire clay, (3) naturally drying the leveled working layer, (4) building a refractory brick layer in a conventional mode, wherein refractory bricks are identical in structure and different in size, and first special-shaped bricks, second special-shaped bricks and third special-shaped bricks are matched with one another for building of the refractory brick layer, (5) closely smearing a combination portion of the front end and a tail portion wall of a torpedo ladle with refractory castable, and roasting and preserving temperature according to phases. According to the method, safety operation of the torpedo ladle is guaranteed, the torpedo ladle can serve for 1350 times in an original process that only etched refractory materials are demolished, a maintenance working period can be shortened by at least 50%, maintenance work load is obviously reduced, the refractory materials used in maintenance is saved at least 40%, and maintenance cost is greatly reduced.
Description
Technical field
The present invention relates to the building method of fish torpedo ladle, belong to a kind of maintenance building method of 320 tons of fish torpedo ladle cone process layers particularly.
Background technology
Fish torpedo ladle is that steel-making is for splendid attire and the common instrument transporting molten iron.Its inner lining refractory divides permanent layer and working lining, and working lining in use can corrode gradually, and permeates in brick due to slag, makes reaction in brick produce metamorphic layer.Brick layer property-deterioration causes structural layering pull out type fracture, and this situation seems particularly serious at fish torpedo ladle both sides slag line and bottom.In order to ensure the safe operation of fish torpedo ladle, just must repair the weak part that deteriorates.The method taked at present uses laying fireproof bricks again after removing the working lining refractory brick at position of deteriorating, and namely so-called " in repair " (only removing by the refractory material that deteriorates), is commonly referred to " mending by replacing a damaged part ", needs to consume a large amount of refractory materials.Statistics shows, mends by replacing a damaged part, consume nearly 35 tons of refractory material, and maintenance difficulty is large if a fish torpedo ladle changes cone position, two ends, long in time limit, need 12 working days, calculated by 8 hours every workdays, need 96 hours altogether, and unsafe factor is many, also affects the use turnover rate of fish torpedo ladle.
Summary of the invention
The invention reside in the drawback solving and exist in the maintenance of current fish torpedo ladle cone process layer refractory brick: the deficiencies such as quantities is large, long in time limit, refractory consumption is large, there is provided a kind of ensure safe operation and keep former in repair the prerequisite in technique 1350 times tank age under, the shortening maintenance duration is all not less than 50%, maintenance workload significantly reduces, save refractory material consumption at least 40% the maintenance building method of 320 tons of fish torpedo ladle cone process layers.
Realize the measure of above-mentioned purpose:
A maintenance building method for 320 tons of fish torpedo ladle cone process layers, its step:
1) when its fish torpedo ladle need overhaul, first working lining is cleared up, and the residual thickness retaining working lining is not less than 80mm;
2) after adopting aluminium silicon carbide chamotte to add water, working lining is coated with flat;
3) natural drying is carried out to the flat working lining of painting, be not less than 24 hours drying time;
4) build fire brick layer by laying bricks or stones in a conventional manner, refractory brick adopts structure identical, and size has different abnormal shape one, abnormal shape two and special-shaped three is carried out cooperation and built by laying bricks or stones; Every ring is built by laying bricks or stones and is adopted neck brick to close door to centre; Build by laying bricks or stones and all adopt wet block, mud plumpness is not less than 95%, and brickwork joint is no more than 2 ㎜, and ring distortion is no more than 8 ㎜;
5) build by laying bricks or stones and terminate and after removing all supports, smear to tight by castable to the front end of fish torpedo ladle and afterbody wall junction;
6) carry out toasting and being incubated according to the stage:
Carry out first stage baking and insulation: be evenly warming up to by room temperature and be no more than 310 DEG C, the heat time is not less than 20 hours, and be not less than 6 hours being no more than under 310 DEG C of conditions insulation;
Carry out second stage baking and insulation: be evenly warming up to be no more than 610 DEG C by being no more than 310 DEG C, the heat time is not less than 15 hours, and be not less than 2 hours being no more than insulation under 610 DEG C of conditions;
Carry out phase III baking and insulation: be evenly warming up to be no more than 1000 DEG C by being no more than 610 DEG C, the heat time is not less than 13 hours, and be not less than 4 hours being no more than insulation under 1000 DEG C of conditions;
Carry out fourth stage baking and insulation: by being no more than 1000 DEG C of uniform decrease in temperature to being not less than 950 DEG C, the heat time is not less than 2 hours, and be not less than 2 hours being not less than under 950 DEG C of conditions insulation; Stand-by.
Further: the physical and chemical index requirement of described aluminium silicon carbide chamotte is: Al
2o
3weight percent content is not less than 65%, SiC weight percent content is not less than 15%, 110 DEG C of anti-folded knotting strengths of * 24h cold conditions are not less than 0.8MPa, granularmetric composition: be not less than accounting for of 0.5mm and be no more than 2%, ≤ 0.074mm accounts for and is not less than 50%, and all the other are that granularity is being greater than 0.074mm to the occupancy volume be less than between 0.5mm.
Further: the specification of described special form brick one, special form brick two and special form brick three:
Special form brick one: a length of side is 144mm, the b length of side be 144mm, the c length of side be 150mm, the d length of side be 150mm, the e length of side be 120mm, h limit height is 300mm;
Special form brick two: a ' length of side is 142mm, b ' length of side be 138mm, c ' length of side be 150mm, d ' length of side be 146mm, e ' length of side be 120mm, h ' limit height is 300mm;
The length of side is 138mm, c to special form brick three: a " length of side is 140mm, b " " length of side is 150mm, d " that the length of side is 148mm, e " length of side is 120mm, h " that limit height is 300mm.
Further: described aluminium silicon carbide chamotte is 100:26 with the ratio of water, and stirs.
The present invention compared with prior art, safe operation can not only be ensured and keep former in repair tank age of technique 1350 times, can also shorten the maintenance duration is all not less than 50%, and maintenance workload significantly reduces, save refractory material consumption at least 40%, cause the cost of overhaul greatly to reduce.
Accompanying drawing explanation
Fig. 1 is the structural representation of special form brick one of the present invention;
Fig. 2 is the structural representation of special form brick two of the present invention;
Fig. 3 is the structural representation of special form brick three of the present invention.
Detailed description of the invention
Below the present invention is described in detail:
The size of abnormal shape one, abnormal shape two and abnormal shape three that following embodiment is used is in table 1; The physical and chemical index part table 2 of aluminium silicon carbide chamotte used.
Embodiment 1
Carry out maintenance to 320 tons of fish torpedo ladle cone process layers to build by laying bricks or stones, it carries out according to following steps:
1) when its fish torpedo ladle need overhaul, first working lining is cleaned out, and the residual thickness retaining working lining is at 80mm;
2) after adopting aluminium silicon carbide chamotte to add water, working lining is coated with flat; Aluminium silicon carbide chamotte is 100:26 with the ratio of water;
3) natural drying is carried out, 24 hours drying times to the flat working lining of painting;
4) build fire brick layer by laying bricks or stones in a conventional manner, refractory brick adopts structure identical, and size has different abnormal shape one, abnormal shape two and special-shaped three is carried out cooperation and built by laying bricks or stones, listed by part table 1; Every ring is built by laying bricks or stones and is adopted neck brick to close door to centre; Build by laying bricks or stones and all adopt wet block, mud plumpness is 96%, and brickwork joint is no more than 2 ㎜ and ring distortion is no more than 8 ㎜;
5) build by laying bricks or stones and terminate and after removing all supports, smear to tight by castable to the front end of fish torpedo ladle and afterbody wall junction;
6) carry out toasting and being incubated according to the stage:
Carry out first stage baking and insulation: be evenly warming up to 290 DEG C by room temperature, the heat time at 21 hours, and is incubated 6.5 hours under 290 DEG C of conditions;
Carry out second stage baking and insulation: be evenly warming up to 600 DEG C by 290 DEG C, the heat time is 15 hours, and is incubated 2.5 hours under 600 DEG C of conditions;
Carry out phase III baking and insulation: be evenly warming up to 995 DEG C by 600 DEG C, the heat time is 13 hours, and is incubated 5 hours under 995 DEG C of conditions;
Carry out fourth stage baking and insulation: by 995 DEG C of uniform decrease in temperature to 960 DEG C, the heat time is 2 hours, and is incubated 3 hours under 960 DEG C of conditions; Stand-by.
Through statistics, this repair time shares 47 hours, and shortened for 51% duration than original, refractory material use amount is 19 tons, reduces 45.7% than original use amount, and tank reaches 1355 times age.
Embodiment 2
Carry out maintenance to 320 tons of fish torpedo ladle cone process layers to build by laying bricks or stones, it carries out according to following steps:
1) when its fish torpedo ladle need overhaul, first working lining is cleaned out, and the residual thickness retaining working lining is at 82mm;
2) after adopting aluminium silicon carbide chamotte to add water, working lining is coated with flat; Aluminium silicon carbide chamotte is 100:26 with the ratio of water;
3) natural drying is carried out, 24.5 hours drying times to the flat working lining of painting;
4) build fire brick layer by laying bricks or stones in a conventional manner, refractory brick adopts structure identical, and size has different abnormal shape one, abnormal shape two and special-shaped three is carried out cooperation and built by laying bricks or stones, listed by part table 1; Every ring is built by laying bricks or stones and is adopted neck brick to close door to centre; Build by laying bricks or stones and all adopt wet block, mud plumpness is 96%, and brickwork joint is no more than 2 ㎜ and ring distortion is no more than 8 ㎜;
5) build by laying bricks or stones and terminate and after removing all supports, smear to tight by castable to the front end of fish torpedo ladle and afterbody wall junction;
6) carry out toasting and being incubated according to the stage:
Carry out first stage baking and insulation: be evenly warming up to 300 DEG C by room temperature, the heat time at 20 hours, and is incubated 6.5 hours under 300 DEG C of conditions;
Carry out second stage baking and insulation: be evenly warming up to 610 DEG C by 300 DEG C, the heat time is 16 hours, and is incubated 3 hours under 610 DEG C of conditions;
Carry out phase III baking and insulation: be evenly warming up to 1000 DEG C by 610 DEG C, the heat time is 13.5 hours, and is incubated 5.5 hours under 1000 DEG C of conditions;
Carry out fourth stage baking and insulation: by 1000 DEG C of uniform decrease in temperature to 950 DEG C, the heat time is 2.5 hours, and is incubated 2 hours under 950 DEG C of conditions; Stand-by.
Through statistics, this repair time shares 45 hours, and shortened for 53% duration than original, refractory material use amount is 15 tons, reduces 57.1% than original use amount, and tank reaches 1352 times age.
Embodiment 3
Carry out maintenance to 320 tons of fish torpedo ladle cone process layers to build by laying bricks or stones, it carries out according to following steps:
1) when its fish torpedo ladle need overhaul, first working lining is cleaned out, and the residual thickness retaining working lining is at 85mm;
2) after adopting aluminium silicon carbide chamotte to add water, working lining is coated with flat; Aluminium silicon carbide chamotte is 100:26 with the ratio of water;
3) natural drying is carried out, 25 hours drying times to the flat working lining of painting;
4) build fire brick layer by laying bricks or stones in a conventional manner, refractory brick adopts structure identical, and size has different abnormal shape one, abnormal shape two and special-shaped three is carried out cooperation and built by laying bricks or stones, listed by part table 1; Every ring is built by laying bricks or stones and is adopted neck brick to close door to centre; Build by laying bricks or stones and all adopt wet block, mud plumpness is 96%, and brickwork joint is no more than 2 ㎜ and ring distortion is no more than 8 ㎜;
5) build by laying bricks or stones and terminate and after removing all supports, smear to tight by castable to the front end of fish torpedo ladle and afterbody wall junction;
6) carry out toasting and being incubated according to the stage:
Carry out first stage baking and insulation: be evenly warming up to 310 DEG C by room temperature, the heat time at 22 hours, and is incubated 7 hours under 310 DEG C of conditions;
Carry out second stage baking and insulation: be evenly warming up to 590 DEG C by 310 DEG C, the heat time is 15.5 hours, and is incubated 2.2 hours under 590 DEG C of conditions;
Carry out phase III baking and insulation: be evenly warming up to 990 DEG C by 590 DEG C, the heat time is 13.8 hours, and is incubated 4.5 hours under 990 DEG C of conditions;
Carry out fourth stage baking and insulation: by 990 DEG C of uniform decrease in temperature to 965 DEG C, the heat time is 2 hours, and is incubated 2.5 hours under 965 DEG C of conditions; Stand-by.
Through statistics, this repair time shares 48 hours, and shortened for 50% duration than original, refractory material use amount is 17 tons, reduces 51.1% than original use amount, and tank reaches 1358 times age.
Above-described embodiment is only the best and exemplifies, and is not the restriction to embodiments of the present invention.
Claims (3)
1. a maintenance building method for 320 tons of fish torpedo ladle cone process layers, its step:
1) when its fish torpedo ladle need overhaul, first working lining is cleared up, and the residual thickness retaining working lining is not less than 80mm;
2) after adopting aluminium silicon carbide chamotte to add water, working lining is coated with flat;
3) natural drying is carried out to the flat working lining of painting, be not less than 24 hours drying time;
4) build fire brick layer by laying bricks or stones in a conventional manner, refractory brick adopts structure identical, and size has different abnormal shape one, abnormal shape two and special-shaped three is carried out cooperation and built by laying bricks or stones; Every ring is built by laying bricks or stones and is adopted neck brick to close door to centre; Build by laying bricks or stones and all adopt wet block, mud plumpness is not less than 95%, and brickwork joint is no more than 2 ㎜, and ring distortion is no more than 8 ㎜;
5) build by laying bricks or stones and terminate and after removing all supports, smear to tight by castable to the front end of fish torpedo ladle and afterbody wall junction;
6) carry out toasting and being incubated according to the stage:
Carry out first stage baking and insulation: be evenly warming up to by room temperature and be no more than 310 DEG C, the heat time is not less than 20 hours, and be not less than 6 hours being no more than under 310 DEG C of conditions insulation;
Carry out second stage baking and insulation: be evenly warming up to be no more than 610 DEG C by being no more than 310 DEG C, the heat time is not less than 15 hours, and be not less than 2 hours being no more than insulation under 610 DEG C of conditions;
Carry out phase III baking and insulation: be evenly warming up to be no more than 1000 DEG C by being no more than 610 DEG C, the heat time is not less than 13 hours, and be not less than 4 hours being no more than insulation under 1000 DEG C of conditions;
Carry out fourth stage baking and insulation: by being no more than 1000 DEG C of uniform decrease in temperature to being not less than 950 DEG C, the heat time is not less than 2 hours, and be not less than 2 hours being not less than under 950 DEG C of conditions insulation; Stand-by.
2. the maintenance building method of a kind of 320 tons of fish torpedo ladle cone process layers as claimed in claim 1, is characterized in that: the specification of described special form brick one, special form brick two and special form brick three:
Special form brick one: a length of side is 144mm, the b length of side be 144mm, the c length of side be 150mm, the d length of side be 150mm, the e length of side be 120mm, h limit height is 300mm;
Special form brick two: a ' length of side is 142mm, b ' length of side be 138mm, c ' length of side be 150mm, d ' length of side be 146mm, e ' length of side be 120mm, h ' limit height is 300mm;
The length of side is 138mm, c to special form brick three: a " length of side is 140mm, b " " length of side is 150mm, d " that the length of side is 148mm, e " length of side is 120mm, h " that limit height is 300mm.
3. the maintenance building method of a kind of 320 tons of fish torpedo ladle cone process layers as claimed in claim 1, is characterized in that: described aluminium silicon carbide chamotte is 100:26 with the ratio of water, and stirs.
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| CN201310313090.5A CN103350221B (en) | 2013-07-24 | 2013-07-24 | Method for maintaining and building 320-ton torpedo ladle cone working layer |
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| CN201310313090.5A CN103350221B (en) | 2013-07-24 | 2013-07-24 | Method for maintaining and building 320-ton torpedo ladle cone working layer |
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| CN103350221B true CN103350221B (en) | 2015-06-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103949627B (en) * | 2014-04-28 | 2016-07-06 | 武汉钢铁(集团)公司 | A kind of ladle tank is along masonry construction and method |
| CN106312035B (en) * | 2016-09-30 | 2018-08-21 | 北京利尔高温材料股份有限公司 | A kind of repairing method of ladle slag line position circumferential weld |
| CN107999732B (en) * | 2017-11-07 | 2019-10-18 | 河钢股份有限公司承德分公司 | Ultra-low carbon coating tundish builds by laying method |
| CN108115123B (en) * | 2017-11-23 | 2020-02-14 | 武汉钢铁集团耐火材料有限责任公司 | Maintenance method for working layer of straight barrel slag line area of torpedo ladle |
| CN113866207A (en) * | 2021-09-17 | 2021-12-31 | 北京首钢股份有限公司 | Method and system for detecting erosion of refractory material of torpedo tank body |
| CN113817483B (en) * | 2021-09-29 | 2024-01-30 | 中冶焦耐(大连)工程技术有限公司 | Construction method for chute area of coke dry quenching furnace |
| CN114643351B (en) * | 2022-05-19 | 2022-07-22 | 河北纵横集团丰南钢铁有限公司 | Steel ladle for cleaning and transferring residual slag of weathering resistant steel liquid steel |
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2013
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| JP2000212624A (en) * | 1999-01-19 | 2000-08-02 | Kawasaki Steel Corp | Repair of lining refractory in torpedo ladle |
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Effective date of registration: 20170711 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
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Granted publication date: 20150610 Termination date: 20200724 |