CN104896963A - Device and method for online removing accretions on furnace bottom roller of heat treatment furnace - Google Patents
Device and method for online removing accretions on furnace bottom roller of heat treatment furnace Download PDFInfo
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- CN104896963A CN104896963A CN201510376216.2A CN201510376216A CN104896963A CN 104896963 A CN104896963 A CN 104896963A CN 201510376216 A CN201510376216 A CN 201510376216A CN 104896963 A CN104896963 A CN 104896963A
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Abstract
The invention discloses a device and a method for online removing accretions on a furnace bottom roller of a heat treatment furnace. The device comprises a steel plate placed on the furnace bottom roller, wherein the steel plate is a high-strength steel plate of 70mm*3,100mm*9,000mm; a herringbone opening is formed by using numerical control flame cutting equipment to cut along the length direction of the steel plate. According to the device and the method disclosed by the invention, under the state that the shut-down is not needed, tempering and normalizing temperature states of the heat treatment furnace are effectively utilized, and the treatment time is selected in the switching process of a tempering technology and a normalizing technology, so that the influence on the production efficiency caused by the treatment on the accretions of the furnace bottom roller can be effectively reduced; indentations on the lower surface of the steel plate subjected to heat treatment due to the accretions of the furnace bottom roller can be effectively removed, and further the appearance qualified rate of steel plate products subjected to heat treatment is greatly improved; compared with a traditional method, the method disclosed by the invention has the advantages of simpleness and convenience in operation, low cost and less influence on the production efficiency; a large amount of labor and material resources are reduced; meanwhile, the quality of the steel plate is effectively improved.
Description
Technical field
The present invention relates to slab heat-treatment furnace and lead to stove technical field, especially a kind of device and method of online removing heat treatment furnace bottom roller dross.
Background technology
At present; domestic each large iron and steel enterprise heat-treats a kind of nitrogen protection non-oxidation roller hearth heat-treated furnace of main use to steel plate; this heat-treatment furnace has that production efficiency is high, consume energy the advantage such as low; flame produces heat in radiant tube internal-combustion; by heat radiation, steel plate in stove is heated; and due to continuously to inflated with nitrogen in stove, can ensure in heat treatment process, not produce secondary oxidation iron sheet except the steel plate of iron scale process through ball blast, effectively ensure that the surface quality of steel plate.
But find in actual production, heat treatment furnace bottom roller, through use after a while, understands the phenomenon of appearance dross in various degree.By analysis, mainly contain some reason following and can cause furnace hearth roller salamander: (1) furnace sealing does not sternly cause air to enter in stove, especially lift in process during fire door turnover steel plate before and after, enter air, cause forming oxidizing atmosphere, this is also the most serious basic reason of furnace hearth roller salamander within the scope of 5 meters, front and back fire door; (2) radiant tube breaks and causes combustion air or coal gas to enter in stove; (3) before steel plate hot process, following table ball blast is not thorough, causes iron scale to be brought in stove.
Growing along with the exploitation of domestic Ge great steel mill high-end sheet material, heat treatment furnace bottom roller dross has become the key factor that puzzlement think gauge heat-treated steel plate surface quality promotes.At present, the process for furnace hearth roller salamander adopts the mode of blowing out reconditioning usually, and process once needs more than 3 days, wastes time and energy, and has a strong impact on the production efficiency of heat-treatment furnace, needs badly and explores a kind of novel online solution.
At present, remove the logical stove method of heat treatment furnace bottom roller dross, mainly utilizing steel plate deadweight that the iron scale dross on hearth roll is rolled into thin slice is fitted on hearth roll, to alleviate the impact of furnace hearth roller salamander on steel plate following table, but along with the continuation of iron scale is accumulated, the dross of hearth roll can be more and more serious, causes this kind of method subsequent failure.Or by dragging stove plate following table and the phase mutual friction of hearth roll, remove the dross on hearth roll.Although this method can remove dross to a certain extent, complicated operation, and need by the equipment such as hoist engine, chain, consuming time longer.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of device and method of online removing heat treatment furnace bottom roller dross, by formulating reasonably time stove system, under not blowing out state, reducing under the prerequisite on production efficiency impact as far as possible, effective removing furnace hearth roller salamander, to improve the quality of thick steel plates lower surface.
For achieving the above object, the technical solution used in the present invention is: a kind of device of online removing heat treatment furnace bottom roller dross, comprise the steel plate be placed on furnace roller, described steel plate is the high-strength steel sheet of 70mm*3100mm*9000mm, cuts out the gap of fishbone along steel plate length direction NC Flame Cutting equipment.
Further, the gap of described steel plate has 3 row, and fishbone gap is specially symmetrically arranged rectangle gap, to increase the contact impact area of steel plate and dross.
A method for online removing heat treatment furnace bottom roller dross, comprises the following steps:
(1) make above-mentioned hearth roll and plow stove steel plate, for subsequent use;
(2) at the end of production tempered steel plate, steel plate in stove is emptied, by Control for Kiln Temperature between 550 DEG C-650 DEG C, time stove steel plate made in advance is placed into stokehold feeding roller table, uses centralising device by steel plate centering;
(3) by front and back oven door opening, at HMI operation and control interface setting Steel Plate Information, control the automatic shove charge of steel plate, manually setting roller table speed, making steel plate quickly through arriving fire door place after hearth roll; In the process passing through hearth roll, the steel plate of specially treated and hearth roll fast ram can make part dross come off;
(4) hearth roll is adjusted to manual mode, manually by steel plate with the fastest pullback speed to front fire door place, steel plate can make part dross come off by shock in running;
(5) repeat step (3) and step (4), time stove steel plate is moved reciprocatingly, until removed by the furnace hearth roller salamander of more than 80% between the fire door of front and back;
(6) stove steel plate will be plowed to come out of the stove, close fire door;
(7) in-furnace temperature is risen to normalizing temperature, temperature controls between 850 DEG C-910 DEG C, and time stove steel plate speed between the fire door of front and back is moved reciprocatingly;
(8) repeat step (3) to step (5) two to three times, make to stick in residual oxygen iron sheet dross on hearth roll thinning and be fitted on hearth roll, reduce the impact of remaining dross on following table quality as far as possible.
Further, the furnace temperature in described step (2) is 650 DEG C, and the reciprocating speed of service of step (5) light plate is 19m/min, and the furnace temperature in described step (7) is 910 DEG C, and time reciprocating speed of stove steel plate is 10m/min.
The invention has the beneficial effects as follows:
1, the present invention plows furnace apparatus employing with the thick steel plates of fishbone, effectively increases the contact area at steel plate and furnace hearth roller salamander position, and the probability that dross can be made to come off in steel plate with wheel bottom roller knockout process increases greatly;
2, the present invention is under the state not needing blowing out, effectively utilize heat-treatment furnace tempering and normalizing two state of temperatures, by process choose opportunities in the process of tempering and the conversion of normalizing two kinds of techniques, effectively can reduce the impact on production efficiency because process furnace hearth roller salamander causes;
3, the present invention effectively can solve the generation of the heat-treated steel plate following table impression caused because of furnace hearth roller salamander, significantly improves the appearance yield of heat-treated steel panel products;
4, compared with conventional method, the present invention have easy and simple to handle, cost is low, affects little advantage to production efficiency, saves a large amount of manpower and materials, simultaneously effectively improves plate quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of contrive equipment.
In figure: 1-steel plate, 2-gap.
Detailed description of the invention
Below in conjunction with the drawings and the specific embodiments, invention is further described.
As shown in the figure: a kind of device of online removing heat treatment furnace bottom roller dross, comprise the steel plate be placed on furnace roller, described steel plate is the high-strength steel sheet of 70mm*3100mm*9000mm, the gap of fishbone is cut out along steel plate length direction NC Flame Cutting equipment, described gap has 3 row, concrete shape is symmetrically arranged rectangle gap, to increase the contact impact area of steel plate and dross.
A method for online removing heat treatment furnace bottom roller dross, comprises the following steps:
(1) make above-mentioned hearth roll and plow stove steel plate, for subsequent use;
(2) at the end of production tempered steel plate, steel plate in stove is emptied, by Control for Kiln Temperature between 550 DEG C-650 DEG C, time stove steel plate made in advance is placed into stokehold feeding roller table, uses centralising device by steel plate centering;
(3) by front and back oven door opening, at HMI operation and control interface setting Steel Plate Information, control the automatic shove charge of steel plate, manually roller table speed being set as 19m/min, making steel plate quickly through arriving fire door place after hearth roll; In the process passing through hearth roll, specially treated steel plate and hearth roll fast ram can make part dross come off;
(4) hearth roll is adjusted to manual mode, manually by steel plate with the fastest pullback speed to front fire door place, steel plate can make part dross come off by shock in running;
(5) repeat step (3) and step (4), time speed of stove steel plate with 19m/min between the fire door of front and back is moved reciprocatingly, until removed by the furnace hearth roller salamander of more than 80%;
(6) stove steel plate will be plowed to come out of the stove, close fire door;
(7) in-furnace temperature is risen to normalizing temperature, temperature controls between 850 DEG C-910 DEG C, and time speed of stove steel plate with 10m/min between the fire door of front and back is moved reciprocatingly;
(8) repeat step (3) to step (5) two to three times, make to stick in residual oxygen iron sheet dross on hearth roll thinning and be fitted on hearth roll, reduce the impact of remaining dross on following table quality as far as possible.
Whole operating process approximately needs an order of classes or grades at school, 8 hours, and time stove steel plate of making can Reusability.
The foregoing is only the preferred embodiment of invention, is not the restriction to invention.The change that those of ordinary skill in the art makes in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to the protection domain of invention.
Claims (8)
1. remove the device of heat treatment furnace bottom roller dross online for one kind, comprise the steel plate be placed on furnace roller, it is characterized in that: described steel plate is the high-strength steel sheet of 70mm*3100mm*9000mm, cut out the gap of fishbone along steel plate length direction NC Flame Cutting equipment.
2. the device of online removing heat treatment furnace bottom roller dross according to claim 1, is characterized in that: the gap of described steel plate has 3 row.
3. the device of online removing heat treatment furnace bottom roller dross according to claim 1 and 2, is characterized in that; Described fishbone gap is specially symmetrically arranged rectangle gap.
4. the online method removing heat treatment furnace bottom roller dross, is characterized in that: comprise the following steps:
(1) make hearth roll and plow stove steel plate, for subsequent use;
(2) at the end of production tempered steel plate, steel plate in stove is emptied, by Control for Kiln Temperature between 550 DEG C-650 DEG C, time stove steel plate made in advance is placed into stokehold feeding roller table, uses centralising device by steel plate centering;
(3) by front and back oven door opening, at HMI operation and control interface setting Steel Plate Information, control the automatic shove charge of steel plate, manually setting roller table speed, making steel plate quickly through arriving fire door place after hearth roll; In the process passing through hearth roll, the steel plate of specially treated and hearth roll fast ram can make part dross come off;
(4) hearth roll is adjusted to manual mode, manually by steel plate with the fastest pullback speed to front fire door place, steel plate can make part dross come off by shock in running;
(5) repeat step (3) and step (4), time stove steel plate is moved reciprocatingly, until removed by the furnace hearth roller salamander of more than 80% between the fire door of front and back;
(6) stove steel plate will be plowed to come out of the stove, close fire door;
(7) in-furnace temperature is risen to normalizing temperature, temperature controls between 850 DEG C-910 DEG C, and time stove steel plate speed between the fire door of front and back is moved reciprocatingly;
(8) repeat step (3) to step (5) two to three times, make to stick in residual oxygen iron sheet dross on hearth roll thinning and be fitted on hearth roll, reduce the impact of remaining dross on following table quality as far as possible.
5. the method for online removing heat treatment furnace bottom roller dross according to claim 4, is characterized in that: the furnace temperature in described step (2) is 650 DEG C.
6. the method for online removing heat treatment furnace bottom roller dross according to claim 4, is characterized in that: the reciprocating speed of service of described step (5) light plate is 19m/min.
7. the method for online removing heat treatment furnace bottom roller dross according to claim 4, is characterized in that: the furnace temperature in described step (7) is 910 DEG C.
8. the method for the online removing heat treatment furnace bottom roller dross according to any one of claim 4 to 7, is characterized in that: in described step (7), time reciprocating speed of stove steel plate is 10m/min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118131A (en) * | 2017-11-27 | 2018-06-05 | 山东钢铁股份有限公司 | A kind of method that high temperature quickly removes heat treatment furnace bottom roller dross |
| CN109234510A (en) * | 2018-10-31 | 2019-01-18 | 唐山中厚板材有限公司 | A kind of device for avoiding heat-treated steel plate from generating mass defect because of furnace hearth roller salamander |
| CN109489430A (en) * | 2018-09-05 | 2019-03-19 | 宝钢特钢韶关有限公司 | A method of removal heating furnace water beam pad block dross |
| CN111663030A (en) * | 2020-06-17 | 2020-09-15 | 浦项(张家港)不锈钢股份有限公司 | Method for preventing foreign matter from adhering to roller surface of hearth roller and device for preventing iron scale from adhering |
| CN113267058A (en) * | 2021-05-20 | 2021-08-17 | 中天钢铁集团有限公司 | Method for removing nodules on heat-resistant sliding block of walking beam of heat storage type heating furnace |
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| CN103968676A (en) * | 2014-04-21 | 2014-08-06 | 鞍钢股份有限公司 | Method for removing paraffin on bottom roller of heat treatment furnace |
| CN204739923U (en) * | 2015-07-01 | 2015-11-04 | 山东钢铁股份有限公司 | Clear away device of heat treatment furnace hearth roll dross on line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118131A (en) * | 2017-11-27 | 2018-06-05 | 山东钢铁股份有限公司 | A kind of method that high temperature quickly removes heat treatment furnace bottom roller dross |
| CN109489430A (en) * | 2018-09-05 | 2019-03-19 | 宝钢特钢韶关有限公司 | A method of removal heating furnace water beam pad block dross |
| CN109234510A (en) * | 2018-10-31 | 2019-01-18 | 唐山中厚板材有限公司 | A kind of device for avoiding heat-treated steel plate from generating mass defect because of furnace hearth roller salamander |
| CN111663030A (en) * | 2020-06-17 | 2020-09-15 | 浦项(张家港)不锈钢股份有限公司 | Method for preventing foreign matter from adhering to roller surface of hearth roller and device for preventing iron scale from adhering |
| CN111663030B (en) * | 2020-06-17 | 2022-06-10 | 浦项(张家港)不锈钢股份有限公司 | Method for preventing foreign matter from adhering to roller surface of hearth roller and device for preventing iron scale from adhering |
| CN113267058A (en) * | 2021-05-20 | 2021-08-17 | 中天钢铁集团有限公司 | Method for removing nodules on heat-resistant sliding block of walking beam of heat storage type heating furnace |
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| CN104896963B (en) | 2016-09-28 |
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Effective date of registration: 20181115 Address after: 250100 Shun Tai Square Building No. 4, Shun Hua Road 2000, Jinan High-tech Zone, Shandong Province Patentee after: BAISHAN STEEL (SHANDONG) STEEL PLATE CO., LTD. Address before: 250101 No. 21 Industrial North Road, Licheng District, Jinan City, Shandong Province Patentee before: Shandong Iron & Steel Group Co., Ltd. |