CN104896963B - A kind of method of online removing heat treatment furnace bottom roller dross - Google Patents
A kind of method of online removing heat treatment furnace bottom roller dross Download PDFInfo
- Publication number
- CN104896963B CN104896963B CN201510376216.2A CN201510376216A CN104896963B CN 104896963 B CN104896963 B CN 104896963B CN 201510376216 A CN201510376216 A CN 201510376216A CN 104896963 B CN104896963 B CN 104896963B
- Authority
- CN
- China
- Prior art keywords
- steel plate
- dross
- heat treatment
- treatment furnace
- removing heat
- 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.)
- Active
Links
Abstract
A kind of method that the invention discloses online removing heat treatment furnace bottom roller dross, the present invention is when need not blowing out, effectively utilize heat-treatment furnace tempering and two state of temperatures of normalizing, timing will be processed be tempered and during two kinds of techniques conversions of normalizing, can effectively reduce because processing the impact on production efficiency that furnace hearth roller salamander causes；The present invention can effectively solve the generation of the heat-treated steel plate following table impression caused because of furnace hearth roller salamander, and the appearance yield of heat-treated steel panel products is greatly improved；Compared with traditional method, the present invention has easy and simple to handle, low cost, the advantage little on production efficiency impact, saves substantial amounts of manpower and materials, is effectively increased plate quality simultaneously.
Description
Technical field
The present invention relates to slab heat-treatment furnace and lead to stove technical field, a kind of method of online removing heat treatment furnace bottom roller dross.
Background technology
At present; domestic each large iron and steel enterprise carries out heat treatment and mainly uses a kind of nitrogen protection non-oxidation roller hearth heat-treated furnace steel plate; this heat-treatment furnace has that production efficiency is high, consume energy the advantage such as low; flame produces heat in radial canal internal-combustion; by heat radiation, steel plate in stove is heated; and due to continuous inflated with nitrogen in stove, it is ensured that the steel plate processed except iron scale through ball blast does not produce secondary oxidation iron sheet in heat treatment process, and the surface quality of steel plate has been effectively ensured.
But finding in actual production, heat treatment furnace bottom roller is through use after a while, the phenomenon of meeting appearance dross in various degree.Through analyzing, mainly there is some reason following can cause furnace hearth roller salamander: (1) furnace sealing the most sternly causes air to enter in stove, during lifting during fire door turnover steel plate before and after especially, enter air, resulting in oxidizing atmosphere, this is also proximate to the basic reason that the furnace hearth roller salamander in the range of 5 meters of before and after's fire door is the most serious；(2) radial canal ruptures and causes combustion air or coal gas to enter in stove；(3) before steel plate hot processes, following table ball blast is not thorough, causes bringing in stove iron scale into.
Growing along with the exploitation of domestic Ge great steel mill high-end sheet material, heat treatment furnace bottom roller dross has become as the key factor that puzzlement think gauge heat-treated steel plate surface quality promotes.Currently for the mode processing generally employing blowing out reconditioning of furnace hearth roller salamander, process and once need more than 3 days, waste time and energy, and have a strong impact on the production efficiency of heat-treatment furnace, need a kind of novel online solution of exploration badly.
Through retrieval, following patent application is currently mainly had to relate to the solution of non-oxidation heat processing furnace furnace hearth roller salamander.
CN102914174A discloses a kind of non-oxidation heat processing furnace and prevents the logical stove method of furnace hearth roller salamander, the method is mainly under the high temperature of 800 DEG C, fire door before and after unlatching, the steel plate of 80mm*2300*7000mm specification is run in stove repeatedly, utilize steel plate deadweight that the iron scale dross on hearth roll is rolled into thin slice to be fitted on hearth roll, to alleviate the furnace hearth roller salamander impact on steel plate following table.But along with continuing to build up of iron scale, the dross of hearth roll can be increasingly severe, causes this kind of method subsequent failure.
CN101968320A discloses a kind of method removing roller hearth type non-oxidation furnace furnace hearth roller salamander, and the method is mainly under the furnace temperature of 500 DEG C, by dragging the phase mutual friction of stove plate following table and hearth roll, removes the dross on hearth roll.Although this method can remove dross to a certain extent, but operation is complicated, and needs by the equipment such as hoist engine, chain, the longest.
Summary of the invention
For the deficiencies in the prior art, a kind of method that it is an object of the invention to provide online removing heat treatment furnace bottom roller dross, by formulating reasonably time stove system, under not blowing out state, on the premise of reducing production efficiency impact as far as possible, effectively remove 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 method of online removing heat treatment furnace bottom roller dross, it is characterised in that: comprise the following steps:
(1) make hearth roll and plow stove steel plate, standby；
(2) at the end of producing 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 oven door opening front and back, set Steel Plate Information at HMI operation and control interface, control the automatic shove charge of steel plate, manually set roller table speed, make steel plate arrive at fire door quickly through after hearth roll；During by hearth roll, special handling 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 at, steel plate can make part dross come off by shock in running；
(5) repeat step (3) and step (4), make time stove steel plate move reciprocatingly between fire door front and back, until the furnace hearth roller salamander of more than 80% is removed；
(6) time stove steel plate is come out of the stove, close fire door；
(7) in-furnace temperature rising to normalizing temperature, temperature controls between 850 DEG C-910 DEG C, make time stove steel plate front and back between fire door speed move reciprocatingly；
(8) repeat step (3) and arrive step (5) two to three times, make the residual oxygen iron sheet dross sticking on hearth roll thinning and be fitted on hearth roll, reduce the remaining dross impact on following table quality as far as possible.
Further, the high-strength steel sheet that steel plate is 70mm*3100mm*9000mm in described step (1), the gap of fishbone is cut out along steel plate length direction NC Flame Cutting equipment.The gap of described steel plate has 3 row, fishbone gap to be specially symmetrically arranged rectangle gap, to increase the contact impact area of steel plate and dross.
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 is when need not blowing out, effectively utilize heat-treatment furnace tempering and two state of temperatures of normalizing, timing will be processed be tempered and during two kinds of techniques conversions of normalizing, can effectively reduce because processing the impact on production efficiency that furnace hearth roller salamander causes；
2, the present invention can effectively solve the generation of the heat-treated steel plate following table impression caused because of furnace hearth roller salamander, and the appearance yield of heat-treated steel panel products is greatly improved；
3, compared with traditional method, the present invention has easy and simple to handle, low cost, the advantage little on production efficiency impact, saves substantial amounts of manpower and materials, is effectively increased plate quality simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of invention time stove steel plate.
In figure: 1-steel plate, 2-gap.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention the present invention is further illustrated.
A kind of method of online removing heat treatment furnace bottom roller dross, comprises the following steps:
(1) make hearth roll and plow stove steel plate: as shown in the figure shown in 1, choosing a specification is the high-strength steel sheet of 70mm*3100mm*9000mm, cut out the gap of 3 row fishbones along steel plate length direction NC Flame Cutting equipment, described gap is specially symmetrically arranged rectangle gap, standby；
(2) at the end of producing 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 oven door opening front and back, set Steel Plate Information at HMI operation and control interface, control the automatic shove charge of steel plate, manually roller table speed is set as 19m/min, make steel plate arrive at fire door quickly through after hearth roll；During by hearth roll, special handling 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 at, steel plate can make part dross come off by shock in running；
(5) repeat step (3) and step (4), make time stove steel plate front and back between fire door speed with 19m/min move reciprocatingly, until by the furnace hearth roller salamander removal of more than 80%；
(6) time stove steel plate is come out of the stove, close fire door；
(7) in-furnace temperature rising to normalizing temperature, temperature controls between 850 DEG C-910 DEG C, make time stove steel plate front and back between fire door speed with 10m/min move reciprocatingly；
(8) repeat step (3) and arrive step (5) two to three times, make the residual oxygen iron sheet dross sticking on hearth roll thinning and be fitted on hearth roll, reduce the remaining dross impact on following table quality as far as possible.
Whole operating process takes around an order of classes or grades at school, and 8 hours, time stove steel plate of making can be with Reusability.
The foregoing is only the preferred embodiment of invention, be not the restriction to invention.Change that those of ordinary skill in the art is made in the essential scope of the present invention, retrofit, add or replace, also should belong to the protection domain of invention.
Claims (8)
1. the method for an online removing heat treatment furnace bottom roller dross, it is characterised in that: comprise the following steps:
(1) make hearth roll and plow stove steel plate, standby；
(2) at the end of producing 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 oven door opening front and back, set Steel Plate Information at HMI operation and control interface, control the automatic shove charge of steel plate, manually set roller table speed, make steel plate arrive at fire door quickly through after hearth roll；During by hearth roll, special handling 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 at, steel plate can make part dross come off by shock in running；
(5) repeat step (3) and step (4), make time stove steel plate move reciprocatingly between fire door front and back, until the furnace hearth roller salamander of more than 80% is removed；
(6) time stove steel plate is come out of the stove, close fire door；
(7) in-furnace temperature rising to normalizing temperature, temperature controls between 850 DEG C-910 DEG C, makes time stove steel plate move reciprocatingly between fire door front and back；
(8) repeat step (3) and arrive step (5) two to three times, make the residual oxygen iron sheet dross sticking on hearth roll thinning and be fitted on hearth roll, reduce the remaining dross impact on following table quality as far as possible.
The method of online removing heat treatment furnace bottom roller dross the most according to claim 1, it is characterized in that: the high-strength steel sheet that steel plate is 70mm*3100mm*9000mm in described step (1), cut out the gap of fishbone along steel plate length direction NC Flame Cutting equipment.
The method of online removing heat treatment furnace bottom roller dross the most according to claim 2, it is characterised in that: the gap of described steel plate has 3 row.
4. according to the online method removing heat treatment furnace bottom roller dross described in Claims 2 or 3, it is characterised in that: described fishbone gap is specially symmetrically arranged rectangle gap.
5. according to the online method removing heat treatment furnace bottom roller dross described in claim 1 or 2 or 3, it is characterised in that: the furnace temperature in described step (2) is 650 DEG C.
6. according to the online method removing heat treatment furnace bottom roller dross described in claim 1 or 2 or 3, it is characterised in that: the reciprocating speed of service of described step (5) light plate is 19m/min.
7. according to the online method removing heat treatment furnace bottom roller dross described in claim 1 or 2 or 3, it is characterised in that: the furnace temperature in described step (7) is 910 DEG C.
8. according to the online method removing heat treatment furnace bottom roller dross described in any one of claim 1 or 2 or 3, it is characterised in that: in described step (7), time reciprocating speed of stove steel plate is 10m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510376216.2A CN104896963B (en) | 2015-07-01 | 2015-07-01 | A kind of method of online removing heat treatment furnace bottom roller dross |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510376216.2A CN104896963B (en) | 2015-07-01 | 2015-07-01 | A kind of method of online removing heat treatment furnace bottom roller dross |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104896963A CN104896963A (en) | 2015-09-09 |
| CN104896963B true CN104896963B (en) | 2016-09-28 |
Family
ID=54029780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510376216.2A Active CN104896963B (en) | 2015-07-01 | 2015-07-01 | A kind of method of online removing heat treatment furnace bottom roller dross |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104896963B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118131B (en) * | 2017-11-27 | 2019-05-14 | 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 |
| 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201217674Y (en) * | 2008-05-21 | 2009-04-08 | 邯郸钢铁股份有限公司 | Furnace hearth roller salamander removing apparatus |
| CN102851477A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Method for reducing hearth roll mark defect on steel plate surface |
| CN102636041B (en) * | 2012-03-27 | 2014-07-02 | 马钢(集团)控股有限公司 | Continuous heat treatment furnace with function of clearing metal accretions on furnace rollers and process method for clearing accretions on furnace rollers |
| CN203274530U (en) * | 2013-05-16 | 2013-11-06 | 周杨 | Roller bottom type thermal treatment furnace roller dross eliminating device |
| CN203479037U (en) * | 2013-09-13 | 2014-03-12 | 武汉钢铁(集团)公司 | Furnace dragging device for removing dross on furnace bottom roller of roller bottom type heat treatment furnace |
| CN103968676A (en) * | 2014-04-21 | 2014-08-06 | 鞍钢股份有限公司 | Method for removing hung wax from thermal treatment furnace bottom roller |
| 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 |
-
2015
- 2015-07-01 CN CN201510376216.2A patent/CN104896963B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104896963A (en) | 2015-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104896963B (en) | A kind of method of online removing heat treatment furnace bottom roller dross | |
| CN107630135B (en) | A method of alleviating furnace roller dross degree and the post-processing of furnace roller dross | |
| CN105127746B (en) | The production technology of bearing ring | |
| CN104745780A (en) | Production method for forging and thermally treating Cr12MoV steel | |
| CN101968320B (en) | Method for removing salamander from hearth roller of roller-hearth non-oxidation furnace | |
| CN111575451A (en) | Cold-rolled strip steel continuous annealing process with energy-saving effect | |
| CN102560064A (en) | Integral thermal treatment process for roller shell of high-pressure roller mill | |
| CN100371467C (en) | Ingot slow cool annealing process for low-carbon steel | |
| CN102605147A (en) | Method for carrying out normalizing heat treatment by using waste heat from forging of forged piece | |
| CN104101221A (en) | Heating system and heating method for recycling flue gas waste heat to maximum and reducing combustion loss | |
| CN204739923U (en) | Clear away device of heat treatment furnace hearth roll dross on line | |
| CN203980920U (en) | The heating system of a kind of limit Mist heat recovering and scaling loss minimizing | |
| CN205175146U (en) | Safe efficient intermediate frequency furnace dust pelletizing system | |
| CN203479037U (en) | Furnace dragging device for removing dross on furnace bottom roller of roller bottom type heat treatment furnace | |
| CN205893345U (en) | Heating temperature adjustable multi -use bearing heat treatment furnace | |
| CN204661790U (en) | One effectively can be corrected steel billet and to be dispelled the heat the hot cog transferring device of diastrophic steel billet | |
| CN109266834A (en) | A method of alleviating furnace roller dross degree and the post-processing of furnace roller dross | |
| CN201778068U (en) | Quenching furnace tail gas combustion heat recycling system | |
| CN204138717U (en) | The overall step heating-furnace of a kind of pole | |
| CN103968676A (en) | Method for removing hung wax from thermal treatment furnace bottom roller | |
| CN204237829U (en) | Liftable type on-line continuous induction heater support frame means | |
| CN102876875A (en) | Method for performing full annealing heat treatment for alloy steel pipe | |
| CN203440424U (en) | Siderite magnetization roasting shaft furnace | |
| CN214830554U (en) | Simple and efficient local annealing device | |
| CN105483602A (en) | Heating method for thinning heavy rail decarburized layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
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. |