CN103471413A - Online slagging method and device of walking-beam furnace - Google Patents

Online slagging method and device of walking-beam furnace Download PDF

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Publication number
CN103471413A
CN103471413A CN2013104383287A CN201310438328A CN103471413A CN 103471413 A CN103471413 A CN 103471413A CN 2013104383287 A CN2013104383287 A CN 2013104383287A CN 201310438328 A CN201310438328 A CN 201310438328A CN 103471413 A CN103471413 A CN 103471413A
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China
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slag
heating furnace
furnace
heat
walking
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CN2013104383287A
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Chinese (zh)
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CN103471413B (en
Inventor
丁翠娇
蒋扬虎
韩斌
欧阳德刚
宋中华
李明晖
张茂杰
赵利洪
曾萍
杨超
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武汉钢铁(集团)公司
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Abstract

The invention discloses an online slagging method and an online slagging device of a walking-beam furnace. The online slagging device comprises a heat-resistant steel plate which is provided with an opening at the upper part and is in a rectangular box structure. Metal anchoring parts are arranged on the inner wall and the outer wall of the heat-resistant steel plate. The metal anchoring parts and refractory castable are integrally molded. The refractory castable forms a plurality of funnel-shaped bins in a continuous row are formed on the inner wall of the refractory castable. A high-temperature-resistant heat insulating layer is formed on the outer wall of the heat-resistant steel plate. Slagging agent is contained in the bins. Discharge outlets for discharging the slagging agent are respectively formed in the bottoms of the bins. Discharge plugs are respectively arranged in the discharge outlets. By spreading the slagging agent to slag at the bottom the furnace and by using the high internal temperature of the furnace to accelerate chemical reaction between the slagging agent and the solidified slag at the bottom of the furnace, the slag is enabled to be modified and become a low-melting-point slag phase, the flowability of the slag is kept to be good at the working temperature of the furnace, the accumulation of the slag at the bottom of the furnace, especially the earth-surrounded parts of stand columns is reduced and the liquid slag yield of the furnace is improved.

Description

The online slagging method of walking beam heating furnace and device thereof
Technical field
The present invention relates to the online slagging method of heating furnace, refer to particularly the online slagging method of a kind of walking beam heating furnace and device thereof.
Background technology
Orientation silicon steel is the requisite critical materials of industry such as power engineering, motor manufacture, thereby, produce orientation silicon steel very remarkable for steel enterprise economic benefit.With respect to common iron, orientation silicon steel is complex manufacturing not only, and manufacturing technology is strict, is described as " the special steel art work ", and a lot of production links have limited the further raising of silicon steel output.For example, in the orientation silicon steel production process, in order to make the finished product magnetic stability, reduce the uneven magnetic fluctuation brought of heating, before hot rolling, in heating furnace, the heating-up temperature of slab and heat time heating time will be far away higher than common irons, because long-time high-temperature heating, steel slab surface produces a large amount of molten slags, and drop down under continuous along positions such as water beam, columns, be deposited on furnace bottom after solidifying.
Continuous increase along with the furnace bottom slag, particularly near the furnace bottom embankment, slag thickness is too high, not only can have a strong impact on the normal operation of heating furnace machine driven system, the molten slag that even can make slab drop down overflows upright post cofferdam, flows to the furnace bottom water sealed tank and blasts.Therefore, the orientation silicon steel heating furnace, producing a period of time, when slag reaches a certain amount of, must blowing out carry out artificial scarfing cinder.This has not only seriously limited the production capacity of high added value orientation silicon steel, also makes the heating furnace repair and maintenance frequent, and reduce service life, increased production cost and hand labor intensity simultaneously.
For the problems referred to above, at present mainly by the slag-drip device being set, changing the technical measures such as heating-furnace body structure and use cleaning plant, improve slag-drip amount and scarfing cinder efficiency, to extending the heating furnace production cycle both at home and abroad.For example: the Chinese patent that publication number is CN2363184Y, a kind of liquid state slag discharging device for continuous heating furnace is disclosed, by slag notch burner, slag notch passage, granulating device and oven door sealing etc., formed.By changing the technical measures such as nozzle structure and increase slag releasing channel angle of inclination, liquid slag in stove is discharged smoothly, can in slagging channel, not produce solidification phenomenon, improved the rolling cycle amount, reduced heating furnace disorderly closedown number of times.The Chinese patent that publication number is CN202660889U, a kind of slag-drip high temperature orientation silicon steel walking beam type plate blank heating furnace is disclosed, it is characterized in that heating furnace the second bringing-up section and soaking zone are 5 ° of ramp structures, and be provided with the slag-drip mouth at side wall, improved the slag-drip amount, slow down high temperature section furnace bottom slag stackeding speed, extended the heating furnace discontinuous running time.The Chinese patent that publication number is CN102252528A; a kind of liquid slag discharge device of high-temperature silicon steel heating furnace and method are disclosed; specifically comprise slope furnace bottom, slag notch burner, slag notch passage, slag notch fire door, granulating device and slag flushing device; the flow behavior of utilizing the furnace high-temperature liquid slag to have equally; unimpeded by ensureing the furnace bottom flow pass, realize online slag-drip.The Chinese patent that publication number is CN102944122, a kind of silicon steel stove slag cleaning device and application process are disclosed, specifically comprise steel plate, scarfing cinder bar, clamping screw and crowbar, mechanism while contacting with water beam accumulated slag by scarfing cinder bar in scarfing cinder process after blowing out, make the accumulated slag fragmentation, come off, improved artificial scarfing cinder efficiency.The Chinese patent that publication number is CN101839638A, a kind of slag-drip high-temperature silicon steel plate blank heating furnace accumulation of heat and preheating combined heating means are disclosed, it is characterized in that utilizing the heat accumulating type heating technique to reduce stove tail exhaust gas temperature, the homogenizing temperature field in furnace distributes, realize the heating of blank plates of silicon steels, the energy-saving and environmental protection effect is remarkable, but the not special explanation of its liquid towards slag.
Although above-mentioned technology to a certain extent, promoted the discharge of liquid slag, alleviated artificial scarfing cinder intensity after blowing out, played and improved the effect of accumulated slag degree in stove in production process, but can't carry out effectively online the discharge for the solid slag that is deposited on furnace bottom after solidifying.
The slag-drip ratio that reflects current high-temperature heater maximum from disclosed documents and materials data, in 40% left and right, can't solve approximately stove internal solid crust block online problem of discharging at heating furnace work temperature of 60%.In actual production; due to many reasons such as Bottom of Heating Furnace air draught, water beam column and furnace bottom dispel the heat, the cooling of production rolling line fault heating furnace is to be rolled; the Bottom of Heating Furnace temperature usually can be lower than below the slag fusing point; the slag dropped from slab often condenses and gathers at furnace bottom in a large number, can not discharge online by heating furnace slag-drip system.
Particularly at walking beam column fortifield village position and the two adjacent upright middle part, because column water-cooled and furnace bottom hatch frame characteristics, temperature is minimum herein, the slag mobility is the poorest, the slag dropped from slab often condenses and gathers at this in a large number, and progressively stops up the active column open space, hinders walking beam stepping stroke, cause column water beam because of the bending that is obstructed, when serious, crossbeam can occur and column is torn and leaks.Simultaneously, the solid slag of high temperature contacts with column for a long time, easily make column produce localized hyperthermia and vaporization phenomenon occurs, cause that the column perforation is leaked etc., force the heating furnace shutdown maintenance of having to, can't guarantee the normal operation of furnace bottom machine equipment, thereby cause the problems such as production efficiency is low, hand labor intensity is large, the cost of overhaul is high.The local crust block accumulated slag of column fortifield village becomes the current major limitation link that affects heating furnace silicon steel pepriodic rolling amount.
Summary of the invention
Purpose of the present invention will overcome the existing deficiency of prior art exactly, and the online slagging method of a kind of walking beam heating furnace and device thereof are provided.
For achieving the above object, the online slagging method of walking beam heating furnace provided by the present invention comprises the following steps:
1) change the slag device graininess slagging agent of packing into outside stove;
The change slag device that 2) slagging agent will be housed is transported to the feed end of heating furnace, with steel billet, equally pack in heating furnace, and in company with steel billet together in heating furnace stepping move ahead;
3) change the slag device and advance in heating furnace through the preheating section of heating furnace, the first bringing-up section, to the second bringing-up section, the discharging of changing the slag device is packed under the second bringing-up section operating temperature melts, and slagging agent is scattered from the discharging opening of changing the slag device;
4) along with changing the slag device, in heating furnace, constantly move ahead, slagging agent is evenly sowed the centre position of furnace bottom, particularly two adjacent upright;
5) the solid-state crust block of furnace bottom contacts with slagging agent, and chemical reaction at high temperature occurs, and generates the slag phase of low melting point, i.e. liquid steel slag, and the slag-drip system by furnace bottom discharges out of the furnace, thereby reaches at the linearize slag.
The walking beam heating furnace of realizing said method that the present invention is designed is at linearize slag device, the heat-resisting steel sheet and plate that comprises the rectangular box-structure of upper opening, be provided with metal anchorage on the inner and outer wall of described heat-resisting steel sheet and plate, described metal anchorage and castable refractory moulding by casting are integrated; Wherein, described castable refractory forms a plurality of funnel shaped feed bins of platoon at the inwall of heat-resisting steel sheet and plate, and described castable refractory forms the high temperature resistant heat insulation layer at the outer wall of heat-resisting steel sheet and plate; Be filled with slagging agent in described feed bin, the bottom of described feed bin is provided with the discharging opening of discharging for slagging agent, is provided with the discharging filling that can melt under the second bringing-up section operating temperature of heating furnace in described discharging opening.
In such scheme, described heat-resisting steel sheet and plate is single layer structure, is laid with water cooling tube around described heat-resisting steel sheet and plate.Perhaps, the double-decker that described heat-resisting steel sheet and plate is the metal cabinet formula, be cooling water channel in the middle of its interlayer, and the top of described heat-resisting steel sheet and plate is provided with the exhaust outlet be connected with cooling water channel.Like this, water-cooling structure can guarantee change slag device elevated temperature strength, reliable, long service life.
In such scheme, being shaped as of described discharging opening circular, square or oval in a kind of, its opening section amasss 1~10 times into the slagging agent granular size.The opening size of discharging opening can be determined according to the slagging agent particle size.The shape and size of discharging filling are determined according to the discharging opening shape and size.
In such scheme, the water beam sum of the second bringing-up section that the number of described feed bin is heating furnace and soaking zone subtracts one.
In such scheme, the aperture position of described discharging opening is arranged on the second bringing-up section of heating furnace and the Shui Liang middle part of soaking zone.
The present invention is by broadcasting sowing slagging agent to the furnace bottom slag, utilize the heating furnace furnace high-temperature to accelerate the chemical reaction between slagging agent and the solid-state crust block of furnace bottom, urge and make the slag modification, become the slag phase of low melting point, keep good mobility at heating furnace work temperature, reduce slag at furnace bottom, particularly gathering of column fortifield village position, improve heating furnace slag-drip ratio.
Beneficial effect of the present invention is:
(1) by chemical reaction, slag is carried out to modification, greatly reduces the slag fusing point, guaranteed slag in heating furnace work temperature range always in liquid phase state, strengthened the mobility of slag, improve the slag-drip ratio;
(2) by together enter the mode of stove stepping charging with steel billet, slagging agent can broadcast sowing uniformly near the fortifield village of column gap and wait the change slag dead zone of easy accumulated slag, effectively reduce high-temperature steel slag and gather at column fortifield village position, guarantee the normal operation of furnace bottom machine equipment;
(3) sow swimmingly accumulated slag position in stove by funnel type feed bin structure assurance slagging agent;
(4) water-cooling structure has guaranteed change slag device elevated temperature strength, reliable, long service life;
(5) change slag apparatus structure is simple, makes easily, and easy to operate, cost of manufacture and operating cost are cheap;
(6) the inventive method slag deslagging effect is good, can significantly improve silicon steel pepriodic rolling amount, enhance productivity, reduce the shutdown maintenance cost of labor, reduce heating furnace maintenance and scarfing cinder frequency, there is outstanding advantages simple to operate, that implement conveniently, achieve noticeable achievement.
The accompanying drawing explanation
Fig. 1 is the horizontal sectional structure schematic diagram of walking beam heating furnace of the present invention at linearize slag device embodiment 1.
The local structure for amplifying schematic diagram that Fig. 2 is A in Fig. 1.
Fig. 3 is the vertical sectional structure schematic diagram of walking beam heating furnace of the present invention at linearize slag device embodiment 1.
Fig. 4 is the horizontal sectional structure schematic diagram of walking beam heating furnace of the present invention at linearize slag device embodiment 2.
The local structure for amplifying schematic diagram that Fig. 5 is B in Fig. 4.
Fig. 6 is the vertical sectional structure schematic diagram of walking beam heating furnace of the present invention at linearize slag device embodiment 2.
The specific embodiment
In order to explain better the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but they do not form restriction to the present invention.
Embodiment 1
Walking beam heating furnace shown in Fig. 1~3 is at linearize slag device, the heat-resisting steel sheet and plate 2 that comprises the rectangle box-structure of upper opening, be provided with metal anchorage 3 on the inner and outer wall of heat-resisting steel sheet and plate 2, metal anchorage 3 is integrated with the castable refractory moulding by casting; Wherein, castable refractory forms a plurality of funnel shaped feed bins 4 of platoon at the inwall of heat-resisting steel sheet and plate 2, and castable refractory forms high temperature resistant heat insulation layer 1 at the outer wall of heat-resisting steel sheet and plate 2; Be filled with slagging agent in feed bin 4, the bottom of feed bin 4 is provided with the discharging opening 5 of discharging for slagging agent, is provided with the discharging filling 6 that can melt under the second bringing-up section operating temperature of heating furnace in discharging opening 5.
The double-decker that heat-resisting steel sheet and plate 2 is the metal cabinet formula, be cooling water channel 8 in the middle of its interlayer, and the top of heat-resisting steel sheet and plate 2 is provided with the exhaust outlet be connected with cooling water channel 8.Discharging opening 5 be shaped as ellipse, its opening section amasss 5 times into the slagging agent granular size.The water beam sum of the second bringing-up section that the number of feed bin 4 is heating furnace and soaking zone subtracts one.The aperture position of discharging opening 5 is arranged on the second bringing-up section of heating furnace and the Shui Liang middle part of soaking zone.
Embodiment 2
Walking beam heating furnace shown in Fig. 4~6 is at linearize slag device, the heat-resisting steel sheet and plate 2 that comprises the rectangle box-structure of upper opening, be provided with metal anchorage 3 on the inner and outer wall of heat-resisting steel sheet and plate 2, metal anchorage 3 is integrated with the castable refractory moulding by casting; Wherein, castable refractory forms a plurality of funnel shaped feed bins 4 of platoon at the inwall of heat-resisting steel sheet and plate 2, and castable refractory forms high temperature resistant heat insulation layer 1 at the outer wall of heat-resisting steel sheet and plate 2; Be filled with slagging agent in feed bin 4, the bottom of feed bin 4 is provided with the discharging opening 5 of discharging for slagging agent, is provided with the discharging filling 6 that can melt under the second bringing-up section operating temperature of heating furnace in discharging opening 5.
Heat-resisting steel sheet and plate 2 is single layer structure, is laid with water cooling tube 7 around heat-resisting steel sheet and plate 2.Discharging opening 5 be shaped as circle, its opening section amasss 3 times into the slagging agent granular size.The water beam sum of the second bringing-up section that the number of feed bin 4 is heating furnace and soaking zone subtracts one.The aperture position of discharging opening 5 is located at the second bringing-up section of heating furnace and the Shui Liang middle part of soaking zone.
Walking beam heating furnace of the present invention, at the online slagging method of linearize slag device, comprises the following steps:
Change slag device with water cooling structure part will be piled cooling water before charging,, in the interlayer centre of double-deck heat-resisting steel sheet and plate 2, fill cooling water, or the water cooling tube 7 of the heat-resisting steel sheet and plate 2 of single layer structure is filled with cooling water that is.
1) change the slag device graininess slagging agent of packing into outside stove, charge weight of slagging agent is determined according to the quantity of slag that needs in stove to dissolve;
The change slag device that 2) by the heating furnace charging roller table slagging agent will be housed is transported to the feed end of heating furnace, with steel billet is the same, by dress steel machine, packed in heating furnace, and in company with steel billet together in heating furnace stepping move ahead; Change slag device centering in stove and pack into, guarantee that discharging opening 5 is positioned at the second bringing-up section of heating furnace and the Shui Liang middle part of soaking zone; According to need of production, can be with stove interval a plurality ofization slag device of packing into;
3) change the slag device and advance in heating furnace through the preheating section of heating furnace, the first bringing-up section, to the second bringing-up section, the discharging filling 6 of changing the slag device is melted under the second bringing-up section operating temperature, and the slagging agent in feed bin 4 scatters from discharging opening 5;
4) along with changing the slag device, in heating furnace, constantly move ahead, slagging agent is evenly sowed the centre position of furnace bottom, particularly two adjacent upright;
5) the solid-state crust block of furnace bottom contacts with slagging agent, chemical reaction at high temperature occurs, generate the slag phase of low melting point, it is liquid steel slag, because liquid steel slag has good mobility at heating furnace work temperature, by the slag-drip system of furnace bottom, liquid steel slag flows to furnace wall cinder notch place along the domatic furnace bottom and discharges out of the furnace, thereby reaches at the linearize slag.
Change slag device is transported to foundry returns by discharge roller after coming out of the stove and lays end, waits for next time and uses.

Claims (7)

1. the online slagging method of walking beam heating furnace, is characterized in that, comprises the following steps:
1) change the slag device graininess slagging agent of packing into outside stove;
The change slag device that 2) slagging agent will be housed is transported to the feed end of heating furnace, with steel billet, pack in heating furnace, and in company with steel billet together in heating furnace stepping move ahead;
3) change the slag device and advance in heating furnace through the preheating section of heating furnace, the first bringing-up section, to the second bringing-up section, the discharging of changing the slag device is packed under the second bringing-up section operating temperature melts, and slagging agent is scattered from the discharging opening of changing the slag device;
4) along with changing the slag device, in heating furnace, constantly move ahead, slagging agent is evenly sowed the centre position of furnace bottom, particularly two adjacent upright;
5) the solid-state crust block of furnace bottom contacts with slagging agent, and chemical reaction at high temperature occurs, and generates the slag phase of low melting point, i.e. liquid steel slag, and the slag-drip system by furnace bottom discharges out of the furnace, thereby reaches at the linearize slag.
2. one kind for realizing that walking beam heating furnace that the described method of claim 1 designs is at linearize slag device, the heat-resisting steel sheet and plate (2) that comprises the rectangular box-structure of upper opening, it is characterized in that: be provided with metal anchorage (3) on the inner and outer wall of described heat-resisting steel sheet and plate (2), described metal anchorage (3) is integrated with the castable refractory moulding by casting; Wherein, described castable refractory forms a plurality of funnel shaped feed bins of platoon (4) at the inwall of heat-resisting steel sheet and plate (2), and described castable refractory forms high temperature resistant heat insulation layer (1) at the outer wall of heat-resisting steel sheet and plate (2); Described feed bin is filled with slagging agent in (4), and the bottom of described feed bin (4) is provided with the discharging opening (5) of discharging for slagging agent, is provided with the discharging filling (6) that can melt under the second bringing-up section operating temperature of heating furnace in described discharging opening (5).
3. walking beam heating furnace according to claim 2, at linearize slag device, is characterized in that: described heat-resisting steel sheet and plate (2) is single layer structure, is laid with water cooling tube (7) around described heat-resisting steel sheet and plate (2).
4. walking beam heating furnace according to claim 2 is at linearize slag device, it is characterized in that: described heat-resisting steel sheet and plate (2) is the double-decker of metal cabinet formula, in the middle of its interlayer, be cooling water channel (8), the top of described heat-resisting steel sheet and plate (2) is provided with the exhaust outlet be connected with cooling water channel (8).
5. walking beam heating furnace according to claim 2, at linearize slag device, is characterized in that: being shaped as of described discharging opening (5) circular, square or oval in a kind of, its opening section amasss 1~10 times into the slagging agent granular size.
6. walking beam heating furnace according to claim 2, at linearize slag device, is characterized in that: the water beam sum of the second bringing-up section that the number of described feed bin (4) is heating furnace and soaking zone subtracts one.
7. walking beam heating furnace according to claim 2, at linearize slag device, is characterized in that: the aperture position of described discharging opening (5) is arranged on the second bringing-up section of heating furnace and the Shui Liang middle part of soaking zone.
CN201310438328.7A 2013-09-24 2013-09-24 Online slagging method and device of walking-beam furnace CN103471413B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107940986A (en) * 2017-10-24 2018-04-20 芜湖新兴铸管有限责任公司 Steel rolling walking beam furnace

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Publication number Priority date Publication date Assignee Title
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CN2575104Y (en) * 2002-11-01 2003-09-24 济南济钢设计院 Slag water quenching slag pots
CN102252528A (en) * 2011-06-24 2011-11-23 北京首钢国际工程技术有限公司 Liquid slag tapping device and method for high-temperature silicon steel heating furnace
CN202660889U (en) * 2012-05-04 2013-01-09 北京首钢国际工程技术有限公司 Liquid deslagging high-temperature oriented silicon steel walking beam type slab heating furnace

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107940986A (en) * 2017-10-24 2018-04-20 芜湖新兴铸管有限责任公司 Steel rolling walking beam furnace
CN107940986B (en) * 2017-10-24 2019-08-27 芜湖新兴铸管有限责任公司 Steel rolling walking beam furnace

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