CN105441646A - Heat treatment device and method for large steel plate converter shell - Google Patents
Heat treatment device and method for large steel plate converter shell Download PDFInfo
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- CN105441646A CN105441646A CN201510766868.7A CN201510766868A CN105441646A CN 105441646 A CN105441646 A CN 105441646A CN 201510766868 A CN201510766868 A CN 201510766868A CN 105441646 A CN105441646 A CN 105441646A
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- converter
- furnace shell
- steel plate
- heat
- combustion
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
Abstract
The invention discloses a heat treatment device for a large steel plate converter shell. The heat treatment device for the large steel plate converter shell comprises an oil supply system, a combustion system, a temperature measurement control system, a dedusting system, a heat preservation system and a heat treatment protection system. The heat treatment protection system comprises heat insulation materials, a backing ring supporting device and a converter supporting follow-up device. The heat insulation materials are arranged between a converter body and a backing ring. The backing ring supporting device tightly abuts against the backing ring. The converter supporting follow-up device is arranged at a converter mouth. The invention further provides a heat treatment method for the large steel plate converter shell. By the adoption of the heat treatment device and method for the large steel plate converter shell, the assembly precision of the converter shell can be guaranteed, the safety using requirement for a converter can be met, and the cost is relatively low.
Description
Technical field
The present invention relates to technical field of heat treatment, in particular, the present invention relates to a kind of device and method for heat-treating the steel plate furnace shell of mammoth conveter.
Background technology
Mammoth conveter is the key equipment of steelworks, converter shell works under high temperature, heavy duty and the working condition that frequently fascinates, therefore not only bear mechanical force load during furnace shell work, but also subject thermal load, therefore extend its working life for quite crucial steelworks reduces the cost.The factor affecting the converter shell life-span is very many, the material of furnace shell must consider that the freedom from cracking performance of material is to avoid the generation of heat fatigue cracking, the manufacture simultaneously also will being convenient to furnace shell is shaping, and good high temperature thermostrength and creep-resistant property will be had, therefore furnace shell material requires more and more stricter, and alloy content is more and more higher, and welding difficulty also strengthens thereupon, the quality of subsequent heat treatment directly affects mechanical property and the safe application performance of material, is key control element.
Consider that mammoth conveter diameter is generally at more than 8000mm, therefore segmentation manufacture can only be carried out in processing factory, be transported to erecting stage welding and weld seam spot anneling again, due to the impact of spot anneling thermograde, the differing temps region outside annealing region produces gradient stress.Bracing or strutting arrangement welding capacity in addition between converter and backing ring is large, produce welding stress after mounting also greatly corresponding, because converter trunnion ring has formed very large firm body, spot anneling to eliminate stress producing larger thermograde stress to furnace shell, affects precision and the safe handling of furnace shell.As adopted overall electrically heated to anneal, furnace shell weight more than 200 ton, needs the electricity of more than about 2000 kilowatts, and online annealing is on-the-spot can not exist so high electrical capacity, cannot carry out.
Summary of the invention
Embodiment of the present invention technical problem to be solved there are provided a kind of device and method for heat-treating the steel plate furnace shell of mammoth conveter, can ensure the assembly precision of furnace shell and the safe handling requirement of converter, and advantage of lower cost.
A kind of thermal treatment unit for mammoth conveter steel plate furnace shell provided by the present invention, comprising:
Oil supply system, for providing fuel for the thermal treatment of steel plate furnace shell;
Firing system, is installed on the fire door of converter and is connected with oil supply system, for providing combustion conditions for fuel;
Temperature Measure Control System, be arranged in converter, for real-time, the temperature of furnace shell in whole heat treatment process is sampled, and the temperature value obtained sampling carries out this comparatively with the thermal treatment process temperature curve preset, thus control the degree of combustion of fuel by control combustion system;
Dust-removal system, is connected with converter, processes for the flue dust produced in combustion to fuel;
Heat-insulation system, is arranged at the outside surface of converter, carries out isothermal holding for the heat produced fuel combustion in heat treatment process; And
Thermal treatment securing system; comprise lagging material, backing ring suspension device and converter supporting follow-up gear; described lagging material is arranged between converter body and backing ring, and described backing ring suspension device presses closer backing ring and arranges, and described converter supporting follow-up gear is arranged at converter mouth.
Wherein, described oil supply system comprises storage tank and pipeline road.
Wherein, described firing system comprises burner, oil pump, oil nozzle, combustion blower and control device, and described firing system is installed on the fire door of converter.
Wherein, described firing system is connected by counter flange with the perforate on the blind plate being arranged at fire door place, the fuel of described oil supply system is delivered to oil nozzle by oil pump and is atomized, be arranged at combustion blower on burner for combustion-supporting by this air blast of wind oil preset, described control device for control combustion blower wind oil this.
Wherein, described Temperature Measure Control System comprises the some thermopairs be welded on furnace shell and the Monitoring systems connected by connection compensating lead wire, described some thermopairs are for sensing on furnace shell temperature everywhere, and described Monitoring systems is for recording the temperature value that senses and obtain and carrying out calculation process to it.
Wherein, described dust-removal system comprises exhaust smoke hole, dust-removing flue, dedusting fan, final dusting air channel; Described exhaust smoke hole is arranged on the blind plate of fire door, and the side of described dust-removing flue and exhaust smoke hole adopt Flange joint, and opposite side is connected with final dusting air channel, and the flue gas that described dedusting fan is used for firing system produces is drained by dust-removal system final dusting air channel.
Wherein, described heat-insulation system comprises some layers of lagging material, and described some layers of lagging material are interlayer dislocation lap joint.
Wherein, described lagging material adopts pure aluminium silicate needle punched blanket.
Wherein, described heat-insulation system also comprises and is arranged at outermost insulating cotton.
Present invention also offers a kind of heat treating method for mammoth conveter steel plate furnace shell, comprising:
The adjustment burner atomization quantity of firing system and the combustion air volume of combustion blower, by lighter for ignition fire fuel;
The dedusting fan air quantity of adjustment converter, is discharged to secondary BOF dedusting system air channel the black smoke produced in combustion processes by dust-removing flue;
According to the swell increment that furnace shell is heated, adjustment converter supporting follow-up gear, equalizing spring board support stressed, controls bearing local deformaton;
Real-Time Monitoring Temperature Measure Control System, and carry out this comparatively contrast with the heat treatment cycle curve arranged, thus provide concrete fuel oil manipulated variable to firing system;
Heat up and control: the adjustment burner atomization quantity of firing system and the combustion air volume of combustion blower, control converter and heat up in 300-690 DEG C of interval, heat-up rate 50-60 DEG C/per hour, temperature reaches 690 DEG C ± 15 DEG C insulations 3.5 ~ 4.5 hours;
Cooling controls: stop to firing system fuel feeding, the combustion blower air quantity of adjustment firing system, controls converter 690-400 DEG C of interval cooling, speed of cooling 50-80 DEG C/per hour, less than the 400 DEG C machine air blast that turn off the blast, the furnace shell freedom of entry state of cooling; And
According to the shrinkage of furnace shell cooling, adjustment fire door supporting follow-up gear, equalizing spring board support stressed, controls bearing local deformaton.
Further, described heat treating method also comprises: print actual heat treatment curve, after waiting casing temperature to reach envrionment temperature, detects weld hardness value, does thermal effectiveness evaluation.
The above-mentioned thermal treatment unit for mammoth conveter steel plate furnace shell and method, instead of traditional electrically heated localized annealing technique, to the special plate furnace shell that mammoth conveter is selected, as steel alloy, high temperature steel, expand with heat and contract with cold under the detrimentally affect prerequisite of backing ring and converter body support device what ensure to avoid converter thermal treatment to produce, abundant elimination converter assembling and the unrelieved stress of welding, stablize the geometrical dimension of furnace shell and the connection precision with backing ring, the structure property of welding joint and heat affected zone can be improved, reach reduction hardness, improve the object of plasticity and toughness, obnoxious flavour in further release weld seam, prevent the hydrogen embrittlement of weld seam and the generation of crackle.The present invention is applicable to mammoth conveter (210-300 ton) and fully eliminates unrelieved stress, improves weld seam overall quality, ensures setting accuracy and guarantees converter safe handling requirement.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings;
Fig. 1 is the structure iron of the present invention for the better embodiment of the thermal treatment unit of mammoth conveter steel plate furnace shell.
Fig. 2 is the installation steps figure of thermal treatment unit in Fig. 1.
Fig. 3 is the schema of the present invention for the better embodiment of the heat treating method of mammoth conveter steel plate furnace shell.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
First, before embodiment is described, be necessary that some terms to occurring make an explanation herein.Such as:
Use the term such as " first ", " second " to describe various element if occur herein, but these elements should not limited by these terms.These terms are only used for differentiation element and another element.Therefore, " first " element also can be called as " second " element and not depart from instruction of the present invention.
In addition, should be understood that, when mentioning an element " connection " or " connection " to another element, it can directly connect or directly be connected to another element or also can there is intermediary element.On the contrary, when mentioning that an element " directly connection " or " directly connecting " are to another element, then there is not intermediary element.
The various terms occurred in this article are only not intended to as limitation of the invention for describing the object of concrete embodiment.Unless context is clearly pointed out in addition, then singulative intention also comprises plural form.
" comprise " when using term in this manual and/or " including " time, these terms specify the existence of described feature, entirety, step, operation, element and/or parts, but also do not get rid of more than one other features, entirety, step, operation, element, the existence of parts and/or its group and/or additional.
About embodiment:
Please refer to shown in Fig. 1, is the schematic diagram of a kind of thermal treatment unit for mammoth conveter steel plate furnace shell of the present invention.The better embodiment of the described thermal treatment unit for mammoth conveter steel plate furnace shell comprises oil supply system 1, firing system 2, Temperature Measure Control System 3, dust-removal system 5, heat-insulation system 6 and thermal treatment securing system 8.
Described oil supply system 1 is for providing fuel for the thermal treatment of steel plate furnace shell.In present embodiment, heat required in Thermal Synthetic treating processes and cost are considered, described oil supply system 1 comprises storage tank 10 and pipeline road 12, fuel can adopt No. 0 diesel oil, the geometrical dimension and material etc. of heat treated converter steel slab furnace shell carry out thermodynamic metering as required, determine the maximum oil consumption needed for thermal treatment, storage tank 10 oil capacitys should ensure to be more than or equal to oil mass needed for the thermal treatment complete period, and best oil capacity should be 1.2 ~ 1.8 times of oil mass needed for the thermal treatment complete period.Certainly, in other embodiments, other fuel also can be adopted to provide heat required in heat treatment process.
Described firing system 2 is for providing combustion conditions for fuel.In present embodiment, described firing system 2 comprises burner, oil pump, oil nozzle, combustion blower and control device.Described firing system 2 is installed on the fire door of required heat treated converter.During installation, the fire door of converter first utilizes fire door blind plate 20 to seal, and on furnace shell, remaining fabrication hole then can use steel plate to close, and becomes a container closed to make converter.Meanwhile, open a hole in the center of fire door blind plate 20, dock with firing system 2.Described firing system 2 and fire door blind plate 20 can adopt counter flange to connect, No. 0 diesel oil of described oil supply system 1 delivers to the rear ejection of oil nozzle atomization by oil pump, the combustion oil of atomization, lighted by manual ignition's device, fuel oil burns, combustion blower on burner by preset wind oil this air blast combustion-supporting, described control device for control combustion blower wind oil this.
Described Temperature Measure Control System 3 is sampled to the temperature of furnace shell in whole heat treatment process for real-time, and the temperature value obtained sampling carries out this comparatively with the thermal treatment process temperature curve preset, thus the combustion blower of control combustion system 2 regulate its wind oil this, and then control the degree of combustion of fuel oil.Concrete, in present embodiment, described Temperature Measure Control System 3 comprises the some thermopairs 30 be welded on furnace shell and the Monitoring systems 32 connected by connection compensating lead wire.Described Temperature Measure Control System 3 can scan the temperature of a point for measuring temperature and each point for measuring temperature of circling measurment at short notice, and carry out this comparatively contrast with the heat treatment cycle curve arranged, thus provide concrete fuel oil manipulated variable to burner, print the form of a each point temperature simultaneously by processing requirement at interval of for some time, reaffirmed by staff.The distribution of the some thermopairs 30 mentioned in present embodiment in converter, launches at this through calculating no longer in detail according to processing requirement.
Described dust-removal system 5 processes for the flue dust produced in combustion to fuel.In present embodiment, described dust-removal system 5 comprises exhaust smoke hole, dust-removing flue, dedusting fan, final dusting air channel.Described exhaust smoke hole is arranged on the blind plate 20 of fire door, the side of described dust-removing flue and exhaust smoke hole adopt Flange joint, opposite side is connected with final dusting air channel, and the flue gas namely firing system 2 produced by dedusting fan is drained by dust-removal system 5, avoids environment.
Described heat-insulation system 6 carries out isothermal holding for the heat produced fuel combustion in heat treatment process, to avoid the waste of heat.In present embodiment, described heat-insulation system is arranged at the outside surface of furnace shell, and lagging material adopts pure aluminium silicate needle punched blanket.In order to promote heat insulation effect further, three layers of pure aluminium silicate needle punched blanket in present embodiment, can be adopted to carry out interlayer dislocation lap joint.Outermost lagging material then adopts insulating cotton, and insulating cotton adopts steel band, bar for line and iron wire to be fixed.
Described thermal treatment securing system 8 is for avoiding converter in heat treatment process due to the detrimentally affect produced backing ring and converter body support device of expanding with heat and contract with cold.In present embodiment, described thermal treatment securing system 8 comprises the lagging material, backing ring suspension device 81 and the converter supporting follow-up gear 82 that are arranged between converter body and backing ring.Specifically, described backing ring intracontour waterflooding, the gap between converter and backing ring fills up lagging material, avoids heat to the transmission of backing ring body, protection backing ring setting accuracy.Described backing ring suspension device 81 comprises four root posts, and described four root posts hold out against backing ring, and the local additional stress produced of being expanded with heat and contract with cold by furnace shell is born by backing ring pillar, to protect the safety of ball socketed bearing, tilting motor, step-down gear.Described converter supporting follow-up gear 82 comprises four root posts, screw block and cork follow-up gear, described four root posts add is located at converter mouth, divide into screw block and cork follow-up gear, stressed for equalizing spring board support 83, and then bearing local deformaton can be controlled.
Please refer to shown in Fig. 2, carry out brief description by the installation steps of above-mentioned thermal treatment unit below:
Step S1: install thermal treatment securing system 8.Specifically, first furnace shell backing ring is rotated 180 °, make furnace bottom upward, utilize four root posts to hold out against backing ring, the local additional stress produced of being expanded with heat and contract with cold by furnace shell is born by backing ring pillar, the safety of protection ball socketed bearing, tilting motor, step-down gear.Simultaneously add four root posts at converter mouth, divide into screw block and cork follow-up gear, equalizing spring board support stressed, control bearing local deformaton.Backing ring intracontour waterflooding, the gap between converter and backing ring fills up lagging material, avoids heat to the transmission of backing ring body, protection backing ring setting accuracy.
Step S2: install combustion system 2.Specifically, first install fire door blind plate at fire door, position with pores install combustion device, oil pump, combustion blower and control device on fire door blind plate, oil supply system 1 and fire door blind plate adopt counter flange to connect, oil pump is connected with storage tank by pipeline road, to firing system 2 fuel feeding.
Step S3: install Temperature Measure Control System 3.Specifically, first according to geometrical dimension and the processing requirement of furnace shell, spring plate, calculate the distribution plan of thermopair, at furnace shell, the some thermopairs of spring plate place welded and installed, receive in Monitoring systems by connecting compensating lead wire, carry out intelligent measuring to temperature, thus need the burning of control combustion system 2 according to temperature variation, Monitoring systems is arranged on zero meter face.
Step S4: install dust-removal system 5.Specifically, dust-removing flue is installed at the exhaust smoke hole place on fire door blind plate, and is connected with secondary BOF dedusting system air channel, carries out shutoff simultaneously, prevent flue dust excessive to some fabrication holes above furnace shell.
Step S5: install heat-insulation system 6.Specifically, first furnace shell outside surface welding bar for line, lagging material is fixed on bar for line, and lagging material adopts three layers of pure aluminium silicate needle punched blanket, interlayer dislocation lap joint, insulating cotton block iron wire intersect on bar for line take up fixing.Outermost layer insulating cotton uses steel band to reinforce.
Step S6: oil supply system 1 is provided.Specifically, reach secure location by tank wagon 10, and use pipeline road 12 to be connected with firing system 2.
Shown in Fig. 3, the better embodiment that the present invention is used for the heat treating method of mammoth conveter steel plate furnace shell comprises the following steps:
Step S10: the adjustment burner atomization quantity of firing system and the combustion air volume of combustion blower, by lighter for ignition fire fuel, do not control for the heat-up rate of first 300 DEG C.
Step S11: the dedusting fan air quantity of adjustment converter, is discharged to secondary BOF dedusting system air channel the black smoke produced in combustion processes by dust-removing flue.
Step S12: the swell increment of being heated according to furnace shell, adjustment converter supporting follow-up gear, equalizing spring board support stressed, controls bearing local deformaton.
Step S13: Real-Time Monitoring Temperature Measure Control System, and carry out this comparatively contrast with the heat treatment cycle curve arranged, thus provide concrete fuel oil manipulated variable to firing system, print the form of a each point temperature at interval of for some time according to processing requirement simultaneously.
Step S14: heat up and control: the adjustment burner atomization quantity of firing system and the combustion air volume of combustion blower, control converter and heat up in 300-690 DEG C of interval, heat-up rate 50-60 DEG C/per hour, temperature reaches 690 DEG C ± 15 DEG C insulations 4 hours.
Step S15: cooling controls: stop to firing system fuel feeding, the combustion blower air quantity of adjustment firing system, controls converter 690-400 DEG C of interval cooling, speed of cooling 50-80 DEG C/per hour, less than the 400 DEG C machine air blast that turn off the blast, the furnace shell freedom of entry state of cooling.
Step S16: according to the shrinkage of furnace shell cooling, adjustment fire door supporting follow-up gear, equalizing spring board support stressed, controls bearing local deformaton.
Step S17: print actual heat treatment curve, after waiting casing temperature to reach envrionment temperature, detects weld hardness value, does thermal effectiveness evaluation.
The invention has the beneficial effects as follows:
1, for steel-making mammoth conveter (210-300 ton) special plate furnace shell, as steel alloy, high temperature steel, fully can eliminate converter assembling and the unrelieved stress of welding, stablize the geometrical dimension of converter and the connection precision with backing ring, the structure property of welding joint and heat affected zone can be improved, reach reduction hardness, improve the object of plasticity and toughness.
2, provide the furnace shell that a set of effective guarantee avoids converter thermal treatment to produce to expand with heat and contract with cold, dysgenic method is caused to backing ring and converter body support device.
3, the firing system of this thermal treatment unit fully achieves production domesticization, under the prerequisite meeting thermal treatment quality, can this adopt import equipment to save installation cost 1,800,000 yuan.
4, the present invention is applicable to mammoth conveter (210-300 ton), fully can eliminate converter welding residual stress, improve weld seam overall quality, ensure converter setting accuracy and guarantee that it is used safely, being worth promoting the use of at metallurgy industry.
These are only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. for a thermal treatment unit for mammoth conveter steel plate furnace shell, it is characterized in that: described thermal treatment unit comprises:
Oil supply system, for providing fuel for the thermal treatment of steel plate furnace shell;
Firing system, is installed on the fire door of converter and is connected with oil supply system, for providing combustion conditions for fuel;
Temperature Measure Control System, be arranged in converter, for real-time, the temperature of furnace shell in whole heat treatment process is sampled, and the temperature value obtained sampling is compared with the thermal treatment process temperature curve preset, to be controlled the degree of combustion of fuel by control combustion system;
Dust-removal system, is connected with converter, processes for the flue dust produced in combustion to fuel;
Heat-insulation system, is arranged at the outside surface of converter, carries out isothermal holding for the heat produced fuel combustion in heat treatment process; And
Thermal treatment securing system; comprise lagging material, backing ring suspension device and converter supporting follow-up gear; described lagging material is arranged between converter body and backing ring, and described backing ring suspension device presses closer backing ring and arranges, and described converter supporting follow-up gear is arranged at converter mouth.
2., as claimed in claim 1 for the thermal treatment unit of mammoth conveter steel plate furnace shell, it is characterized in that: described oil supply system comprises storage tank and pipeline road.
3., as claimed in claim 1 for the thermal treatment unit of mammoth conveter steel plate furnace shell, it is characterized in that: described firing system comprises burner, oil pump, oil nozzle, combustion blower and control device.
4. as claimed in claim 3 for the thermal treatment unit of mammoth conveter steel plate furnace shell, it is characterized in that: described firing system is connected by counter flange with the perforate on the blind plate being arranged at fire door place, the fuel of described oil supply system is delivered to oil nozzle by oil pump and is atomized, be arranged at combustion blower on burner for combustion-supporting by the Wind-oil ratio air blast preset, described control device is for controlling the Wind-oil ratio of combustion blower.
5. as claimed in claim 1 for the thermal treatment unit of mammoth conveter steel plate furnace shell, it is characterized in that: described Temperature Measure Control System comprises the some thermopairs be welded on furnace shell and the Monitoring systems connected by connection compensating lead wire, described some thermopairs are for sensing on furnace shell temperature everywhere, and described Monitoring systems is for recording the temperature value that senses and obtain and carrying out calculation process to it.
6., as claimed in claim 1 for the thermal treatment unit of mammoth conveter steel plate furnace shell, it is characterized in that: described dust-removal system comprises exhaust smoke hole, dust-removing flue, dedusting fan, final dusting air channel; Described exhaust smoke hole is arranged on the blind plate of fire door, and the side of described dust-removing flue and exhaust smoke hole adopt Flange joint, and opposite side is connected with final dusting air channel, and the flue gas that described dedusting fan is used for firing system produces is drained by dust-removal system final dusting air channel.
7., as claimed in claim 1 for the thermal treatment unit of mammoth conveter steel plate furnace shell, it is characterized in that: described heat-insulation system comprises some layers of lagging material, described some layers of lagging material are interlayer dislocation lap joint.
8. as claimed in claim 7 for the thermal treatment unit of mammoth conveter steel plate furnace shell, it is characterized in that: described lagging material adopts pure aluminium silicate needle punched blanket, described heat-insulation system also comprises and is arranged at outermost insulating cotton.
9. for a heat treating method for mammoth conveter steel plate furnace shell, it is characterized in that: described heat treating method comprises:
The adjustment burner atomization quantity of firing system and the combustion air volume of combustion blower, by lighter for ignition fire fuel;
The dedusting fan air quantity of adjustment converter, is discharged to secondary BOF dedusting system air channel the black smoke produced in combustion processes by dust-removing flue;
According to the swell increment that furnace shell is heated, adjustment converter supporting follow-up gear, equalizing spring board support stressed, controls bearing local deformaton;
Real-Time Monitoring Temperature Measure Control System, and compare and contrast with the heat treatment cycle curve arranged, to provide fuel oil manipulated variable to firing system;
Heat up and control: the adjustment burner atomization quantity of firing system and the combustion air volume of combustion blower, control converter and heat up in 300-690 DEG C of interval, heat-up rate 50-60 DEG C/per hour, temperature reaches 690 DEG C ± 15 DEG C insulations 3.5 ~ 4.5 hours;
Cooling controls: stop to firing system fuel feeding, the combustion blower air quantity of adjustment firing system, controls converter 690-400 DEG C of interval cooling, speed of cooling 50-80 DEG C/per hour, less than the 400 DEG C machine air blast that turn off the blast, the furnace shell freedom of entry state of cooling; And
According to the shrinkage of furnace shell cooling, adjustment fire door supporting follow-up gear, equalizing spring board support stressed, controls bearing local deformaton.
10. as claimed in claim 9 for the heat treating method of mammoth conveter steel plate furnace shell, it is characterized in that: described heat treating method also comprises: print actual heat treatment curve, reach after envrionment temperature until casing temperature, detect weld hardness value, do thermal effectiveness evaluation.
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| CN201510766868.7A CN105441646B (en) | 2015-11-11 | 2015-11-11 | Annealing device and method for mammoth conveter steel plate furnace shell |
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| CN201510766868.7A CN105441646B (en) | 2015-11-11 | 2015-11-11 | Annealing device and method for mammoth conveter steel plate furnace shell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086365A (en) * | 2016-08-22 | 2016-11-09 | 首钢股份公司迁安钢铁公司 | Bulk heat treatmet system changed online by large-scale air stove vault |
| CN107514911A (en) * | 2017-08-30 | 2017-12-26 | 中核四0四有限公司 | A kind of MOX batches sintering furnace synchronous lifting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3567907A (en) * | 1968-04-30 | 1971-03-02 | Babcock & Wilcox Co | Apparatus for heat treating a pressure vessel |
| CN101545031A (en) * | 2009-05-11 | 2009-09-30 | 辽河石油勘探局 | Integral heat-processing method for welded large-size equipment |
| CN101713020A (en) * | 2008-10-08 | 2010-05-26 | 寿比南 | Internal combustion segmental heat treatment method for pressure container |
| CN103667623A (en) * | 2012-09-20 | 2014-03-26 | 攀钢集团工程技术有限公司 | Gas heating device of converter shell and integral annealing method |
-
2015
- 2015-11-11 CN CN201510766868.7A patent/CN105441646B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3567907A (en) * | 1968-04-30 | 1971-03-02 | Babcock & Wilcox Co | Apparatus for heat treating a pressure vessel |
| CN101713020A (en) * | 2008-10-08 | 2010-05-26 | 寿比南 | Internal combustion segmental heat treatment method for pressure container |
| CN101545031A (en) * | 2009-05-11 | 2009-09-30 | 辽河石油勘探局 | Integral heat-processing method for welded large-size equipment |
| CN103667623A (en) * | 2012-09-20 | 2014-03-26 | 攀钢集团工程技术有限公司 | Gas heating device of converter shell and integral annealing method |
Non-Patent Citations (3)
| Title |
|---|
| 刘金谋: "大型转炉炉体炉帽整体退火法", 《冶金设备》 * |
| 戴钦诚: "大型转炉炉壳整体热处理", 《鞍钢技术》 * |
| 李友等: "大型壳体结构的焊后整体热处理", 《东北大学学报(自然科学版)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086365A (en) * | 2016-08-22 | 2016-11-09 | 首钢股份公司迁安钢铁公司 | Bulk heat treatmet system changed online by large-scale air stove vault |
| CN107514911A (en) * | 2017-08-30 | 2017-12-26 | 中核四0四有限公司 | A kind of MOX batches sintering furnace synchronous lifting device |
| CN107514911B (en) * | 2017-08-30 | 2019-08-13 | 中核四0四有限公司 | A kind of MOX batch sintering furnace synchronous lifting device |
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| CN105441646B (en) | 2017-11-28 |
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