CN104894326A - Novel iron alloy baking system and process based on steel refining furnace - Google Patents
Novel iron alloy baking system and process based on steel refining furnace Download PDFInfo
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- CN104894326A CN104894326A CN201510307453.3A CN201510307453A CN104894326A CN 104894326 A CN104894326 A CN 104894326A CN 201510307453 A CN201510307453 A CN 201510307453A CN 104894326 A CN104894326 A CN 104894326A
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Abstract
The invention discloses a novel iron alloy baking system and process based on a steel refining furnace, which are designed because the conventional iron alloy baking process is high in cost. The novel iron alloy baking system and process based on the steel refining furnace comprises a movable concentrating bucket, a concentrating bucket roaster and a concentrating bucket insulation cover device, wherein iron alloys needed by the steel refining furnace are transported to a baking position from a material receiving position in the movable concentrated bucket; the iron alloys are baked to a target temperature by the concentrated bucket roaster; the iron alloys in an aggregate bin are thermally insulated by the concentrating bucket insulation cover device; the iron alloys are transported to a discharging position by the movable concentrated bucket so as to be discharged. The novel iron alloy baking system and process based on the steel refining furnace realize stable supply of high-temperature iron alloys needed by the steel refining furnace for each steelmaking process.
Description
Technical field
The invention belongs to process for making technical field, be specifically related to a kind of Novel iron alloy baking system based on steel melting furnace and technique.
Background technology
Iron and steel is the basic industry of national economy, and under the situation of national economy fast development, China's crude steel output improves constantly in recent years, 2013, and China's crude steel output has reached 7.79 hundred million tons/year, accounts for global crude steel output 48.48%.
Reducing steel-making tapping temperature is reduce one of steel-making raw materials consumption, raising steel melting furnace furnace life, the important channel reducing STEELMAKING PRODUCTION cost.Domestic and international big-and-middle-sized iron and steel enterprise has carried out a large amount of practical studies to reduction tapping temperature and minimizing tapping process temperature drop and (as: has strengthened organization of production, reduces ladle turnover quantity, accelerates ladle turnaround speed, red packet is tapped, heat-insulating shield etc. built by laying bricks or stones by ladle, all obtain certain effect, but the temperature drop of tapping process or bigger than normal, therefore, tapping process now often adopts iron alloy baking process to reduce the tapping temperature of steel melting furnace further.
The object of the required iron alloy baking of steel-making has:
(1) remove moisture, to reduce the gas in steel, ensure steel quality;
(2) make iron alloy be easy to fusing, reduce and absorb heat, shorten steel melting furnace tap to tap time, corresponding raising steel-making output;
(3) prevent cold conditions iron alloy to add in molten steel and produce splash, cause unnecessary iron loss.
Building bakeout oven for ferro-alloy is the conventional means realizing iron alloy quick baking, bakeout oven for ferro-alloy is one of processing unit important in steel-smelting production process, be mainly used in the iron alloy of dry deoxidization iron alloying as ferromanganese, silicomanganese, ferrosilicon, ferrochrome etc., and (in specifically need determining in conjunction with the smelting cycle of steel melting furnace and baking speed, reach design baking target temperature (normal 400 ~ 600 DEG C at certain hour.In addition, bakeout oven for ferro-alloy also has the function of iron alloy bulk material relay storage, turnover.
Bakeout oven for ferro-alloy is generally built in from steel melting furnace comparatively distant positions by domestic and international iron and steel enterprise, after being transported to steel smelting furnace, concentrating and add in ladle in steel melting furnace tapping process after baking by go-cart or fork truck.The roasting mode of conventional iron alloy installs multiple burner in iron alloy high hopper; reached the object of baking by the flame of burner combustion, this roasting mode often there will be burner and more easily puts out a fire and the problem such as iron alloy material and the easy scaling loss of feed bin around combustion flame position.Because the working system of steel melting furnace tapping process iron alloy is for being interrupted, and the bakeout oven for ferro-alloy working system of routine is continuously, working system also exists larger conflict.In addition, the every stove add-on of iron alloy is only 10 ~ 15kg/t steel, bakeout oven for ferro-alloy is then toast continuously for all iron alloy high hoppers (meeting the iron alloy amount needed for the production at least 8 hours of workshop), iron alloy baking is far longer than production aequum, cause iron alloy to toast and there is the waste of a large amount of combustion gas, electric energy etc., technique and all there is certain irrationality economically.
Summary of the invention
For the problems referred to above, the invention provides that one realizes that iron alloy baking is few, combustion gas and power consumption is little, temperature drop is little, achieve the Novel iron alloy baking system based on steel melting furnace and the technique of the stable high temperature iron alloy supply needed for every stove.
For achieving the above object, the present invention is based on the Novel iron alloy baking system of steel melting furnace, comprise portable concentrating and struggle against, concentrate bucket roaster and concentrate bucket insulation cover device, wherein concentrate bucket that iron alloy needed for every for steel melting furnace stove is toasted position by delivering to by material level in described movable type, bucket roaster is concentrated to be baked to target temperature to described iron alloy, iron alloy in described concentrated bucket is incubated by described concentrated bucket insulation cover device, described movable type concentrates bucket to transport described iron alloy to unloading material level, carries out discharging.
Further, described movable type concentrate bucket comprise mobile trolley used, be arranged on described mobile trolley used on concentrated bucket and control the proximity switch group of described mobile trolley used stop position, wherein said proximity switch group comprises by material level proximity switch, baking position proximity switch, unloads material level proximity switch, and described concentrated bucket has the electric gate valve concentrating bucket described in discharging.
Further, described concentrated hopper is formed by Plate Welding, and described hopper inwall is provided with resistance to 800 DEG C of refractory materialss to 1000 DEG C of high temperature.
Further, mobile trolley used translational speed is 0 ~ 20m/min, and described mobile trolley used track two ends are respectively equipped with car stop.
Further, described concentrated bucket roaster comprises fixed support, the lift baking lid be arranged on described fixed support, described baking lid drives lifting by Electrohydraulic push rod, described baking covers and is provided with burner, portable bucket of concentrating moves to below roaster, and described burner concentrates the iron alloy of bucket transport to toast by gas blower mixed firing to described movable type by adopting coke-oven gas or steel melting furnace coal gas or Sweet natural gas or other gas medium.
Further, the lifting travel of described baking lid is 200 ~ 240mm, and the rising or falling speed of described baking lid is 10m/min, the iron alloy of described concentrated bucket roaster baking speed is 40 DEG C/and min ~ 60 DEG C/min.
Further, described concentrated bucket insulation cover device comprises insulation cover and lid and adds and take off device, described lid adds to be taken off device and comprises symmetrically arranged interdigital structure, described insulation cover upper surface is provided with the jack coordinated with described interdigital structure, the side of described insulation cover being met in mobile set the direction of motion that struggles against is provided with the interdigital baffle plate departing from interdigital structure, on described insulation cover two are interdigitally respectively equipped with positive stop, and wherein said positive stop is angle steel;
When moving to steel melting furnace direction when struggling against in mobile set, the interdigital baffle plate on insulation cover and concentrated hopper bump against, then insulation cover departs from described interdigital structure, and insulation cover lid is located at concentrates bucket top, along with concentrated bucket moves together; Fed in raw material when mobile trolley used, when moving in the other direction, described interdigital structure inserts in the jack on insulation cover, and the interdigital positive stop on described interdigital structure and described insulation cover bump against, and described insulation cover departs from concentrates bucket, again rests on described interdigital structure.
Further, the inwall of described insulation cover is provided with refractory materials, and described interdigital baffle plate ~ 300mm is high, and 30mm is thick, and the specification of described angle steel is L100 × 10.
For achieving the above object, the present invention is based on the Novel iron alloy baking technique of steel melting furnace, bucket is concentrated by the iron alloy needed for every for steel melting furnace stove by being transported to baking position by material level by described movable type, by concentrated bucket roaster, target temperature is baked to described iron alloy, iron alloy in described hopper is incubated by described concentrated bucket insulation cover device, described movable type concentrates bucket to transport described iron alloy to unloading material level, carries out discharging.
1. the present invention adopts portable concentrating to struggle against, and meet quantitative iron alloy storage and transport that every bake oven bakes front and back, in addition, whole process realizes remote control, greatly reduces the labour intensity of field personnel.
2. the present invention adopts and concentrates bucket roaster, and only need carry out baking operation to iron alloy needed for every stove, be different from conventional bakeout oven for ferro-alloy, combustion gas, electric energy etc. reduce greatly.
3. the present invention adopts insulation cover and adds and takes off device, has not only effectively delayed the iron alloy rate of temperature fall after toasting, can also reduce the target temperature of baking, thus reduce further combustion gas, electric energy etc. consumption.
Accompanying drawing explanation
Fig. 1 is the Novel iron alloy baking services plan layout drawing that the present invention is based on steel melting furnace;
Fig. 2 is the A-A direction view of Fig. 1;
Fig. 3 is interdigital structure of the present invention and insulation cover orthographic plan;
Fig. 4 is the B-B direction view of Fig. 3.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
The present invention is based on the Novel iron alloy baking system of steel melting furnace, comprise portable concentrating and struggle against, concentrate bucket roaster and concentrate bucket insulation cover device, wherein concentrate bucket by the iron alloy needed for each steel melting furnace by being transported to baking position by material level in described movable type, bucket roaster is concentrated to be baked to target temperature to described iron alloy, iron alloy in described concentrated bucket is incubated by described concentrated bucket insulation cover device, described movable type concentrates bucket to transport described iron alloy to unloading material level, carries out discharging.
Embodiment 1
The present embodiment is based on the Novel iron alloy baking system of steel melting furnace, comprise portable concentrating and struggle against, concentrate bucket roaster and concentrate bucket insulation cover device, wherein concentrate bucket by the iron alloy needed for each steel melting furnace by being transported to baking position by material level in described movable type, bucket roaster is concentrated to be baked to target temperature to described iron alloy, iron alloy in described concentrated bucket is incubated by described concentrated bucket insulation cover device, described movable type concentrates bucket to transport described iron alloy to unloading material level, carries out discharging.
Described movable type concentrates bucket
Portable bucket of concentrating forms: the compositions such as mobile trolley used, concentrated bucket, electric gate valve, proximity switch.
Alloy amount needed for the every stove of steel melting furnace is added by " high hopper-electric vibrating material feeder-weighing cart-electric sector valve " reinforced flow process to be concentrated in bucket.Concentrate bucket body to be formed by Plate Welding, inner lining refractory (high temperature resistant 800 ~ 1000 DEG C), meet iron alloy and remove high temperature requirement (400 ~ 600 DEG C) needed for free-water and crystal water.Concentrated bucket divides into electric gate valve, the discharge operation of the iron alloy material after can toasting above receiver bin.
Concentrated bucket be arranged in mobile trolley used on, mobile trolley usedly driven by motor, proximity switch is arranged in by material level, baking position, unloads material level, mobile trolley used can stably stop between three stations, translational speed: ~ 20m/min.Mobile trolley usedly be provided with car bumper at track two, safe and reliable.
Described concentrated bucket roaster
Roaster is door type structure, and fixed support arranges mobile trolley used track both sides, and baking lid is lift, carries out lift work by Electrohydraulic push rod to baking lid.After concentrating bucket material feeding to terminate, mobile trolley used being moved to by the concentrated bucket that iron alloy is housed below concentrated bucket roaster carries out baking operation.Concentrate the significant parameter of bucket roaster: normal lifting travel: 200mm, maximum lifting travel: 240mm, rising or falling speed: ~ 10m/min.The burner of roaster is arranged in baking and covers, coke-oven gas or steel melting furnace coal gas or Sweet natural gas or other gas mediums and air blast mixed firing is adopted to toast iron alloy, baking speed is different and different according to gas families, flow etc., and normal baking speed control is at 40 DEG C/min ~ 60 DEG C/min.
Described concentrated bucket insulation cover and add and take off device
The frame body concentrating bucket insulation cover is welded-steel plate construction, lid inner side is refractory materials ramming process, the side of insulation cover is provided with ~ 300mm height baffle plate (30mm is thick), both sides are provided with ~ angle steel (L100 × 10 specification) of 100mm, form the both sides positive stop of insulation cover.Add that to take off device be two fixing interdigital structures, steel plate structure, thickness ~ 30mm, connects two fixing interdigital linkers hangings in the below of upper platform beamofframe.
When mobile trolley used run to steel melting furnace direction time, the interdigital baffle plate in side of insulation cover and concentrated bucket are collided, then insulation cover is automatically shelved on concentrates bucket top to be incubated with mobile trolley used operation, and insulation cover departs from and adds that to take off on device fixing interdigital; When mobile trolley used fed in raw material the motion of backward weighing cart direction time, add in the jack above the fixing interdigital insertion insulation cover taken off on device, insulation cover is met interdigital block and departs from mobile trolley used.
Iron alloy charging system in the present embodiment comprises iron alloy high hopper, hand operated gate valve, electric vibrating material feeder, weighing cart, electric sector valve etc.Weighing cart weighs each required various iron alloy materials of steel melting furnace respectively, adopts the metering method of accumulation to gather all alloys.Weighing cart is added after gathering all alloys portable to be concentrated in bucket, mobile trolley used add material after move to below roaster and stop, the baking lid of roaster declines, and roaster starts to carry out baking operation.After baking 10 ~ 15min, baking covers liter, and roaster stops operation, and mobile trolley usedly runs to steel melting furnace direction.When transport through insulation cover and add take off device time, insulation cover is taken off device and is departed from adding, and insulation cover drops on concentrates bucket top, with mobile trolley used synchronous operation to the top of hopper, stopping.When steel melting furnace is tapped, concentrated bucket opens electric gate valve, and add in hopper by the iron alloy material after baking, material is added swivel chute by hopper subsequently, and swivel chute the most at last iron alloy material direct motion adds in ladle.
Concentrate after in bucket the whole discharging of iron alloy material terminates, mobile trolley usedly to move to iron alloy charging system direction, when through insulation cover and add and take off device, insulation cover takes off device by fixing interdigital and automatically connect with adding, and insulation cover leaves portable concentrating and struggles against.Mobile trolley usedly to move on, move to ferroalloy weigh dolly and unload material level when namely concentrating bucket by material level, stop.
The present embodiment also carries out conventional iron alloy by the mode of " weighing cart-gather bucket-fork truck-hopper-swivel chute " and adds ladle operation.
Adopt the present invention to reduce combustion gas (by coal gas of converter) and consume nearly 60%, reduce power consumption nearly 50%, considerably reduce production run cost, improve economic benefit.
Principle of work: alloy needed for every for steel melting furnace stove to be added in mobile set in bucket by iron alloy charging system, mobile trolley used employing motor drives, mobile trolley used transportation establishes three working positions altogether: by material level, baking position, unload material level, the location of stopping position is controlled by proximity switch.When mobile trolley used move to baking position time, mobile trolley used stopping, roaster toasts iron alloy in concentrated bucket, baking arrive target temperature (after 400 ~ 600 DEG C, roaster stop heating.Mobile trolley used continuation is to unloading the motion of material level direction, and in moving process, the interdigital baffle plate of insulation cover is departed from interdigital structure by concentrating bucket to order about, and realizes it and automatically adds a cover.When material level is unloaded in mobile trolley used arrival, reinforced employing flow process after ferroalloy furnace: concentrate bucket-hopper-swivel chute-ladle.In mobile trolley used return course, insulation cover stops by interdigital structure block, thus realizes its automatic open.Mobile trolley used when moving to by material level, stop.
Working process: before tapping, places after ladle 9 walks to steel melting furnace 1 stove with the buggy ladle 8 containing slag device 7 and stops.Iron alloy material loading adopts crane 16 handling mode to add in iron alloy high hopper 14, and needed for every stove steel, the kind of iron alloy and weight, weighed by weighing cart 13, stored, finally move to and unload material level.Now, be placed with concentrated bucket 6 mobile trolley used 5 have moved to immediately below weighing cart, iron alloy material unloads to concentrated bucket 6 by weighing cart 13, mobile trolley used 5 move to steel melting furnace 1 direction, when it moves to roaster 11 position, stop, lift baking lid 12 declines, and is covered by concentrated the suitable for reading of bucket 6, simultaneously, roaster 11 is lighted a fire and is toasted operation, after 10 ~ 15min, concentrate more than iron alloy raised temperature to 400 in bucket 6 DEG C, roaster stops, lift baking lid 12 rises, and mobile trolley used 5 output.When mobile trolley used 5 move to interdigital structure body 24 and insulation cover 4, bucket 6 is concentrated to contact with interdigital baffle plate 21 and positive stop 22, mobile trolley used 5 drive interdigital baffle plate 21 that insulation cover 4 is departed from interdigital structure body 24 from jack 23, and insulation cover 4 covers above concentrated bucket 6 and is incubated.When mobile trolley used 5 move to hopper 2, stop.Open the electric gate valve I 17 of concentrated bucket 5, through slide carriage 3, iron alloy material is discharged into hopper 2, material is discharged into swivel chute 18 by hopper 2, and finally adds in ladle 9.After in concentrated bucket 6, the discharging of iron alloy material terminates, mobile trolley used 5 return from unloading material level to by material level, when mobile trolley used 5 through interdigital structure body 24, the jack 23 of insulation cover 4 is stopped by interdigital block 25, thus achieve insulation cover 4 take off lid operation, finally, mobile trolley used 5 be parked in and unload material level by material level and weighing cart 13.
In addition, when iron alloy baking facility breaks down or needs equipment to carry out repair and maintenance, conventional iron alloy feed way can still be adopted.Working process: by weighing cart 13 iron alloy material needed for every stove is discharged into and gathers in bucket 19, open electric gate valve II 20 and just material can be discharged into fork truck 15, pass through fork truck 15 again by material transfer to hopper 2, iron alloy material is discharged into swivel chute by hopper, and finally adds in ladle 9.
Iron alloy needed for every stove is quantitatively toasted by portable bucket of concentrating by the present embodiment, by above online for iron alloy heat insulation transportation to iron alloy hopper after baking terminates, then is added in ladle by high temperature iron alloy by swivel chute.Whole process iron alloy baking is few, combustion gas and power consumption is little, temperature drop is little, achieves qualified, the stable high temperature iron alloy supply needed for every stove, reduce further the tapping temperature of steel melting furnace, provides new approaches for steel-making realizes cost efficiency.
Embodiment 2
The present embodiment is based on the Novel iron alloy baking technique of steel melting furnace, this technique is realized by the system described in above-described embodiment 1, bucket is concentrated by the iron alloy needed for each steel melting furnace by being transported to baking position by material level by described movable type, by concentrated bucket roaster, target temperature is baked to described iron alloy, iron alloy in described hopper is incubated by described concentrated bucket insulation cover device, described movable type concentrates bucket to transport described iron alloy to unloading material level, carries out discharging.
1. the present invention adopts portable concentrating to struggle against, the iron alloy meeting every stove stores and transport, whole process can realize remote control, greatly reduce the labour intensity of field staff, adopt portable bucket of concentrating to store and hauling operation iron alloy needed for the every stove of steel melting furnace, be different from conventional iron alloy baking process completely.
2. the present invention adopts roaster only to carry out baking operation to iron alloy needed for every stove (namely concentrating iron alloy in bucket), and be different from the bakeout oven for ferro-alloy of routine, combustion gas, electric energy etc. reduce greatly;
3. the present invention adopts insulation cover and adds and takes off device, avoids the cooling of the iron alloy radiation heat release after baking, has effectively delayed the iron alloy rate of temperature fall after toasting, reduce further the consumption of combustion gas, electric energy etc.;
4. the present invention also retains the normal-temperature iron alloy charging technology of steelshop routine, meets roaster, the portable concentrated normal need of production struggled against when breaking down or overhaul, has higher flexibility ratio.
The present invention has the advantages that investment is low, rational technology, running cost are low, simultaneously, also retains the normal-temperature iron alloy charging technology of steelshop routine, solve the difficult problem that many iron and steel enterprises instantly realize low cost, efficient iron alloy baking process well, to be worth in STEELMAKING PRODUCTION field in addition emphasis promotion and application.
Above; be only preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should define with claim is as the criterion.
Claims (9)
1. the Novel iron alloy baking system based on steel melting furnace, it is characterized in that: comprise portable concentrating and struggle against, concentrate bucket roaster and concentrate bucket insulation cover device, wherein concentrate bucket that iron alloy needed for every for steel melting furnace stove is toasted position by delivering to by material level in described movable type, bucket roaster is concentrated to be baked to target temperature to described iron alloy, iron alloy in described concentrated bucket is incubated by described concentrated bucket insulation cover device, described movable type concentrates bucket to transport described iron alloy to unloading material level, carries out discharging.
2. the Novel iron alloy baking system based on steel melting furnace according to claim 1, it is characterized in that: described movable type concentrate bucket comprise mobile trolley used, be arranged on described mobile trolley used on concentrated bucket and control the proximity switch group of described mobile trolley used stop position, wherein said proximity switch group comprises by material level proximity switch, baking position proximity switch, unloads material level proximity switch, and described concentrated bucket has the electric gate valve concentrating bucket described in discharging.
3. the Novel iron alloy baking system based on steel melting furnace according to claim 2, is characterized in that: described concentrated hopper is formed by Plate Welding, and described hopper inwall is provided with resistance to 800 DEG C of refractory materialss to 1000 DEG C of high temperature.
4. the Novel iron alloy baking system based on steel melting furnace according to claim 2, is characterized in that: mobile trolley used translational speed is 0 ~ 20m/min, and described mobile trolley used track two ends are respectively equipped with car stop.
5. the Novel iron alloy baking system based on steel melting furnace according to claim 1, it is characterized in that: described concentrated bucket roaster comprises fixed support, the lift baking lid be arranged on described fixed support, described baking lid drives lifting by Electrohydraulic push rod, described baking covers and is provided with burner, portable bucket of concentrating moves to below roaster, and described burner concentrates the iron alloy of bucket transport to toast by gas blower mixed firing to described movable type by adopting coke-oven gas or steel melting furnace coal gas or Sweet natural gas or other gas medium.
6. the Novel iron alloy baking system based on steel melting furnace according to claim 5, it is characterized in that: the lifting travel of described baking lid is 200 ~ 240mm, the rising or falling speed of described baking lid is 10m/min, the iron alloy of described concentrated bucket roaster baking speed is 40 DEG C/and min ~ 60 DEG C/min.
7. the Novel iron alloy baking system based on steel melting furnace according to claim 2, it is characterized in that: described concentrated bucket insulation cover device comprises insulation cover and lid and adds and take off device, described lid adds to be taken off device and comprises symmetrically arranged interdigital structure, described insulation cover upper surface is provided with the jack coordinated with described interdigital structure, the side of described insulation cover being met in mobile set the direction of motion that struggles against is provided with the interdigital baffle plate departing from interdigital structure, on described insulation cover two are interdigitally respectively equipped with positive stop, and wherein said positive stop is angle steel;
When moving to steel melting furnace direction when struggling against in mobile set, the interdigital baffle plate on insulation cover and concentrated hopper bump against, then insulation cover departs from described interdigital structure, and insulation cover lid is located at concentrates bucket top, along with concentrated bucket moves together; Fed in raw material when mobile trolley used, when moving in the other direction, described interdigital structure inserts in the jack on insulation cover, and the interdigital positive stop on described interdigital structure and described insulation cover bump against, and described insulation cover departs from concentrates bucket, again rests on described interdigital structure.
8. the Novel iron alloy baking system based on steel melting furnace according to claim 7, is characterized in that: the inwall of described insulation cover is provided with refractory materials, and described interdigital baffle plate ~ 300mm is high, and 30mm is thick, and the specification of described angle steel is L100 × 10.
9. the Novel iron alloy baking technique based on steel melting furnace, it is characterized in that: concentrate bucket by the iron alloy needed for every for steel melting furnace stove by being transported to baking position by material level by described movable type, by concentrated bucket roaster, target temperature is baked to described iron alloy, iron alloy in described hopper is incubated by described concentrated bucket insulation cover device, described movable type concentrates bucket to transport described iron alloy to unloading material level, carries out discharging.
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| CN103361557A (en) * | 2012-03-28 | 2013-10-23 | 唐山前进钢铁集团有限公司 | High-toughness spring steel and preparation method thereof |
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