CN115007844A - Blast furnace iron receiving method for preheating scrap steel of hot metal ladle - Google Patents
Blast furnace iron receiving method for preheating scrap steel of hot metal ladle Download PDFInfo
- Publication number
- CN115007844A CN115007844A CN202210540845.4A CN202210540845A CN115007844A CN 115007844 A CN115007844 A CN 115007844A CN 202210540845 A CN202210540845 A CN 202210540845A CN 115007844 A CN115007844 A CN 115007844A
- Authority
- CN
- China
- Prior art keywords
- iron
- baking
- hot metal
- blast furnace
- scrap steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 378
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 189
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 105
- 239000010959 steel Substances 0.000 title claims abstract description 105
- 239000002184 metal Substances 0.000 title claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010079 rubber tapping Methods 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims description 30
- 239000000779 smoke Substances 0.000 claims description 13
- 238000009529 body temperature measurement Methods 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000013519 translation Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 19
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000003137 locomotive effect Effects 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 14
- 239000002893 slag Substances 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 241000196324 Embryophyta Species 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000003723 Smelting Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/12—Travelling ladles or similar containers; Cars for ladles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
- B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a blast furnace iron receiving method for preheating scrap steel in a hot metal ladle, which belongs to the technical field of blast furnace iron making and comprises the following steps: waste steel is filled into the hot metal ladle, is transported to the lower part of a blast furnace platform by a train and is roasted at a roasting position; the method comprises the steps of drawing a roasted hot metal tank to a receiving position through a hot metal bulldog to receive iron, continuously receiving iron through the movement of a swinging chute after the iron receiving is finished, fully utilizing the high temperature of molten iron during the tapping of a blast furnace and the high position of a tapping hole, heating high-temperature scrap steel in the hot metal tank without extra work, having high efficiency and low cost, adopting a near online roasting mode, arranging a scrap steel roasting position at a position which is one train away from each receiving position, preheating the scrap steel at the roasting positions A11 and A21 when the receiving positions A1 and A2 receive the molten iron, pushing the roasted scrap steel tank at the A11 position to A1 by a locomotive when the iron receiving of the hot metal tank at the A1 position is finished, operating the same way at the A21 position, sequentially carrying out the operations, immediately receiving iron after the roasting, having less oxidation and less heat loss.
Description
Technical Field
The invention belongs to the technical field of blast furnace iron making, and particularly relates to a blast furnace iron receiving method for preheating scrap steel in a hot metal ladle.
Background
The scrap steel is an excellent renewable resource, the quality of the scrap steel is superior to that of a primary resource, the scrap steel can be recycled in theory, if the scrap steel is taken as an energy-carrying resource, a large amount of energy and water resources can be saved by using the scrap steel for steelmaking, and the discharge of waste water, waste gas and waste residues can be greatly reduced. The gradual reduction of the iron ore proportion and the increase of the scrap steel usage proportion are inevitable trends in the development of the iron and steel industry.
In the prior art, an operating method for baking steel scrap in a converter furnace with application number CN202011198171.1 and a coal oxygen lance for baking steel scrap in a converter furnace with attached new patent application number CN202022420656.2 have common characteristics described: firstly, moving a coal-oxygen lance to a working position, igniting at a position of an open flame at an oxygen lance port, and then descending to a waiting position; secondly, adding the scrap steel of the material tank into the converter, shaking the converter back and forth for 3-5 times to ensure that the scrap steel is uniformly distributed, shaking the converter right, and adjusting the opening degrees of coal gas and oxygen to specified parameters; thirdly, judging that the flame is normal, lowering the lance position to a certain value, performing lance pressing operation according to the sound of impacting scrap steel, and quickly lowering the oxygen lance to a certain value (relative height) after a specified time; fourthly, lifting the gun after the baking time is up, closing oxygen after the baking is finished, and then closing coal gas; fifthly, opening nitrogen, purging for 2 minutes, and then closing a nitrogen valve; sixthly, normally adding iron for smelting after the baking of the scrap steel is finished, and normally splashing slag after the smelting is finished; and seventhly, after slag splashing is finished, moving the coal-oxygen gun to a working position, repeating ignition, waiting for gun discharging, baking by adding scrap steel, lifting the gun, shutting down the fire and moving the gun. The method utilizes the coal gas to heat the scrap steel in the converter in advance, the theory is feasible, and the biggest defect is that the smelting period of the converter is prolonged, and the efficiency of the converter is reduced; secondly, because of the limit of smelting period, the baking time is necessarily limited, and the baking temperature and the baking amount of the scrap steel are also limited.
In the prior art, a device for preheating scrap steel on line in a hot metal ladle with application number CN201921810043.0 is characterized in that: the one end of cantilever beam and rocking arm is passed through the round pin hub and is rotated the connection and toast on the support, and the other end and the piston rod of angle of elevation drive pneumatic cylinder of rocking arm are connected, and carbonization rice husk storage cylinder and molten iron cover are fixed respectively on the cantilever beam, and the hot metal bottle is covered and is equipped with nozzle and charge door, and the nozzle is connected with gas pipeline. The utility model discloses an utilize the idle latency of hot-metal bottle to toast the heating to the steel scrap in the hot-metal bottle to spray the carbonization rice husk to the steel scrap surface after the steel scrap heating is accomplished and keep warm to preheating the back steel scrap, increase the converter heat source. This scheme is because reasons such as railway allocation and transportation, often can not in time connect the iron after toasting, need wait for, will have temperature loss.
In the prior art, a movable device for preheating scrap steel with application number of cn201921756432.x is characterized in that: a slag tank car is arranged on the inner rail), a slag tank is arranged on the slag tank car, an outer rail is arranged on the outer side of the inner rail in parallel, a moving frame is arranged on the outer rail, and a preheating chamber is arranged at the top of the moving frame; the slag tank car is positioned under the movable frame. The invention utilizes the moving rack to carry the preheating chamber, the waste steel is placed in the preheating chamber, when the moving rack and the slag tank car move simultaneously, the heat of the slag in the slag tank car is fully utilized to preheat the waste steel, the slag striding crown block is utilized to add the waste steel into the preheating chamber, and the preheated waste steel is directly added into the steel ladle through the tilting device without being transported backwards again. The method utilizes the heat of the converter slag to preheat the waste steel, but because the heat of the converter slag is limited, the waste steel is preheated by the heat radiation in the air, the heating temperature is limited, and the waste steel is added into the steel ladle after the converter, thereby forming certain threat to the variety and the quality.
In the prior art, the smelting method for improving the scrap steel ratio by preheating the scrap steel in an iron ladle through an oxygen combustion gun with the application number of CN201910796847.8 is characterized in that: s1: charging: filling scrap steel into the empty iron ladle after the molten iron is added, and controlling the loading amount of the scrap steel to be 4-8% of the tapping amount of the converter; s2, preheating scrap steel: heating the empty iron ladle filled with the scrap steel for 3 minutes, and controlling the temperature of the scrap steel in the heated iron ladle to be 500-700 ℃; s3, charging molten iron: molten iron is charged into the heated iron ladle, and the charging amount of the molten iron is 750kg per ton of steel; and S4, adding into a converter: adding scrap steel into a converter, wherein the charging amount of the scrap steel is 20% of the tapping amount of the converter, and then adding molten iron and the scrap steel in the iron ladle into the converter; s5, adding nut coke and blowing: before the converter is started to blow, the coke dices are added at one time through a storage bin, and the adding amount of the coke dices is controlled to be 0-10kg/t according to the temperature of molten iron and the silicon content. When the method is used for adding the molten iron folded tank into a molten iron tank filled with preheated scrap steel, the unnecessary temperature loss of the molten iron is 30-50 ℃.
In the prior art, various means such as a steel ladle, a waste steel tank, a rotary kiln, a box furnace, a hot metal ladle and the like are utilized to bake waste steel so as to achieve the purpose of increasing the waste steel ratio. However, these methods are mostly used around the converter before and after steel making, and the blast furnace tapping has high temperature, high tapping channel position and large falling potential energy, and can form good stirring effect on the scrap steel in the molten iron tank. However, the operation mode of the blast furnace that the tapping time is long and the empty can is continuously replenished is a rare example of the mode that the blast furnace utilizes the hot metal ladle to bake the scrap steel on line, receive the molten iron on line and replenish the hot scrap steel ladle filled with the scrap steel.
In order to fully utilize the process advantage, the invention provides a blast furnace iron receiving method for preheating scrap steel in a molten iron tank.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides a blast furnace iron receiving method for preheating scrap steel in a molten iron tank.
The purpose of the invention can be realized by the following technical scheme:
a blast furnace iron receiving method for preheating scrap steel of a hot metal ladle comprises the following steps:
filling scrap steel into the molten iron tank, conveying the scrap steel to the lower part of a blast furnace platform by a train, baking the scrap steel for 18-20min at a baking position, and carrying out infrared temperature measurement after baking; the hot metal bottle that will toast pulls to receiving the iron position through the swage and connects iron, connects after the iron, continues receiving iron through the motion of swing chute, can, toast the position and receive the iron position to be located the same side track of blast furnace, wherein toast the position including toasting the equipment.
Further, the loading amount of the scrap steel in the hot metal ladle is 15-25t, and the flow rate of the mixed gas in the roasting spray gun is 3000-3600Nm in the roasting process 3 /h。
Furthermore, the baking equipment is located above the train track platform and moves above the train track through the translation track, the train track is provided with the iron bulls which are used for drawing the train box body to move, and the train track is provided with the swing chute above.
Further, the baking equipment comprises a heat shield, an outer smoke hood and a baking spray gun, the heat shield and the baking spray gun are both located at the upper end of the hot metal bottle, the upper end of the heat shield is fixedly provided with the outer smoke hood, the top end of the outer smoke hood is communicated with a flue through a connecting pipe, the outer smoke hood is detachably connected with the flue, one end of the baking spray gun sequentially penetrates through the top end of the outer smoke hood and extends to the outside of the heat shield, the other end of the baking spray gun is communicated with a conveying pipe through a flange plate, the baking spray gun is detachably connected with the conveying pipe, and the lowest point of the baking spray gun has a distance of 300-plus 400mm from the hot metal bottle.
Further, the blast furnace is provided with A, B, C, D total four iron outlets along the clockwise direction, eight iron receiving positions, two baking positions are arranged at the position of one train away from each iron receiving position, the A iron outlet comprises an A1 iron receiving position, an A2 iron receiving position, an A11 baking position and an A21 baking position, the B iron outlet comprises a B1 iron receiving position, a B2 iron receiving position, a B11 baking position and a B21 baking position, the C iron outlet comprises a C1 iron receiving position, a C2 iron receiving position, a C11 baking position and a C21 baking position, and the D iron outlet comprises a D1 iron receiving position, a D2 iron receiving position, a D11 baking position and a D21 baking position.
The invention has the beneficial effects that:
1. the method fully utilizes the high temperature of molten iron, the high position of a tap hole and the large potential energy when the blast furnace is tapped, heats the high-temperature scrap steel in the molten iron tank, does not need extra work, and has high efficiency and low cost;
2. the method adopts a near-on-line baking mode, a scrap baking position is arranged at a position which is one train away from each iron receiving position, when the iron receiving positions A1 and A2 receive molten iron, the baking positions A11 and A21 preheat the scrap, when the iron receiving position A1 finishes the iron receiving of a molten iron tank, the locomotive pushes the baked scrap at the position A11 to the position A1, and the operation is carried out at the position A21 in the same way, and the steps are carried out in sequence, the iron is received immediately after the baking, the waiting time is not needed, the oxidation is less, and the heat loss is less;
3. when A, C groups of iron tapping are performed alternately, the molten iron tank with the position B, D for preheating the scrap steel can be used as a supplement tank to fill the next iron receiving, so that the working efficiency is improved;
4. the distance between the lowest point of the spray gun and the molten iron tank is accurately controlled, when a train freely pushes the molten iron tank, the tank edge is not collided, the tail gas is also ensured to be discharged outwards, and the distance can play a certain heat preservation role during baking;
5. the baking equipment adopts a modular design, integrates a double-layer smoke hood and a spray gun, can block high-temperature flame during baking by a heat insulation cover, and collects baking high-temperature tail gas and partial hot air by an outer smoke hood on a heat insulation plate;
in conclusion, compared with the prior art, the blast furnace iron receiving method has the advantages of less heat loss, full melting of scrap steel, convenient production organization and low cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a scene of a blast furnace iron-receiving method for preheating scrap steel of a hot metal ladle according to the present invention;
fig. 2 is a scene diagram of the baking position.
In the drawings, the components represented by the respective reference numerals are listed below:
11. a pig iron; 12. translating the rail; 13. swinging the chute; 14. a blast furnace; 15. a heat shield; 16. An outer smoke hood; 17. baking the spray gun; 18. a delivery pipe; 19. a flue; 20. a hot-metal ladle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the preheating and baking position includes a hot metal ladle 20 and a baking device, the baking device includes a heat shield 15, an outer hood 16 and a baking spray gun 17, the heat shield 15 and the baking spray gun 17 are both located at the upper end of the hot metal ladle 20, the heat shield 15 blocks high temperature flame during baking, the upper end of the heat shield 15 is fixedly provided with the outer hood 16, the top end of the outer hood 16 is communicated with a flue 19 through a connecting pipe, the outer hood 16 collects baking high temperature tail gas and partial hot air and enters the flue 19 through a bent pipe, the outer hood 16 is detachably connected with the flue 19, the flue 19 transports the baking high temperature tail gas and partial hot air to a waste heat recycling device, one end of the baking spray gun 17 sequentially penetrates through the top end of the outer hood 16 and the top end of the heat shield 15 to extend to the outside of the heat shield 15, the other end of the baking spray gun 17 is communicated with a delivery pipe 18 through a flange, and the baking spray gun 17 is detachably connected with the delivery pipe 18, the lowest point of the baking spray gun 17 is at a distance of 300-400mm from the molten iron tank 20, and the baking spray gun 17 sprays mixed gas of gas and oxygen into the molten iron tank 20 to bake the scrap steel.
The baking equipment is positioned above a train track platform and moves above the train track through a translation track 12, the train track is provided with a pig iron 11, the pig iron 11 is used for drawing a train carriage body to move, a swing chute 13 is arranged above the train track, the swing chute 13 distributes molten iron in a blast furnace 14 to a required position, the blast furnace 14 is provided with A, B, C, D four tapholes in total along the clockwise direction, eight tapholes are arranged, two baking positions are arranged at a position which is one train away from each taphole, the A taphole comprises an A1 taphole position, an A2 taphole position, an A11 baking position and an A21 baking position, the B taphole comprises a B1 taphole position, the device comprises a B2 iron receiving position, a B11 baking position and a B21 baking position, a C tapping hole comprises a C1 iron receiving position, a C2 iron receiving position, a C11 baking position and a C21 baking position, and a D tapping hole comprises a D1 iron receiving position, a D2 iron receiving position, a D11 baking position and a D21 baking position.
Example 1
A blast furnace iron receiving method for preheating scrap steel of a hot metal ladle comprises the following steps:
firstly, loading 15t of scrap steel into a hot metal ladle 20, baking for 18min at a baking position A11, mixing gas flow in a baking spray gun 17 at 3000Nm3/h, wherein the distance from the lowest point of the baking spray gun 17 to the hot metal ladle 20 is 300mm, and carrying out infrared temperature measurement on 1130 ℃ after baking;
secondly, the train with the molten iron tank 20 is pulled to an A1 iron receiving position through the iron buller 11, 18min of iron tapping is finished, the swing chute 13 swings to the A2 iron receiving position to continue iron tapping, the train pushes the molten iron tank 20 baked with the scrap steel at the A21 baking position to the A2 iron receiving position, and after the molten iron tank 20 at the A2 iron receiving position is finished, the swing chute 13 swings back to the A1 iron receiving position to continue iron receiving;
thirdly, when the swing chute 13 discharges iron at the iron receiving position A1, the locomotive pushes the molten iron tank 20 with baked scrap steel at the baking position A21 to the iron receiving position A2, and the steps are sequentially carried out;
fourthly, dragging 2 tanks of molten iron for each stocked iron receiving position A1 or A2 to a steel plant by a train, baking the waste steel water tanks 2018min at a baking position B11, carrying out infrared temperature measurement at 1100 ℃, then dragging the waste steel water tanks to an iron receiving position B1 by the train to wait for iron receiving, and carrying out heat preservation baking at a baking position B11 during waiting, wherein the gas flow is controlled at 300Nm 3/h; the hot metal ladle 20 leaves the iron works for 25min, and then the temperature of the hot metal is measured in the steel works, and the average value is 1370 ℃.
Example 2
A blast furnace iron receiving method for preheating scrap steel of a hot metal ladle comprises the following steps:
firstly, loading 25t of scrap steel into a molten iron tank 20, baking for 20min at a baking position B11, wherein the mixed gas flow in a baking spray gun 17 is 3200Nm3/h, the distance from the lowest point of the baking spray gun 17 to the molten iron tank 20 is 350mm, and after baking, carrying out infrared temperature measurement on 1210 ℃;
secondly, the train with the molten iron tank 20 is pulled to a B1 iron receiving position through the iron buller 11, the iron tapping is finished for 16min, the swing chute 13 swings to the B2 iron receiving position to continue the iron tapping, the train pushes the molten iron tank 20 baked with the waste steel at the B21 baking position to the B2 iron receiving position, and after the iron receiving of the molten iron tank 20 at the B2 iron receiving position is finished, the swing chute 13 swings back to the B1 iron receiving position to continue the iron receiving;
thirdly, when the swing chute 13 discharges iron at the iron receiving position B1, the locomotive pushes the molten iron tank 20 with baked scrap steel at the baking position B21 to the iron receiving position B2, and the steps are sequentially carried out;
and fourthly, dragging 3 tanks of molten iron accumulated at the iron receiving position B1 or the iron receiving position B2 to a steel plant by a train, baking the waste steel and iron water tank 2025min at the baking position A11, measuring the infrared temperature by 1250 ℃, then dragging the waste steel and iron tank to the iron receiving position A1 by the train to wait for iron receiving, performing heat preservation baking at the baking position A11 during waiting, controlling the gas flow at 400Nm3/h, and measuring the temperature of the molten iron in the steel plant by 1365 ℃ after the molten iron tank leaves the steel plant for 20 min.
Example 3
A blast furnace iron receiving method for preheating scrap steel of a hot metal ladle comprises the following steps:
firstly, filling 20t of scrap steel into a molten iron tank 20, baking for 20min at a baking position of C11, wherein the flow rate of mixed gas in a baking spray gun 17 is 3600Nm3/h, the distance from the lowest point of the baking spray gun 17 to the molten iron tank 20 is 400mm, and after baking, carrying out infrared temperature measurement on 1360 ℃;
secondly, the train with the molten iron tank 20 is pulled to a C1 iron receiving position through the iron buller 11, the iron tapping is finished for 16min, the swing chute pendulum 13 continues to tap iron to a C2 iron receiving position, the train pushes the molten iron tank 20 baked with the waste steel at the C11 baking position to a C2 iron receiving position, and after the iron receiving of the molten iron tank 20 at the C2 iron receiving position is finished, the swing chute 13 swings back to the C1 iron receiving position to continue to receive iron;
thirdly, when the swing chute 13 discharges iron at the iron receiving position C1, the locomotive pushes the hot metal ladle 20 roasted by the scrap steel at the roasting position C21 to the iron receiving position C2, and the steps are sequentially carried out;
and fourthly, dragging 3 tanks of molten iron accumulated at each iron receiving position C1 or C2 to a steel plant by a train, baking the waste steel water tank 2018min at a D11 baking position, carrying out infrared temperature measurement of 1320 ℃, then dragging to a D1 iron receiving position by the train to wait for iron receiving, carrying out heat preservation baking at a D11 baking position during waiting, controlling the gas flow at 500Nm3/h, and carrying out molten iron temperature measurement at the steel plant after the molten iron tank leaves the steel plant for 20min, wherein the temperature of the molten iron is 1365 ℃.
The working principle of the invention is as follows:
after the scrap is loaded into the ladle 20, it is transported by train to below the platform of the blast furnace 14. When the swing chute 13 is started to discharge iron at the iron receiving positions A1 and A2 (the swing chute is parallel to two positions of two railways), the blast furnace 14 is transported to the baking position A11 and the baking position A21 through the iron bullion 11 to preheat the scrap steel, when the iron receiving position A1 of the hot metal ladle 20 is completely connected with iron, the hot metal ladle 20 baked by A11 is pushed to the iron receiving position A1 by a train, and the operation is carried out in the same way at the iron receiving position A2 and the baking position A21 in sequence; preheating the hot metal ladle 20 of the scrap steel at other baking positions (B11 baking position, B21 baking position, C11 baking position, C21 baking position, D11 baking position and D21 baking position) which do not produce iron, and filling the preheated hot metal ladle as a supplement tank to the next iron receiving; eight iron receiving positions are arranged at A, B, C, D total four iron outlets of the blast furnace 14, and two baking positions are arranged at a position which is one train away from each iron receiving position, so that the baking and iron receiving processes are closely connected, the time is saved, the unnecessary waiting time and the heat loss are reduced, the characteristics of high molten iron temperature (the tapping temperature is about 1480 ℃) and high iron outlet positions, large potential energy and large kinetic energy of molten iron which falls from high altitude during the tapping of the blast furnace 14 are fully utilized, high-temperature scrap steel (generally more than 1100 ℃) in the molten iron tank 20 is heated, and the molten iron is melted by contacting without additional work, the efficiency is high, and the cost is low.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (5)
1. A blast furnace iron receiving method for preheating scrap steel of a hot metal ladle is characterized by comprising the following steps:
charging scrap steel into the hot metal ladle (20), conveying the scrap steel to the position below a platform of the blast furnace (14) by a train, baking the scrap steel for 18-20min at a baking position, and carrying out infrared temperature measurement after baking; the roasted hot metal ladle (20) is pulled to a receiving iron position through a ladle (11) to be connected with iron, and after the iron connection is finished, the iron is continuously connected through the movement of a swinging chute (13), namely, the roasting position and the receiving iron position are positioned on the same side track of a blast furnace (14), and the roasting position comprises roasting equipment.
2. The method for receiving iron from a blast furnace by preheating scrap from a hot metal ladle according to claim 1, wherein the roasting apparatus is located above a train track platform, and the roasting apparatus is moved above the train track by a translation track (12).
3. The blast furnace iron receiving method for preheating the scrap steel in the molten iron tank according to claim 1, wherein the baking equipment comprises a heat shield (15), an outer smoke shield (16) and a baking spray gun (17), the outer smoke shield (16) is fixedly mounted at the upper end of the heat shield (15), the top end of the outer smoke shield (16) is communicated with a flue (19), the outer smoke shield (16) is detachably connected with the flue (19), one end of the baking spray gun (17) sequentially penetrates through the top end of the outer smoke shield (16) and the top end of the heat shield (15) to extend to the outside of the heat shield (15), the other end of the baking spray gun (17) is communicated with a delivery pipe (18), and the baking spray gun (17) is detachably connected with the delivery pipe (18).
4. The method for tapping a blast furnace with preheating of the scrap in the hot-metal ladle according to claim 1, wherein the scrap loading amount of the hot-metal ladle (20) is 15-25 t.
5. The method as claimed in claim 3, wherein the flow rate of the mixed gas in the baking lance (17) during the baking process is 3000-3600Nm 3 And h, the distance between the lowest point of the baking spray gun (17) and the hot metal ladle (20) is 300-400 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540845.4A CN115007844B (en) | 2022-05-17 | 2022-05-17 | Blast furnace iron receiving method for preheating scrap steel of hot-metal ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540845.4A CN115007844B (en) | 2022-05-17 | 2022-05-17 | Blast furnace iron receiving method for preheating scrap steel of hot-metal ladle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115007844A true CN115007844A (en) | 2022-09-06 |
| CN115007844B CN115007844B (en) | 2024-02-23 |
Family
ID=83068414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210540845.4A Active CN115007844B (en) | 2022-05-17 | 2022-05-17 | Blast furnace iron receiving method for preheating scrap steel of hot-metal ladle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115007844B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1025887A (en) * | 1962-06-19 | 1966-04-14 | Loire Atel Forges | Improvements in or relating to the layout of converter steelworks |
| CN103433474A (en) * | 2013-08-16 | 2013-12-11 | 北京首钢国际工程技术有限公司 | Two-way conveying system for blast furnace molten iron conveying process of conveying ladle to bottom without stopping |
| JP2014201750A (en) * | 2013-04-01 | 2014-10-27 | 株式会社神戸製鋼所 | Operation method for molten pig iron processing plant |
| CN105238891A (en) * | 2015-10-20 | 2016-01-13 | 北京首钢国际工程技术有限公司 | Direct connection type process for iron making and steel making interface |
| CN207655905U (en) * | 2017-12-11 | 2018-07-27 | 鞍钢股份有限公司 | A kind of online apparatus for baking of hot-metal bottle |
| CN209077781U (en) * | 2018-11-29 | 2019-07-09 | 张家港宏昌钢板有限公司 | The steel scrap apparatus for baking of buggy ladle |
| CN211101577U (en) * | 2019-10-25 | 2020-07-28 | 邯郸钢铁集团有限责任公司 | Device for preheating scrap steel on line in hot metal ladle |
| WO2021179752A1 (en) * | 2020-03-09 | 2021-09-16 | 中冶南方工程技术有限公司 | Blast furnace-converter production system based on molten iron ladle crossing vehicle, and operation method for system |
-
2022
- 2022-05-17 CN CN202210540845.4A patent/CN115007844B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1025887A (en) * | 1962-06-19 | 1966-04-14 | Loire Atel Forges | Improvements in or relating to the layout of converter steelworks |
| JP2014201750A (en) * | 2013-04-01 | 2014-10-27 | 株式会社神戸製鋼所 | Operation method for molten pig iron processing plant |
| CN103433474A (en) * | 2013-08-16 | 2013-12-11 | 北京首钢国际工程技术有限公司 | Two-way conveying system for blast furnace molten iron conveying process of conveying ladle to bottom without stopping |
| CN105238891A (en) * | 2015-10-20 | 2016-01-13 | 北京首钢国际工程技术有限公司 | Direct connection type process for iron making and steel making interface |
| CN207655905U (en) * | 2017-12-11 | 2018-07-27 | 鞍钢股份有限公司 | A kind of online apparatus for baking of hot-metal bottle |
| CN209077781U (en) * | 2018-11-29 | 2019-07-09 | 张家港宏昌钢板有限公司 | The steel scrap apparatus for baking of buggy ladle |
| CN211101577U (en) * | 2019-10-25 | 2020-07-28 | 邯郸钢铁集团有限责任公司 | Device for preheating scrap steel on line in hot metal ladle |
| WO2021179752A1 (en) * | 2020-03-09 | 2021-09-16 | 中冶南方工程技术有限公司 | Blast furnace-converter production system based on molten iron ladle crossing vehicle, and operation method for system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115007844B (en) | 2024-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2222401C (en) | Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases | |
| CN108624740B (en) | Steelmaking equipment and smelting method for steelmaking by using scrap steel | |
| CN110923394B (en) | Steelmaking apparatus and steelmaking method | |
| CN100543149C (en) | Roasting melting reduction iron smelting method and device and raw material | |
| CN101348842B (en) | Oxygen top blown smelting reduction iron manufacturing process | |
| CN111321272A (en) | Steelmaking device and process for continuously preheating scrap steel | |
| CN108866270A (en) | A kind of steelmaking equipment | |
| CN211367630U (en) | Steel-smelting equipment | |
| CN104357655A (en) | Continuous ore reduction and hot-charging steelmaking device | |
| CN202254865U (en) | On-line alloy baking device for steel making | |
| CN208472142U (en) | A kind of steelmaking equipment | |
| CN103333979B (en) | Electricity coal method molten point reduction iron production system and technical process thereof | |
| CN112226565B (en) | Rapid starting method of smelting reduction process | |
| RU2282664C2 (en) | Method and plant for performing metallurgical processes with the aid of carbon-containing materials | |
| CN210802068U (en) | Scrap preheating device and electric arc melting equipment | |
| CN115007844A (en) | Blast furnace iron receiving method for preheating scrap steel of hot metal ladle | |
| CN106834578A (en) | System and method associated with a kind of gas-based shaft kiln and electric furnace | |
| CN102618684B (en) | Continuous melting reduction iron-making device | |
| CN101644535A (en) | Smelting furnace | |
| CN114891952A (en) | Oxygen-fuel-electricity combined scrap steel premelting method | |
| CN208748139U (en) | A kind of electric furnace smelting device | |
| CN110923381A (en) | Short-flow blast furnace iron-making experimental scheme | |
| CN210638480U (en) | Cupola type electric furnace for producing mineral wool | |
| CN107400748A (en) | A kind of fusion reducing furnace and smelting reduction process | |
| CN206385193U (en) | System associated with a kind of gas-based shaft kiln and electric furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |