CN211101577U - Device for preheating scrap steel on line in hot metal ladle - Google Patents
Device for preheating scrap steel on line in hot metal ladle Download PDFInfo
- Publication number
- CN211101577U CN211101577U CN201921810043.0U CN201921810043U CN211101577U CN 211101577 U CN211101577 U CN 211101577U CN 201921810043 U CN201921810043 U CN 201921810043U CN 211101577 U CN211101577 U CN 211101577U
- Authority
- CN
- China
- Prior art keywords
- metal ladle
- hot
- steel
- cantilever beam
- scrap steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 66
- 239000010959 steel Substances 0.000 title claims abstract description 66
- 239000002184 metal Substances 0.000 title claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 64
- 241000209094 Oryza Species 0.000 claims abstract description 36
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 36
- 235000009566 rice Nutrition 0.000 claims abstract description 36
- 229910052742 iron Inorganic materials 0.000 claims abstract description 32
- 239000010903 husk Substances 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims abstract description 14
- 238000003763 carbonization Methods 0.000 claims description 11
- 239000002699 waste material Substances 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010079 rubber tapping Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000009628 steelmaking Methods 0.000 description 6
- 230000003137 locomotive effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The utility model relates to a device for preheating scrap steel on line in a hot metal ladle, which belongs to the technical field of converter scrap steel preheating equipment in the metallurgical industry. The technical scheme is as follows: one end of the cantilever beam (4) and the rotating arm (15) is rotatably connected onto the baking support (1) through a pin shaft (16), the other end of the rotating arm (15) is connected with a piston rod of the elevation driving hydraulic cylinder (2), the carbonized rice husk storage cylinder (7) and the molten iron tank cover (5) are respectively fixed onto the cantilever beam (4), a burner (6) and a feed hole (14) are arranged on the molten iron tank cover (5), and the burner (6) is connected with the gas pipeline (3). The utility model has the advantages that: the waste steel in the hot metal ladle can be effectively baked and heated by effectively utilizing the idle waiting time of the hot metal ladle, and the carbonized rice hulls are sprayed on the surface of the waste steel after the waste steel is heated to preserve heat of the preheated waste steel, so that the heat source of the converter is increased.
Description
Technical Field
The utility model relates to a device for preheating scrap steel on line in a hot metal ladle, which belongs to the technical field of converter scrap steel preheating equipment in the metallurgical industry.
Background
There are two main sources of iron-containing raw materials for the steel industry: firstly, ore; and secondly, scrap steel. The former is a natural resource, and the latter is a recycled resource. The waste steel is taken as the direct raw material for steelmaking, so that the processes of sintering, coking, ironmaking and the like before iron are omitted, the energy consumption and the pollution discharge are reduced, and the social accumulated waste steel resource is consumed. The steel plant should use as little molten iron as possible, and has multiple uses of scrap steel, which is not only beneficial to protecting resources, but also beneficial to saving energy, reducing environmental pollution and promoting sustainable development of resources. For steel mills, scrap usage also depends on the price difference between the scrap price and the pig iron price and the flow scheme adopted for production. Since 2017 for 3 months, the country stricken the steel bars strictly, so that the supply side reform is realized, the steel market order is stabilized, and the economic benefit of steel enterprises is greatly improved. But also causes the accumulation of domestic steel scraps in a short period, and the price of the steel scraps is greatly reduced. In order to improve the economic benefit of steel mills, research work for improving the scrap steel ratio of the converter is vigorously carried out by many steel mills.
In converter steelmaking, excess elements such as C, Si, Mn, P, S and the like in molten iron are oxidized by oxygen, the oxidation reaction in a converter is basically an exothermic reaction, and the generated heat is used as a heat source for converter steelmaking. In addition, in the converter steelmaking process, in order to further remove harmful impurity elements such as P, S and protect the furnace lining, adding slag charge for slagging is essential. The slag material absorbs a part of heat in the slagging process; heating molten iron, slag and scrap steel to tapping temperature to absorb heat; the furnace gas also takes away part of the heat. Therefore, the method increases the heat source of the converter, reduces the heat consumption except for the steel scrap, and is an effective way for improving the steel scrap ratio of the converter.
The following methods are mainly adopted for increasing the heat source of the converter: the heat loss of the converter is reduced, and the heat efficiency is improved, such as secondary combustion of furnace gas; the molten pool is carburetted, for example, the furnace bottom is used for blowing oxygen and spraying coal powder to carry out thermal compensation; the scrap steel is preheated by adopting the scrap steel preheating technology in the furnace. In view of the above measures, various converter high scrap ratio smelting processes are developed internationally at present, for example, KMS adopts bottom blowing oxygen pulverized coal injection for thermal compensation, and EOF adopts a converter equipped with a scrap preheating shaft furnace for heating scrap by using flue gas. Although these processes can greatly improve the converter scrap ratio, they all have the problems of greatly reduced converter operating rate, poor equipment reliability, large equipment investment, expensive maintenance and use costs, and the like. Therefore, a technical method which is simple and feasible and can greatly improve the scrap ratio of the converter is urgently needed under the condition of not influencing the production efficiency of the existing converter.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a carry out device that preheats on line to scrap steel in molten iron jar can effectively utilize the idle latency of hot-metal bottle to toast the heating to the scrap steel in the molten iron jar to spray the carbonization rice husk to the scrap steel surface after the scrap steel heating is accomplished and keep warm to preheating the back scrap steel, increase the converter heat source, solve the problem that exists in the background art.
The technical scheme of the utility model is that:
the utility model provides a device that preheats on line at hot metal bottle to scrap steel, contain and toast the support, angle of elevation drive pneumatic cylinder, gas pipeline, the cantilever beam, the molten iron cover, the nozzle, carbonization rice husk storage cylinder, rocking arm and round pin axle, 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, the other end and the piston rod of angle of elevation drive pneumatic cylinder of rocking arm are connected, carbonization rice husk storage cylinder and molten iron cover are fixed respectively on the cantilever beam, be equipped with nozzle and charge door on the molten iron cover, the nozzle is connected with.
The rotation angle of the cantilever beam is 25-30 degrees.
The hot metal cover is circular with hot metal bottle matched with, and the nozzle is fixed in the central point of hot metal cover and is put, and the charge door on the hot metal cover is located the both sides in nozzle hole.
And a carbonized rice hull conveying mechanism is arranged between the carbonized rice hull storage cylinder on the cantilever beam and the charging hole on the molten iron tank cover.
When the utility model is used, firstly, the scrap steel is put into the molten iron tank, then the cantilever beam is rotated to the baking working position from the baking preparation position through the elevation driving hydraulic cylinder, the nozzle is used for burning coke oven gas to heat the scrap steel in the molten iron tank, and the baking is carried out for 30 to 40 minutes; and after the baking is finished, spraying carbonized rice hulls to the surface of the scrap steel by using a spiral conveying mechanism on the cantilever beam to ensure that the surface of the scrap steel is completely covered by the carbonized rice hulls, and conveying the hot metal tank to a blast furnace tapping area by a locomotive for normal tapping after the carbonized rice hulls are added.
The utility model has the advantages that:
(1) the waste steel in the molten iron tank is roasted and preheated by using the tapping waiting time of the molten iron tank, so that the temperature of the waste steel can be effectively increased without influencing the production rhythm, and the temperature of the molten iron is not obviously reduced, thereby indirectly increasing the heat source of the converter;
(2) the carbonized rice hulls are sprayed on the surface of the baked scrap steel, so that the temperature drop of the scrap steel in the period of waiting for tapping by the hot metal ladle is effectively prevented, a converter heat source can be supplemented because the carbonized rice hulls contain a certain amount of carbon, and the carbonized rice hulls are added by an automatic material conveying mechanism, so that the labor intensity of workers is not increased;
(3) the utility model discloses a converter scrap steel heating field's initiative has effectively solved present converter because of the difficult problem that the energy restriction can not further improve the scrap steel ratio. By effectively utilizing the heat outside the converter, the environment is protected, the heat supplement of the converter can be reduced, and the post-blowing times of the converter are reduced, so that the yield of the molten steel is improved, and the quality of the molten steel is improved.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention
In the figure: the device comprises a baking support 1, an elevation driving hydraulic cylinder 2, a gas pipeline 3, a cantilever beam 4, a molten iron tank cover 5, a burner 6, a carbonized rice husk storage cylinder 7, a carbonized rice husk spiral conveying mechanism 8, a molten iron tank 9, a locomotive 10, a baking work position 11, a baking preparation position 12, a burner hole 13, a feeding hole 14, a rotating arm 15 and a pin shaft 16.
Detailed Description
The invention will be further explained by way of example with reference to the accompanying drawings.
Referring to attached drawings 1 and 2, the device for preheating the scrap steel on line in the hot metal ladle comprises a baking support 1, an elevation angle driving hydraulic cylinder 2, a gas pipeline 3, a cantilever beam 4, a hot metal ladle cover 5, a burner 6, a carbonized rice husk storage cylinder 7, a rotating arm 15 and a pin shaft 16, wherein one end of the cantilever beam 4 and one end of the rotating arm 15 are rotatably connected onto the baking support 1 through the pin shaft 16, the other end of the rotating arm 15 is connected with a piston rod of the elevation angle driving hydraulic cylinder 2, the carbonized rice husk storage cylinder 7 and the hot metal ladle cover 5 are respectively fixed onto the cantilever beam 4, the hot metal ladle cover 5 is provided with the burner 6 and a feed hole 14, and the burner 6.
The specific embodiment is as follows:
in this embodiment, referring to fig. 1 and 2, carbonized rice husk storage cylinder 7 and molten iron pot cover 5 are fixed respectively on cantilever beam 4, molten iron pot cover 5 is circular with hot metal ladle 9 matched with, burner 6 is fixed at the central point of molten iron pot cover 5 and is put, charge aperture 14 is located the both sides of burner port hole 13, carbonized rice husk screw conveyor 8 is equipped with between carbonized rice husk storage cylinder 7 and the charge aperture 14, carbonized rice husk conveyor 8 is the commonly used charging apparatus in this technical field, screw conveyor 8 passes through inverter motor drive, with the rotatory conveying of carbonized rice husk in the conveying pipeline to the charge door. There are heating and material level alarm device in carbonization rice husk storage cylinder 7 to guarantee the dry and sufficient material level of carbonization rice husk in the feed cylinder, carbonization rice husk storage cylinder 7 bottom has agitating unit in addition, can smoothly flow into carbonization rice husk spiral conveying mechanism 8 in order to guarantee the carbonization rice husk.
The hydraulic cylinder 2 is driven by an elevation angle to drive the rotating arm 15 to drive the cantilever beam 4 and the molten iron tank cover 5 to rotate by 25-30 degrees, the cantilever beam 4 is lifted to a baking preparation position 12 when not in work, and the cantilever beam is lowered to a baking working position 11 when in work.
The utility model discloses a concrete application method as follows:
a. after the iron adding is finished in the converter from steel making, waste steel is put into a hot metal ladle 9 from the outside of a steel making factory;
b. after adding the scrap steel, conveying the hot metal ladle 9 to a baking station specially arranged near a blast furnace through a locomotive 10, driving a hydraulic cylinder 2 through an elevation angle to rotate the cantilever beam 4 and the hot metal ladle cover 5 from a baking preparation position 12 to a baking working position 11, igniting a burner 6, starting baking, heating the scrap steel in the hot metal ladle 9, and baking for 30-40 minutes;
c. after baking is finished, closing the burner 6, stopping baking, spraying carbonized rice hulls to the surface of the scrap steel by the material conveying mechanism 8 for 3-5 min to ensure that the surface of the scrap steel is completely covered by the carbonized rice hulls, wherein the average thickness of the carbonized rice hulls is 2-3 cm;
d. after the carbonized rice husks are added, the cantilever beam 4 and the molten iron tank cover 5 are rotated to a baking preparation position 12 from a baking working position 11 through the elevation driving hydraulic cylinder 2, and the molten iron tank 9 is conveyed to a blast furnace tapping area by a locomotive 10 for normal tapping;
e. after tapping, the hot metal ladle 9 is transported to a converter bay by the locomotive 10 to prepare for the next converter for iron charging.
Adopt the utility model discloses, after preheating the scrap steel and adding the carbonization rice husk heat preservation, produce 130 stoves altogether, when the hot-metal bottle arrived the baking station, the scrap steel average temperature in the hot-metal bottle was 150 ℃; after average baking for 30min, the average temperature of the scrap steel is 790 ℃ when the scrap steel is taken out of the baking station, until the average temperature of the scrap steel in the molten iron tank before tapping is 710 ℃, and the heat preservation effect is obvious. Through the utility model discloses preheat the back to the steel scrap, the converter increases about 10% of steel scrap ratio, does not have the after-blow heat, has guaranteed production in the same direction as capable and molten steel quality, has gained good effect.
Claims (4)
1. The utility model provides a carry out device that preheats on line to scrap steel at hot-metal bottle, its characterized in that contains and toasts support (1), angle of elevation drive pneumatic cylinder (2), gas pipeline (3), cantilever beam (4), molten iron cover (5), nozzle (6), carbonization rice husk storage cylinder (7), rocking arm (15) and round pin axle (16), the one end of cantilever beam (4) and rocking arm (15) is passed through round pin axle (16) and is rotated the connection and toast on support (1), the other end and the piston rod of angle of elevation drive pneumatic cylinder (2) of rocking arm (15) are connected, carbonization rice husk storage cylinder (7) and molten iron cover (5) are fixed respectively on cantilever beam (4), be equipped with nozzle (6) and charge door (14) on molten iron cover (5), nozzle (6) are connected with gas pipeline (3).
2. The device for preheating the scrap steel on the hot-metal ladle on line according to claim 1, wherein the rotation angle of the cantilever beam (4) is 25-30 degrees.
3. The device for preheating the scrap steel on the hot-metal ladle in the on-line manner according to claim 1 or 2, wherein the hot-metal ladle cover (5) is a round shape matched with the hot-metal ladle (9), the burner (6) is fixed at the center of the hot-metal ladle cover (5), and the feeding hole (14) on the hot-metal ladle cover (5) is positioned at two sides of the burner hole (13).
4. The device for on-line preheating of scrap steel in a hot-metal ladle according to claim 1, wherein a carbonized rice husk spiral conveying mechanism (8) is arranged between the carbonized rice husk storage cylinder (7) on the cantilever beam (4) and the charging hole (14) on the hot-metal ladle cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921810043.0U CN211101577U (en) | 2019-10-25 | 2019-10-25 | Device for preheating scrap steel on line in hot metal ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921810043.0U CN211101577U (en) | 2019-10-25 | 2019-10-25 | Device for preheating scrap steel on line in hot metal ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211101577U true CN211101577U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921810043.0U Expired - Fee Related CN211101577U (en) | 2019-10-25 | 2019-10-25 | Device for preheating scrap steel on line in hot metal ladle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211101577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007844A (en) * | 2022-05-17 | 2022-09-06 | 湖南华菱涟源钢铁有限公司 | Blast furnace iron receiving method for preheating scrap steel of hot metal ladle |
-
2019
- 2019-10-25 CN CN201921810043.0U patent/CN211101577U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007844A (en) * | 2022-05-17 | 2022-09-06 | 湖南华菱涟源钢铁有限公司 | Blast furnace iron receiving method for preheating scrap steel of hot metal ladle |
| CN115007844B (en) * | 2022-05-17 | 2024-02-23 | 湖南华菱涟源钢铁有限公司 | Blast furnace iron receiving method for preheating scrap steel of hot-metal ladle |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 |