CN114277210A - Converter high scrap ratio smelting method and device thereof - Google Patents
Converter high scrap ratio smelting method and device thereof Download PDFInfo
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- CN114277210A CN114277210A CN202111394330.XA CN202111394330A CN114277210A CN 114277210 A CN114277210 A CN 114277210A CN 202111394330 A CN202111394330 A CN 202111394330A CN 114277210 A CN114277210 A CN 114277210A
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- converter
- oxygen
- combustion gun
- annular hole
- annular
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- 238000003723 Smelting Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 65
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 65
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000002485 combustion reaction Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 238000007664 blowing Methods 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims abstract description 3
- 239000002737 fuel gas Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of metallurgy, and relates to a method and a device for smelting high scrap ratio of a converter, wherein an annular hole blowing oxygen combustion gun is arranged on a converter shell of the converter, and an oxygen channel, a gas channel and a powder channel are arranged on the annular hole blowing oxygen combustion gun; according to the adding amount of the scrap steel in the converter, the annular hole injection oxygen combustion gun extends out by a corresponding length, the oxygen channel and the gas channel respectively inject oxygen and gas, and the scrap steel is heated after automatic ignition; stirring, heating and decarbonizing the molten steel in the furnace; meanwhile, the powder channel sprays corresponding powder according to the requirement to treat the components of the molten steel, and a continuous temperature measuring device is adopted to continuously measure the temperature of the molten steel in the process. The invention adopts the mode of arranging the oxygen combustion gun on the furnace wall, breaks through the inherent mode of oxygen supply smelting of the molten iron by the traditional converter top-blown oxygen gun, has large proportion range of adding the waste steel, high melting speed of the waste steel and good stirring effect, and even can cancel the top-blown oxygen gun by arranging the oxygen combustion gun on the furnace wall, thereby saving the space of a factory building and reducing the cost.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a converter high scrap ratio smelting method and a converter high scrap ratio smelting device.
Background
In recent years, with the increase of the steel scrap storage quantity in society, the price of the steel scrap is gradually reduced, and the steel smelting cost is reduced by consuming more steel scrap. However, the heat balance is affected due to excessive addition of scrap steel, which causes insufficient heat in the smelting process. The traditional solution is to add a heat booster, but the heat booster influences the smelting rhythm, the heat utilization rate is low, and the proportion of added scrap steel is limited. And the conventional top-blown oxygen lances do not solve the above problems well.
Disclosure of Invention
In view of the above, the invention aims to solve the problem of scrap utilization, and provides a converter high scrap ratio smelting method and a converter high scrap ratio smelting device.
In order to achieve the purpose, the invention provides the following technical scheme:
a converter high scrap ratio smelting method is characterized in that an annular hole blowing oxygen combustion gun is arranged on a converter shell of a converter, and an oxygen passage, a fuel gas passage and a powder passage are arranged on the annular hole blowing oxygen combustion gun; according to the adding amount of the steel scrap in the converter, extending the annular hole injection oxygen combustion gun by a corresponding length, respectively injecting oxygen and gas through an oxygen channel and a gas channel of the annular hole injection oxygen combustion gun, and automatically igniting and heating the steel scrap;
after the scrap steel in the furnace is melted, adjusting the extension length of an annular hole blowing oxygen combustion gun and the proportion of oxygen and gas, and stirring, heating and decarbonizing the molten steel in the furnace; meanwhile, the powder channel sprays corresponding powder according to the requirement to treat the components of the molten steel, and a continuous temperature measuring device is adopted to continuously measure the temperature of the molten steel in the process;
and after the molten steel is smelted, retracting the annular hole blowing oxygen combustion gun, and finishing the operation.
Further, the converter is 30-350 tons.
Furthermore, the proportion of the scrap steel added into the converter is 15-75%.
Further, the annular hole blowing oxygen combustion gun is fixed on the converter shell and is positioned below an apron board of the converter.
Furthermore, the number of the annular-hole-injection oxygen-combustion guns is 1-6, and the annular-hole-injection oxygen-combustion guns are distributed along the circumference of the converter shell.
A converter high scrap ratio smelting device comprises a converter, wherein an annular hole blowing oxygen combustion gun is arranged on a furnace shell of the converter and is positioned below an apron board of the converter; and oxygen, fuel gas and powder channels are arranged on the annular hole blowing oxygen combustion gun.
Furthermore, the number of the annular-hole-injection oxygen-combustion guns is 1-6, and the annular-hole-injection oxygen-combustion guns are distributed along the circumference of the converter shell.
Furthermore, a telescopic device is arranged on the annular hole injection oxygen combustion gun and used for controlling the length of the annular hole injection oxygen combustion gun entering the converter.
Furthermore, an automatic ignition device is also arranged on the annular hole blowing oxygen combustion gun.
Furthermore, the tail part of the annular hole blowing oxygen combustion gun is also provided with a continuous temperature measuring device.
The invention has the beneficial effects that: the invention adopts the mode of arranging the oxygen combustion gun on the furnace wall, breaks through the inherent mode of oxygen supply smelting of the molten iron by the traditional converter top-blown oxygen gun, has large proportion range of adding the waste steel in the converter smelting, high melting speed of the waste steel and good stirring effect, and even can cancel the top-blown oxygen gun in the mode of arranging the oxygen combustion gun on the furnace wall, thereby saving the space of a factory building and reducing the cost.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a converter high scrap ratio smelting device in the present invention;
FIG. 2 is a schematic view of the annular ring blowing oxy-fuel gun of the present invention.
Reference numerals: 1-an annular hole blowing oxygen combustion gun; 2-converter shell; 3-converter apron board; 11-a water cooling tank; 12-a telescopic device; 13-powder channel; 14-a gas channel; 15-oxygen channel; 16-continuous temperature measuring device.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, a converter smelting device with high scrap ratio includes an annular blowing oxygen combustion gun 1, a converter shell 2, a converter apron 3, and a water cooling tank 11; in this embodiment, the annular blowing oxygen combustion gun 1 adopts a combined blowing device disclosed in chinese patent publication No. CN105950824B, and the annular blowing oxygen combustion gun 1 is provided with a telescopic device 12, a powder passage 13, a gas passage 14, an oxygen passage 15, a continuous temperature measuring device 16, and an automatic ignition device for ignition mounted on the annular blowing oxygen combustion gun 1. The muzzle end of the annular hole oxygen-fuel injection gun 1 is inserted into a water cooling box 11 penetrating through a converter shell, a continuous temperature measuring device 16 is positioned at the tail part of the annular hole oxygen-fuel injection gun 1, and the annular hole oxygen-fuel injection gun 1 is fixedly arranged on the converter shell 2 and is positioned below a converter apron board 3.
A smelting method for a converter with a high scrap ratio adopts the smelting device in the embodiment, an annular hole blowing oxygen combustion gun 1 is used, according to the adding amount of scrap in the converter, the annular hole blowing oxygen combustion gun 1 extends out to a corresponding length, an oxygen channel 15 and a gas channel 14 respectively blow oxygen and gas, and the scrap is heated after being ignited by an automatic ignition device. After the scrap steel in the furnace is melted, adjusting the extension length of the annular hole blowing oxygen combustion gun 1 and the proportion of oxygen and gas, and stirring, heating and decarbonizing the molten steel in the furnace; meanwhile, the powder channel 13 can blow corresponding powder according to the process requirements to treat the components of the molten steel, and the molten steel is continuously measured by the continuous temperature measuring device 16 in the process; after the molten steel is smelted, the annular hole blowing oxygen combustion gun 1 retracts, and the operation is finished.
The converter in the embodiment is a 30-350 ton converter, and the proportion of the scrap steel added into the converter is 15-75%.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. A converter high scrap ratio smelting method is characterized by comprising the following steps: an annular hole blowing oxygen combustion gun is arranged on a furnace shell of the converter, and an oxygen passage, a fuel gas passage and a powder passage are arranged on the annular hole blowing oxygen combustion gun; according to the adding amount of the steel scrap in the converter, extending the annular hole injection oxygen combustion gun by a corresponding length, respectively injecting oxygen and gas through an oxygen channel and a gas channel of the annular hole injection oxygen combustion gun, and automatically igniting and heating the steel scrap;
after the scrap steel in the furnace is melted, adjusting the extension length of an annular hole blowing oxygen combustion gun and the proportion of oxygen and gas, and stirring, heating and decarbonizing the molten steel in the furnace; meanwhile, the powder channel sprays corresponding powder according to the requirement to treat the components of the molten steel, and a continuous temperature measuring device is adopted to continuously measure the temperature of the molten steel in the process;
and after the molten steel is smelted, retracting the annular hole blowing oxygen combustion gun, and finishing the operation.
2. The converter high scrap ratio smelting method according to claim 1, characterized in that: the converter is 30-350 tons.
3. The converter high scrap ratio smelting method according to claim 1, characterized in that: the proportion of the scrap steel added into the converter is 15-75%.
4. The converter high scrap ratio smelting method according to claim 1, characterized in that: the annular hole oxygen-injection combustion gun is fixed on the converter shell and is positioned below an apron board of the converter.
5. The converter high scrap ratio smelting method according to claim 1, characterized in that: the number of the annular-hole-blowing oxygen-burning guns is 1-6, and the annular-hole-blowing oxygen-burning guns are distributed along the circumference of the converter shell.
6. The utility model provides a converter high scrap ratio smelting device, includes the converter, its characterized in that: an annular hole blowing oxygen combustion gun is arranged on a furnace shell of the converter and is positioned below an apron board of the converter; and oxygen, fuel gas and powder channels are arranged on the annular hole blowing oxygen combustion gun.
7. The converter high scrap ratio smelting device according to claim 6, wherein: the number of the annular-hole-blowing oxygen-burning guns is 1-6, and the annular-hole-blowing oxygen-burning guns are distributed along the circumference of the converter shell.
8. The converter high scrap ratio smelting device according to claim 6, wherein: and an automatic ignition device is also arranged on the annular hole blowing oxygen combustion gun.
9. The converter high scrap ratio smelting device according to claim 6, wherein: and an automatic ignition device is also arranged on the annular hole blowing oxygen combustion gun.
10. The converter high scrap ratio smelting device according to claim 6, wherein: the tail part of the annular hole blowing oxygen combustion gun is also provided with a continuous temperature measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111394330.XA CN114277210A (en) | 2021-11-18 | 2021-11-18 | Converter high scrap ratio smelting method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111394330.XA CN114277210A (en) | 2021-11-18 | 2021-11-18 | Converter high scrap ratio smelting method and device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114277210A true CN114277210A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111394330.XA Pending CN114277210A (en) | 2021-11-18 | 2021-11-18 | Converter high scrap ratio smelting method and device thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02166216A (en) * | 1988-12-21 | 1990-06-26 | Sumitomo Metal Ind Ltd | Method for melting scrap |
| CN105950824A (en) * | 2016-06-06 | 2016-09-21 | 中冶赛迪工程技术股份有限公司 | Electric arc furnace steelmaking process with oxygen, fuel and powder common injection |
| CN212430864U (en) * | 2020-06-17 | 2021-01-29 | 洛阳豫新工程技术股份有限公司 | Water-cooled combustion device for waste steel preheating pulverized coal natural gas |
| CN216688209U (en) * | 2021-11-18 | 2022-06-07 | 中冶赛迪技术研究中心有限公司 | Converter high scrap ratio smelting device |
-
2021
- 2021-11-18 CN CN202111394330.XA patent/CN114277210A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02166216A (en) * | 1988-12-21 | 1990-06-26 | Sumitomo Metal Ind Ltd | Method for melting scrap |
| CN105950824A (en) * | 2016-06-06 | 2016-09-21 | 中冶赛迪工程技术股份有限公司 | Electric arc furnace steelmaking process with oxygen, fuel and powder common injection |
| CN212430864U (en) * | 2020-06-17 | 2021-01-29 | 洛阳豫新工程技术股份有限公司 | Water-cooled combustion device for waste steel preheating pulverized coal natural gas |
| CN216688209U (en) * | 2021-11-18 | 2022-06-07 | 中冶赛迪技术研究中心有限公司 | Converter high scrap ratio smelting device |
Non-Patent Citations (1)
| Title |
|---|
| 杨树棠: "氧气转炉吃废钢技术", 《鞍钢技术》 * |
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Application publication date: 20220405 |
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