CN114457211A - Slagging smelting method for prolonging service life of steel ladle - Google Patents
Slagging smelting method for prolonging service life of steel ladle Download PDFInfo
- Publication number
- CN114457211A CN114457211A CN202111618515.4A CN202111618515A CN114457211A CN 114457211 A CN114457211 A CN 114457211A CN 202111618515 A CN202111618515 A CN 202111618515A CN 114457211 A CN114457211 A CN 114457211A
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- CN
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- Prior art keywords
- slag
- balls
- percent
- equal
- service life
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- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 16
- 239000010959 steel Substances 0.000 title claims abstract description 16
- 238000003723 Smelting Methods 0.000 title claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 45
- 238000002844 melting Methods 0.000 claims abstract description 23
- 230000008018 melting Effects 0.000 claims abstract description 23
- 238000007670 refining Methods 0.000 claims abstract description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 5
- 239000004571 lime Substances 0.000 claims abstract description 5
- 229910000677 High-carbon steel Inorganic materials 0.000 claims abstract description 4
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 4
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 4
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 4
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 11
- 239000010436 fluorite Substances 0.000 claims description 10
- 229920002261 Corn starch Polymers 0.000 claims description 4
- 239000008120 corn starch Substances 0.000 claims description 4
- 229910001610 cryolite Inorganic materials 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
Abstract
The invention provides a slagging smelting method for prolonging the service life of a steel ladle, which comprises the following steps: step 1, natural mineral high-temperature synthesis raw materials are crushed, added with a binder, pressed into balls, formed and dried to prepare slag balls, and the slag balls meet the following requirements on components and particle size: na + is more than or equal to 27 percent, F-is more than or equal to 40 percent, CaO is more than or equal to 4 percent, SiO2 is less than or equal to 1.5 percent, Al2O3 is more than or equal to 20 percent, and the granularity is 10-50 mm; step 2, putting the slag melting balls into a standby feed bin of a feeding system; step 3, adding slag melting balls in the refining process when smelting the high-carbon steel, wherein the adding time is as follows: adding slag melting balls immediately after the lime is added in the refining process; the most ideal adding amount for prolonging the service life of the ladle is average 50 Kg/furnace and 0.5Kg of steel per ton. The invention can achieve the purposes of rapidly melting slag, reducing the flushing and erosion of high-oxidizing slag to a furnace lining, prolonging the service life of a ladle and prolonging the service life of a refining furnace.
Description
Technical Field
The invention belongs to the field of metallurgy, and particularly relates to a slagging smelting method for prolonging the service life of a steel ladle.
Background
When the low-carbon aluminum killed steel is smelted (the temperature of molten steel is 1585-1625 ℃, and the carbon content is 0.03-0.25%), the temperature of molten steel in a ladle is high, a deoxidation product is mainly Al2O3, added slag-making materials are mainly lime, are all high-melting-point oxides, the slag-making is slow, and the control of desulfurization and inclusion is not ideal. In order to accelerate slagging, a large amount of fluorite is added in the conventional process to promote slagging, but the fluorite seriously erodes refractory materials, so that the service life of a ladle slag line is short, and the production rhythm and the use safety of a ladle are seriously influenced. Meanwhile, fluorite has certain damage to the environment and human body, the usage amount of fluorite is reduced, and a slagging method is improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a slagging smelting method for prolonging the service life of a ladle aiming at the defects of the background technology, which can achieve the aims of quickly slagging, reducing the flushing and erosion of high-oxidizing slag to a furnace lining, prolonging the service life of the ladle and prolonging the service life of a refining furnace.
The invention adopts the following technical scheme for solving the technical problems:
a slagging smelting method for prolonging the service life of a ladle comprises the following steps:
step 1, natural mineral high-temperature synthesis raw materials are crushed, added with a binder, pressed into balls, formed and dried to prepare slag balls, and the slag balls meet the following requirements on components and particle size: na + is more than or equal to 27 percent, F < - > is more than or equal to 40 percent, CaO is more than or equal to 4 percent, SiO2 is less than or equal to 1.5 percent, Al2O3 is more than or equal to 20 percent, and the granularity is 10-50 mm;
step 2, putting the slag melting balls into a standby feed bin of a feeding system;
step 3, adding slag melting balls in the refining process when smelting the high-carbon steel, wherein the adding time is as follows: adding slag melting balls immediately after the lime is added in the refining process; the most ideal adding amount for prolonging the service life of the steel ladle is average 50 Kg/furnace, and 0.5Kg of steel per ton;
and 4, taking a refined slag sample before and after adding the slag melting ball to perform slag system comparison, and obtaining that the sulfur in the added slag is obviously reduced, and the usage amount is obviously reduced compared with fluorite, which shows that the corrosion of a refining furnace is relieved, and the ladle life is improved.
Further, the natural mineral is cryolite.
Furthermore, the binder is corn starch.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the invention relates to a new method for melting slag in a ladle, which utilizes natural minerals such as cryolite and the like to synthesize raw materials at high temperature, adds binders such as corn starch and the like after crushing, shapes by pressing balls, dries and then adds the raw materials into a refining furnace, thereby achieving the purposes of quickly melting slag, reducing the flushing and erosion of high-oxidizing slag to a furnace lining, prolonging the service life of the ladle and improving the service life of the refining furnace. Compared with the traditional fluorite, the slagging cost is low. The method is not suitable for steel grades with high requirements on impurities.
Detailed Description
The technical scheme of the invention is further explained in detail as follows:
in the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", and the like are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and that "first", "second", and the like do not represent a significant degree of particularity, and are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
A slagging smelting method for prolonging the service life of a ladle comprises the following steps:
step 1, synthesizing a raw material from natural minerals at a high temperature, wherein the natural minerals are cryolite. The natural mineral is crushed and added with the binder to be pressed into balls for molding and drying, so as to prepare slag balls and meet the requirements of the following components and particle sizes: na + is more than or equal to 27 percent, F < - > is more than or equal to 40 percent, CaO is more than or equal to 4 percent, SiO2 is less than or equal to 1.5 percent, Al2O3 is more than or equal to 20 percent, and the granularity is 10-50 mm; the binder is corn starch.
Step 2, putting the slag melting balls into a standby feed bin of a feeding system;
step 3, adding slag melting balls in the refining process when smelting the high-carbon steel, wherein the adding time is as follows: adding slag melting balls immediately after the lime is added in the refining process; the most ideal adding amount for prolonging the service life of the steel ladle is average 50 Kg/furnace, and 0.5Kg of steel per ton;
and 4, taking a refined slag sample before and after adding the slag melting balls, and comparing slag systems: as shown in tables 1 and 2, the sulfur content in the slag after the addition is obviously reduced, and the usage amount is obviously reduced compared with that of fluorite, which shows that the corrosion of a refining furnace is relieved, and the ladle life is improved.
Table 1 the fluorite consumption data are as follows:
table 2 SWRH82B steel grade plus flux consumption data are as follows:
consumption data of SG400-T steel grade added with fluxing agent are as follows:
by using the tracking, the furnace life is improved by more than 15 times, and the cost of the slagging pellets is far lower than that of fluorite, so that the furnace life is improved, and the slagging cost is reduced. Fluorite unit price: 2800 yuan/ton, unit price of slag melting balls: the weight of the material is 1500 yuan/ton,
because the Al2O3 content of the slag melting ball is higher, when the slag melting ball is used in the production process of aluminum killed steel, the content of alumina in a slag system can be increased, a low-melting-point calcium aluminate slag system is favorably manufactured, and the slag melting ball is very favorable for promoting slag melting and desulfurization.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (3)
1. A slagging smelting method for prolonging the service life of a ladle is characterized by comprising the following steps: the method comprises the following steps:
step 1, natural mineral high-temperature synthesis raw materials are crushed, added with a binder, pressed into balls, formed and dried to prepare slag balls, and the slag balls meet the following requirements on components and particle size: na + is more than or equal to 27 percent, F < - > is more than or equal to 40 percent, CaO is more than or equal to 4 percent, SiO2 is less than or equal to 1.5 percent, Al2O3 is more than or equal to 20 percent, and the granularity is 10-50 mm;
step 2, putting the slag melting balls into a standby feed bin of a feeding system;
step 3, adding slag melting balls in the refining process when smelting the high-carbon steel, wherein the adding time is as follows: adding slag melting balls immediately after the lime is added in the refining process; the most ideal adding amount for prolonging the service life of the steel ladle is average 50 Kg/furnace, and 0.5Kg of steel per ton;
and 4, taking a refined slag sample before and after adding the slag melting ball to perform slag system comparison, and obtaining that the sulfur in the added slag is obviously reduced, and the usage amount is obviously reduced compared with fluorite, which shows that the corrosion of a refining furnace is relieved, and the ladle life is improved.
2. The slagging smelting method for prolonging the service life of the ladle according to claim 1, characterized in that: the natural mineral is cryolite.
3. The slagging smelting method for prolonging the service life of the ladle according to claim 1, characterized in that: the binder is corn starch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618515.4A CN114457211A (en) | 2021-12-28 | 2021-12-28 | Slagging smelting method for prolonging service life of steel ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618515.4A CN114457211A (en) | 2021-12-28 | 2021-12-28 | Slagging smelting method for prolonging service life of steel ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114457211A true CN114457211A (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111618515.4A Pending CN114457211A (en) | 2021-12-28 | 2021-12-28 | Slagging smelting method for prolonging service life of steel ladle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114457211A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115595404A (en) * | 2022-10-25 | 2023-01-13 | 攀枝花钢城集团有限公司（Cn） | Slagging agent for AOD furnace and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307375A (en) * | 2008-07-11 | 2008-11-19 | 重庆大学 | Antisticking ladle dreg modifying agent for refining out of furnace |
| EP2213753A1 (en) * | 2009-02-02 | 2010-08-04 | AKADEMIA GORNICZO-HUTNICZA im. Stanislawa Staszica | Method of production of a slag-forming compound for secondary steel refining in a ladle or ladle furnace |
| CN103509910A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Molten steel refining fluxing agent and its making method |
| CN111334627A (en) * | 2020-03-20 | 2020-06-26 | 莱芜钢铁冶金生态工程技术有限公司 | Metallurgy fluorine-containing slagging agent and preparation method and application thereof |
-
2021
- 2021-12-28 CN CN202111618515.4A patent/CN114457211A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307375A (en) * | 2008-07-11 | 2008-11-19 | 重庆大学 | Antisticking ladle dreg modifying agent for refining out of furnace |
| EP2213753A1 (en) * | 2009-02-02 | 2010-08-04 | AKADEMIA GORNICZO-HUTNICZA im. Stanislawa Staszica | Method of production of a slag-forming compound for secondary steel refining in a ladle or ladle furnace |
| CN103509910A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Molten steel refining fluxing agent and its making method |
| CN111334627A (en) * | 2020-03-20 | 2020-06-26 | 莱芜钢铁冶金生态工程技术有限公司 | Metallurgy fluorine-containing slagging agent and preparation method and application thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115595404A (en) * | 2022-10-25 | 2023-01-13 | 攀枝花钢城集团有限公司（Cn） | Slagging agent for AOD furnace and preparation method thereof |
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Application publication date: 20220510 |
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