CN114737013A - Converter steelmaking slag melting agent prepared from aluminum ash dolomite and preparation method thereof - Google Patents
Converter steelmaking slag melting agent prepared from aluminum ash dolomite and preparation method thereof Download PDFInfo
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- CN114737013A CN114737013A CN202210463698.5A CN202210463698A CN114737013A CN 114737013 A CN114737013 A CN 114737013A CN 202210463698 A CN202210463698 A CN 202210463698A CN 114737013 A CN114737013 A CN 114737013A
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- Prior art keywords
- aluminum
- aluminum ash
- dolomite
- light
- ash
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 48
- 229910000514 dolomite Inorganic materials 0.000 title claims abstract description 46
- 239000010459 dolomite Substances 0.000 title claims abstract description 46
- 238000009628 steelmaking Methods 0.000 title claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 23
- 239000002893 slag Substances 0.000 title claims abstract description 20
- 238000002844 melting Methods 0.000 title claims abstract description 15
- 230000008018 melting Effects 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 35
- 238000003825 pressing Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 8
- 239000011265 semifinished product Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000395 magnesium oxide Substances 0.000 abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 4
- 239000004480 active ingredient Substances 0.000 abstract description 3
- 229910001610 cryolite Inorganic materials 0.000 description 4
- IOXPXHVBWFDRGS-UHFFFAOYSA-N hept-6-enal Chemical compound C=CCCCCC=O IOXPXHVBWFDRGS-UHFFFAOYSA-N 0.000 description 4
- CAVCGVPGBKGDTG-UHFFFAOYSA-N alumanylidynemethyl(alumanylidynemethylalumanylidenemethylidene)alumane Chemical compound [Al]#C[Al]=C=[Al]C#[Al] CAVCGVPGBKGDTG-UHFFFAOYSA-N 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- HIMLGVIQSDVUJQ-UHFFFAOYSA-N aluminum vanadium Chemical compound [Al].[V] HIMLGVIQSDVUJQ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- 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
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Furnace Details (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a converter steelmaking slag melting agent prepared from aluminum ash dolomite and a preparation method thereof. The invention adopts the aluminum ash and the light-burned dolomite powder with proper proportion to be mixed and homogenized in a mixing vessel which blocks the air circulation to form dry mixture, and the dry mixture is dry-pressed into the ellipsoidal slag melting agent for converter steelmaking, thereby avoiding the loss of various active ingredients with high reaction activity, such as metallic aluminum, in the aluminum ash. The composite slagging material (agent) which is produced by taking the aluminum ash and the light calcined dolomite powder as raw materials, namely the composite slagging material (agent) containing magnesium oxide and aluminum oxide components can improve the slagging operation of converter steelmaking, overcome the defects of large resource consumption and high cost existing by taking the aluminum vanadic soil blocks and the light calcined dolomite blocks as slagging raw materials, and realize the effect of directly recycling the light calcined dolomite fine powder.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization of waste resources, and particularly relates to a converter steelmaking slag melting agent prepared from aluminum ash dolomite and a preparation method thereof.
Background
At present, slag melting materials (agents) for converter steelmaking usually adopt light-burned dolomite or light-burned bauxite as raw materials, have the defects of large resource consumption and high firing cost, and aluminum ash (secondary aluminum ash obtained by recycling metal aluminum in the invention) contains up to 70 percent of Al2O3And has a melting point lower than that of light-burned bauxite (because the composition contains low-melting point substances such as sodium hexafluoroaluminate), but most of secondary aluminum ash is fine powder material which can not be directly used for converter steelmaking, and in addition, the light-burned bauxite can be used for light-burned bauxiteThe production process of dolomite generates a large amount of light-burned dolomite fine powder with the granularity less than 5mm, and a converter can not be utilized, so if a composite slagging material (agent) which is produced by taking aluminum ash and light-burned dolomite powder as raw materials, namely contains magnesium oxide and aluminum oxide components can be invented, the slagging operation of converter steelmaking can be improved, the defects of high resource consumption and high cost existing by taking aluminum vanadium soil blocks and light-burned dolomite blocks as slagging raw materials can be overcome, the useful components of the aluminum ash can be simultaneously utilized fully, the light-burned dolomite fine powder can be directly recycled, the occupation of waste resource stockpiling land and the negative effects of other environmental protection can be reduced, and the comprehensive utilization of resources has positive significance in the aspects of economy, environmental protection, society and the like.
Disclosure of Invention
The invention aims to: aiming at the above situation mainly and overcoming the defects of the prior art, the invention aims to provide a slag melting agent for converter steelmaking and a preparation method thereof.
The technical scheme of the invention is as follows: a slag-dissolving agent for converter steelmaking is prepared from Al ash and dolomite powder through homogenizing, mixing, and dry pressing to become balls2O3The aluminum ash is characterized by comprising ellipsoidal particles with the content sum of CaO and MgO not less than 80%, the compressive strength not less than 5Mpa and the particle size range between 12mm and 35mm, the particle size of the aluminum ash is not more than 1mm, the particle size of the light-burned dolomite powder is not more than 5mm, and the mass content of the aluminum ash in the raw materials is not more than 50% of the sum of the mass of the aluminum ash and the light-burned dolomite powder.
The method for preparing the converter steelmaking slag melting agent prepared from the aluminum-lime dolomite comprises the following steps:
the method comprises the following steps: mixing and homogenizing aluminum ash and light-burned dolomite powder in a proper proportion in a mixing device for blocking air circulation to form dry mixture;
step two: adding the dry mixture into a ball pressing device, and pressing the dry mixture into ellipsoidal semi-finished product particles with the granularity of not more than 35mm, wherein the pressure intensity of the pressing forming is not less than 35 Mpa;
step three: sieving the ellipsoidal semi-finished product particles to obtain qualified 12 mm-35 mm ellipsoidal particles and unqualified particles with the particle size not greater than 12 mm;
step four: and returning the unqualified granules with the granularity of not more than 12mm to the second step and the third step.
The invention has the beneficial effects that: the invention adopts the steps of mixing and homogenizing the aluminum ash and the light-burned dolomite powder in a mixing container which blocks the circulation of air to form dry mixture, and dry-pressing the dry mixture into the ellipsoidal slag melting agent for converter steelmaking, thereby avoiding the loss of various active ingredients with high reaction activity, such as metallic aluminum, in the aluminum ash. The composite slagging material (agent) which is produced by taking the aluminum ash and the light-burned dolomite powder as raw materials and contains magnesium oxide and aluminum oxide components can improve the slagging operation of converter steelmaking, overcome the defects of large resource consumption and high cost existing by taking the aluminum-vanadium soil blocks and the light-burned dolomite blocks as slagging raw materials, and realize the effect of directly recycling the light-burned dolomite fine powder.
The specific implementation mode is as follows:
the following further describes the embodiments of the present invention in detail.
A slag-dissolving agent for converter steelmaking is prepared from Al ash and dolomite powder through homogenizing, mixing, and dry pressing to become balls2O3The aluminum ash-containing slag comprises ellipsoidal particles, wherein the sum of the contents of CaO and MgO is not less than 80%, the compressive strength is not less than 5Mpa, the particle size range is 12 mm-35 mm, the particle size of aluminum ash is not more than 1mm, the particle size of light-burned dolomite dust is not more than 5mm, and the mass content of the aluminum ash in the raw materials is not more than 50% of the sum of the mass of the aluminum ash and the light-burned dolomite dust.
The method for preparing the converter steelmaking slag melting agent prepared from the aluminum-lime dolomite comprises the following steps:
the method comprises the following steps: mixing and homogenizing aluminum ash and light-burned dolomite powder in a proper proportion in a mixing device for blocking air circulation to form dry mixture;
step two: adding the dry mixture into a ball pressing device, and pressing the dry mixture into ellipsoidal semi-finished product particles with the granularity of not more than 35mm, wherein the pressure intensity of the pressing forming is not less than 35 Mpa;
step three: sieving the ellipsoidal semi-finished product particles to obtain qualified 12 mm-35 mm ellipsoidal particles and unqualified particles with the particle size smaller than 12 mm;
step four: and returning the unqualified granules with the granularity of less than 12mm to the second step and the third step.
The first embodiment is as follows: al in secondary aluminum ash for use in carrying out the invention2O3Content of 78% SiO210 percent of sodium hexafluoroaluminate, metallic aluminum, aluminum carbide and the like; the light-burned dolomite powder is powder with dolomite granularity not more than 5 percent screened by the light-burned dolomite for producing steelmaking slag, and the light-burned dolomite powder contains 30 percent of MgO and 56 percent of CaO. The preparation steps are as follows:
the method comprises the following steps: mixing and homogenizing 40% of aluminum ash and 60% of light-burned dolomite powder in parts by weight in a double-helix conical mixer with a sealing cover to obtain dry mixed materials;
step two: and (3) adding the dry mixture into a ball pressing device under a molding pressure of 30Mpa in a roll-type dry ball press to be pressed into ellipsoidal semi-finished product particles with the granularity of not more than 35 mm.
Step three: screening the ellipsoidal semi-finished product particles to obtain qualified ellipsoidal particles of 25 mm-35 mm and unqualified powder with the particle size not greater than 25 mm;
step four: returning unqualified particles with the particle size of not more than 25mm to the second step and the third step, and pressing all the aluminum ash and the light-burned magnesium dolomite powder into ellipsoidal particles with the particle size of 25 mm-35 mm.
The chemical states of sodium hexafluoroaluminate, metallic aluminum and aluminum carbide in the aluminum ash are kept unchanged in the steps.
Example one obtained slagging agent Al for converter steelmaking2O3The sum of the contents of CaO and MgO is 82 percent, and the compressive strength is 7 Mpa; the converter steelmaking slag former prepared in the first example has good effect when the converter steelmaking slag former is used for converter slagging in a certain 100t of oxygen converter. Theory of the inventionAnd the use shows that the Al in the secondary aluminum ash used in the invention2O3And low-melting-point components such as sodium hexafluoroaluminate and the like can effectively eliminate 2CaO and SiO in smelting2The generated dry-back phenomenon, the metal aluminum in the aluminum ash and the carbon-nitrogen compound of the aluminum are oxidized into Al in the slagging process2O3、CO2、H2The heating of molten iron is accelerated by the heat of O and the like, MgO and CaO in dolomite powder can play the traditional roles of improving the fluidity of slag, effectively dephosphorizing and desulfurizing, and metallic aluminum, aluminum carbide, aluminum nitride and the like in aluminum ash are oxidized by oxygen or FeO and the like in the slag to release heat, thereby being beneficial to improving the temperature and the slag melting speed of the slag.
The technical scheme and the first embodiment show that the aluminum ash and the light-burned dolomite powder in a proper proportion are mixed and homogenized in a mixing container for blocking air circulation to form dry mixture, and the dry mixture is dry-pressed into the ellipsoidal converter steelmaking slag melting agent, so that loss of various active ingredients with high reaction activity in the aluminum ash, such as metallic aluminum, is avoided, and the effect of heating and providing heat is achieved. The composite slagging material (agent) which is produced by taking the aluminum ash and the light calcined dolomite powder as raw materials, namely the composite slagging material (agent) containing magnesium oxide and aluminum oxide components can improve the slagging operation of converter steelmaking, overcome the defects of large resource consumption and high cost existing by taking the aluminum vanadic soil blocks and the light calcined dolomite blocks as slagging raw materials, and realize the effect of directly recycling the light calcined dolomite fine powder.
The above description is only for the preferred embodiment of the present invention, but the protection direction of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solution and the inventive concept of the present invention are equivalent to be replaced or changed within the technical scope of the present invention.
Claims (2)
1. A slag-smelting agent for converter is prepared from aluminium ash dolomite and dolomite powderIs characterized in that: the slag melting agent for converter steelmaking is Al prepared by taking aluminum ash and light-burned dolomite powder as raw materials through homogenizing, mixing and dry pressing to form balls2O3The aluminum ash is characterized by comprising ellipsoidal particles with the content sum of CaO and MgO not less than 80%, the compressive strength not less than 5Mpa and the particle size range between 12mm and 35mm, the particle size of the aluminum ash is not more than 1mm, the particle size of the light-burned dolomite powder is not more than 5mm, and the mass content of the aluminum ash in the raw materials is not more than 50% of the sum of the mass of the aluminum ash and the light-burned dolomite powder.
2. The method for preparing the slagging agent for converter steelmaking from the aluminum dolomite ash of claim 1 is characterized by comprising the following steps:
the method comprises the following steps: mixing and homogenizing aluminum ash and light-burned dolomite powder in a proper proportion in a mixing device for blocking air circulation to form dry mixture;
step two: adding the dry mixture into a ball pressing device, and pressing the dry mixture into ellipsoidal semi-finished product particles with the granularity of not more than 35mm, wherein the pressure intensity of the pressing forming is not less than 35 Mpa;
step three: sieving the ellipsoidal semi-finished product particles to obtain qualified 12 mm-35 mm ellipsoidal particles and unqualified particles with the particle size smaller than 12 mm;
step four: and returning the unqualified granules with the granularity of not more than 12mm to the second step and the third step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210463698.5A CN114737013A (en) | 2022-04-29 | 2022-04-29 | Converter steelmaking slag melting agent prepared from aluminum ash dolomite and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210463698.5A CN114737013A (en) | 2022-04-29 | 2022-04-29 | Converter steelmaking slag melting agent prepared from aluminum ash dolomite and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114737013A true CN114737013A (en) | 2022-07-12 |
Family
ID=82286295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210463698.5A Pending CN114737013A (en) | 2022-04-29 | 2022-04-29 | Converter steelmaking slag melting agent prepared from aluminum ash dolomite and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114737013A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09118911A (en) * | 1995-10-26 | 1997-05-06 | Technic Sangyo Kk | Granular state complex refining material |
| JP2001040430A (en) * | 1999-07-27 | 2001-02-13 | Technic Sangyo Kk | Active slag-making material |
| CN106350632A (en) * | 2016-10-31 | 2017-01-25 | 湛江盛宝科技有限公司 | Light roasting pressing ball for converter steelmaking and preparation method of light roasting pressing ball |
| CN111139332A (en) * | 2020-01-21 | 2020-05-12 | 鞍钢股份有限公司 | Slag former and light and thin scrap steel mixed processing furnace entering process |
| CN113528756A (en) * | 2021-05-28 | 2021-10-22 | 史玉山 | Slag melting agent for converter steelmaking and use method thereof |
-
2022
- 2022-04-29 CN CN202210463698.5A patent/CN114737013A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09118911A (en) * | 1995-10-26 | 1997-05-06 | Technic Sangyo Kk | Granular state complex refining material |
| JP2001040430A (en) * | 1999-07-27 | 2001-02-13 | Technic Sangyo Kk | Active slag-making material |
| CN106350632A (en) * | 2016-10-31 | 2017-01-25 | 湛江盛宝科技有限公司 | Light roasting pressing ball for converter steelmaking and preparation method of light roasting pressing ball |
| CN111139332A (en) * | 2020-01-21 | 2020-05-12 | 鞍钢股份有限公司 | Slag former and light and thin scrap steel mixed processing furnace entering process |
| CN113528756A (en) * | 2021-05-28 | 2021-10-22 | 史玉山 | Slag melting agent for converter steelmaking and use method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张深根: "典型废旧金属循环利用技术", 28 February 2017, 冶金工业出版社, pages: 125 * |
| 本书委员会: "钢铁工业节能减排新技术5000问", 31 July 2009, 中国科学技术出版社, pages: 123 * |
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