CN113293256A - Application method of aluminum ash - Google Patents
Application method of aluminum ash Download PDFInfo
- Publication number
- CN113293256A CN113293256A CN202110454934.2A CN202110454934A CN113293256A CN 113293256 A CN113293256 A CN 113293256A CN 202110454934 A CN202110454934 A CN 202110454934A CN 113293256 A CN113293256 A CN 113293256A
- Authority
- CN
- China
- Prior art keywords
- aluminum ash
- converter
- aluminum
- slag
- ash
- 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.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 24
- 238000009628 steelmaking Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000010436 fluorite Substances 0.000 abstract description 4
- 239000006184 cosolvent Substances 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- -1 fluorine ions Chemical class 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C21C7/0006—Adding metallic additives
-
- 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)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
An application method of aluminum ash, which takes the aluminum ash as a slagging constituent for converter steelmaking. Adding aluminum ash in the middle stage of converter blowing, wherein the adding amount is controlled to be 2-4 kg per ton of steel. Realizes the secondary use of the aluminum ash, reduces the environmental pollution, improves the slag melting in the converter steelmaking process, can replace the fluorite cosolvent for the converter steelmaking and reduces the steelmaking cost.
Description
Technical Field
The invention belongs to the technical field of converter steelmaking, and particularly relates to an application method of aluminum ash.
Background
The aluminum ash is waste material produced by aluminum casting enterprises or aluminum electrolysis enterprises, is listed as a solid waste dangerous material by the environmental protection department, and comprises the main components of aluminum oxide (68-83%), aluminum nitride (8-12%), fluoride (2-4%) and the balance of chloride. The untreated aluminum ash contains a large amount of fluorine elements, which can cause serious influence on underground water, serious calcium loss after people and livestock drink the aluminum ash, and in addition, dust and ammonia gas generated by the aluminum ash can cause serious pollution to soil and atmosphere.
The harmless treatment of aluminum ash is a difficult problem in the industry, and a mature, stable and economically feasible industrial scheme is not formed so far. The project uses the aluminum ash in the slag melting of the converter steel-making, which not only can realize the secondary use of the aluminum ash to reduce the environmental pollution, but also can improve the slag melting in the converter steel-making process and reduce the steel-making cost.
Disclosure of Invention
Aiming at the problem of harmless treatment of the aluminum ash, the invention uses the aluminum ash in the slag melting of the converter steelmaking, thereby not only realizing secondary use of the aluminum ash and reducing environmental pollution, but also improving slag melting in the converter steelmaking process and reducing steelmaking cost.
Adding a certain amount of aluminum ash in the converter steelmaking process, and then adding (CaO) - (SiO) in converter slag2) Binary slag system of (CaO) - (Al)2O3）－(SiO2) And (3) converting a ternary slag system, wherein when the components of the converter slag are controlled to be CaO: 40% -45% of SiO2：8%～12%、Al2O3: 3% -5%, TFe 15% -25%, MgO: at 4% -8%, (CaO) - (Al)2O3）－(SiO2) The CaO content in the ternary slag system is about 50 to 55 percent, and SiO content in the ternary slag system2About 33-38% of Al2O3The content is about 12-18%, and the melting point of the ternary slag system is in the range of 1320-1450 ℃, so that the slagging condition in the converter blowing process can be effectively improved, fluorite slagging for converter steelmaking can be replaced, and the steelmaking cost is reduced.
Fluoride in the aluminum ash can decompose fluorine ions, and the fluorine ions can destroy silicate high molecular groups in the slag in the converter steelmaking process, so that the viscosity of the slag is reduced, and the converter steelmaking slagging is further improved;
the technical scheme of the invention is that the application method of the aluminum ash takes the aluminum ash as a converter steelmaking slag former.
Further, aluminum ash is added in the middle stage of converter blowing, and the adding amount is controlled to be 2-4 kg per ton of steel.
Furthermore, the main components and the mass percentage content of the aluminum ash are 68-83 percent of aluminum oxide, 8-12 percent of aluminum nitride and 2-4 percent of fluoride.
Further, adding aluminum ash when converting for 400-540 s in the converter.
Further, the total slag amount of the converter is 65 kg-80 kg per ton of steel.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: realizes the secondary use of the aluminum ash, reduces the environmental pollution, improves the slag melting in the converter steelmaking process, can replace the fluorite cosolvent for the converter steelmaking and reduces the steelmaking cost.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples 1 to 6
In the middle stage of converter steelmaking blowing, aluminum ash is added into a converter as a slag forming material, the main chemical components and the mass percentage content of the aluminum ash are shown in table 1, the adding time of the aluminum ash and the adding amount of steel per ton are shown in table 1, the total slag amount of steel per ton in the whole smelting process of the converter is shown in table 1, and the adding time of the aluminum ash is the time from the beginning of blowing to the adding of the aluminum ash. The amounts of other main slag-forming materials and their tons of steel added during the converter smelting are shown in Table 2.
TABLE 1
TABLE 2
Examples 1-6 the converter smelting process was carried out without the addition of fluorite. Aluminum ash is added in the middle stage of smelting, at the moment, C-O reaction in the furnace is violent, flame at the furnace mouth is strong and powerful, and harsh sound is generated in the furnace, which indicates that the slag has dry back. The slag melting effect is good as the aluminum ash can be obviously relieved about 30 seconds after being added, the flame becomes soft and stable again, the slag is well foamed and fluidity after the furnace is turned down, and no steel sticking phenomenon exists at the furnace mouth and the oxygen lance.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (5)
1. The application method of the aluminum ash is characterized in that the aluminum ash is used as a converter steelmaking slag former.
2. The method for using the aluminum ash as claimed in claim 1, wherein the aluminum ash is added during the middle stage of the converter blowing, and the addition amount is controlled to be 2 kg-4 kg per ton of steel.
3. The application method of the aluminum ash as claimed in any one of claims 1 or 2, wherein the aluminum ash comprises 68-83% of aluminum oxide, 8-12% of aluminum nitride and 2-4% of fluoride by mass.
4. The method for using aluminum ash as claimed in any one of claims 1 or 2, wherein the aluminum ash is added when the converter blows for 400 to 540 seconds.
5. The method of using aluminum ash as claimed in claim 3, wherein the total amount of slag in the converter is 65 kg-80 kg per ton of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110454934.2A CN113293256A (en) | 2021-04-26 | 2021-04-26 | Application method of aluminum ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110454934.2A CN113293256A (en) | 2021-04-26 | 2021-04-26 | Application method of aluminum ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113293256A true CN113293256A (en) | 2021-08-24 |
Family
ID=77320219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110454934.2A Pending CN113293256A (en) | 2021-04-26 | 2021-04-26 | Application method of aluminum ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113293256A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323118A (en) * | 2022-07-05 | 2022-11-11 | 首钢京唐钢铁联合有限责任公司 | Method for preparing converter slag agent from LF (ladle furnace) refining slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1383177A (en) * | 1971-07-10 | 1975-02-05 | Aikoh Co | Slag forming agent for steel making |
| CN104694697A (en) * | 2014-11-26 | 2015-06-10 | 南京钢铁股份有限公司 | Environment-friendly energy-saving novel steelmaking and slagging process |
| CN107245549A (en) * | 2017-06-15 | 2017-10-13 | 王强 | A kind of the efficient of electrolytic aluminium factory aluminium ash utilizes technique |
| CN109338034A (en) * | 2018-09-20 | 2019-02-15 | 江苏大学 | A kind of high reproducibility LF slag system of low cost and the method for smelting aluminum killed steel |
-
2021
- 2021-04-26 CN CN202110454934.2A patent/CN113293256A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1383177A (en) * | 1971-07-10 | 1975-02-05 | Aikoh Co | Slag forming agent for steel making |
| CN104694697A (en) * | 2014-11-26 | 2015-06-10 | 南京钢铁股份有限公司 | Environment-friendly energy-saving novel steelmaking and slagging process |
| CN107245549A (en) * | 2017-06-15 | 2017-10-13 | 王强 | A kind of the efficient of electrolytic aluminium factory aluminium ash utilizes technique |
| CN109338034A (en) * | 2018-09-20 | 2019-02-15 | 江苏大学 | A kind of high reproducibility LF slag system of low cost and the method for smelting aluminum killed steel |
Non-Patent Citations (1)
| Title |
|---|
| 张永卓等: ""工业铝灰在炼钢过程中的无害化应用研究"", 《甘肃冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323118A (en) * | 2022-07-05 | 2022-11-11 | 首钢京唐钢铁联合有限责任公司 | Method for preparing converter slag agent from LF (ladle furnace) refining slag |
| CN115323118B (en) * | 2022-07-05 | 2023-08-15 | 首钢京唐钢铁联合有限责任公司 | Method for preparing slag agent for converter from LF refining slag |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210824 |
|
| RJ01 | Rejection of invention patent application after publication |