CN114703339A - Novel slagging agent for refining furnace - Google Patents
Novel slagging agent for refining furnace Download PDFInfo
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- CN114703339A CN114703339A CN202210295973.7A CN202210295973A CN114703339A CN 114703339 A CN114703339 A CN 114703339A CN 202210295973 A CN202210295973 A CN 202210295973A CN 114703339 A CN114703339 A CN 114703339A
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- 238000007670 refining Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 238000002844 melting Methods 0.000 claims abstract description 23
- 230000008018 melting Effects 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 229910001610 cryolite Inorganic materials 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 7
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 7
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 7
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 5
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 4
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 14
- 229920002774 Maltodextrin Polymers 0.000 claims description 10
- 239000005913 Maltodextrin Substances 0.000 claims description 10
- 229920005610 lignin Polymers 0.000 claims description 10
- 229940035034 maltodextrin Drugs 0.000 claims description 10
- 235000013024 sodium fluoride Nutrition 0.000 claims description 7
- 239000011775 sodium fluoride Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000007767 bonding agent Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 20
- 239000002893 slag Substances 0.000 abstract description 20
- 239000010959 steel Substances 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000000292 calcium oxide Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 5
- 239000010436 fluorite Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- IOXPXHVBWFDRGS-UHFFFAOYSA-N hept-6-enal Chemical compound C=CCCCCC=O IOXPXHVBWFDRGS-UHFFFAOYSA-N 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910018085 Al-F Inorganic materials 0.000 description 1
- 229910018179 Al—F Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a novel slagging agent for a refining furnace, which comprises the following components in percentage by mass: f%: 35-50%, Na%: 15 to 20 percent; 8-15% of Al, CaO: 8 to 15 percent; SiO2 not more than 3%, particle size: 5-40 mm; melting point: 1010-1050 ℃; raw material sampling analysis and material preparation, wherein the raw material after sampling analysis is weighed: 800g of cryolite, 200g of bauxite powder and 125g of binding agent; mixing materials, pressing balls and bagging, wherein the screened qualified spherulites enter a lifting and sorting device for bagging, packaging and warehousing; the slag melting agent is characterized by solving the problem of slow slagging, creating a better inclusion-removing metallurgical environment, improving the quality of steel grade, mainly refining, reducing cost, fulfilling the aim of 'double carbon', being more environment-friendly, and simultaneously realizing the effects of less slag smelting, reducing solid waste discharge and reducing production cost.
Description
Technical Field
The invention relates to a novel slagging agent for a refining furnace.
Background
The slag melting agent is used in the production of steel plants. And (3) searching documents: the CN200710021449.6 patent is found through search: a fluorine-free composite slagging agent for converter steelmaking and a production method thereof are disclosed in the patent CN 200710010471.0: the invention relates to a steel liquid purifying slag agent produced by a blast furnace melting method, which mainly relates to a fluorine-free composite slag melting agent for converter steelmaking, the main use place is a converter, the purpose is to improve dephosphorization rate, and the components and the content of the fluorine-free composite slag melting agent are mainly composed of iron oxide FeO: 40-50%, calcium oxide CaO: 10-20%, manganese oxide MnO: 12-45%, water H2O: 0.5-1%, magnesium oxide MgO: 1-8%, other oxides: alumina Al2O3, silica SiO 2: 1-10% of the composition.
Disclosure of Invention
The invention aims to provide a novel slagging agent for a refining furnace, which can effectively reduce the melting point of steel slag to achieve a good slagging effect, and can reduce the addition amount, reduce the slag amount, reduce the production cost and stabilize the fluidity of molten steel compared with other slagging agents. The refining furnace rapidly melts slag and forms slag, reduces the time of molten steel exposure, and reduces the waste gas generated in the molten steel oxidation process.
The main raw materials of the invention are premelted sodium fluoride: the synthetic waste generated in the process of electrolyzing aluminum mainly contains sodium hexafluoroaluminate (Cryolite), maltodextrin and lignin are used as binding agents in the production process of the slagging agent, so that the binding power is improved, a cold-solidified spherical solid is formed by adopting high-pressure cold pressing, the links of high-temperature baking are reduced, the carbon emission is reduced, the slagging agent is green and environment-friendly, the use of the waste sodium hexafluoroaluminate is realized, and the steel-making cost is reduced.
The invention adopts the technical scheme that a novel slagging agent for a refining furnace comprises the following components in percentage by mass: f%: 35-50%, Na%: 15 to 20 percent; 8-15% of Al, CaO: 8 to 15 percent; SiO2 not more than 3%, particle size: 5-40 mm; melting point: 1010-1050 ℃;
the preparation method comprises the following specific steps:
step 1: raw material sampling analysis and material preparation: pre-melting sodium fluoride, alumyte powder and a binding agent: respectively storing the maltodextrin and the lignin in place for purchase, sampling and analyzing the raw materials, wherein the chemical components are as follows: premelting sodium fluoride: na3AlF6 is more than or equal to 90 percent; bauxite powder: more than or equal to 70 percent of Al2O3 and less than or equal to 25 percent of SiO 2; binding agent: maltodextrin and lignin, wherein the content of the maltodextrin and the lignin is more than or equal to 50-65%;
step 2: preparing materials: weighing the raw materials after sampling and analyzing: 800g of cryolite, 200g of bauxite powder and 125g of the bonding agent;
and step 3: mixing materials: mixing the raw materials, adding the mixture into a mixing mill, uniformly mixing, and then carrying out mixing milling to obtain a uniformly mixed material;
and 4, step 4: pressing the ball: putting the uniformly mixed material into a double-roller type ball press, and performing cold pressing at high pressure of 12MPa to form a cold-set spheroid, wherein the sphere diameter is 5-40 mm;
and 5: bagging: feeding the qualified spherulites into a lifting and sorting device for bagging, packaging and warehousing;
step 6: and (3) finished product: the chemical components of the finished product are as follows according to the weight percentage: f%: 35 to 40 percent; na%: 15-20%, Al 8-15%, CaO: 8 to 15 percent; SiO2 is less than or equal to 3 percent.
The reaction principle is as follows: the cryolite (Na3AlF6) unit cell is a face centered cubic lattice composed of large anions (AlF 63-). Na + can be considered as filling in the interstices of the lattice. The density of cryolite is known to be 2.95g/cm3. the Al-F bond length 181 pm. relative to the atomic mass Na 23.0, Al 27.0, F19.0.1. Indicating the hybrid orbital type and complex ion spatial configuration of the AlF 63-complex ion central ion. 2AL2O3 (melting) =4AL +3O2 (NaALF 6 is cryolite, and acts as a solvent in the reaction, only reduces the melting point of AL2O3 and is beneficial to melting AL2O3, but does not directly react with AL2O 3) in the molten steel refining process. The generated aluminum can reduce iron oxide (2 AL +3FeO = AL2O3+3 Fe) in the slag to increase the metal yield of the molten steel, and a large amount of heat is released during the reaction to help slagging; in addition, the AL2O3 produced by the reaction can further participate in slagging due to high activity.
The novel slagging agent developed by the invention mainly comprises the components of F, Na, Al, CaO and the like. The slag melting agent is a novel strong composite slag melting agent, replaces the traditional fluorite for melting slag, has better slag melting effect compared with the prior art, reduces the consumption of raw materials and has obvious cost advantage. Therefore, the unit carries out an application experiment of the novel slagging agent B on the 120 t converter refining of a steel plant, replaces the original fluorite-based slagging agent with the novel slagging agent, solves the problem of environmental protection and has high slagging speed. And the production cost is obviously reduced.
Compared with the prior art, the slag melting agent emphasizes solving the problem of slow slagging, creates a better inclusion-removing metallurgical environment, improves the quality of steel grade, is mainly used for refining, reduces the cost, achieves the aim of 'double carbon', is more environment-friendly, and simultaneously realizes the effects of less slag smelting, solid waste discharge reduction and production cost reduction.
The tracking production is carried out according to the designed components and the process, the production process is strictly executed according to the process operation rules, the component hit rate reaches 100 percent, the performance completely meets the national standard requirements, and the expected effect is achieved.
And (3) checking the effect: in 2022, 15 months to 3 months and 15 days, the novel slag melting agent is used on the full-series steel grades in a steel plant, 1.48kg of slag is consumed per ton of steel, fluorite is not added in the refining process, and the cost is 3.99 yuan per ton of steel; if fluorite is used, the cost of fluorite per ton of steel is 4.65 yuan per ton of steel, which consumes 2.85kg per ton of steel. The novel slagging agent saves the cost by 0.66 yuan per ton of steel.
The invention can be popularized and applied to various grades of steel refined by the converter, has simple use method and obvious slag melting effect, and can also be popularized and applied in the step of washing the blast furnace.
Detailed Description
A novel slagging agent for a refining furnace comprises the following components in percentage by mass: f%: 35-50%, Na%: 15 to 20 percent; 8-15% of Al, CaO: 8 to 15 percent; SiO2 not more than 3%, particle size: 5-40 mm; melting point: 1010-1050 ℃;
the preparation method comprises the following specific steps:
step 1: raw material sampling analysis and material preparation: pre-melting sodium fluoride, alumyte powder and a binding agent: respectively storing the maltodextrin and the lignin in place for purchase, sampling and analyzing the raw materials, wherein the chemical components are as follows: premelting sodium fluoride: na3AlF6 is more than or equal to 90 percent; alumine powder: more than or equal to 70 percent of Al2O3 and less than or equal to 25 percent of SiO 2; binding agent: maltodextrin and lignin, wherein the content of the maltodextrin and the lignin is more than or equal to 50-65%;
step 2: preparing materials: weighing the raw materials after sampling and analyzing: 800g of cryolite, 200g of bauxite powder and 125g of the bonding agent;
and step 3: mixing materials: mixing the raw materials, adding the mixture into a mixing mill, uniformly mixing, and then carrying out mixing milling to obtain a uniformly mixed material;
and 4, step 4: pressing balls: putting the uniformly mixed material into a double-roller type ball press, and performing cold pressing at high pressure of 12MPa to form a cold-set spheroid, wherein the sphere diameter is 5-40 mm;
and 5: bagging: feeding the qualified spherulites into a lifting and sorting device for bagging, packaging and warehousing;
step 6: and (3) finished product: the chemical components of the finished product comprise the following components in percentage by weight: f%: 35 to 40 percent; na%: 15-20%, Al 8-15%, CaO: 8 to 15 percent; SiO2 is less than or equal to 3 percent.
Claims (1)
1. A novel slagging agent for a refining furnace is characterized by comprising the following components in percentage by mass: f%: 35-50%, Na%: 15 to 20 percent; 8-15% of Al, CaO: 8 to 15 percent; SiO2 not more than 3%, particle size: 5-40 mm; melting point: 1010-1050 ℃;
the preparation method comprises the following specific steps:
step 1: raw material sampling analysis and material preparation: pre-melting sodium fluoride, alumine powder and a bonding agent: respectively storing the maltodextrin and the lignin in place for purchase, sampling and analyzing the raw materials, wherein the chemical components are as follows: premelting sodium fluoride: na3AlF6 is more than or equal to 90 percent; alumine powder: more than or equal to 70 percent of Al2O3 and less than or equal to 25 percent of SiO 2; binding agent: maltodextrin and lignin, wherein the content of the maltodextrin and the lignin is more than or equal to 50-65%;
step 2: preparing materials: weighing the raw materials after sampling and analyzing: 800g of cryolite, 200g of bauxite powder and 125g of the bonding agent;
and step 3: mixing materials: mixing the raw materials, adding the mixture into a mixing mill, uniformly mixing, and then performing mixing milling to obtain a uniformly mixed material;
and 4, step 4: pressing the ball: putting the uniformly mixed material into a double-roller type ball press, and performing cold pressing at high pressure of 12MPa to form a cold-set spheroid, wherein the sphere diameter is 5-40 mm;
and 5: bagging: feeding the qualified spherulites into a lifting and sorting device for bagging, packaging and warehousing;
step 6: and (3) finished product: the chemical components of the finished product are as follows according to the weight percentage: f%: 35 to 40 percent; na%: 15-20%, Al 8-15%, CaO: 8 to 15 percent; SiO2 is less than or equal to 3 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295973.7A CN114703339A (en) | 2022-03-24 | 2022-03-24 | Novel slagging agent for refining furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295973.7A CN114703339A (en) | 2022-03-24 | 2022-03-24 | Novel slagging agent for refining furnace |
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| Publication Number | Publication Date |
|---|---|
| CN114703339A true CN114703339A (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210295973.7A Pending CN114703339A (en) | 2022-03-24 | 2022-03-24 | Novel slagging agent for refining furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN114703339A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369214A (en) * | 2022-09-19 | 2022-11-22 | 巩义市红旗炉料有限公司 | Efficient slagging agent and preparation method and application thereof |
| CN115747421A (en) * | 2022-11-02 | 2023-03-07 | 西峡县龙兴冶金材料有限公司 | Novel environment-friendly slagging agent and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397379A (en) * | 1993-09-22 | 1995-03-14 | Oglebay Norton Company | Process and additive for the ladle refining of steel |
| CN102864284A (en) * | 2012-09-26 | 2013-01-09 | 刘跃 | Slagging agent for ferrous metallurgy |
| 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 |
| CN111363883A (en) * | 2020-05-07 | 2020-07-03 | 姚峰坚 | Slagging agent for steelmaking slag adjustment and preparation method thereof |
| CN113234896A (en) * | 2021-05-13 | 2021-08-10 | 郑州东升冶金新材料有限公司 | Preparation method of fluoroaluminate slagging agent |
| CN114131008A (en) * | 2021-11-30 | 2022-03-04 | 河南通宇冶材集团有限公司 | Efficient slagging agent for semisteel tank and preparation method thereof |
-
2022
- 2022-03-24 CN CN202210295973.7A patent/CN114703339A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397379A (en) * | 1993-09-22 | 1995-03-14 | Oglebay Norton Company | Process and additive for the ladle refining of steel |
| CN102864284A (en) * | 2012-09-26 | 2013-01-09 | 刘跃 | Slagging agent for ferrous metallurgy |
| 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 |
| CN111363883A (en) * | 2020-05-07 | 2020-07-03 | 姚峰坚 | Slagging agent for steelmaking slag adjustment and preparation method thereof |
| CN113234896A (en) * | 2021-05-13 | 2021-08-10 | 郑州东升冶金新材料有限公司 | Preparation method of fluoroaluminate slagging agent |
| CN114131008A (en) * | 2021-11-30 | 2022-03-04 | 河南通宇冶材集团有限公司 | Efficient slagging agent for semisteel tank and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 林彬荫 等: "《耐火材料原料》", 冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369214A (en) * | 2022-09-19 | 2022-11-22 | 巩义市红旗炉料有限公司 | Efficient slagging agent and preparation method and application thereof |
| CN115369214B (en) * | 2022-09-19 | 2024-01-16 | 巩义市红旗炉料有限公司 | Efficient slag melting agent and preparation method and application thereof |
| CN115747421A (en) * | 2022-11-02 | 2023-03-07 | 西峡县龙兴冶金材料有限公司 | Novel environment-friendly slagging agent and preparation method thereof |
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Application publication date: 20220705 |
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