CN115369214B - Efficient slag melting agent and preparation method and application thereof - Google Patents
Efficient slag melting agent and preparation method and application thereof Download PDFInfo
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- CN115369214B CN115369214B CN202211134788.6A CN202211134788A CN115369214B CN 115369214 B CN115369214 B CN 115369214B CN 202211134788 A CN202211134788 A CN 202211134788A CN 115369214 B CN115369214 B CN 115369214B
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- 239000002893 slag Substances 0.000 title claims abstract description 72
- 238000002844 melting Methods 0.000 title claims abstract description 68
- 230000008018 melting Effects 0.000 title claims abstract description 68
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 40
- 239000002910 solid waste Substances 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 239000003792 electrolyte Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000012065 filter cake Substances 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 4
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005496 tempering Methods 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 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 17
- 239000010436 fluorite Substances 0.000 abstract description 16
- 239000002245 particle Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910001610 cryolite Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002699 waste material 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to steel smeltingThe technical field of slag melting agents, in particular to a high-efficiency slag melting agent and a preparation method and application thereof, wherein the high-efficiency slag melting agent comprises a component A with the granularity of 200-500 mu m and a component B with the granularity of 10-100mm, and the mass ratio of the component A to the component B is 0.3-0.8:1; wherein, the component A comprises a first solid waste and a first aluminum source, and the component B comprises a second solid waste and a second aluminum source; the first solid waste and the second solid waste are electrolytes obtained by electrolyzing aluminum, and the first solid waste and the first aluminum source enable the composition of the component A to meet the following conditions: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is between 20 and 35. The efficient slagging agent can fully utilize electrolyte solid waste obtained by electrolytic aluminum, can completely replace fluorite, can obviously promote slagging during application, and simultaneously reduces the dosage of the efficient slagging agent.
Description
Technical Field
The invention relates to the technical field of steel smelting slag melting agents, in particular to a high-efficiency slag melting agent and a preparation method and application thereof.
Background
Fluorite as a mineral whose main component is calcium fluoride (CaF 2 ) The method is widely used in the fields of aerospace, aviation, medicine, electronics, electric power, machinery, atomic energy and the like. With the continued development of science and technology and national economy, fluorite has become an important mineral raw material in the modern industry, and many developed countries have reserved it as strategic material.
During the early slag formation in the steel refining process, a certain amount of fluorite is needed to be added as a slag melting flux, which is a conventional operation process of steel plants at home and abroad. However, in recent years, the price of fluorite is increased to a certain extent due to the influence of fluorite resource shortage, and the production cost of steelmaking enterprises is increased. Therefore, the reduction of the slag amount is an important measure for reducing the production cost of clean steel, and the reduction of the slag amount and the reduction of the iron loss in the steelmaking process achieve the purpose of reducing the smelting cost. Therefore, searching for a slag melting agent for steel refining with low cost, fast slag formation and strong slag melting capability is an important subject in the steel smelting industry.
In the production process of electrolytic aluminum, a large amount of solid waste product electrolyte is generated, the main component of the electrolyte is cryolite, and in general, the electrolyte is taken out by an electrolytic aluminum factory and is piled up as industrial solid waste, so that a large amount of resource waste is caused, and serious environmental pollution is formed.
Therefore, there is an urgent need in the art for a high-efficiency slag melting agent that can replace fluorite and make full use of solid wastes.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the efficient slag melting agent, the preparation method and the application thereof, wherein the efficient slag melting agent can fully utilize electrolyte solid waste obtained by electrolytic aluminum, can completely replace fluorite, can obviously promote slag melting during application, and simultaneously reduces the dosage of the efficient slag melting agent.
In order to achieve the aim, the first aspect of the invention provides a high-efficiency slag melting agent, which comprises a component A with the granularity of 200-500 mu m and a component B with the granularity of 10-100mm, wherein the mass ratio of the component A to the component B is 0.3-0.8:1; wherein, the component A comprises a first solid waste and a first aluminum source, and the component B comprises a second solid waste and a second aluminum source; the first solid waste and the second solid waste are electrolyte obtained by electrolyzing aluminum, and
the first solid waste and the first aluminum source are such that the composition of component a satisfies: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is 20-35;
the second solid waste and the second aluminum source are such that the composition of component B satisfies: based on the compound mass content, (KF+AlF) 3 The value of +MgF)/(NaF+CaF) is in the range of 0.2 to 0.8.
In a preferred embodiment, the first solid waste and the first aluminum source are such that the composition of component a satisfies: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is 24-28.
In a preferred embodiment, the second solid waste and the second aluminum source are such that the composition of component B satisfies: based on the compound mass content, (KF+AlF) 3 The value of +MgF)/(NaF+CaF) is in the range of 0.4 to 0.6.
In a preferred embodiment, the first and second aluminum sources are each independently alumina.
In another preferred embodiment, the first and second aluminum sources are each independently alumina and aluminum ash.
Wherein preferably the particle size of component A is in the range of 200-350 μm and the particle size of component B is in the range of 70-100mm.
Preferably, the mass ratio of component A to component B is from 0.3 to 0.5:1.
In a second aspect, a method for preparing the efficient slag melting agent according to the first aspect is provided, which comprises the following steps:
(1) Preparing a component A and a component B according to the required composition;
(2) Mixing the component A, the component B and water, and heating and stirring;
(3) Then filtering in a plate-and-frame filter to obtain filtrate and a filter cake;
(4) And (3) airing and ball pressing the filter cake to form the efficient slag melting agent.
Preferably, the method further comprises: and (3) tempering and removing impurities from the filtrate to prepare the industrial sodium chloride and lithium carbonate.
In a third aspect, the application of the efficient slag melting agent in steel smelting is provided, wherein the adding amount of the efficient slag melting agent is 0.1-0.7 kg/ton of iron or ton of steel.
Compared with the prior art, the invention takes a large amount of electrolyte solid waste generated in the process of aluminum electrolysis as a raw material, and can form the high-efficiency slag melting agent with specific synergistic components through specific component proportion, so that the slag forming and melting speed is high, fluorite can be completely replaced, and the lime melting point in the steelmaking process can be effectively reduced when the high-efficiency slag melting agent is used for steel smelting. The similar products on the market often emit white smoke during the use process due to the too high sodium content, which affects the use. The high-efficiency slag melting agent product can control the sodium content to be within a reasonable range, and improves the use efficiency. In the preferred treatment process, two by-products, namely industrial sodium chloride and lithium carbonate, are also produced.
The high-efficiency slag melting agent has low melting point (about 1100 ℃), reasonable price, and can reduce the dosage by 35-50% and reduce the cost after replacing fluorite by using the product.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The first aspect of the invention provides a high-efficiency slag melting agent, which comprises a component A with the granularity of 200-500 mu m and a component B with the granularity of 10-100mm, wherein the mass ratio of the component A to the component B is 0.3-0.8:1; wherein, the component A comprises a first solid waste and a first aluminum source, and the component B comprises a second solid waste and a second aluminum source; the first solid waste and the second solid waste are electrolyte obtained by electrolyzing aluminum, and
the first solid waste and the first aluminum source are such that the composition of component a satisfies: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is 20-35;
the second solid waste and the second aluminum source are such that the composition of component B satisfies: based on the compound mass content, (KF+AlF) 3 The value of +MgF)/(NaF+CaF) is in the range of 0.2 to 0.8.
The main component of the electrolyte solid waste material obtained by the electrolytic aluminum is cryolite, and the electrolyte solid waste material can be used in the invention.
In a preferred embodiment, the first solid waste and the first aluminum source are such that the composition of component a satisfies: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is 24-28. The preferable scheme is more beneficial to promoting slag melting and reducing the dosage of the efficient slag melting agent.
In a preferred embodiment, the second solid waste and the second aluminum source are such that the composition of component B satisfies: based on the compound mass content, (KF+AlF) 3 The value of +MgF)/(NaF+CaF) is in the range of 0.4 to 0.6. The preferable scheme is more beneficial to promoting slag melting and reducing the dosage of the efficient slag melting agent.
The first and second aluminum sources may be the same or different.
In a preferred embodiment, the first and second aluminum sources are each independently alumina.
In another preferred embodiment, the first and second aluminum sources are each independently alumina and aluminum ash. The aluminum ash is added as another solid waste, so that the utilization rate of the solid waste can be promoted.
Wherein preferably the particle size of component A is in the range of 200-350 μm and the particle size of component B is in the range of 70-100mm. The preferable scheme is more beneficial to promoting slag melting and reducing the dosage of the efficient slag melting agent.
Preferably, the mass ratio of component A to component B is from 0.3 to 0.5:1. The preferable scheme is more beneficial to promoting slag melting and reducing the dosage of the efficient slag melting agent.
In a second aspect, a method for preparing the efficient slag melting agent according to the first aspect is provided, which comprises the following steps:
(1) Preparing a component A and a component B according to the required composition;
(2) Mixing the component A, the component B and water, and heating and stirring; preferably heating at 30-55deg.C for 25-60min;
(3) Then filtering in a plate-and-frame filter to obtain filtrate and a filter cake;
(4) And (3) airing and ball pressing the filter cake to form the efficient slag melting agent.
Preferably, the method further comprises: and (3) tempering and removing impurities from the filtrate to prepare the industrial sodium chloride and lithium carbonate.
In a third aspect, the application of the efficient slag melting agent in steel smelting is provided, wherein the adding amount of the efficient slag melting agent is 0.1-0.7 kg/ton of iron or ton of steel. The efficient slag melting agent can be added in smelting processes of a converter, a refining furnace and the like to assist in slag formation and melting.
The present invention will be described in detail by examples.
Example 1
The efficient slag melting agent consists of a component A with the granularity of 200-350 mu m and a component B with the granularity of 70-100mm, wherein the mass ratio of the component A to the component B is 0.5:1; wherein, the component A and the component B are both composed of electrolyte obtained by electrolyzing aluminum and aluminum oxide. And the composition of component A satisfies: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is 24.8; the NaF content is 50%, the KF content is 1%, and the AlF content is 50% 3 15% MgF, 10% CaF, 1%. The composition of the component B satisfies the following conditions: based on the compound mass content, (KF+AlF) 3 A value of +MgF)/(NaF+CaF) of 0.6; the NaF content is 30%, the KF content is 1%, and the AlF content is 30% 3 The content of (2) was 10%, the content of MgF was 8%, and the content of CaF was 1%.
The preparation method comprises the following steps:
(1) Preparing a component A and a component B according to the required composition;
(2) Mixing the component A, the component B and water, and heating and stirring for 30min at 50 ℃;
(3) Then filtering in a plate-and-frame filter to obtain filtrate and a filter cake;
(4) And (3) airing and ball pressing the filter cake to form the efficient slag melting agent.
And (3) feeding molten steel tapped from the converter into a station LF, adding 3kg/t of lime steel and 2kg/t of slag modifier in the feeding and slagging process, simultaneously adding 0.6kg/t of efficient slag modifier, and continuously refining after high-power transmission for about 3 minutes until the molten steel is qualified and discharged. Compared with the comparison result without adding the efficient slag melting agent under the same feed condition, the slag melting speed is improved by 45%, and the addition amount of the efficient slag melting agent is reduced by 40% compared with that of fluorite.
Example 2
The procedure of example 1 was followed, except that the composition of component A was different, specifically, the composition of component A was such that: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is 31.5; the NaF content is 60%, the KF content is 5%, and the AlF content is 3 The content of (2) is 20%, the content of MgF is 10%, and the content of CaF is 1%.
Correspondingly, compared with a comparison result without adding the efficient slag melting agent under the same feeding condition, the slag melting speed is improved by 38%, and the addition amount of the efficient slag melting agent is reduced by 35% compared with that of fluorite.
Example 3
The procedure of example 1 was followed, except that the composition of component B was different, specifically, the composition of component B satisfied: based on the compound mass content, (KF+AlF) 3 A value of +MgF)/(NaF+CaF) of 0.76; the NaF content is 40%, the KF content is 2%, and the AlF content is 40% 3 The content of (2) was 20%, the content of MgF was 10%, and the content of CaF was 2%.
Correspondingly, compared with a comparison result without adding the efficient slag melting agent under the same feeding condition, the slag melting speed is improved by more than 40%, and the addition amount of the efficient slag melting agent is reduced by more than 32% compared with that of fluorite.
Example 4
The procedure of example 1 was followed, except that the particle size of component A was 400-500. Mu.m, and the particle size of component B was 10-30mm.
Correspondingly, the comparison result of the embodiment and the condition of the same feed without adding the efficient slag melting agent shows that the slag melting speed is improved by more than 35%, and the addition amount of the efficient slag melting agent is reduced by more than 30% compared with that of fluorite.
Comparative example 1
The procedure of example 1 was followed, except that the composition of component A was different, specifically, the composition of component A was such that: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2)]The value of/CaF is 9.6; the NaF content is 55%, the KF content is 1%, and the AlF content is 55% 3 The content of (2) is 20%, the content of MgF is 10%, and the content of CaF is 3%.
Correspondingly, the comparison result of the comparison example and the comparison result without adding the efficient slag melting agent under the same feeding condition shows that the slag melting speed is improved by 10 percent, and the addition amount of the efficient slag melting agent is reduced by 8 percent compared with that of fluorite.
Comparative example 2
The procedure of example 1 was followed, except that the composition of component B was different, specifically, the composition of component B satisfied: based on the compound mass content, (KF+AlF) 3 The value of +MgF)/(NaF+CaF) is 1; the NaF content is 30%, the KF content is 2%, and the AlF content is 2% 3 The content of (2) was 20%, the content of MgF was 10%, and the content of CaF was 2%.
Correspondingly, the comparison result of the comparison example and the comparison result without adding the high-efficiency slag melting agent under the same feeding condition shows that the slag melting speed is improved by more than 7 percent, and the addition amount of the high-efficiency slag melting agent is reduced by more than 12 percent compared with that of fluorite.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (5)
1. The efficient slag melting agent is characterized by comprising a component A with the granularity of 200-350 mu m and a component B with the granularity of 70-100mm, wherein the mass ratio of the component A to the component B is 0.3-0.8:1; wherein, the component A comprises a first solid waste and a first aluminum source, and the component B comprises a second solid waste and a second aluminum source; the first aluminum source and the second aluminum source are both aluminum oxide; the first solid waste and the second solid waste are electrolyte obtained by electrolyzing aluminum, and
the first solid waste and the first aluminum source are such that the composition of component a satisfies: based on the mass content of the compound, [ ((NaF+KF) ×0.3+AlF) 3 ×0.5+MgF×0.2）]The value of/CaF is 24-28;
the second solid waste and the second aluminum source are such that the composition of component B satisfies: based on the compound mass content, (KF+AlF) 3 The value of +MgF)/(NaF+CaF) is in the range of 0.4 to 0.6.
2. The efficient slag melting agent as set forth in claim 1, wherein the mass ratio of the component A to the component B is 0.3-0.5:1.
3. The method for preparing the efficient slag melting agent as claimed in claim 1 or 2, which is characterized by comprising the following steps:
(1) Preparing a component A and a component B according to the required composition;
(2) Mixing the component A, the component B and water, and heating and stirring;
(3) Then filtering in a plate-and-frame filter to obtain filtrate and a filter cake;
(4) And (3) airing and ball pressing the filter cake to form the efficient slag melting agent.
4. A method according to claim 3, further comprising: and (3) tempering and removing impurities from the filtrate to prepare the industrial sodium chloride and lithium carbonate.
5. Use of the efficient slag melting agent according to claim 1 or 2 in steel smelting, wherein the addition amount of the efficient slag melting agent is 0.1-0.7 kg/ton of iron or ton of steel.
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| RU2732027C1 (en) * | 2019-07-31 | 2020-09-10 | Общество с ограниченной ответственностью "ИЗОМЕТИКА" (ООО "ИЗОМЕТИКА") | Refining flux for out of furnace finishing of steel |
| 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 |
| CN114703339A (en) * | 2022-03-24 | 2022-07-05 | 新疆八钢佳域工业材料有限公司 | Novel slagging agent for refining furnace |
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