CN111334644A - Fluorine-free refining fluxing slag melting agent and preparation and use method thereof - Google Patents
Fluorine-free refining fluxing slag melting agent and preparation and use method thereof Download PDFInfo
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- CN111334644A CN111334644A CN202010166199.0A CN202010166199A CN111334644A CN 111334644 A CN111334644 A CN 111334644A CN 202010166199 A CN202010166199 A CN 202010166199A CN 111334644 A CN111334644 A CN 111334644A
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- 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
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a fluorine-free refining fluxing and slagging agent and a preparation method and a use method thereof. Aiming at the problems of high production cost and complex preparation process of the existing fluorine-free slagging agent, the invention provides a fluorine-free refining fluxing slagging agent, which comprises the following components: by weight percentage, 40-60% of main raw material continuous casting residue tailings, 20-40% of ferrovanadium smelting corundum slag and 8-20% of industrial barium carbonate; the composite material also comprises an auxiliary material forming binding agent accounting for 3-4% of the total mass of the main raw materials. The invention also provides a preparation method and a using method of the slagging agent. The invention has good slag-melting and slag-forming effects, can effectively replace fluorite and reduce the production cost. The invention adopts a dry-method ball pressing mode, determines proper ball pressing parameters through tests, has simple production process, high efficiency and low cost, and is suitable for industrial application.
Description
Technical Field
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a fluorine-free refining fluxing and slagging agent and a preparation method and a use method thereof.
Background
Fluorite is widely used as a conventional fluxing agent for slagging because the fluorite rapidly melts the slag. But fluorite can aggravate the erosion to the furnace lining and influence the furnace life while rapidly melting slag; meanwhile, the slag system has low viscosity, is not beneficial to submerged arc operation, and causes radiation erosion of electric arc to the lining; under the action of high temperature and slag, fluoride in fluorite is partially changed into volatile matters (SiF4 and HF), which not only has corrosion effect on equipment and human bodies, but also causes environmental pollution to air and water; secondly, the reserves of fluorite in China are about 6000 million tons, the mineable age limit of the fluorite resources in China is about 40 years according to relevant prediction, but with the rapid development of the industries such as steel, aluminum smelting, chemical engineering and the like in China in recent years, the demand of the fluorite is increased sharply, the age limit is predicted to be further shortened, and the phenomenon that the fluorite resources are in short supply in the middle and the next 21 century in China is caused.
In view of the environmental pollution and the diminishing reserves of fluorite, the foreign ferrous metallurgy industry has little or no use of fluorite. At present, most steel grades in steel smelting mainly adopt an aluminum deoxidation process, and a refining slag system is also selected from CaO-Al2O3A basic slag system. CaO-Al from the viewpoint of environmental protection and material consumption resistance2O3The basic low-fluorine or fluorine-free refining mode is a problem which needs to be solved urgently at present in steel mills. To achieve this, there are two main ways to do so: firstly, the existing refining final slag composition is adjusted to reach the proper C/A (CaO/Al)2O3) The value is that a fluorine-free refining mode with low melting point and strong fluidity is realized; and other harmless or less harmful fluxing agents are selected to replace fluorite. In the early stage, fluorine-free refining is realized by adjusting the C/A value of the ladle slag, and three ways are adopted: mode 1 is to add metallic aluminum material to the slag surface, and mode 2 is to add high Al content2O3Pre-melting slag with low melting point, and adding bauxite or corundum slag in a mode 3. The mode 1 and the mode 2 have good slag melting effect, but have high cost, and the mode 3 has the defects of low slag feeding speed and large raw material quality fluctuation (bauxite nitrogen and corundum slag MgO), so that the requirement of field production cannot be met. The mode of adjusting the C/A value is stopped after running for a period of time, and the CaF is recovered2-CaO-Al2O3The primary dilemma is faced with the primary refining process.
Therefore, in order to change the current situation, the development of a new refining slagging fluxing agent to replace fluorite is an urgent problem to be solved in the industry at present.
Patent CN109825666A discloses a formulation of a fluoride-free slag melting agent and a preparation method thereof, wherein the formulation of the fluoride-free slag melting agent comprises the following components in percentage by mass: the main raw materials comprise 15 to 30 percent of continuous casting residue and tailings, 50 to 65 percent of ferrovanadium smelting corundum slag, 5 to 15 percent of industrial sodium carbonate and 3 to 8 percent of metal aluminum particles; the auxiliary material forming binding agent accounts for 1-5% of the total mass of the main raw material; the preparation method of the fluoride-free slagging agent also comprises the following steps: dry mixing and stirring materials in the first step, wet mixing and stirring materials in the second step, cold press molding in the third step, primary screening in the fourth step, natural drying in the fifth step, baking and drying in the sixth step, and final screening in the seventh step. The patent is an ideal substitute of a natural fluorite slagging agent in a steelmaking process. The melting point is low, the melting speed is high, the auxiliary slagging effect is good, the problems of fluorite erosion resistance and environmental pollution are effectively solved, the steelmaking refining slagging effect is improved, the smelting cost is reduced, and the defects of the prior art are overcome. However, the wet ball pressing method is adopted in the patent, so that the production is complicated, and the yield is not high; in addition, the production cost of the patent is high, and the patent is not suitable for industrial application.
Patent CN105950819A discloses a fluorine-free composite slagging agent for a converter and a preparation method thereof, wherein the fluorine-free composite slagging agent is prepared from the following raw materials in parts by weight: 29-41 parts of bauxite, 11-19 parts of borosillimanite, 8-12 parts of ceramic polishing waste residues, 10-15 parts of antigorite, 6-12 parts of titanium dioxide, 13-21 parts of pyrophyllite, 7-13 parts of aluminum ash, 14-22 parts of dickite, 4-8 parts of soda ash, 10-15 parts of manganese-rich slag, 5-8 parts of magnesium chloride and 9-14 parts of quick lime. The fluoride-free composite slagging agent is prepared by mutually compounding raw materials such as bauxite, borosillimanite, ceramic polishing waste residues, antigorite, manganese-rich slag and the like, has the advantages of good slagging effect, short slagging time, environmental friendliness and the like, can replace fluorite to realize fluoride-free slagging, is not easy to corrode a furnace lining and a ladle lining, contains partial iron oxide, is beneficial to slagging, can ensure that the content of iron oxide in early-stage slag is high, is beneficial to early-stage dephosphorization, and has remarkable economic benefit and social benefit.
Patent CN102703639A discloses a fluoride-free slagging agent, which takes bauxite as main raw material, takes silica, fluoride-free iron-containing compound and quicklime as auxiliary materials, and controls the content of active ingredients of the bauxite within the following range through the auxiliary materials: calculated by weight percentage of the fluoride-free slag melting agent, Al2O343～50％、SiO211～13％、Fe2O315-20% and CaO 2-4%. The invention solves the problem that the existing fluorine-containing slagging agent is environment-friendlyWhen the fluoride-free slagging agent is actually used, the slag dumping is free of slag blocks, the slag flows, the end-point slag is free of the phenomenon of anti-drying, the slag dumping flow is free of iron filings, the amount of iron water carried in slag during slag dumping is small, and compared with the conventional fluoride-containing slagging agent, the fluoride-free slagging agent reduces the steel consumption per ton of steel by 4-5 kg/t and is more environment-friendly. The slagging agent in the two patents is mainly used in a converter, cannot be used for refining, and cannot provide support for the development of refining fluxing slag.
Therefore, the existing fluoride-free slagging agent for refining has the problems of high production cost, complex flow and the like, and the development of an economic, practical and simply prepared fluoride-free slagging agent is urgently needed to meet the production requirement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing fluoride-free slagging agent has the problems of high production cost and complex preparation process.
The technical scheme for solving the technical problems comprises the following steps: provides a fluorine-free refining fluxing slag agent, which comprises the following components: by weight percentage, 40-60% of main raw material continuous casting residue tailings, 20-40% of ferrovanadium smelting corundum slag and 8-20% of industrial barium carbonate; the composite material also comprises an auxiliary material forming binding agent accounting for 3-4% of the total mass of the main raw materials.
Wherein in the fluorine-free refining fluxing slag agent, the tailings of the continuous casting residue are 35-50% of CaO, less than or equal to 5% of FeO and Al2O3:20～30％，SiO2Less than or equal to 15 percent and less than or equal to 10 percent of MgO.
Wherein, in the fluoride-free refining fluxing slag agent, the corundum slag for ferrovanadium smelting is CaO which is less than or equal to 10 percent, and Al2O3≥60％，SiO2Corundum slag with the weight percent of less than or equal to 5 percent and MgO less than or equal to 20 percent.
Wherein, in the fluorine-free refining fluxing and slagging agent, the particle size of the main raw material is 0-3 mm.
In the fluorine-free refining fluxing and slagging agent, the auxiliary material forming binding agent consists of 40-55% of bentonite and 45-60% of cement.
The invention also provides a preparation method of the fluorine-free refining fluxing slag agent, which comprises the following steps:
a. stirring and mixing 40-60% of continuous casting residue tailings, 20-40% of ferrovanadium smelting corundum slag and 8-20% of industrial barium carbonate for 5-7 min, adding an auxiliary material forming binding agent, and stirring and mixing for 3-5 min to prepare a dry mixture;
b. and (3) pressing the dry mixture into balls by using a powerful ball press to prepare a ball blank, and screening the ball blank with the particle size of more than or equal to 5mm to obtain the fluorine-free refined fluxing slag agent balls.
In the preparation method of the fluorine-free refining fluxing and slagging agent, the specification of the pellet billet in the step b is 20-35 mm.
In the preparation method of the fluorine-free refining fluxing and slagging agent, the control pressure during ball pressing in the step b is 8-12 MPa.
The invention also provides a using method of the fluorine-free refining slagging fluxing agent, which comprises the following steps:
when the converter is subjected to tapping slag washing, adding a fluorine-free refining slag melting agent according to 10-15% of the added lime amount of the tapping slag washing, and adding a rear small platform and stirring for 2-3 min with large-gas-amount argon; in the LF station entering heating process, a fluorine-free refining slagging agent is added according to 10 percent of the added lime amount, and then the slag is heated and melted.
The invention has the beneficial effects that:
the invention provides a fluorine-free refining fluxing slag melting agent and a preparation method and a use method thereof. The invention adopts a dry-method ball pressing mode, determines proper ball pressing parameters through tests, has simple production process, high efficiency and low cost, and is suitable for industrial application.
Detailed Description
The invention provides a fluorine-free refining fluxing slag melting agent, which comprises the following components: by weight percentage, 40-60% of main raw material continuous casting residue tailings, 20-40% of ferrovanadium smelting corundum slag and 8-20% of industrial barium carbonate; the composite material also comprises an auxiliary material forming binding agent accounting for 3-4% of the total mass of the main raw materials.
Wherein, in the fluorine-free refining fluxing and slagging agent,the continuous casting residue and tailings comprise 35-50% of CaO, less than or equal to 5% of FeO, and Al2O3:20～30％，SiO2Less than or equal to 15 percent and less than or equal to 10 percent of MgO.
Wherein, in the fluoride-free refining fluxing slag agent, the corundum slag for ferrovanadium smelting is CaO which is less than or equal to 10 percent, and Al2O3≥60％，SiO2Corundum slag with the weight percent of less than or equal to 5 percent and MgO less than or equal to 20 percent.
Wherein, in the fluorine-free refining fluxing and slagging agent, the particle size of the main raw material is 0-3 mm.
In the fluorine-free refining fluxing and slagging agent, the auxiliary material forming binding agent consists of 40-55% of bentonite and 45-60% of cement.
The fluorine-free refining fluxing slag agent is prepared from the continuous casting residue tailings, the ferrovanadium smelting corundum slag and the industrial barium carbonate, the fluxing effect of the barium carbonate is good, the using amount of the continuous casting residue is increased, the cost is saved, the melting speed of the fluxing agent is higher, and the fluxing effect is better.
The invention also provides a preparation method of the fluorine-free refining fluxing slag agent, which comprises the following steps:
a. stirring and mixing 40-60% of continuous casting residue tailings, 20-40% of ferrovanadium smelting corundum slag and 8-20% of industrial barium carbonate for 5-7 min, adding an auxiliary material forming binding agent, and stirring and mixing for 3-5 min to prepare a dry mixture;
b. and (3) pressing the dry mixture into balls by using a powerful ball press to prepare a ball blank, and screening the ball blank with the particle size of more than or equal to 5mm to obtain the fluorine-free refined fluxing slag agent balls.
In the preparation method of the fluorine-free refining fluxing and slagging agent, the specification of the pellet billet in the step b is 20-35 mm.
In the preparation method of the fluorine-free refining fluxing and slagging agent, the control pressure during ball pressing in the step b is 8-12 MPa.
Particularly, the dry-method ball pressing is adopted, so that the operation is simpler, the conditions are easier to control, the influence of adverse weather in winter can be avoided, the balling rate is high, and the balling cost is further reduced.
The invention also provides a using method of the fluorine-free refining slagging fluxing agent, which comprises the following steps:
when the converter is subjected to tapping slag washing, adding a fluorine-free refining slag melting agent according to 10-15% of the added lime amount of the tapping slag washing, and adding a rear small platform and stirring for 2-3 min with large-gas-amount argon; in the LF station entering heating process, a fluorine-free refining slagging agent is added according to 10 percent of the added lime amount, and then the slag is heated and melted.
The following examples are intended to illustrate specific embodiments of the present invention without limiting the scope of the invention to the examples.
Example 1 the fluorine-free refining fluxing and slagging agent of the invention is used for slagging of M3A35 steel
Preparing pellets, specifically operating as follows:
a. 500kg of continuous casting residue tailings, 300kg of ferrovanadium smelting corundum slag and 160kg of industrial barium carbonate are stirred and mixed for 7min, auxiliary material forming binding agents (16kg of bentonite and 24kg of cement) are added, and stirring and mixing are carried out for 4min to prepare dry mixtures;
b. pressing the dry mixture into balls by a powerful ball press machine, wherein the pressure is 8MPa, and preparing a pellet blank with the specification of 30 mm; and sieving to remove the pellets with the particle size of more than or equal to 5mm for later use.
Adding the pellets according to 15% of the lime added during slag washing of the converter tapping, and adding the small-platform large-gas-volume argon and stirring for 2 min; the LF is added into the furnace according to 10 percent of the lime addition amount in the LF in-situ heating process.
The slagging time of the slag melting agent in the embodiment 1 is 2.5min, under the same conditions, the slagging time without the slag melting agent is 5min, and the slagging time with the slag melting agent in CN109825666A is 3 min.
Example 2 slagging of SAPH440-B Steel grade Using the fluorine-free refining fluxing and slagging agent of the present invention
Preparing pellets, specifically operating as follows:
a. 500kg of continuous casting residue tailings, 300kg of ferrovanadium smelting corundum slag and 160kg of industrial barium carbonate are stirred and mixed for 7min, auxiliary material forming binding agents (16kg of bentonite and 24kg of cement) are added, and stirring and mixing are carried out for 3min to prepare dry mixtures;
b. pressing the dry mixture into balls by a powerful ball press machine under the pressure of 10MPa to prepare a pellet blank with the specification of 20 mm; and sieving to remove the pellets with the particle size of more than or equal to 5mm for later use.
Adding the pellets according to 10% of the lime added during slag washing of the steel tapped from the converter, and stirring for 3min by adding the large-gas-amount argon on a rear small platform; the LF is added into the furnace according to 10 percent of the lime addition amount in the LF in-situ heating process.
The slagging time of the slag melting agent in the embodiment 2 is 3min, under the same conditions, the slagging time without the slag melting agent is 7min, and the slagging time with the slag melting agent in CN109825666A is 4 min.
Example 3 the fluorine-free refining fluxing and slagging agent of the invention is used for slagging of Q355 steel grade
Preparing pellets, specifically operating as follows:
a. 500kg of continuous casting residue tailings, 300kg of ferrovanadium smelting corundum slag and 160kg of industrial barium carbonate are stirred and mixed for 7min, auxiliary material forming binding agents (16kg of bentonite and 24kg of cement) are added, and stirring and mixing are carried out for 3.5min to prepare dry mixture;
b. pressing the dry mixture into balls by a powerful ball press machine under the pressure of 12MPa to prepare a pellet blank with the specification of 30 mm; and sieving to remove the pellets with the particle size of more than or equal to 5mm for later use.
Adding 13% of lime into the pellets during slag washing of converter tapping, and stirring for 2.5min by adding the small-platform large-gas-volume argon; the LF is added into the furnace according to 10 percent of the lime addition amount in the LF in-situ heating process.
The slagging time of the slag melting agent in the embodiment 3 is 3min, under the same conditions, the slagging time without the slag melting agent is 6min, and the slagging time with the slag melting agent in CN109825666A is 4 min.
Example 4P 280VK steel grade was slagging using the fluorine-free refining fluxing slag agent of the present invention
Preparing pellets, specifically operating as follows:
a. 500kg of continuous casting residue tailings, 300kg of ferrovanadium smelting corundum slag and 160kg of industrial barium carbonate are stirred and mixed for 7min, auxiliary material forming binding agents (16kg of bentonite and 24kg of cement) are added, and stirring and mixing are carried out for 5min to prepare dry mixtures;
b. pressing the dry mixture into balls by a powerful ball press machine, wherein the pressure is 9MPa, and preparing pellet billets with the specification of 25 mm; and sieving to remove the pellets with the particle size of more than or equal to 5mm for later use.
Adding the pellets according to 12% of the lime added during slag washing of the steel tapped from the converter, and stirring for 3min by adding the large-gas-amount argon on a rear small platform; the LF is added into the furnace according to 10 percent of the lime addition amount in the LF in-situ heating process.
The slagging time of the slag melting agent in the embodiment 4 is 2.5min, under the same conditions, the slagging time without the slag melting agent is 6min, and the slagging time with the slag melting agent in CN109825666A is 3.5 min.
Example 5P 550CL steel grade was slagging using the fluorine-free refining fluxing slag agent of the present invention
Preparing pellets, specifically operating as follows:
a. 500kg of continuous casting residue tailings, 300kg of ferrovanadium smelting corundum slag and 160kg of industrial barium carbonate are stirred and mixed for 7min, auxiliary material forming binding agents (16kg of bentonite and 24kg of cement) are added, and stirring and mixing are carried out for 4min to prepare dry mixtures;
b. pressing the dry mixture into balls by a powerful ball press machine, wherein the pressure is 11MPa, and preparing pellet billets with the specification of 35 mm; and sieving to remove the pellets with the particle size of more than or equal to 5mm for later use.
Adding 13% of lime added into the pellets during slag washing of converter tapping, and stirring for 3min by adding the small-platform large-gas-volume argon; the LF is added into the furnace according to 10 percent of the lime addition amount in the LF in-situ heating process.
The slagging time of the slag melting agent in the embodiment 5 is 3.5min, under the same conditions, the slagging time without the slag melting agent is 8min, and the slagging time with the slag melting agent in CN109825666A is 4.5 min.
Generally, the low alloy and ultra-low carbon steel starts to keep stable after 3 minutes of submerged arc until the heating is finished, and the heating curve of the deep desulfurization steel returns to be stable after 5 minutes because the slag layer is thick until the heating is finished.
From the aspect of field tracking, after the fluoride-free slagging agent is adopted, the slagging effect of the steel ladle is good, and the phenomenon of incrustation (incomplete) does not occur. The melting points of the ladle slag in the examples are shown in Table 1. It can be seen from the table that in the examples, the ladle slag is in a low melting point region after refining is finished (the temperature of the molten steel is 1570 ℃ or above), which shows that the slag melting and forming effects of the invention are good, and the melting point of the steel slag is effectively reduced.
TABLE 1 LF ladle slag melting point, deg.C
Claims (9)
1. The fluorine-free refining fluxing slag agent is characterized by comprising the following components: by weight percentage, 40-60% of main raw material continuous casting residue tailings, 20-40% of ferrovanadium smelting corundum slag and 8-20% of industrial barium carbonate; the composite material also comprises an auxiliary material forming binding agent accounting for 3-4% of the total mass of the main raw materials.
2. The fluorine-free refining fluxing slag agent of claim 1, wherein: the continuous casting residue and tailings comprise 35-50% of CaO, less than or equal to 5% of FeO, and Al2O3:20～30％，SiO2Less than or equal to 15 percent and less than or equal to 10 percent of MgO.
3. The fluorine-free refining fluxing slag agent of claim 1, wherein: the corundum slag for smelting ferrovanadium is less than or equal to 10 percent of CaO and Al2O3≥60％，SiO2Corundum slag with the weight percent of less than or equal to 5 percent and MgO less than or equal to 20 percent.
4. The fluorine-free refining fluxing slag agent of claim 1, wherein: the particle size of the main raw material is 0-3 mm.
5. The fluorine-free refining fluxing slag agent of claim 1, wherein: the auxiliary material forming binding agent is composed of 40-55% of bentonite and 45-60% of cement.
6. The method for preparing the fluorine-free refining fluxing slag agent of any one of claims 1 to 5, which is characterized by comprising the following steps:
a. stirring and mixing 40-60% of continuous casting residue tailings, 20-40% of ferrovanadium smelting corundum slag and 8-20% of industrial barium carbonate for 5-7 min, adding an auxiliary material forming binding agent, and stirring and mixing for 3-5 min to prepare a dry mixture;
b. and (3) pressing the dry mixture into balls by using a powerful ball press to prepare a ball blank, and screening the ball blank with the particle size of more than or equal to 5mm to obtain the fluorine-free refined fluxing slag agent balls.
7. The method for preparing the fluorine-free refining fluxing slag agent according to claim 6, wherein: and c, the specification of the pellet blank in the step b is 20-35 mm.
8. The method for preparing the fluorine-free refining fluxing slag agent according to claim 6, wherein: and c, controlling the pressure to be 8-12 MPa during ball pressing in the step b.
9. The use method of the fluorine-free refining fluxing slag agent of any one of claims 1 to 5, which is characterized by comprising the following steps:
when the converter is subjected to tapping slag washing, adding a fluorine-free refining slag melting agent according to 10-15% of the added lime amount of the tapping slag washing, and adding a rear small platform and stirring for 2-3 min with large-gas-amount argon; in the LF station entering heating process, a fluorine-free refining slagging agent is added according to 10 percent of the added lime amount, and then the slag is heated and melted.
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| CN112048634A (en) * | 2020-09-11 | 2020-12-08 | 四川兰德高科技产业有限公司 | Fluorine-free chlorine-free environment-friendly granular refining agent for aluminum alloy and preparation and application thereof |
| CN112680567A (en) * | 2020-12-09 | 2021-04-20 | 钢城集团凉山瑞海实业有限公司 | High-aluminum slag modifier for LF (ladle furnace) and preparation method thereof |
| CN113122680A (en) * | 2021-04-22 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel slag modifier and preparation and use methods thereof |
| CN113136480A (en) * | 2021-04-22 | 2021-07-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Ladle slag modifier and preparation and use method thereof |
| CN114369696A (en) * | 2022-01-14 | 2022-04-19 | 西安建筑科技大学 | Fluxing agent and use method thereof |
| CN115261617A (en) * | 2022-07-22 | 2022-11-01 | 北京科技大学 | LF refining slag recycling process and application thereof |
| CN115595404A (en) * | 2022-10-25 | 2023-01-13 | 攀枝花钢城集团有限公司（Cn） | Slagging agent for AOD furnace and preparation method thereof |
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| CN112048634A (en) * | 2020-09-11 | 2020-12-08 | 四川兰德高科技产业有限公司 | Fluorine-free chlorine-free environment-friendly granular refining agent for aluminum alloy and preparation and application thereof |
| CN112680567A (en) * | 2020-12-09 | 2021-04-20 | 钢城集团凉山瑞海实业有限公司 | High-aluminum slag modifier for LF (ladle furnace) and preparation method thereof |
| CN113122680A (en) * | 2021-04-22 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel slag modifier and preparation and use methods thereof |
| CN113136480A (en) * | 2021-04-22 | 2021-07-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Ladle slag modifier and preparation and use method thereof |
| CN114369696A (en) * | 2022-01-14 | 2022-04-19 | 西安建筑科技大学 | Fluxing agent and use method thereof |
| CN115261617A (en) * | 2022-07-22 | 2022-11-01 | 北京科技大学 | LF refining slag recycling process and application thereof |
| CN115261617B (en) * | 2022-07-22 | 2024-03-15 | 北京科技大学 | LF refining slag recycling technology and application thereof |
| CN115595404A (en) * | 2022-10-25 | 2023-01-13 | 攀枝花钢城集团有限公司（Cn） | Slagging agent for AOD furnace and preparation method thereof |
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