CN115341056A - Rare earth nano metallurgy smelting agent - Google Patents
Rare earth nano metallurgy smelting agent Download PDFInfo
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- CN115341056A CN115341056A CN202211008571.0A CN202211008571A CN115341056A CN 115341056 A CN115341056 A CN 115341056A CN 202211008571 A CN202211008571 A CN 202211008571A CN 115341056 A CN115341056 A CN 115341056A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/02—General features in the manufacture of pig-iron by applying additives, e.g. fluxing 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
- 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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Abstract
The invention relates to a rare earth nano metallurgical smelting agent, belonging to the technical field of metallurgical solvents. The rare earth nano metallurgy smelting agent is prepared from the following components: na (Na) 2 20 to 35 portions of O, caCO 3 20-30 parts of MgCO 3 1-9 parts of Al 2 O 3 2-6 parts of SiO 2 5-15 parts of, P 2 O 5 1-9 parts, K 2 1-6 parts of O, tiO 2 0.3-3 parts of lanthanide rare earth, 0.2-5 parts of lanthanide rare earth and 5-10 parts of water, and the components are uniformly stirred, granulated and dried to be packaged. The invention can play the roles of ensuring stable and smooth operation, high yield and low consumption in the smelting production process of the blast furnace, reducing the content of s in molten iron and the content of iron in slag and the like in the smelting production of the medium and small blast furnaces; the phenomenon of furnace washing by fluorite or manganese ore can be reduced or avoided; the rare earth nano metallurgical smelting agent has the advantages of small investment, simple operation, no environmental pollution, no erosion to the wall of a blast furnace, improvement on the quality of molten iron and the like.
Description
Technical Field
The invention relates to the technical field of metallurgical solvents, in particular to a rare earth nano metallurgical smelting agent.
Background
The conditions of high production and energy consumption, unstable S content in molten iron, high Fe content in slag and the like are influenced by the fact that frequent furnace conditions are not smooth due to the reasons of impurity of fed materials, low quality of sintering ores and the like in the current blast furnace ironmaking production in China, particularly the production of medium and small blast furnaces.
Therefore, the rare earth nano metallurgy smelting agent which has the advantages of small investment, simple operation, no environmental pollution, no corrosion to the blast furnace wall, improvement of the quality of molten iron and the like is provided, and the problem to be solved by the technical personnel in the field is needed urgently.
Disclosure of Invention
In view of the above, the invention provides the rare earth nano metallurgy smelting agent which has the advantages of small investment, simple operation, no environmental pollution, no corrosion to the blast furnace wall, improvement on the quality of molten iron and the like.
In order to achieve the above object, the present invention provides the following technical solutions, which mainly include:
the rare earth nano metallurgy smelting agent is prepared from the following components: na (Na) 2 20 to 35 portions of O, caCO 3 20 to 30 portions of MgCO 3 1-9 parts of Al 2 O 3 2-6 parts of SiO 2 5-15 parts of, P 2 O 5 1-9 parts, K 2 1-6 parts of O, tiO 2 0.3-3 parts of lanthanide rare earth, 0.2-5 parts of lanthanide rare earth and 5-10 parts of water, and the components are uniformly stirred, granulated and dried to be packaged.
Preferably, the rare earth nano metallurgy smelting agent is prepared from the following components: na (Na) 2 O20 parts of CaCO 3 20 portions of MgCO 3 5 parts of Al 2 O 3 3 parts of SiO 2 7 parts of, P 2 O 5 2 parts of, K 2 O2 part, tiO 2 1 part of lanthanide rare earth, 1 part of lanthanide rare earth and 6 parts of water, stirring uniformly, granulating and drying to obtain a material to be fed; after the rare earth nano metallurgical smelting agent is put into the furnace, the molten iron has good fluidity, the physical heat of the molten iron is high, and the iron runner and the iron ladle cover are obviously reduced; the adding proportion is 0.1kg/T; the effects of stable and smooth running, low consumption and high yield are achieved.
Preferably, the rare earth nano metallurgy smelting agent avoids the phenomenon of softening in advance in a high-temperature area by improving the ternary alkalinity of the solvent, the softening interval becomes narrow, the position of a reflow zone is reduced, the slag discharging temperature is increased, and the phenomenon of gas flow blockage is reduced.
Preferably, the rare earth nano metallurgy smelting agent has the advantages that SiO2 in the catalyst has slagging chemical reaction speed and reduces slagging melting point, slag and iron separation speed is accelerated in a dripping zone, the viscosity of dripping slag and iron is reduced, and the phenomenon that coal gas flow rises is hindered is avoided, so that a furnace hearth is activated, the heat efficiency is improved, and the stable and smooth operation of a blast furnace is kept.
Preferably, the rare earth nano metallurgical smelting agent contains CaO and MgO, and the blast furnace desulfurization reaction: (FeS + CaO + C = Fe + CaS + Co) and can improve the ternary alkalinity of the solvent, and because the S removal is an endothermic reaction, the proper temperature and the relatively high temperature of molten iron are kept, so that the endothermic reaction and the ion diffusion of the S removal are promoted, and the S removal is facilitated.
According to the technical scheme, compared with the prior art, the method has the effects of enabling the blast furnace to run stably and smoothly in the smelting production process of the medium and small blast furnaces, achieving high yield and low consumption, reducing the content of s in molten iron and the content of iron in slag and the like; the phenomenon of furnace washing by fluorite or manganese ore can be reduced or avoided; the rare earth nano metallurgical smelting agent has the advantages of small investment, simple operation, no environmental pollution, no erosion to the wall of a blast furnace, improvement on the quality of molten iron and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a diagram of a lining of a comparative example of the present invention.
FIG. 2 is a drawing of molten iron smelting according to a comparative example of the present invention.
FIG. 3 is a furnace lining map after the present invention is used.
FIG. 4 is a drawing of molten iron smelting using the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Comparative example
As shown in fig. 1-2, during the smelting production process of medium and small blast furnaces without adding rare earth nanometer metallurgical smelting agent, the attached residues in the ladle are hung on the inner wall of the furnace lining, so that the quality of the sintered ore is low, and the frequent furnace conditions are not smooth, thereby affecting the conditions of high production and energy consumption, unstable S content in the molten iron, high Fe content in the slag and the like.
Example one
Na2O (20 parts), caCO3 (20 parts), mgCO3 (5 parts), al2O3 (3 parts), siO2 (7 parts), P2O5 (2 parts), K2O (2 parts), tiO2 (1 part), lanthanide rare earth (1 part) and water (6 parts), and the components are stirred uniformly, granulated and dried, namely, the materials are fed. After the rare earth nano metallurgical smelting agent is put into the furnace, the molten iron has good fluidity, the physical heat of the molten iron is high, and the iron runner and the iron ladle cover are obviously reduced. The addition ratio was 0.1kg/T. The effects of stable and smooth running, low consumption and high yield are achieved.
Aiming at the crux that the smooth operation of the blast furnace is influenced by the reflow zone and the dripping zone, the invention avoids the phenomenon of softening in advance in a high-temperature area by improving the ternary alkalinity of the solvent, the softening interval becomes narrow, the position of the reflow zone is reduced, the slag discharging temperature is increased, and the phenomenon of gas flow blockage is reduced; meanwhile, siO2 in the catalyst has a slagging chemical reaction speed and reduces a slagging melting point, the slag-iron separation speed is accelerated in a dripping zone, the viscosity of the dripping slag-iron is reduced, and the phenomenon that gas flow is hindered from rising is avoided, so that the purposes of activating a hearth, improving the heat efficiency and keeping a blast furnace stable and smooth are achieved.
The invention contains CaO and MgO, and the blast furnace desulfurization reaction: (FeS + CaO + C = Fe + CaS + Co) and can improve the ternary alkalinity of the solvent, and because the S removal is an endothermic reaction, the proper temperature and the relatively high temperature of molten iron are kept, so that the endothermic reaction and the ion diffusion of the S removal are promoted, and the S removal is facilitated. The improvement of the alkalinity reduces the viscosity of the slag and improves the fluidity of the molten iron and the slag, thereby having the desulfurization effect.
Example two
Na2O (35 parts), caCO3 (30 parts), mgCO3 (9 parts), al2O3 (6 parts), siO2 (15 parts), P2O5 (9 parts), K2O (6 parts), tiO2 (3 parts), lanthanide rare earth (5 parts) and water (10 parts), and the components are stirred uniformly, granulated and dried, namely the materials are fed. After the rare earth nano metallurgical smelting agent is put into the furnace, the molten iron has good fluidity, the physical heat of the molten iron is high, and the iron runner and the iron ladle cover are obviously reduced. The addition ratio was 0.2kg/T. The effects of stable and smooth running, low consumption and high yield are achieved.
Aiming at the crux that the smooth operation of the blast furnace is influenced by the reflow zone and the dripping zone, the invention avoids the phenomenon of softening in advance in a high-temperature area by improving the ternary alkalinity of the solvent, the softening interval becomes narrow, the position of the reflow zone is reduced, the slag discharging temperature is increased, and the phenomenon of gas flow blockage is reduced; meanwhile, siO2 in the catalyst has slagging chemical reaction speed and reduces slagging melting point, the slag-iron separation speed is accelerated in a dripping zone, the viscosity of dripping slag-iron is reduced, and the phenomenon that coal gas flow is hindered from rising is avoided, so that a furnace hearth is activated, the heat efficiency is improved, and the stability and the smoothness of a blast furnace are kept.
The invention contains CaO and MgO, and the blast furnace desulfurization reaction: (FeS + CaO + C = Fe + CaS + Co) and can improve the ternary alkalinity of the solvent, and because the S removal is an endothermic reaction, the proper temperature and the relatively high temperature of molten iron are kept, so that the endothermic reaction and the ion diffusion of the S removal are promoted, and the S removal is facilitated. The improvement of the alkalinity reduces the viscosity of the slag and improves the fluidity of the molten iron and the slag, thereby having the desulfurization effect.
EXAMPLE III
Na2O (28 parts), caCO3 (22 parts), mgCO3 (6 parts), al2O3 (3 parts), siO2 (6 parts), P2O5 (2 parts), K2O (3 parts), tiO2 (1 part), lanthanide rare earth (0.5 part) and water (5 parts), and the components are stirred uniformly, granulated, dried and then fed. After the rare earth nano metallurgy smelting agent is added, the molten iron has good fluidity, the physical heat of the molten iron is high, and the iron runner and the iron ladle cover are obviously reduced. The addition ratio was 0.3kg/T. The effects of stable and smooth running, low consumption and high yield are achieved.
Aiming at the crux that the smooth operation of the blast furnace is influenced by the reflow zone and the dripping zone, the invention avoids the phenomenon of softening in advance in a high-temperature area by improving the ternary alkalinity of the solvent, the softening interval becomes narrow, the position of the reflow zone is reduced, the slag discharging temperature is increased, and the phenomenon of gas flow blockage is reduced; meanwhile, siO2 in the catalyst has slagging chemical reaction speed and reduces slagging melting point, the slag-iron separation speed is accelerated in a dripping zone, the viscosity of dripping slag-iron is reduced, and the phenomenon that coal gas flow is hindered from rising is avoided, so that a furnace hearth is activated, the heat efficiency is improved, and the stability and the smoothness of a blast furnace are kept.
The invention contains CaO and MgO, and the blast furnace desulfurization reaction comprises the following steps: (FeS + CaO + C = Fe + CaS + Co) and can improve the ternary alkalinity of the solvent, and because the S removal is an endothermic reaction, the proper temperature and the relatively high temperature of molten iron are kept, so that the endothermic reaction and the ion diffusion of the S removal are promoted, and the S removal is facilitated. The improvement of the alkalinity reduces the viscosity of the slag and improves the fluidity of the molten iron and the slag, thereby having the desulfurization effect.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The rare earth nano metallurgy smelting agent is characterized by being prepared from the following components: na (Na) 2 20 to 35 portions of O, caCO 3 20 to 30 portions of MgCO 3 1-9 parts of Al 2 O 3 2-6 parts of SiO 2 5 to 15 parts of P 2 O 5 1-9 parts, K 2 1-6 parts of O, tiO 2 0.3-3 parts of lanthanide rare earth, 0.2-5 parts of lanthanide rare earth and 5-10 parts of water, and the components are uniformly stirred, granulated and dried to be packaged.
2. The rare earth nano metallurgical smelting agent according to claim 1, which is prepared from the following components: na (Na) 2 O20 parts of CaCO 3 20 parts of MgCO 3 5 parts of Al 2 O 3 3 parts of SiO 2 7 parts of, P 2 O 5 2 parts of, K 2 O2 part, tiO 2 1 part of lanthanide rare earth, 1 part of lanthanide rare earth and 6 parts of water, stirring uniformly, granulating and drying to obtain a material to be fed; after the rare earth nano metallurgical smelting agent is added, the molten iron has good fluidity, the physical heat of the molten iron is high, and the iron runner and the iron ladle cover are obviously reduced; the adding proportion is 0.1kg/T; to achieveThe effects of stable and smooth running, low consumption and high yield are achieved.
3. The rare earth nano metallurgy smelting agent according to claim 2, wherein the rare earth nano metallurgy smelting agent avoids the phenomenon of early softening in a high-temperature area by improving the ternary alkalinity of the solvent, the softening interval is narrowed, the position of a reflow zone is lowered, the slag discharging temperature is raised, and the phenomenon of gas flow blockage is reduced.
4. The rare earth nano metallurgy smelting agent according to claim 2, wherein SiO2 in the catalyst has a slagging chemical reaction speed and reduces a slagging melting point, a slag-iron separation speed is increased in a dripping zone, the viscosity of the dripping slag-iron is reduced, and the phenomenon that gas flow is prevented from rising is avoided, so that a hearth is activated, the heat efficiency is improved, and a blast furnace is kept to run stably.
5. The rare earth nano-metallurgical smelting agent according to claim 2, wherein the rare earth nano-metallurgical smelting agent contains CaO, mgO, and is characterized in that the ratio of the CaO to the MgO in the blast furnace desulfurization reaction: (FeS + CaO + C = Fe + CaS + Co) and can improve the ternary alkalinity of the solvent, and because the S removal is an endothermic reaction, the proper temperature and the relatively high temperature of molten iron are kept, so that the endothermic reaction and the ion diffusion of the S removal are promoted, and the S removal is facilitated.
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| CN202211008571.0A CN115341056A (en) | 2022-08-22 | 2022-08-22 | Rare earth nano metallurgy smelting agent |
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| CN202211008571.0A CN115341056A (en) | 2022-08-22 | 2022-08-22 | Rare earth nano metallurgy smelting agent |
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Citations (7)
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| CN1818093A (en) * | 2006-03-08 | 2006-08-16 | 许震 | High-efficient metallurgical refiner and preparation thereof |
| US20130333518A1 (en) * | 2011-03-31 | 2013-12-19 | Masamitsu Wakoh | Environmentally friendly flux for molten steel desulfurization |
| CN104878160A (en) * | 2015-06-25 | 2015-09-02 | 王明军 | Alloy liquid purification agent |
| CN104894337A (en) * | 2014-03-07 | 2015-09-09 | 江苏天工工具有限公司 | Steelmaking fluxing agent and fluxing method thereof |
| CN112522471A (en) * | 2020-11-19 | 2021-03-19 | 山东工业职业学院 | Composite sintered slag power promoter for converter steady-state smelting 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 |
| CN114622052A (en) * | 2022-03-21 | 2022-06-14 | 北京科技大学 | Molten iron dephosphorization agent, preparation method thereof and molten iron dephosphorization method |
-
2022
- 2022-08-22 CN CN202211008571.0A patent/CN115341056A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818093A (en) * | 2006-03-08 | 2006-08-16 | 许震 | High-efficient metallurgical refiner and preparation thereof |
| US20130333518A1 (en) * | 2011-03-31 | 2013-12-19 | Masamitsu Wakoh | Environmentally friendly flux for molten steel desulfurization |
| CN104894337A (en) * | 2014-03-07 | 2015-09-09 | 江苏天工工具有限公司 | Steelmaking fluxing agent and fluxing method thereof |
| CN104878160A (en) * | 2015-06-25 | 2015-09-02 | 王明军 | Alloy liquid purification agent |
| CN112522471A (en) * | 2020-11-19 | 2021-03-19 | 山东工业职业学院 | Composite sintered slag power promoter for converter steady-state smelting 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 |
| CN114622052A (en) * | 2022-03-21 | 2022-06-14 | 北京科技大学 | Molten iron dephosphorization agent, preparation method thereof and molten iron dephosphorization method |
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| Title |
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| 车传仁等: "有色金属冶金学", 冶金工业出版社, pages: 394 - 395 * |
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