CN113737042A - Flux for smelting alloy and its preparing process and application - Google Patents

Flux for smelting alloy and its preparing process and application Download PDF

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Publication number
CN113737042A
CN113737042A CN202111116402.4A CN202111116402A CN113737042A CN 113737042 A CN113737042 A CN 113737042A CN 202111116402 A CN202111116402 A CN 202111116402A CN 113737042 A CN113737042 A CN 113737042A
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flux
alloy
smelting
acid compound
weight percent
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CN202111116402.4A
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CN113737042B (en
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夏宏梁
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Jiangsu Jiangnan Ferroalloy Co ltd
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Jiangsu Jiangnan Ferroalloy Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/023—Alloys based on nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention discloses a flux for smelting alloy, which comprises 60-70 wt% of CaF215 to 20 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 4-7. The manufacturing method is to mix the components of the flux evenly to obtain the required flux. When the flux is applied, the formula and the dosage of the flux can be adjusted according to different aluminum alloys, nickel alloys and titanium alloys. The flux can be matched with the flux which is suitable for the furnace lining operating environment according to the components in the smelting raw materials, and the feeding type of the flux is determined and controlled according to the condition of slag generated during smelting to adjust the feeding material; the added flux can reduce reoxidation of the alloy, easily absorb inclusions, and minimize reaction loss with the lining material, and can improve the quality of the manufactured steel product.

Description

Flux for smelting alloy and its preparing process and application
Technical Field
The invention relates to the technical field of smelting alloy, in particular to a fusing agent of smelting alloy which can be added into a smelting furnace to improve a furnace lining, a manufacturing method and application thereof.
Background
When the smelting alloy is produced, various impurities produced during smelting react with a used furnace lining, so that the phenomena of nodulation and melting loss are generated, and hidden troubles are brought to the components and the safety production of the smelting alloy. Meanwhile, the use time is shortened, and the production plan is seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a fusing agent which can be added into a smelting furnace to improve the smelting alloy of a furnace lining, a manufacturing method and application thereof.
The invention aims to solve the problems by the following technical scheme:
a flux for melting an alloy, characterized in that: the component of the flux is 60-70 wt% of CaF215 to 20 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 4-7.
The average particle size of the flux is 0.053 mm-0.150 mm.
The CaF2The particle size of (A) is 0.053 mm-0.106 mm.
The granularity of the CaO is 0.075 mm-0.150 mm.
The particle size of the weak acid compound is 0.075 mm-0.150 mm.
The weak acid compound is one or a combination of more of citric acid, malic acid and tartaric acid.
A method for producing a flux for melting an alloy, characterized by comprising: 60 to 70 weight percent of CaF with the granularity of 0.053 to 0.106mm215 to 20 weight percent of CaO with the granularity of 0.075 to 0.106mm, and 15 to 20 weight percent of weak acid compound with the granularity of 0.075 to 0.106mm are prepared according to the proportion of 100 percent and evenly mixed to prepare the required flux.
The application of the flux for smelting the alloy is characterized in that: when the flux is used for smelting aluminum alloy, the component of the flux is 60-61 wt% of CaF219 to 20 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 5-5.5; the adding amount of the fluxing agent is 0.1-0.5% of the smelting amount in the furnace when the alloy is smelted.
The application of the flux for smelting the alloy is characterized in that: when the flux is used for smelting nickel-based alloy, the component of the flux is CaF with the weight percentage of 65-70 percent215 to 20 weight percent of CaO, 15 to 20 weight percent of weak acid compoundThe sum of the weight percentage of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 4-7; the adding amount of the fluxing agent in the alloy smelting process is 0.1-0.2% of the smelting amount in the furnace.
The application of the flux for smelting the alloy is characterized in that: when the flux is used for smelting aluminum alloy, the component of the flux is CaF with 68wt% -70 wt%215 to 18 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 5-7; the adding amount of the fluxing agent in the alloy smelting process is 0.5-1.0% of the smelting amount in the furnace.
Compared with the prior art, the invention has the following advantages:
the flux can be matched with the flux which is suitable for the furnace lining operating environment according to the components in the smelting raw materials, and the feeding type of the flux is determined and controlled according to the condition of slag generated during smelting to adjust the feeding material; the added flux can reduce reoxidation of the alloy, easily absorb inclusions, and minimize reaction loss with the lining material, and can improve the quality of the manufactured steel product.
Detailed Description
The present invention will be further described with reference to the following examples.
In a smelting furnace, the following oxidation reactions generally take place: 4Al +3O2=2Al2O3、Si+O2=SiO2、2Mg+O2=2MgO、3Fe+2O2=Fe3O4、4P+5O2=2P2O5、Ti+O2=TiO2、2Mn+O2=2MnO, and other reactions: ti + C = TiC, 4Al +3SiO2=3Si+2Al2O3. The formulated flux generally needs to be specifically related to the specific composition of the flux depending on the reaction product.
The flux for smelting alloy consists of CaF in 60-70 wt% and granularity of 0.053-0.106 mm215 to 20 weight percent of CaO with the granularity of 0.075 to 0.106mm, and 15 to 20 weight percent of weak CaO with the granularity of 0.075 to 0.106mmAcid compounds, the sum of the weight percentage of the components is 100 percent; wherein the weak acid compound is one or more of citric acid, malic acid, and tartaric acid, and the pH value of the weak acid compound is 4-7 after heated and dissolved.
Example one melting of aluminum-based alloy
The composition of the flux used was: 60 to 61 weight percent of CaF219 to 20 weight percent of CaO, 15 to 20 weight percent of weak acid compound (pH value is 5 to 5.5), and the sum of the weight percentage of the components is 100 percent; the adding usage proportion is 0.1-0.5% of the smelting amount in the furnace during smelting.
When an induction furnace is adopted to smelt the aluminum-manganese alloy, the dosage of aluminum and manganese in the furnace is 2400 kg, and the used fluxing agent is 61wt% of CaF220wt% of CaO and 19wt% of malic acid (the pH value is 5), 4.8 kg of fusing agent is added during smelting, the fusing agent accounts for 0.2% of the adding amount of the alloy, the fusing agent is added while feeding during use, the fusing agent is also added after the feeding is finished, and after the alloy tapping temperature is reached, the slag on the surface is fished out and then the alloy is tapped.
Example two melting of a nickel-based alloy
The composition of the flux used was: 65wt% -70 wt% of CaF215 to 20 weight percent of CaO and 15 to 20 weight percent of weak acid compound (pH value is 4 to 7), wherein the sum of the weight percentages of the components is 100 percent; the adding usage proportion is 0.1-0.2% of the smelting amount in the furnace during smelting.
When an induction furnace is adopted to smelt the ferronickel alloy, the adding amount of ferronickel in the furnace is 3000 kilograms, and the used fusing agent comprises CaF with the weight percent of 65 percent220wt% of CaO and 15wt% of tartaric acid (the pH value is 4), 3 kg of flux which accounts for 0.1% of the adding amount of the alloy is added during smelting, the flux is added while feeding, the flux is also added after the flux is added, the slag is discharged from the furnace after the alloy tapping temperature is reached, and the surface slag is cleaned after the alloy is cooled.
Example III melting of titanium-based alloy
The composition of the flux used was: 68-70 wt% of CaF215 to 18 weight percent of CaO and 15 to 20 weight percent of weak acid compound (pH value is 5 to 7), wherein the sum of the weight percentages of the components is 100 percent; the adding usage proportion is 0.5-1.0% of the smelting amount in the furnace during smelting.
When the ferrotitanium alloy is smelted by adopting an induction furnace, the ferrotitanium adding amount in the furnace is 1000 kg, and the used fusing agent comprises 70wt% of CaF215wt% of CaO and 15wt% of malic acid (the pH value is 5), 8 kg of fusing agent is added during smelting, the fusing agent accounts for 0.8% of the adding amount of the alloy, the fusing agent is added while feeding during use, the fusing agent is also added after the feeding is finished, and after the alloy tapping temperature is reached, the slag on the surface is fished out and then the alloy is discharged.
The flux can be matched with the flux which is suitable for the furnace lining operating environment according to the components in the smelting raw materials, and the feeding type of the flux is determined and controlled according to the condition of slag generated during smelting to adjust the feeding material; the added flux can reduce reoxidation of the alloy, easily absorb inclusions, and minimize reaction loss with the lining material, and can improve the quality of the manufactured steel product.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention; the technology not related to the invention can be realized by the prior art.

Claims (10)

1. A flux for melting an alloy, characterized in that: the component of the flux is 60-70 wt% of CaF215 to 20 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 4-7.
2. A flux for melting an alloy as claimed in claim 1, wherein: the average particle size of the flux is 0.053 mm-0.150 mm.
3. A flux for melting an alloy as claimed in claim 1 or 2, wherein: the CaF2The particle size of (A) is 0.053 mm-0.106 mm.
4. A flux for melting an alloy as claimed in claim 1 or 2, wherein: the granularity of the CaO is 0.075 mm-0.150 mm.
5. A flux for melting an alloy as claimed in claim 1 or 2, wherein: the particle size of the weak acid compound is 0.075 mm-0.150 mm.
6. A flux for melting an alloy as claimed in claim 1 or 2, wherein: the weak acid compound is one or a combination of more of citric acid, malic acid and tartaric acid.
7. A method for producing a flux for melting an alloy, characterized by comprising: 60 to 70 weight percent of CaF with the granularity of 0.053 to 0.106mm215 to 20 weight percent of CaO with the granularity of 0.075 to 0.106mm, and 15 to 20 weight percent of weak acid compound with the granularity of 0.075 to 0.106mm are prepared according to the proportion of 100 percent and evenly mixed to prepare the required flux.
8. The application of the flux for smelting the alloy is characterized in that: when the flux is used for smelting aluminum alloy, the component of the flux is 60-61 wt% of CaF219 to 20 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 5-5.5; the adding amount of the fluxing agent is 0.1-0.5% of the smelting amount in the furnace when the alloy is smelted.
9. The application of the flux for smelting the alloy is characterized in that: when the flux is used for smelting nickel-based alloy, the component of the flux is CaF with the weight percentage of 65-70 percent215 to 20 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 4-7; the adding amount of the fluxing agent in the alloy smelting process is 0.1-0.2% of the smelting amount in the furnace.
10. Application of flux for smelting alloyThe method is characterized in that: when the flux is used for smelting titanium alloy, the component of the flux is CaF with 68wt% -70 wt%215 to 18 weight percent of CaO and 15 to 20 weight percent of weak acid compound, wherein the sum of the weight percentages of the components is 100 percent; wherein the pH value of the weak acid compound after being heated and dissolved is 5-7; the adding amount of the fluxing agent in the alloy smelting process is 0.5-1.0% of the smelting amount in the furnace.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1394449A (en) * 1972-12-01 1975-05-14 Reading Alloys Master alloy for titanium base alloys
JPS63270408A (en) * 1987-04-24 1988-11-08 Sumitomo Metal Ind Ltd Refining method for super clean steel
RU2108396C1 (en) * 1997-01-08 1998-04-10 Открытое акционерное общество "Западно-Сибирский металлургический комбинат" Method of pig iron desulfurization in induction furnace with acid lining
CN101054613A (en) * 2007-05-09 2007-10-17 北京科技大学 Fluxing agent for prerefining molten steel during tapping process
CN102643976A (en) * 2011-02-21 2012-08-22 宝山钢铁股份有限公司 Composite additive for producing nickel-iron particles by using laterite, and application method thereof
CN102747194A (en) * 2012-07-18 2012-10-24 河南通宇冶材集团有限公司 Fluoride-free environmental-friendly slag dilution solvent for electric furnace, converter and medium frequency furnace and preparation method of fluoride-free environmental-friendly slag dilution solvent

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1394449A (en) * 1972-12-01 1975-05-14 Reading Alloys Master alloy for titanium base alloys
JPS63270408A (en) * 1987-04-24 1988-11-08 Sumitomo Metal Ind Ltd Refining method for super clean steel
RU2108396C1 (en) * 1997-01-08 1998-04-10 Открытое акционерное общество "Западно-Сибирский металлургический комбинат" Method of pig iron desulfurization in induction furnace with acid lining
CN101054613A (en) * 2007-05-09 2007-10-17 北京科技大学 Fluxing agent for prerefining molten steel during tapping process
CN102643976A (en) * 2011-02-21 2012-08-22 宝山钢铁股份有限公司 Composite additive for producing nickel-iron particles by using laterite, and application method thereof
CN102747194A (en) * 2012-07-18 2012-10-24 河南通宇冶材集团有限公司 Fluoride-free environmental-friendly slag dilution solvent for electric furnace, converter and medium frequency furnace and preparation method of fluoride-free environmental-friendly slag dilution solvent

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
北京科技大学 毛裕文: "《冶金熔体》", 30 June 1994, 冶金工业出版社 *
宋进英等: "《板带钢质量缺陷特征与控制》", 30 June 2017, 冶金工业出版社 *
铸造词典编写组: "《铸造词典 第2版》", 31 May 1996, 机械工业出版社 *
陈襄武: "《炼钢过程的脱氧》", 30 November 1991, 冶金工业出版社 *

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