CN102304624A - Remelting slag for electroslag remelting plate blank and manufacturing method thereof - Google Patents
Remelting slag for electroslag remelting plate blank and manufacturing method thereof Download PDFInfo
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- CN102304624A CN102304624A CN2010101915476A CN201010191547A CN102304624A CN 102304624 A CN102304624 A CN 102304624A CN 2010101915476 A CN2010101915476 A CN 2010101915476A CN 201010191547 A CN201010191547 A CN 201010191547A CN 102304624 A CN102304624 A CN 102304624A
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- remelting
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- slab
- esr
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Abstract
The invention relates to remelting slag for an electroslag remelting plate blank and a manufacturing method thereof. The manufacturing method is characterized by comprising the following steps of: mixing 28 to 30 weight percent of lime, 30 to 32 weight percent of aluminum oxide, 39 to 41 weight percent of fluorite and 1 to 3 weight percent of magnesium oxide uniformly, premelting at the high temperature of 1,200 and 1,550 DEG C, and cooling and crushing to form granules of between 3 and 20 millimeters. The premolten remelting slag comprises the following chemical ingredients in percentage by weight: 39 to 41 percent of CaF2, 8 to 30 percent of CaO2, 32 to 34 percent of Al2O3, less than or equal to 0.01 percent of SiO2, less than or equal to 0.01 percent of P2O5, less than or equal to 0.01 percent of S and less than or equal to 0.01 percent of total carbon, wherein CaO/Al2O3 is 0.9 to 1.0. The invention has the advantages that: 1) the chemical ingredients of a remelting slag system in the process of remelting the plate blank are not deteriorated, and the slag system is stable relatively; and 2) the content of the fluorite in the components is low, so the pollution of fluorine on environment is reduced.
Description
Technical field
The present invention relates to ferrous metallurgy electroslag remelting process field, particularly a kind of remelting slag and method of manufacture thereof that is used for the esr slab.
Background technology
There are very big difference in esr slab and remelting circle base and special-shaped base, and its cross section of esr circle base is even, and relative cylinder charge is big; Whole ingot shape is less than normal; Basically all in 10t, the remelting time is short relatively, and its sectional dimension difference of esr slab is big; Flakiness ratio is big; Can reach 5～10, round relatively base, relative cylinder charge is little; Whole ingot shape is bigger than normal; Basically all more than 10t, even up to 200t, the remelting time is long relatively; Even reach 100h; Melting for a long time, slag system worsens serious, therefore; The esr slab requires strict more to slag system, some slag systems commonly used can not satisfy the requirement of remelting slab.
Electroslag remelting slag commonly used is binary slag system and ternary slag system, " pseudo-ginseng " slag system that the binary slag system is promptly commonly used: 70% CaF
2, 30% Al
2O
3, " pseudo-ginseng " slag ingredient is not on eutectic point, and there is the liquation problem in slag in the refrigerative process, cause Al in the first refrigerative slag crust
2O
3Too high levels, the later stage slag ingredient changes, thereby influences process stabilizing, and this slag system fluorite content is higher in addition, and in use fluoride pollution is serious.The ternary slag system is CaF
2-CaO-Al
2O
3Series, CaF
2Content basically all is higher than 50%, and high-content fluorite in use fluoride pollution is serious, in addition CaO and Al in the ternary slag system
2O
3Greater than there being free calcium oxide in 1.0 the slag system, be not suitable for the slab esr, other slag systems CaO and Al than row
2O
3Than less than 0.90, no longer on the eutectic line, there is the liquation problem in slag to slag ingredient in the refrigerative process, cause Al in the first refrigerative slag crust
2O
3Too high levels, the later stage slag ingredient changes, thereby influences process stabilizing, and ingot casting surface slag runner is serious.
Summary of the invention
The object of the present invention is to provide a kind of remelting slag and method of manufacture thereof that is used for the esr slab,, guarantee that slag system is stable in the reflow process, ingot casting smooth surface, chemical composition stability to the technology and the technical characterstic of esr slab.
In order to achieve the above object, the present invention adopts following technical scheme to realize:
A kind of remelting slag that is used for the esr slab is characterized in that it is made up of following compositions in weight percentage:
Lime 28%～30%
Aluminum oxide 30%～32%
Fluorite 39%～41%
Natural manganese dioxide 1%～3%
CaO in the said lime>=95%, granularity 0～150 order, the Al in the aluminum oxide
2O
3>=98%, granularity 0～100 order, the CaF in the fluorite
2>=97%, granularity 0～150 order, the MgO in the Natural manganese dioxide>=98%, granularity 0～150 order.
A kind of method of manufacture that is used for the remelting slag of esr slab is characterized in that, after above-mentioned raw materials is mixed, fritting under 1200 ℃～1550 ℃ high temperature, it is cooled to room temperature after, be broken into 3～20mm particle.
Above-mentioned a kind of remelting slag that is used for the esr slab is characterized in that the chemical ingredients after the fritting of said remelting slag is by weight percentage: CaF
239%～41%, CaO 28%～30%, Al
2O
332%～34%, SiO
2≤0.01%, P
2O
5≤0.01%, S≤0.01%, full carbon≤0.01%, wherein CaO/Al
2O
3=0.9～1.0.
Compared with prior art, the invention has the beneficial effects as follows: 1) this remelting slag system process chemical ingredients of being used for the remelting slab does not worsen, and slag system is relatively stable; 2) ingot casting smooth surface does not have tangible slag runner; 3) chemical ingredients burn out rate such as aluminium silicomanganese is less than 5%; 4) fluorite content is low in the component, reduces the pollution of fluorine to environment, meets the remelting slag system to hanging down the main flow that fluorine or floride-free direction develop.
Embodiment
Below in conjunction with embodiment the present invention is further specified:
Embodiment 1
A kind of remelting slag that is used for the esr slab, it is made up of following compositions in weight percentage:
Lime 28%, aluminum oxide 29%, fluorite 41%, Natural manganese dioxide 2%, after above-mentioned raw materials mixed, fritting under 1200 ℃～1550 ℃ high temperature, it is cooled to room temperature after, be broken into 3～20mm particle.
Embodiment 2
A kind of remelting slag that is used for the esr slab, it is made up of following compositions in weight percentage:
Lime 29%, aluminum oxide 30%, fluorite 40%, Natural manganese dioxide 1%, after above-mentioned raw materials mixed, fritting under 1200 ℃～1550 ℃ high temperature, it is cooled to room temperature after, be broken into 3～20mm particle.
Embodiment 3
A kind of remelting slag that is used for the esr slab, it is made up of following compositions in weight percentage:
Lime 30%, aluminum oxide 30%, fluorite 39%, Natural manganese dioxide 1%, after above-mentioned raw materials mixed, fritting under 1200 ℃～1550 ℃ high temperature, it is cooled to room temperature after, be broken into 3～20mm particle.
Embodiment 4
A kind of remelting slag that is used for the esr slab, it is made up of following compositions in weight percentage:
Lime 28.5%, aluminum oxide 31.5%, fluorite 39%, Natural manganese dioxide 1%, after above-mentioned raw materials mixed, fritting under 1200 ℃～1550 ℃ high temperature, it is cooled to room temperature after, be broken into 3～20mm particle.
In the foregoing description, the CaO in the raw material lime>=95%, granularity 0～150 order, the Al in the aluminum oxide
2O
3>=98%, granularity 0～100 order, the CaF in the fluorite
2>=97%, granularity 0～150 order, the MgO in the Natural manganese dioxide>=98%, granularity 0～150 order, wherein proportioning satisfies CaO/Al
2O
3=0.9～1.0.
Chemical ingredients after the fritting satisfies by weight percentage: CaF
239%～41%, CaO 28%～30%, Al
2O
332%～34%, SiO
2≤0.01%, P
2O
5≤0.01%, S≤0.01%, full carbon≤0.01%, wherein CaO/Al
2O
3=0.9～1.0.
The present invention is after using on 15 tons of slab electroslag furnaces, and with former technology consumable electrode method contrast, table 1 is seen in chemical composition change (being the weight percent of said chemical ingredients and molten steel in the table) and result of use contrast.
Table 1 chemical composition change and result of use contrast
After remelting finished, at slag cap sampling analysis, four groups of embodiment chemical composition analysis results were: CaO:28%～30%, Al to used slag system
2O
3: 32%～34%, CaF
2: 37%～40%, MgO:1%～3%, SiO
2: 1～3%.Data show that remelting slag system of the present invention is used for the esr process 1 of slab) slag system ingredient is relatively stable, do not worsen; 2) ingot casting smooth surface does not have tangible slag runner; 3) chemical ingredients burn out rate such as aluminium silicomanganese is less than 5%; 4) fluorite content is low in the component, reduces the pollution of fluorine to environment, meets the remelting slag system to hanging down the main flow that fluorine or floride-free direction develop.
Claims (3)
1. remelting slag that is used for the esr slab is characterized in that it is made up of following compositions in weight percentage:
Lime 28%～30%
Aluminum oxide 30%～32%
Fluorite 39%～41%
Natural manganese dioxide 1%～3%
CaO in the said lime>=95%, granularity 0～150 order, the Al in the aluminum oxide
2O
3>=98%, granularity 0～100 order, the CaF in the fluorite
2>=97%, granularity 0～150 order, the MgO in the Natural manganese dioxide>=98%, granularity 0～150 order.
2. a method of manufacture that is used for the remelting slag of esr slab is characterized in that, after above-mentioned raw materials is mixed, fritting under 1200 ℃～1550 ℃ high temperature, it is cooled to room temperature after, be broken into 3～20mm particle.
3. a kind of remelting slag that is used for the esr slab according to claim 1 and 2 is characterized in that the chemical ingredients after the fritting of said remelting slag is by weight percentage: CaF
239%～41%, CaO 28%～30%, Al
2O
332%～34%, SiO
2≤0.01%, P
2O
5≤0.01%, S≤0.01%, full carbon≤0.01%, wherein CaO/Al
2O
3=0.9～1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101915476A CN102304624A (en) | 2010-06-04 | 2010-06-04 | Remelting slag for electroslag remelting plate blank and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101915476A CN102304624A (en) | 2010-06-04 | 2010-06-04 | Remelting slag for electroslag remelting plate blank and manufacturing method thereof |
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|---|---|
| CN102304624A true CN102304624A (en) | 2012-01-04 |
Family
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994768A (en) * | 2012-08-13 | 2013-03-27 | 西峡县恒冠冶金材料有限公司 | Electro-slag re-melting slag and preparation method thereof |
| CN103468965A (en) * | 2013-09-25 | 2013-12-25 | 安徽工业大学 | Electro-slag remelting refining slag efficiently utilizing return slag and preparing method and application method thereof |
| CN104195348A (en) * | 2014-09-18 | 2014-12-10 | 刘天成 | Low-silicon and low-impurity pre-melting slag for electro-slag remelting and preparing method and application thereof |
| CN104561569A (en) * | 2015-01-14 | 2015-04-29 | 中原特钢股份有限公司 | Preparation and use process for electroslag remelting slag |
| CN107338362A (en) * | 2017-06-27 | 2017-11-10 | 中原特钢股份有限公司 | A kind of electroslag novel conductive slag and preparation method thereof |
| CN108342587A (en) * | 2018-04-10 | 2018-07-31 | 抚顺特殊钢股份有限公司 | A kind of stainless Blade Steel electroslag remelting slag |
| CN111139362A (en) * | 2019-12-14 | 2020-05-12 | 张家港广大特材股份有限公司 | Remelting method of high-purity 316LN stainless steel |
| WO2021033692A1 (en) * | 2019-08-19 | 2021-02-25 | デンカ株式会社 | Premelted flux |
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| CN1078500A (en) * | 1992-05-15 | 1993-11-17 | 上海重型机器厂 | A kind of electroslag technology that prevents to increase hydrogen |
| CN1028438C (en) * | 1990-08-20 | 1995-05-17 | 上海重型机器厂 | Electroslag remelting technique for controlling low aluminium |
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2010
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| CN1028438C (en) * | 1990-08-20 | 1995-05-17 | 上海重型机器厂 | Electroslag remelting technique for controlling low aluminium |
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Non-Patent Citations (2)
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994768A (en) * | 2012-08-13 | 2013-03-27 | 西峡县恒冠冶金材料有限公司 | Electro-slag re-melting slag and preparation method thereof |
| CN102994768B (en) * | 2012-08-13 | 2014-04-02 | 西峡县恒冠冶金材料有限公司 | Electro-slag re-melting slag and preparation method thereof |
| CN103468965A (en) * | 2013-09-25 | 2013-12-25 | 安徽工业大学 | Electro-slag remelting refining slag efficiently utilizing return slag and preparing method and application method thereof |
| CN103468965B (en) * | 2013-09-25 | 2015-04-15 | 安徽工业大学 | Preparation method for electro-slag remelting refining slag efficiently utilizing return slag |
| CN104195348A (en) * | 2014-09-18 | 2014-12-10 | 刘天成 | Low-silicon and low-impurity pre-melting slag for electro-slag remelting and preparing method and application thereof |
| CN104561569A (en) * | 2015-01-14 | 2015-04-29 | 中原特钢股份有限公司 | Preparation and use process for electroslag remelting slag |
| CN107338362A (en) * | 2017-06-27 | 2017-11-10 | 中原特钢股份有限公司 | A kind of electroslag novel conductive slag and preparation method thereof |
| CN108342587A (en) * | 2018-04-10 | 2018-07-31 | 抚顺特殊钢股份有限公司 | A kind of stainless Blade Steel electroslag remelting slag |
| WO2021033692A1 (en) * | 2019-08-19 | 2021-02-25 | デンカ株式会社 | Premelted flux |
| JP7385401B2 (en) | 2019-08-19 | 2023-11-22 | 山陽特殊製鋼株式会社 | Premelt flux for electroslag remelting process |
| CN111139362A (en) * | 2019-12-14 | 2020-05-12 | 张家港广大特材股份有限公司 | Remelting method of high-purity 316LN stainless steel |
| CN111139362B (en) * | 2019-12-14 | 2022-03-08 | 张家港广大特材股份有限公司 | Remelting method of high-purity 316LN stainless steel |
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Application publication date: 20120104 |