CN104630474A - Technology for production of iron-chromium-aluminum alloy by submerged arc furnace - Google Patents
Technology for production of iron-chromium-aluminum alloy by submerged arc furnace Download PDFInfo
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- CN104630474A CN104630474A CN201310544714.4A CN201310544714A CN104630474A CN 104630474 A CN104630474 A CN 104630474A CN 201310544714 A CN201310544714 A CN 201310544714A CN 104630474 A CN104630474 A CN 104630474A
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Abstract
The invention discloses a technology for production of an iron-chromium-aluminum alloy by a submerged arc furnace, and relates to the iron-chromium-aluminum alloy processing and manufacturing technical field; the technology comprises seven technological processes of material selection, proportioning, smelting, refining, furnace external filtration, deoxidizing quenching and tempering treatment, and ingot casting; in the technology method, the submerged arc furnace smelting can greatly improve the smelting efficiency, and the technology is simple; the abilities of oxygen blowing decarburization and high temperature nitrogen removal in the refining to remove carbon and nitrogen components in an alloy liquid are relatively good; the deslagging effect of the furnace external filtration is good, and the silicon-barium-strontium-calcium-iron alloy is strong in deoxidation, the alloy crystal nucleus formation can be effectively promoted, grain refinement is promoted, and corrosion resistance and mechanical processing properties of the alloy are improved.
Description
Technical field
The invention belongs to Aludirome processing and manufacturing technical field, be specifically related to a kind of mineral hot furnace and produce Aludirome technique.
Background technology
Aludirome is owing to having good thermostability, desirable heat conductivity, oxidation-resistance is strong, the advantages such as anti-vibration resistance is good, it is made to be widely used in all trades and professions, therefore efficient to the process for processing technology of Aludirome, the convenient requirement of quick and low cost is more and more higher, as application number 200410080451.7 discloses a kind of method that 3500KVA mineral hot furnace produces Alsimin, the method mainly comprises selects materials, batching, melting, the operations such as tapping casting, proportioning raw materials is bauxitic clay: silica: coal: iron filings=46:2.5:45:6.5, the method production cost obviously reduces and constant product quality, be suitable for industrial production, but the alloy impurity obtained by the method is more, contained carbon content can not stability contorting in less scope, make obtained alloy melting point low, fragility increases, machining property is not good, oxygen level is higher simultaneously, oxidized aluminum amount is increased, reduce erosion resistance.
Summary of the invention
It is simple that problem to be solved by this invention is to provide a kind of technological process, and technological factor is controlled, a kind of mineral hot furnace production Aludirome technique that machining property is good.
To achieve these goals, the technical scheme that the present invention takes for: a kind of mineral hot furnace provided produces Aludirome technique, comprises following processing step:
(1) select materials: select raw material to have bauxitic clay, chrome ore, coal and iron filings;
(2) prepare burden: raw material selected in step (1) is pressed bauxitic clay: chrome ore: coal: the weight percent mixing of iron filings=42:4.5:45:8.5;
(3) melting: add melting in mineral hot furnace by disposable for the raw material of joining in step (2),
(4) refining: the method for refining adopting oxygen decarburization and high temperature denitrogenation, aluminium alloy temperature controls at 1650 ~ 1700 DEG C, oxygen decarburization is started during refining 15 ~ 20min, oxygen blast is stopped when the content of carbon is down to 0.03 ~ 0.04% in aluminium alloy, carry out high-boiling denitrogenation, boiling time is greater than 30min, and during refining, ladle bottom gas stirring intensity is not less than 18L/(min.t);
(5) stove filters outward: imported in strumbox by foamed ceramic filter plate by aluminium alloy good for step (4) refining, strumbox temperature is set to 1500 ~ 1580 DEG C;
(6) deoxidation modifier treatment: pass into argon gas in strumbox, add silicon barium strontium Ca-Fe alloy and carry out deoxidation, electromagnetic agitation intensity is 0.24Nm
-3, deaeration time is 15 ~ 20min;
(7) water ingot: temperature controlled at 1600 ~ 1620 DEG C, carry out watering ingot.
Preferably, Al in the middle bauxitic clay of described step (1)
2o
3content is 62 ~ 68%, and in chrome ore, Cr content is greater than 80%, and in coal, C content is greater than 42%, and in iron filings, Fe content is greater than 96%.
Preferably, in described step (6), on magnetic stirrer, voltage is 450V, and frequency is 2 ~ 8Hz.
Preferably, in described step (6), the add-on of silicon barium strontium Ca-Fe alloy is 1.2kg/t, and deoxidation temperature controls at 1550 ~ 1650 DEG C.
Adopt technical scheme of the present invention, described mineral hot furnace melting greatly can improve the efficiency of smelting, technique is simple, oxygen decarburization in described refining and high temperature denitrogenation remove carbon in aluminium alloy and nitrogen component ability better, the outer filter and remove residue of described stove is effective, and the deoxidation of described silicon barium strontium Ca-Fe alloy is strong, and effectively can promote the formation of alloy nucleus, promote grain refining, improve alloy corrosion resistance and machining property.
Embodiment
embodiment 1:
1, select materials: select raw material to have bauxitic clay, chrome ore, coal and iron filings, wherein in bauxitic clay, Al2O3 content is 62%, and in chrome ore, Cr content is greater than 80%, and in coal, C content is greater than 42%, and in iron filings, Fe content is greater than 96%;
2, prepare burden: raw material selected in step (1) is pressed bauxitic clay: chrome ore: coal: the weight percent mixing of iron filings=42:4.5:45:8.5;
3, melting: add melting in mineral hot furnace by disposable for the raw material of joining in step (2),
4, refining: the method for refining adopting oxygen decarburization and high temperature denitrogenation, aluminium alloy temperature controls at 1650 DEG C, oxygen decarburization is started during refining 15min, oxygen blast is stopped when the content of carbon is down to 0.03% in aluminium alloy, carry out high-boiling denitrogenation, boiling time is greater than 30min, and during refining, ladle bottom gas stirring intensity is not less than 18L/(min.t);
5, stove filters outward: imported in strumbox by foamed ceramic filter plate by aluminium alloy good for step (4) refining, strumbox temperature is set to 1500 DEG C;
6, deoxidation modifier treatment: pass into argon gas in strumbox, add silicon barium strontium Ca-Fe alloy and carry out deoxidation, the add-on of silicon barium strontium Ca-Fe alloy is 1.2kg/t, deoxidation temperature controls at 1550 DEG C, electromagnetic agitation intensity is 0.24Nm-3, on magnetic stirrer, voltage is 450V, and frequency is 8Hz, and deaeration time is 15min;
7, water ingot: temperature controlled at 1600 DEG C, carry out watering ingot.
embodiment 2:all the other are identical with embodiment 1, difference is that in described step (1), in bauxitic clay, Al2O3 content is 65%, described step (4) interalloy liquid temp controls at 1675 DEG C, oxygen decarburization is started during refining 18min, oxygen blast is stopped when the content of carbon is down to 0.035% in aluminium alloy, in described step (5), strumbox temperature is set to 1540 DEG C, in described step (6), deoxidation temperature controls at 1600 DEG C, magnetic stirrer frequency is 5Hz deaeration time is 18min, and temperature controls at 1610 DEG C in (7) by described step.
embodiment 3:all the other are identical with embodiment 1, difference is, in described step (1), in bauxitic clay, Al2O3 content is 68%, described step (4) interalloy liquid temp controls at 1700 DEG C, oxygen decarburization is started during refining 20min, oxygen blast is stopped when the content of carbon is down to 0.04% in aluminium alloy, in described step (5), strumbox temperature is set to 1580 DEG C, in described step (6), deoxidation temperature controls at 1650 DEG C, magnetic stirrer frequency is 2Hz deaeration time is 20min, and temperature controls at 1620 DEG C in (7) by described step.
After above processing step, take out sample, to be measured:
From above data, mineral hot furnace melting greatly can improve the efficiency of smelting, technique is simple, oxygen decarburization in refining and high temperature denitrogenation remove carbon in aluminium alloy and nitrogen component ability better, the outer filter and remove residue of stove is effective, and the deoxidation of silicon barium strontium Ca-Fe alloy is strong, and effectively can promote the formation of alloy nucleus, promote grain refining, improve alloy corrosion resistance and machining property.
Obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (4)
1. mineral hot furnace produces an Aludirome technique, comprises following processing step:
(1) select materials: select raw material to have bauxitic clay, chrome ore, coal and iron filings;
(2) prepare burden: raw material selected in step (1) is pressed bauxitic clay: chrome ore: coal: the weight percent mixing of iron filings=42:4.5:45:8.5;
(3) melting: add melting in mineral hot furnace by disposable for the raw material of joining in step (2),
(4) refining: the method for refining adopting oxygen decarburization and high temperature denitrogenation, aluminium alloy temperature controls at 1650 ~ 1700 DEG C, oxygen decarburization is started during refining 15 ~ 20min, oxygen blast is stopped when the content of carbon is down to 0.03 ~ 0.04% in aluminium alloy, carry out high-boiling denitrogenation, boiling time is greater than 30min, and during refining, ladle bottom gas stirring intensity is not less than 18L/(min.t);
(5) stove filters outward: imported in strumbox by foamed ceramic filter plate by aluminium alloy good for step (4) refining, strumbox temperature is set to 1500 ~ 1580 DEG C;
(6) deoxidation modifier treatment: pass into argon gas in strumbox, add silicon barium strontium Ca-Fe alloy and carry out deoxidation, electromagnetic agitation intensity is 0.24Nm
-3, deaeration time is 15 ~ 20min;
(7) water ingot: temperature controlled at 1600 ~ 1620 DEG C, carry out watering ingot.
2. a kind of mineral hot furnace according to claim 1 produces Aludirome technique, it is characterized in that: Al in bauxitic clay in described step (1)
2o
3content is 62 ~ 68%, and in chrome ore, Cr content is greater than 80%, and in coal, C content is greater than 42%, and in iron filings, Fe content is greater than 96%.
3. a kind of mineral hot furnace according to claim 1 produces Aludirome technique, it is characterized in that: in described step (6), on magnetic stirrer, voltage is 450V, and frequency is 2 ~ 8Hz.
4. a kind of mineral hot furnace according to claim 1 produces Aludirome technique, it is characterized in that: in described step (6), the add-on of silicon barium strontium Ca-Fe alloy is 1.2kg/t, and deoxidation temperature controls at 1550 ~ 1650 DEG C.
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|---|---|---|---|
| CN201310544714.4A CN104630474A (en) | 2013-11-07 | 2013-11-07 | Technology for production of iron-chromium-aluminum alloy by submerged arc furnace |
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|---|---|---|---|
| CN201310544714.4A CN104630474A (en) | 2013-11-07 | 2013-11-07 | Technology for production of iron-chromium-aluminum alloy by submerged arc furnace |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614043A (en) * | 2004-10-10 | 2005-05-11 | 刘长福 | Production of Si-Al-Fe alloy in 35000KVA mine heating furnace |
| CN101538675A (en) * | 2008-03-19 | 2009-09-23 | 江苏星火特钢有限公司 | Method for producing tough iron-chromium-aluminium ferritic electrothermal alloy |
| CN101538640A (en) * | 2008-03-19 | 2009-09-23 | 江苏星火特钢有限公司 | Method for producing tough high chromium ferritic alloy |
| DE102008020523A1 (en) * | 2008-04-23 | 2009-10-29 | Gkss-Forschungszentrum Geesthacht Gmbh | Ductile magnesium alloy |
-
2013
- 2013-11-07 CN CN201310544714.4A patent/CN104630474A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614043A (en) * | 2004-10-10 | 2005-05-11 | 刘长福 | Production of Si-Al-Fe alloy in 35000KVA mine heating furnace |
| CN101538675A (en) * | 2008-03-19 | 2009-09-23 | 江苏星火特钢有限公司 | Method for producing tough iron-chromium-aluminium ferritic electrothermal alloy |
| CN101538640A (en) * | 2008-03-19 | 2009-09-23 | 江苏星火特钢有限公司 | Method for producing tough high chromium ferritic alloy |
| DE102008020523A1 (en) * | 2008-04-23 | 2009-10-29 | Gkss-Forschungszentrum Geesthacht Gmbh | Ductile magnesium alloy |
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Application publication date: 20150520 |