CN1164015A - DC arc furnace capable of smelting Si-Al-Fe alloy - Google Patents
DC arc furnace capable of smelting Si-Al-Fe alloy Download PDFInfo
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- CN1164015A CN1164015A CN 96104813 CN96104813A CN1164015A CN 1164015 A CN1164015 A CN 1164015A CN 96104813 CN96104813 CN 96104813 CN 96104813 A CN96104813 A CN 96104813A CN 1164015 A CN1164015 A CN 1164015A
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Abstract
A DC arc furnace for smelting Si-Al-Fe alloy features that its bottom electrode is made of ordinary steel and has a size equal to the area of furnace bottom and a polished surface, the electric current flows from two sides, there is a better heat-insulating material (Mg-C bricks) between carbon electrode and said bottom electrode, low-resistance tight contact among the carbon electrode, Mg-C brick layer and bottom electrode is ensured by special measures and water sealing is used under the bottom steel electrode in order to reach high temp (1900 deg.C) necessary for smelting.
Description
The invention belongs to the smelting equipment in the ferroalloy field.It is a kind of submerged arc formula electric arc furnaces that is specially adapted to smelt ferro-silico aluminium that silicon is high power consumption, silico-calcium, Si-Ba alloy.
The direct current electric arc furnace technology is able to extensive use in steel-making.But at ferroalloy Application for Field ability ground zero.The difference of various technology is embodied in the variation of bottom electrode structural, generally all adopts single electrode and conduction furnace bottom.As notification number is the direct current electric arc furnace that is proposed of CN20669061 μ, similar to the hot stove technology in existing single electrode direct current submerged arc formula ore deposit, but owing to only electric current is introduced the hearth electrode that the carbon piece is formed with two graphite rods, the resistance of graphite and carbon piece differs bigger, electric current mainly concentrates on the graphite block, causes the CURRENT DISTRIBUTION inequality of whole furnace bottom, and then causes the temperature inequality of furnace bottom, be unfavorable for carrying out smoothly of smelting process, be unfavorable for the raising of product quality and output.
It is all good to the purpose of this invention is to provide a kind of electric parameter (electrical efficiency height, CURRENT DISTRIBUTION is even) and performance indications, can be used for smelting the Novel DC electric arc furnaces that needs the high power consumption Alsimin of high temperature.
At above purpose, the present invention has adopted following technical scheme.1. body of heater adopts ordinary arc furnace (the hot stove in ore deposit) body of heater, and electrode changes an electrode into.2. hearth electrode is made by pure iron or ordinary steel, and its size and hearth area equate, and introduce electric current by both sides (small-power) or four sides (high-power).Electrode and the hearth electrode of introducing electric current are that a whole steel is made.For reducing endogenous heat (resistance heat), should adopt low-resistance bloom, its surface also should polish smooth.As low power direct current electric arc furnace, the graphite electrode slab of an available monoblock is made hearth electrode.3. there is one on the hearth electrode with the carbon pole layer pre-buried method global formation of steel ring and that form through roasting.It between carbon pole layer and the steel hearth electrode the advanced good heat-insulating material of electric conductivity--magnesia carbon brick.Adopt special measure to guarantee carbon pole layer and magnesia carbon brick layer, the low resistance close-coupled between magnesia carbon brick layer and the steel plate electrode layer.4. be water collar below the steel hearth electrode, when smelting when smelting needs about 1900 ℃ ferro-silico aluminiums that could reduce or sial barium, because the high temperature of melting kettle is through behind the brick fuel, temperature is still very high, may melt the steel electrode, should water flowing cool off, to guarantee that electrode can operate as normal.As replacing carbon brick with magnesia carbon brick, then water collar is only as the stand-by facility of cooling system contingency.
Compared with prior art, the present invention has following advantage: 1. the carbon element hearth electrode that forms with the steel ring method of forming has guaranteed the high temperature of about 3000 ℃ of furnace bottom abilities, and to be used to smelt 1900 ℃ need high temperature ferro-silico aluminiums that could reduce, market in urgent need and silicon-aluminium-barium alloy.2. with integrally formed graphite (carbon steel) hearth electrode, because electric load and electric current are evenly distributed at whole furnace bottom, thus make the furnace bottom firepower too unconcentrated, crucible is bigger, and temperature is also even, helps improving product quality and yield.3. for the hearth electrode carbon steel is not burnt out because of crucible conducts high temperature, can significantly reduce heat loss without carbon brick with favorable conductive heat-insulating material magnesia carbon brick, favourable energy-conservation.4. the cooling jacket below the carbon steel can make electrode and crucible all be in normal operating conditions.Simple in structure, cooling effect is better.
Now in conjunction with the accompanying drawings, the present invention is further illustrated
Among the figure, 1 band is reinforced the furnace shell of steel ring, and 2 is the refractory brick fragment, and 3 is the carbon element knotting layer of hearth electrode, 4 steel hearth electrodes, and 5 is electrode holder and Conducting copper tile (band water cooling tube).6. the water cooling tube of steel hearth electrode, 7. I-steel, the 8. base formed of insulated fireproof brick and concrete.9. insulation material layer.10. refractory brick, 11. carbon elements knotting layer.12. magnesia carbon brick.13. brasses.14. the electric current leading-in end of steel hearth electrode.15. top electrode.16. top electrode brasses.17. electric arc.
Electric current is introduced into steel hearth electrode 4 by water-cooled brasses 13 and the electric energy guiding structure 14 that electrode holder 5 forms.Through the good heat-insulating material magnesia carbon brick 12 of electric conductivity, enter carbon element bottom electrode layer 3 again,, and produce electric arc 17 between the top electrode (self-baking electrode) 15 at this.By arc heat the furnace charge around being deposited in is melted, and under 1900 ℃～2000 ℃ high temperature, carbon reduction generates Alsimin, regularly taps a blast furnace from tapping hole (end marks the figure).Tap a blast furnace finish after, push furnace charge, continue to begin to smelt.So circulation forms constantly and feeds in raw material, and constantly goes out the continuous smelting process of molten iron.Be to guarantee high temperature necessary in the stove and energy-conservation needs, the heat-insulation layer of forming by heat-insulating material 9 and GAP TYPE refractory material fragment 2 and refractory brick 10 around the body of heater, outermost layer is formed furnace shell by the steel plate of being with rinforcement bar.
According to result of the test, because the bottom electrode structural of These characteristics is arranged, this Novel DC electric arc furnace smelting Alsimin, output improves 10%, and energy consumption descends 8%, and furnace bottom does not substantially rise.
Claims (5)
1. the Novel DC electric arc furnaces of an energy smelting Si-Al-Fe alloy, its technical characterictic is: body of heater adopts ordinary arc furnace (the hot stove in ore deposit) body of heater, and top electrode changes an electrode into, is placed on the position that stove heart center is partial to tapping hole a little, is beneficial to tap a blast furnace smoothly.
2. the desired a kind of Novel DC electric arc furnaces that can smelting Si-Al-Fe alloy of power one, its technical characterictic is that hearth electrode is made by ordinary steel, its size and hearth area equate, and by both sides (small-power) or four sides (high-power) introducing electric current.Electrode and the hearth electrode of introducing electric current are that a whole steel is made.For reducing endogenous heat (resistance heat), should adopt low-resistance bloom, its surface also should polish smooth.As low power direct current electric arc furnace, the graphite electrode slab of an available monoblock is made hearth electrode.
3. the desired a kind of Novel DC electric arc furnaces that can smelting Si-Al-Fe alloy of power one, its technical characterictic are to have one on the hearth electrode with pre-buried method global formation of steel ring and the carbon pole layer that forms through roasting.
4. the desired a kind of Novel DC electric arc furnaces that can smelting Si-Al-Fe alloy of power one, its technical characterictic is, is advanced person's the good heat-insulating material of electric conductivity--magnesia carbon brick between carbon pole layer and the steel hearth electrode.Adopt special measure to guarantee carbon pole layer and magnesia carbon brick layer, the low resistance close-coupled between magnesia carbon brick layer and the steel plate electrode layer.
5. the desired a kind of Novel DC electric arc furnaces that can smelting Si-Al-Fe alloy of power one, its technical characterictic is, be water collar below the steel hearth electrode, when smelting when smelting needs about 1900 ℃ ferro-silico aluminiums that could reduce or sial barium, because the high temperature of melting kettle is through behind the brick fuel, temperature is still very high, may melt the steel electrode, should water flowing cool off, to guarantee that electrode can operate as normal.As replacing carbon brick with magnesia carbon brick, then water collar is only as the stand-by facility of cooling system contingency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96104813 CN1164015A (en) | 1996-04-30 | 1996-04-30 | DC arc furnace capable of smelting Si-Al-Fe alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96104813 CN1164015A (en) | 1996-04-30 | 1996-04-30 | DC arc furnace capable of smelting Si-Al-Fe alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1164015A true CN1164015A (en) | 1997-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96104813 Pending CN1164015A (en) | 1996-04-30 | 1996-04-30 | DC arc furnace capable of smelting Si-Al-Fe alloy |
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| CN (1) | CN1164015A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275927A (en) * | 2011-06-01 | 2011-12-14 | 邓小宝 | Environmentally-friendly energy-saving high-efficiency silicon smelting furnace capable of performing gas combustion heat accumulation utilizing electric arc dual heating and back combustion of exhaust containing residual heat |
| CN102937373A (en) * | 2012-10-23 | 2013-02-20 | 鞍钢股份有限公司 | Crucible used for direct-current arc induction furnace and manufacturing method of crucible |
| CN112195300A (en) * | 2020-08-18 | 2021-01-08 | 北京中冶设备研究设计总院有限公司 | Device and method for smelting ferro-silico-aluminum from ferro-nickel slag |
-
1996
- 1996-04-30 CN CN 96104813 patent/CN1164015A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275927A (en) * | 2011-06-01 | 2011-12-14 | 邓小宝 | Environmentally-friendly energy-saving high-efficiency silicon smelting furnace capable of performing gas combustion heat accumulation utilizing electric arc dual heating and back combustion of exhaust containing residual heat |
| CN102937373A (en) * | 2012-10-23 | 2013-02-20 | 鞍钢股份有限公司 | Crucible used for direct-current arc induction furnace and manufacturing method of crucible |
| CN112195300A (en) * | 2020-08-18 | 2021-01-08 | 北京中冶设备研究设计总院有限公司 | Device and method for smelting ferro-silico-aluminum from ferro-nickel slag |
| CN112195300B (en) * | 2020-08-18 | 2022-06-03 | 北京中冶设备研究设计总院有限公司 | Device and method for smelting ferro-silico-aluminum from ferro-nickel slag |
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