CN104697344A - Submerged arc furnace electrode and submerged arc furnace - Google Patents
Submerged arc furnace electrode and submerged arc furnace Download PDFInfo
- Publication number
- CN104697344A CN104697344A CN201510035303.1A CN201510035303A CN104697344A CN 104697344 A CN104697344 A CN 104697344A CN 201510035303 A CN201510035303 A CN 201510035303A CN 104697344 A CN104697344 A CN 104697344A
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- Prior art keywords
- electrode
- arc
- submerged arc
- arc furnace
- temperature
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- 230000004888 barrier function Effects 0.000 claims description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 239000011707 mineral Substances 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000010301 surface-oxidation reaction Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 3
- 238000010891 electric arc Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000004927 fusion Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
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- Furnace Details (AREA)
Abstract
The invention provides a submerged arc furnace electrode. The submerged arc furnace electrode comprises an electrode body, wherein an insulation layer is arranged on the outer surface of the electrode surface. The insulation layer is added on the outer surface of the electrode body, directions of the current, the voltage and the arc of the electrode are controlled, meanwhile, effects of wear resistance, impact resistance and surface oxidation resistance are realized, the insulation layer is decomposed at the high temperature of a working end of the electrode, the arc produced by the branch current of the electrode due to the high content of fixed carbon of a carbonaceous reducing agent in a raw material zone and a clinker zone is eliminated, the density of the current, the voltage and the arc of the electrode at the working end (reduction zone) is guaranteed, the stability of the arc is guaranteed, and the higher furnace temperature is kept. Besides, breakage of the electrode caused by temperature changes and effects caused by thinning of the electrode due to high-temperature oxidation of the surface on the conductive sectional area are eliminated.
Description
Technical field
The invention belongs to technical field of metallurgical equipment, be specifically related to a kind of electrodes in mine hot stove and mineral hot furnace.
Background technology
Mineral hot furnace, when production, by three-phase alternating current or single-phase DC electricity input electrode, enters freeze profile by electrodes conduct and becomes electric arc generation high temperature to impel the oxide in carbon and ore to fuse.Reduction process produces bed structure raw material district, grog district, reducing zone and liquid metal district.
As shown in Figure 2, formed because the raw material district of bed structure, grog district and reducing zone are all carbonaceous reducing agent and ore, in production process, in order to the oxide fusion met in carbon and ore is good, carbonaceous reducing agent fixed carbon content is higher, and the reducing agent that the ore reducing same quantity consumes is fewer, and the impurity brought in stove by reducing agent is also fewer, improve production capacity and the product quality of electric furnace, reduce power consumption simultaneously.The carbonaceous reducing agent fixed carbon content used when producing is higher, ratio resistance is less, this feature impels a lot of branch current of generation and electric arc in raw material district and grog district, disperseed the electric current in welding tip (reducing zone) and voltage, weaken reduce working end (reducing zone) electric current, voltage, electric arc density cause that working end (reducing zone) arc light is short, temperature is low.Therefore, in order to reduce the excessively strong phenomenon of branch current in production process, adopting and improving the resistivity of reducing agent, but simultaneously the fixed carbon content of reducing agent can reduce, the too high levels of ash content.The impurity that ash content is brought in stove is many, can affect gas permeability, makes slag become glutinous, causes difficulty of coming out of the stove, the working of a furnace is worsened; The fixed carbon content of reducing agent reduces, and cannot meet the oxide fusion in carbon and ore, and cause ore cannot reduce along with flue gas and slag are discharged, electric energy and raw materials consumption increase, and have a strong impact on quality and the output of product.
Summary of the invention
The object of the invention is to propose a kind of electrodes in mine hot stove, be applied in mineral hot furnace and can overcome above-mentioned defect.
Technical scheme of the present invention is achieved in that a kind of electrodes in mine hot stove, comprises electrode body, and the outer surface of electrode body is provided with insulating barrier.
Insulating barrier is increased at the outer surface of electrode body, the direction of the electric current on control electrode, voltage and electric arc, there is wear-resistant, shock resistance, resistance to surface oxidation simultaneously, the high temperature that simultaneously insulating barrier follows welding tip decomposes together, eliminate electrode and produce electric arc in raw material district and the grog district internal cause carbonaceous reducing agent fixed carbon content branch current that occurs of height, ensure that the density of the electric current of electrode in working end (reducing zone), voltage and electric arc, ensure that the stability of electric arc, maintain higher furnace temperature.Eliminate fracture that electrode produces because of variations in temperature simultaneously and make because surface high-temp oxidation electrode attenuate affected conductive cross-sectional area.
The invention has the beneficial effects as follows: increase insulating barrier in electrode appearance and eliminate branch current and the electric arc that produces, improve the voltage on electrode, reducing resistance impels electrode not easily rubescent, effectively improve furnace power factor, working end electric current and voltage density are guaranteed, meet the length of electric arc, expand reducing zone.Because improve the voltage on electrode, can electrode diameter be reduced, reduce construction cost, serve energy-saving and cost-reducing.Adopt the carbonaceous reducing agent that fixed carbon content is very high in process of production, the reducing agent consumed at the same quantity ore of reduction is fewer, and the impurity brought in stove by it is also fewer, therefore can produce highly purified metallurgic product, improve production capacity and the product quality of electric furnace, reduce power consumption.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is mineral hot furnace operation principle schematic diagram;
In figure: 1-electrode body, 2-insulating barrier, 3-raw material district, 4-grog district, 5-reducing zone, 6-liquid metal district.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Electrodes in mine hot stove as shown in Figure 1, comprises electrode body 1, and the outer surface of electrode body 1 is provided with insulating barrier 2.
Can by high temperature insulating material be made into sleeve pipe, the outside being then sleeved on electrode body 1 forms insulating barrier 2; Also can at the outer surface application insulating barrier 2 of electrode body 1; The hybrid mode formation insulating barrier 2 of sleeve pipe can also be added by application.
The material that insulating barrier 2 adopts has the high temperature insulating materials such as high-temperature structural ceramics, ceramic superhigh temperature inorganic coating, ceramic fibre, aluminium oxide, silicon nitride, boron nitride.The product reduction temperature of the product can produced according to mineral hot furnace, selected electrode and production selects the material of insulating barrier 2.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. an electrodes in mine hot stove, comprises electrode body (1), it is characterized in that: the outer surface of described electrode body (1) is provided with insulating barrier (2).
2. electrodes in mine hot stove as claimed in claim 1, is characterized in that: described insulating barrier (2) is made up of high temperature insulating material.
3. a mineral hot furnace, is characterized in that: this mineral hot furnace comprises the electrodes in mine hot stove described in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510035303.1A CN104697344A (en) | 2015-01-23 | 2015-01-23 | Submerged arc furnace electrode and submerged arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510035303.1A CN104697344A (en) | 2015-01-23 | 2015-01-23 | Submerged arc furnace electrode and submerged arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104697344A true CN104697344A (en) | 2015-06-10 |
Family
ID=53344721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510035303.1A Pending CN104697344A (en) | 2015-01-23 | 2015-01-23 | Submerged arc furnace electrode and submerged arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104697344A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075798A (en) * | 1992-11-18 | 1993-09-01 | 冶金工业部钢铁研究总院 | The power-saving method of the hot stove melting in ore deposit |
| CN1176319A (en) * | 1996-09-09 | 1998-03-18 | 解青华 | Equipment for smelting and directly casting ingot from ultra-pure quartz material and process for preparing solar-grade silicon wafer by slicing |
| CN1251618A (en) * | 1996-12-27 | 2000-04-26 | 阿拉巴马动力公司 | Electric furnace with insulated electrode and process for producing molten metals |
| CN204574827U (en) * | 2015-01-23 | 2015-08-19 | 嵩明县汇成冶金设备制造厂 | A kind of electrodes in mine hot stove and mineral hot furnace |
-
2015
- 2015-01-23 CN CN201510035303.1A patent/CN104697344A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075798A (en) * | 1992-11-18 | 1993-09-01 | 冶金工业部钢铁研究总院 | The power-saving method of the hot stove melting in ore deposit |
| CN1176319A (en) * | 1996-09-09 | 1998-03-18 | 解青华 | Equipment for smelting and directly casting ingot from ultra-pure quartz material and process for preparing solar-grade silicon wafer by slicing |
| CN1251618A (en) * | 1996-12-27 | 2000-04-26 | 阿拉巴马动力公司 | Electric furnace with insulated electrode and process for producing molten metals |
| CN204574827U (en) * | 2015-01-23 | 2015-08-19 | 嵩明县汇成冶金设备制造厂 | A kind of electrodes in mine hot stove and mineral hot furnace |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |