CN103925792B - One is drawn the post-rift processing method of channel in smelting furnace - Google Patents
One is drawn the post-rift processing method of channel in smelting furnace Download PDFInfo
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- CN103925792B CN103925792B CN201410152062.4A CN201410152062A CN103925792B CN 103925792 B CN103925792 B CN 103925792B CN 201410152062 A CN201410152062 A CN 201410152062A CN 103925792 B CN103925792 B CN 103925792B
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Abstract
The invention discloses in one and draw the post-rift processing method of channel in smelting furnace, comprise following treatment step: 1) first the copper liquid in whole stove is reduced to furnace bottom and plays about 200mm, and cover charcoal; 2) by the failure of current in the electric furnace of its Fracture channel, dismantle the iron core in this electric furnace and hot-wire coil, close the cooling water of its water jacket; 3) stifled full with high chrysotile in the water jacket of the electric furnace of fracture channel, then water jacket both ends of the surface are shut; 4) the inductor voltage of the electric furnace of the channel that do not rupture is risen to 300V, and heat up 4 hours, and then voltage is risen to 300V-380V, temperature controls at 1050-1200 DEG C; 5) temperature of the then disconnected ditch position copper liquid of repetitive measurement channel; 6) the electric current Power resumption cut off before, and carry out water jacket water flowing work, the iron core disassembled before finally installing and coil, carry out inductor insulation.The present invention can make the abnormal fracture of channel or be come back to life by the channel of fracture, extends the service life of smelting furnace, cost-saving, increases the benefit.
Description
Technical field
The present invention relates in one and draw the post-rift processing method of channel in smelting furnace.
Background technology
In current coloured industry, there is the application of core induction channel furnace to get more and more, be widely used in smelting furnace and the holding furnace of melting Copper and its alloy.Be characterized in the advantages such as heating is fast, efficiency is high, iron loss is few, environment friendly and pollution-free, site environment is good.
Using maximum is that continuous up-casting oxygen-free copper bar unit adopts 300kg to have core to respond to three disjunctor electric furnaces (i.e. melting furnace and holding furnace), the transformer that its operation principle works under being equivalent to short-circuit condition, hot-wire coil is equivalent to the primary winding of transformer, and its channel is equivalent to the secondary coil of transformer.When after primary winding energising, the metal in channel is heated owing to producing induced-current.When heat passes to burner hearth, make again the temperature of metal in its burner hearth constantly increase, cause metal molten.But the event of disconnected channel happens occasionally in process of production, once channel fracture can not the loss that will bring enterprise economically of full production.
Common channel fracture mainly contains following situation:
1. channel fracture in new stove temperature-rise period
1.1 channel defects
In the casting process of channel, have slag inclusion, pore, crackle, coarse grains, have drawing crack line etc., while intensification, under the effect of thermal expansion, channel produces certain stress to channel, if defectiveness, can be broken in weak spot at once.
1.2 brickworks are improper
Not tight at channel surrounding ramming mass, especially between the bottom surface and water jacket of channel, ramming mass is more solid, loosening phenomenon can not be had, otherwise in intensification, particularly when voltage 150V and 180V, channel is when rising molten, copper liquid can ooze copper in the quartz loosened, now the channel on top does not also melt completely, causes the loss of copper liquid, produces and lacks copper, channel top and the bottom can not be connected, cause channel to rupture.
2. channel fracture in normal productive process
2.1 cause tripping operation circut breaking due to apparatus failure, and operating personnel do not have Timeliness coverage, and when power-on-reset at once again after discovery, having spent a period of time occurs that no current channel ruptures.Mainly power-off time is long for this, and channel is dried up, and cover is very near, channel is cooled rapidly, and after sending high voltage suddenly, channel has little time transferring heat, and channel rubescent fusing at once in the short time, occur that channel ruptures, this is the channel crack conditions that misoperation causes.
2.2 cause channel to rupture due to exogenous impurity, and first is have foul in charcoal, melt as entered in stove together with mud, stone and other tiny particle foreign material etc.At high temperature can generate silicide to mix with copper liquid and flow in channel at once, the channel of secondary coil be conducted electricity abnormal, cause electric current unstable and finally cause channel to be isolated and rupture.Second is that copper inside own has a lot of impurity to bring fusing into, and channel also will be caused to rupture.As heavy metal in copper and micro-rare metal too high levels.Oxides a large amount of in the middle of copper scap enters in channel, makes it slowly sting and is bonded in channel wall, makes channel cross section diminish gradually, finally causes fracture.
3. the too high channel that causes of temperature ruptures
Because temperature is grasped not in place, cause the long-time temperature of copper liquid too high.The smelting temperature of general copper controls at 1050-1200 DEG C, when temperature is more than more than 1300 DEG C, ramming mass quartz sand also there will be molten state or becomes grume, can separate out to floating from channel inwall surrounding, be partially formed molten knurl, channel cross section is diminished, electric current reduces, cause Severe blockage, and rupture.
4. the channel fracture that equipment fault reasons such as (have a power failure, cut off the water, water jacket leaks, auto-transformer burnt by coil) contactor open circuits causes.The probability of channel fracture is comparatively large under such circumstances, because stove global copper liquid freezes, is difficult to fusing for the moment, in strict accordance with technological operation, must ruptures as caused channel because of carelessness like this.
After channel fracture, how to solve, recover be in whole industry, is also the practical problem faced by institute of each enterprise, is also the difficult problem that urgent need will solve.If the abnormal fracture of channel can be avoided or the channel of fracture " is come back to life ", not only can return to normal production, and can retrieve economic losses, raise the efficiency.The present invention combine for many years on draw stove use experience the reason that channel ruptures analyzed, in production practices, carried out bold practice and trial, a channel that rupture time is longer processed, makes its Power resumption, normally produce.
Summary of the invention
The object of the invention there are provided in one draws the post-rift processing method of channel in smelting furnace, and the present invention can make the abnormal fracture of channel or be come back to life by the channel of fracture, extends the service life of smelting furnace, cost-saving, increases the benefit.
In order to achieve the above object, technical scheme of the present invention is:
One is drawn the post-rift processing method of channel in smelting furnace, comprises following treatment step:
1) first play about 200mm there being the core copper liquid responded in the whole stove of three disjunctor electric furnaces to be reduced to furnace bottom, and cover charcoal;
2) by the failure of current in the electric furnace of its Fracture channel, dismantle the iron core in this electric furnace and hot-wire coil, close the cooling water of its water jacket;
3) stifled full with high chrysotile in the water jacket of the electric furnace of fracture channel, then water jacket both ends of the surface are shut;
4) the inductor voltage of the electric furnace of the channel that do not rupture is risen to 300V, and heat up 4 hours, and then voltage is risen to 300V-380V, and note observing temperature simultaneously, control at 1050-1200 DEG C, prevent channel from high temperature rupturing, as ammeter has shake, with rod iron channel bottom disclose back and forth several under, anti-stopping groove;
5) temperature of the then disconnected ditch position copper liquid of repetitive measurement channel, that is raises whole furnace the channel melting disconnected ditch, is melted to breaking part, reaches and be interconnected;
6) the electric current Power resumption cut off before, and water jacket water flowing work is carried out, the iron core disassembled before finally installing and coil, carry out inductor insulation, disconnected ditch current response is observed in energising, when ammeter has electric current to show, shows that the disconnected ditch part of channel communicates.
In described step 6), water jacket water flowing work refers to when changing water jacket by changing water jacket technological operation, when do not change water jacket water inlet time, water directly can not be put into water jacket because water jacket now temperature is very high, once water inlet produces water vapour at once, water jacket can be caused to be out of shape and to scrap; Be then the water inlet of continuous drop, the steam inside water jacket slowly outwards arranged, and then slowly adds big yield, after waiting return pipe there are flowing out, just can open big yield to water jacket water flowing.
The invention has the beneficial effects as follows: one of the present invention is drawn the post-rift processing method of channel in smelting furnace, the abnormal fracture of channel can be made or the channel of fracture " is come back to life ", extending the service life of smelting furnace, cost-saving, increase the benefit.
Detailed description of the invention
Embodiment 1
The one of the present embodiment is drawn the post-rift processing method of channel in smelting furnace, comprises following treatment step:
1) first play about 200mm there being the core copper liquid responded in the whole stove of three disjunctor electric furnaces to be reduced to furnace bottom, and cover charcoal;
2) by the failure of current in the electric furnace of its Fracture channel, dismantle the iron core in this electric furnace and hot-wire coil, close the cooling water of its water jacket;
3) stifled full with high chrysotile in the water jacket of the electric furnace of fracture channel, then water jacket both ends of the surface are shut;
4) the inductor voltage of the electric furnace of the channel that do not rupture is risen to 300V, and heat up 4 hours, and then voltage is risen to 300V-380V, and note observing temperature simultaneously, control at 1050-1200 DEG C, prevent channel from high temperature rupturing, as ammeter has shake, with rod iron channel bottom disclose back and forth several under, anti-stopping groove;
5) then repeatedly use the temperature of the disconnected ditch position copper liquid of thermocouple measurement channel, that is whole furnace is raised the channel melting disconnected ditch, be melted to breaking part, reach and be interconnected;
6) the electric current Power resumption cut off before, and water jacket water flowing work is carried out, the iron core disassembled before finally installing and coil, carry out inductor insulation, disconnected ditch current response is observed in energising, when ammeter has electric current to show, shows that the disconnected ditch part of channel communicates.In described step 6), water jacket water flowing work refers to when changing water jacket by changing water jacket technological operation, when do not change water jacket water inlet time, water directly can not be put into water jacket because water jacket now temperature is very high, once water inlet produces water vapour at once, water jacket can be caused to be out of shape and to scrap; Be then the water inlet of continuous drop, the steam inside water jacket slowly outwards arranged, and then slowly adds big yield, after waiting return pipe there are flowing out, just can open big yield to water jacket water flowing.The one of the present embodiment is drawn the post-rift processing method of channel in smelting furnace, the abnormal fracture of channel can be made or the channel of fracture " is come back to life ", extending the service life of smelting furnace, cost-saving, increase the benefit.
Claims (1)
1. draw the post-rift processing method of channel in smelting furnace on, it is characterized in that: comprise following treatment step:
1) first play about 200mm there being the core copper liquid responded in the whole stove of three disjunctor electric furnaces to be reduced to furnace bottom, and cover charcoal;
2) by the failure of current in the electric furnace of its Fracture channel, dismantle the iron core in this electric furnace and hot-wire coil, close the cooling water of its water jacket;
3) stifled full with high chrysotile in the water jacket of the electric furnace of fracture channel, then water jacket both ends of the surface are shut;
4) the inductor voltage of the electric furnace of the channel that do not rupture is risen to 300V, and heat up 4 hours, and then voltage is risen to 300V-380V, and note observing temperature simultaneously, control at 1050-1200 DEG C, prevent channel from high temperature rupturing, as ammeter has shake, with rod iron channel bottom disclose back and forth several under, anti-stopping groove;
5) temperature of the then disconnected ditch position copper liquid of repetitive measurement channel, that is raises whole furnace the channel melting disconnected ditch, is melted to breaking part, reaches and be interconnected;
6) the electric current Power resumption cut off before, and water jacket water flowing work is carried out, the iron core disassembled before finally installing and coil, carry out inductor insulation, disconnected ditch current response is observed in energising, when ammeter has electric current to show, shows that the disconnected ditch part of channel communicates;
Described step 6) in water jacket water flowing work refer to when water jacket will be changed by changing water jacket technological operation, when do not change water jacket water inlet time, water directly can not be put into water jacket because water jacket now temperature is very high, once water inlet produces water vapour at once, water jacket can be caused to be out of shape and to scrap; But drop water inlet continuously, the steam inside water jacket is slowly outwards arranged, and then slowly adds big yield, after waiting return pipe there are flowing out, just can open big yield to water jacket water flowing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410152062.4A CN103925792B (en) | 2014-04-16 | 2014-04-16 | One is drawn the post-rift processing method of channel in smelting furnace |
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| CN201410152062.4A CN103925792B (en) | 2014-04-16 | 2014-04-16 | One is drawn the post-rift processing method of channel in smelting furnace |
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| CN103925792B true CN103925792B (en) | 2015-08-19 |
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| CN112611221A (en) * | 2020-12-28 | 2021-04-06 | 无锡超洲科技有限公司 | Emergency first-aid method for breakage of melting channel of up-drawing copper melting furnace |
| CN115493402A (en) * | 2022-08-29 | 2022-12-20 | 金川集团股份有限公司 | Method for solidification and secondary melting of melting channel of power frequency induction furnace |
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| CN101718491B (en) * | 2009-12-14 | 2011-06-29 | 洛阳双瑞达特铜有限公司 | Process method for reopening old furnace of cored line-frequency induction electric furnace for producing copper-nickel alloy |
| CN102798289A (en) * | 2012-06-25 | 2012-11-28 | 新兴铸管（浙江）铜业有限公司 | Emergency method for channel breakage of power frequency cored induction electric furnace for pure copper smelting |
| CN102901352B (en) * | 2012-11-01 | 2014-10-01 | 洛阳双瑞达特铜有限公司 | Method for repairing melting groove copper mold for inductor of core frequency induction furnace |
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