CN106895702B - method for coping with disconnection fault of molten channel and production process of oxygen-free copper rod - Google Patents
method for coping with disconnection fault of molten channel and production process of oxygen-free copper rod Download PDFInfo
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- CN106895702B CN106895702B CN201710128053.5A CN201710128053A CN106895702B CN 106895702 B CN106895702 B CN 106895702B CN 201710128053 A CN201710128053 A CN 201710128053A CN 106895702 B CN106895702 B CN 106895702B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
- F27B14/061—Induction furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/14—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/20—Arrangement of controlling, monitoring, alarm or like devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2001/00—Composition, conformation or state of the charge
- F27M2001/01—Charges containing mainly non-ferrous metals
- F27M2001/015—Copper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/13—Smelting
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- Engineering & Computer Science (AREA)
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Abstract
The invention provides methods for dealing with a molten channel disconnection fault and a production process of an oxygen-free copper rod, wherein the production process comprises the following steps of shutting down a molten channel type induction furnace, covering charcoal with a preset thickness on the liquid level of copper liquid when the liquid level of the copper liquid in a hearth is reduced to 6-3 cm away from the bottom surface of the furnace through the operation of a lead rod, enabling the charcoal to keep burning, adjusting the voltage of an electrified coil to 250V or 270V, and turning off a power supply after keeping for 5-10 minutes.
Description
Technical Field
The invention relates to the technical field of up-drawing continuous casting units, in particular to methods for dealing with disconnection faults of a molten channel and a production process of an oxygen-free copper rod.
Background
The up-drawing continuous casting machine set is a device for producing oxygen-free copper rods, the power frequency induction furnace is a key melting device in the up-drawing continuous casting machine set, and the power frequency induction furnace mainly comprises a furnace body, a furnace frame and an inductor, wherein the inductor comprises a coil, a water jacket, an iron core and a melting channel (the melting channel is shown in figure 1).
The working principle of the industrial frequency induction furnace is equivalent to a transformer working in a short circuit state, a high-voltage side (primary) of the inductor consists of a coil with water cooling, a low-voltage side (secondary) of the inductor consists of a short-circuit melting channel, during working, the electrified coil is equivalent to coils, the melting channel is equivalent to a secondary coil, after the coils are electrified, metal in the melting channel is heated due to the generation of induced current, and when heat is transferred to the upper plane of the melting channel, the temperature of the metal in a hearth continuously rises, so that the metal is melted.
The channel disconnection occurs during shutdown or secondary blow-in, because the upper half of the channel is in a solidified state and the lower half is in a melted state, and the lower half contracts when the copper liquid is solidified, which may cause the upper and lower parts to separate, i.e. the channel disconnection.
Disclosure of Invention
In view of the above, the invention provides methods for dealing with the disconnection fault of the molten channel and a production process of the oxygen-free copper rod.
In order to achieve the purpose, the invention provides the following technical scheme:
A method for dealing with a channel disconnection fault, which comprises the following furnace shutdown process for a channel type induction furnace:
when the liquid level of the copper liquid in the hearth is reduced to 6-3 cm away from the bottom surface of the furnace by the guide rod operation, covering charcoal with a preset thickness on the liquid level of the copper liquid to keep the charcoal burning;
and adjusting the voltage of the electrified coil to 250V or 270V, and turning off the power supply after keeping for 5-10 minutes.
Preferably, in the above method, the predetermined thickness is 10cm to 20 cm.
Preferably, in the above method, before covering the charcoal in the blowing out process, the following steps are further included:
when the liquid level of the copper liquid in the hearth is reduced to 6-3 cm away from the bottom surface of the furnace by the operation of the guide rod, the voltage of the electrified coil is adjusted to 210V or 180V;
after the copper liquid in other areas except the corresponding area of plane on the melting groove solidifies, use to predetermine the piece and dip in the copper liquid in the corresponding area of plane on the melting groove, make by dip in the copper liquid level in area fall to with stove bottom surface parallel and level.
Preferably, in the above method, the preset member is a copper rod or a copper wire.
Preferably, in the above method, the blow-in process for the channel type induction furnace comprises the steps of:
and (3) repeatedly melting and dipping the solid copper in the melting groove until the solid copper is dipped to the disconnected part of the melting groove, and filling a copper conductor into the disconnected part to form electrical connection at two ends of the disconnected part.
Preferably, in the above method, in the open hearth process, the solid copper in the channel is melted using a flame spray gun.
Preferably, in the above method, the length of the nozzle of the flame spray gun is 20cm to 30cm in the blow-on process.
Preferably, in the above method, in the blow-in process, the filled copper conductor is a crushed copper block, and the crushed copper block is tamped after filling.
Preferably, in the above method, before times of the melting-dipping in the furnace opening process, the method further comprises the step of turning off the water supply of the water jacket of the energized coil or reducing the water flux in the water jacket.
A process for producing oxygen-free copper bars comprising a method of responding to a break fault in a channel, said method being as disclosed in any of the aforementioned items .
According to the technical scheme, the method for dealing with the disconnection fault of the molten channel reduces the liquid level of the copper liquid in the hearth to a very low position during shutdown, so that the amount of solid copper formed in the hearth is small, heat in the molten channel is less dissipated during the shutdown cooling process, and the cooling speed of the upper part of the molten channel is not too high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a channel in a channel inductor;
fig. 2 is a flowchart of methods for handling a channel open fault according to a second embodiment of the present invention.
Detailed Description
For ease of understanding, the present invention is further described in conjunction with the following figures.
Referring to fig. 1, which is a schematic view of a molten channel in a molten channel type inductor, in the prior art, when a molten channel is broken, workers sometimes hammer a steel rod deep into the molten channel for troubleshooting, so that a copper solid solidified at the upper end of the molten channel is expected to be hammered to be connected to with a molten channel at the lower part, and power is supplied after short circuit, so that the melting capacity can be recovered.
In addition, the above method may be applied to the disconnection at the illustrated position 1, but when the disconnection is at the illustrated position 2, the above method is difficult to implement because of a turn between the position 2 and the upper plane of the molten bath.
In order to cope with the channel disconnection fault, the channel disconnection fault can be prevented from happening in advance, and therefore methods for coping with the channel disconnection fault provided by the embodiment of the invention comprise the following furnace shutdown processes for the channel type induction furnace:
when the liquid level of the copper liquid in the hearth is reduced to 6-3 cm away from the bottom surface of the furnace by the guide rod operation, covering charcoal with a preset thickness on the liquid level of the copper liquid to keep the charcoal burning;
and adjusting the voltage of the electrified coil to 250V or 270V, and turning off the power supply after keeping for 5-10 minutes.
In a specific practical application, the preset thickness of the charcoal can be 10 cm-20 cm.
In the method provided by the embodiment of the invention, since the liquid level of the molten copper in the hearth is lowered to a very low position during the blow-out, the amount of solid copper formed in the hearth is small, so that the heat loss in the molten channel is small during the blow-out cooling process, and the cooling speed of the upper part of the molten channel is not too high.
Referring to fig. 2, a flow chart of methods for handling a break fault of a channel according to a second embodiment of the present invention is provided.
On the basis of the embodiment , the invention provides the second embodiment which is different from the embodiment only in that the furnace stopping process further comprises the following steps before covering charcoal:
when the liquid level of the copper liquid in the hearth is reduced to 6-3 cm away from the bottom surface of the furnace by the operation of the guide rod, the voltage of the electrified coil is adjusted to 210V or 180V;
after the copper liquid in other areas except the corresponding area of plane on the melting groove solidifies, use to predetermine the piece and dip in the copper liquid in the corresponding area of plane on the melting groove, make the copper liquid level that is dipped in the area fall to with stove bottom surface parallel and level.
Based on the embodiment , the embodiment further reduces the level of the copper liquid in the corresponding area of the upper plane of the melting channel, so that the volume of solid copper formed on the upper part of the melting channel is small, and the solid copper on the upper part of the melting channel is easy to process because the solid copper is less after the melting channel is cut off.
In specific practical application, the preset part can be a copper rod or a copper wire. Of course, in addition to the copper-made preset piece, preset pieces made of other materials can be used as long as the copper liquid can be dipped.
In order to better cope with the channel disconnection fault, not only the channel disconnection formed during the furnace shutdown is prevented as much as possible, but also the fault can be rapidly cleared during the furnace opening, that is, emergency treatment modes after the channel disconnection is developed are provided, so that on the basis of embodiment or embodiment two, in the method for coping with the channel disconnection fault provided by embodiment three of the invention, the furnace opening process adopted by the channel type induction furnace comprises the following steps:
and (3) repeatedly melting and dipping the solid copper in the melting groove until the solid copper is dipped to the disconnected part of the melting groove, and filling a copper conductor into the disconnected part to form electrical connection at two ends of the disconnected part.
The melting-dipping method includes that firstly, a small part of solid copper on the upper surface is melted , then molten copper is dipped to expose unmelted solid copper, the solid copper between the upper plane of a melting groove and a disconnected part can be quickly punched through by repeating melting-dipping, finally, a copper conductor is fed into the disconnected part from a channel formed by punching, short circuit connection is successfully formed, and disconnection faults of the melting groove are eliminated.
In particular, in practice, the solid copper in the channel may be melted using a flame spray gun having a nozzle length of 20cm to 30 cm.
The filled copper conductor can be whole copper blocks, such as copper bars, or a large number of broken copper blocks, the broken copper blocks are preferred in specific practical application, and the broken copper blocks are tamped after being filled, so that good electric connection is ensured, and disconnection of a melting channel is eliminated.
In order to reduce heat loss as much as possible and enable solid copper in the melting channel to be melted quickly, on the basis of the third embodiment, the fourth embodiment provided by the invention is different from the third embodiment only in that the fourth embodiment further comprises the following steps of turning off the water source of the water jacket with the electric coil or regulating the water flow in the water jacket before times of melting-dipping in the furnace opening process.
The invention also provides production processes of the oxygen-free copper rod, which comprise the method for dealing with the disconnection fault of the melting channel disclosed by the embodiment.
Various modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (5)
1, A method for dealing with a disconnection fault of a molten channel, which is characterized by comprising the following steps of:
when the liquid level of the copper liquid in the hearth is lowered to be 6-3 cm away from the bottom surface of the furnace through the operation of the guide rod, adjusting the voltage of the electrified coil to 180V, dipping the copper liquid in the corresponding area of the upper plane of the melting groove by using a preset piece after the copper liquid in other areas except the corresponding area of the upper plane of the melting groove is solidified, so that the liquid level of the copper liquid in the dipped area is lowered to be flush with the bottom surface of the furnace, then covering charcoal with the thickness of 20cm on the liquid level of the copper liquid, keeping the charcoal burning, finally adjusting the voltage of the electrified coil to be 250V or 270V, and turning off the power supply after keeping for 5-10 minutes;
the blow-in process adopted by the melting channel type induction furnace comprises the following steps:
the solid-state copper in the melting ditch is repeatedly melted-dip and is got until dipping in the disconnection department of melting ditch fill in the disconnection department the copper conductor makes the both ends of disconnection department form the electricity and connect, melt-dip and get the in-process and use the flame spray gun to melt the solid-state copper in the melting ditch, the disconnection department fills in the copper conductor is the broken copper piece, and will after filling the broken copper piece tamps.
2. The method of claim 1, wherein the predetermined piece is a copper rod or wire.
3. The method of claim 1, wherein the length of the nozzle of the flame spray gun is 20cm to 30cm in the blow-on process.
4. The method of claim 1, wherein said tapping process further comprises the step of turning off the water supply to the water jacket of said energized coil or reducing the water flux in said water jacket prior to times of said melt-dipping.
5, A production process of oxygen-free copper rod, characterized by comprising a method for dealing with the open failure of the melting channel, wherein the method is the method as claimed in any of claims 1-4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128053.5A CN106895702B (en) | 2017-03-06 | 2017-03-06 | method for coping with disconnection fault of molten channel and production process of oxygen-free copper rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128053.5A CN106895702B (en) | 2017-03-06 | 2017-03-06 | method for coping with disconnection fault of molten channel and production process of oxygen-free copper rod |
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| Publication Number | Publication Date |
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| CN106895702A CN106895702A (en) | 2017-06-27 |
| CN106895702B true CN106895702B (en) | 2020-01-31 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2125768A1 (en) * | 1971-05-25 | 1972-12-07 | Junker O | Grey cast iron melting channel loop induction furnace with - water-cooled coil |
| CN2935054Y (en) * | 2006-07-07 | 2007-08-15 | 陈行满 | Multi-layer covered core induction main frequency furnace |
| CN101718491A (en) * | 2009-12-14 | 2010-06-02 | 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 |
| CN203980885U (en) * | 2014-06-09 | 2014-12-03 | 浙江天宁合金材料有限公司 | Power frequency smelting furnace |
-
2017
- 2017-03-06 CN CN201710128053.5A patent/CN106895702B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2125768A1 (en) * | 1971-05-25 | 1972-12-07 | Junker O | Grey cast iron melting channel loop induction furnace with - water-cooled coil |
| CN2935054Y (en) * | 2006-07-07 | 2007-08-15 | 陈行满 | Multi-layer covered core induction main frequency furnace |
| CN101718491A (en) * | 2009-12-14 | 2010-06-02 | 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 |
| CN203980885U (en) * | 2014-06-09 | 2014-12-03 | 浙江天宁合金材料有限公司 | Power frequency smelting furnace |
Non-Patent Citations (3)
| Title |
|---|
| 工频有芯感应电炉安全使用技术实践;王全仁，等;《有色金属加工》;20141231;第43卷(第6期);35-40 * |
| 无氧铜杆上引连铸工频有芯电炉旧炉重启工艺实践;杨爱丽，许晶;《黑龙江冶金》;20020630(第3期);15-16 * |
| 浅谈水平连铸感应电炉熔沟断裂;周俊芳，王云龙;《有色金属加工》;20100430;第39卷(第2期);22-24,42 * |
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| CN106895702A (en) | 2017-06-27 |
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Address after: 252000 Xiangguang Road, Shifo Town, Yanggu County, Liaocheng City, Shandong Province Patentee after: Shandong Xiangrui Metal Technology Co.,Ltd. Address before: 252327 No.1 Xiangguang Road, Shifo Town, Yanggu County, Liaocheng City, Shandong Province Patentee before: XIANGRUI Co.,Ltd. |