CN102796881B - Method of accurately controlling consumable electrode remainder in electroslag remelting - Google Patents
Method of accurately controlling consumable electrode remainder in electroslag remelting Download PDFInfo
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- CN102796881B CN102796881B CN 201210249945 CN201210249945A CN102796881B CN 102796881 B CN102796881 B CN 102796881B CN 201210249945 CN201210249945 CN 201210249945 CN 201210249945 A CN201210249945 A CN 201210249945A CN 102796881 B CN102796881 B CN 102796881B
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Abstract
The invention discloses a method of accurately controlling consumable electrode remainder in electroslag remelting, and the method comprises the following steps: (1) designing the consumable electrode remainder length as L remainder; (2) designing the false electrode lengths of the groups of consumable electrodes: the false electrode length L1 of the first group of consumable electrodes is equal to H arm- L remainder-delta H ingot-H slag, the false electrode length Ln of the nth group of the consumable electrodes is equal to L1-(n-1)*delta H ingot, in the formula, L remainder refers to the designed remainder length of the consumable electrode, H arm refers to the vertical distance from the bottom end of the cross arm to the soleplate when the cross arm reaches the lower limit, delta H ingot refers to the added height of the electroslag ingot when each group of consumable electrodes is smelted until the cross arm reaches the lower limit, and H slag refers to the thickness of the slag; and (3) remelting the electroslag. The method disclosed by the invention has such beneficial effects as accurately controlling the consumable electrode remainder length, improving the utilization rate of the consumable electrode, avoiding the quality accident of changing the electroslag ingot component caused by adding the false electrode in the furnace by mistake, reducing the smelting electric consumption and reducing the production cost of the electroslag ingot and the like.
Description
Technical field
The present invention relates to electroslag remelting process, especially relate to the method for accurately controlling the consumable electrode remainder in a kind of esr.
Background technology
Consumable electrode cost in the esr accounts for 85 % of ESR ingot total cost, even up to more than 95%.At present, esr process is produced heavy forging and is adopted the multi-electrode operation usually with the high-quality large-scale steel ingot, and large-scale electroslag ingot will be with tens of and even up to a hundred electrodes by melting big mode and obtain with little.The residue length of consumable electrode (being remainder) is wayward, and fire door belongs to the high flue gas environment of high temperature, work under bad environment, all be that the operative employee wears the protective glasses close-ups during actually operating, observe also very inconveniently that so the control of counter electrode remainder is generally more extensive even very random for a long time, so that the consumable electrode remainder reaches 300mm, even longer also be quotidian thing, the waste that this has just caused consumable electrode has increased the production cost of ESR ingot.In addition, dummy electrode is long, causes dummy electrode to dissolve electroslag furnace easily and causes the ESR ingot composition to change the quality accident that causes ESR ingot to scrap; Dummy electrode is too short, and the consumable electrode remainder is long, causes the waste of consumable electrode.
Chinese patent application publication No.: CN102297669A, Shen Qing Publication day: 2011.12.28, a kind of flexible measurement method of electroslag furnace consumable electrode residue length is disclosed, according to electrode complexity stressed concern the soft measure equation of electrode length, obtain the soft measure equation of electrode residue length according to each position variation relation and melting crystal model in the fusion process.This method is to merge to determine the consumable electrode residue length according to weight predictive model and position prediction model, namely just adopts the method counter electrode residue length of soft measurement to predict, still has bigger error in actual production process.In addition, this method needs more test set, has not only directly increased cost, and adaptability and controllability are also relatively poor, are not easy to actually operating and grasp.
Summary of the invention
The present invention is big in order to solve the methodic error that has control consumable electrode remainder now, the cost height, adaptability and poor controllability are not easy to the problem of actually operating and grasp, the method of accurately controlling the consumable electrode remainder in a kind of esr is provided, this method is control electrode remainder length accurately, less investment, and technology is flexible, adaptability, controllability are strong, simple to operate, can improve the consumable electrode utilization ratio, reduce the production cost of ESR ingot.
To achieve these goals, the present invention is by the following technical solutions:
Accurately control the method for consumable electrode remainder in a kind of esr, described method may further comprise the steps:
(1) design consumable electrode remainder length L
SurplusConsumable electrode remainder length L
SurplusBe consumable electrode and want remaining length, the consumable electrode remainder length L in every group of consumable electrode
SurplusAll equate, design consumable electrode remainder length in advance in order to determine the length of dummy electrode.
(2) the dummy electrode length of consumable electrode is respectively organized in design: the dummy electrode length of the 1st group of consumable electrode is L
1=H
Arm-L
Surplus-△ H
Ingot-H
Slag, the dummy electrode length of the 2nd group of consumable electrode is L
2=L
1-△ H
Ingot, the rest may be inferred, and the dummy electrode length of n group consumable electrode is L
n=L
1-(n-1) * △ H
Ingot, in the formula: H
ArmIts bottom is to the vertical range of base plate, △ H when arriving lower limit for transverse arm
IngotBe every group of comsumable melt height that ESR ingot increases when transverse arm arrives lower limit, H
SlagFor slag thick.Its bottom was to the vertical range H of base plate when transverse arm arrived lower limit
ArmCan obtain by measuring, be a steady state value, the thick H of slag
SlagIt also is a steady state value.Transverse arm can descend along with the fusing of consumable electrode in reflow process, when transverse arm arrives lower limit, every group of consumable electrode all is melted to only surplus consumable electrode remainder, because the weight of every group of consumable electrode and identical length are together, and the consumable electrode remainder length L of every group of consumable electrode design
SurplusAlso all equate, therefore when every group of comsumable melt extremely only during surplus consumable electrode remainder, the height △ H that ESR ingot increases
IngotAlso identical.When the 1st group of consumable electrode feeding only is melted to surplus consumable electrode remainder, i.e. the 1st group of consumable electrode feeding fusing when transverse arm arrives lower limit, H
Arm=L
1+ L
Surplus+ △ H
Ingot+ H
Slag, can get: L
1=H
Arm-(L
Surplus+ △ H
Ingot+ H
Slag), because L
SurplusIt is the definite value of design in advance, therefore the dummy electrode length L of the 1st group of consumable electrode
1Just determine, in like manner, when the 2nd group of consumable electrode feeding only is melted to surplus consumable electrode remainder, H
Arm=L
2+ L
Surplus+ 2 △ H
Ingot+ H
Slag, can get L
2=H
Arm-(L
Surplus+ 2 △ H
Ingot+ H
Slag), can get L after the conversion
2=L
1-△ H
Ingot, the dummy electrode length of the 2nd group of consumable electrode can determine that also the rest may be inferred, the dummy electrode length of n group consumable electrode is L
n=L
1-(n-1) * △ H
Ingot
(3) esr: behind the dummy electrode of each fixing corresponding length in group consumable electrode top, the dummy electrode of the 1st group of consumable electrode is fixed on the transverse arm bottom surface carries out esr, when the 1st group of consumable electrode feeding melted when transverse arm arrives lower limit, change the 2nd group of consumable electrode and carry out esr, when the 2nd group of consumable electrode feeding melted when transverse arm arrives lower limit, change the 3rd group of consumable electrode and carry out esr, carry out esr according to this, intact until wholeization of consumable electrode, in the esr process, the residue length of each mutually every group consumable electrode is always the consumable electrode remainder length L of design
Surplus, during actual production, as long as on each group consumable electrode top the dummy electrode of fixing corresponding length, again dummy electrode is fixed on the transverse arm bottom and just can carries out esr.Transverse arm can descend along with the fusing of consumable electrode in melting process, when treating that transverse arm drops to lowest part (during lower limit), illustrate that this group consumable electrode has melted the replaceable consumable electrode that puts in place, the residue length (consumable electrode remainder length) that should organize consumable electrode this moment just in time is the consumable electrode remainder length L of design
SurplusThe present invention wants remaining length (the consumable electrode remainder of design) to calculate the dummy electrode length of respectively organizing consumable electrode according to consumable electrode, then at the dummy electrode of each fixing corresponding length in group consumable electrode top, again dummy electrode is fixed on transverse arm.Position-limiting action when utilizing transverse arm to arrive lower limit in the process of every group of comsumable melt reaches the purpose of accurate control consumable electrode remainder, and production cost is low, and equipment is simple, less investment, and technology is flexible, and adaptability, controllability are strong, and operation being easy to grasp.In addition, when every group of comsumable melt put in place, transverse arm had dropped to lowest part, can not reduce again, consumable electrode remainder and dummy electrode can not insert in the slag again, thereby can avoid dummy electrode being dissolved the quality accident that causes the ESR ingot composition to change in the stove because of careless manipulation.
As preferably, the consumable electrode remainder length L of design
SurplusBe 20 ~ 50mm.Because the short net of electroslag furnace is a big current work system, particularly the short net working current of large-size electroslag furnace is up to tens thousand of peaces, short net length has material impact to the melting power consumption, to reduce short net length to reduce the melting power consumption as far as possible, in esr process, have only electrode and dummy electrode influential to changing short net length, under the certain situation of every group of consumable electrode length, according to L
1=H
Arm-L
Surplus-△ H
Ingot-H
SlagAnd L
n=L
1-(n-1) * △ H
IngotAs can be known, it is relevant with the control length of every group of consumable electrode remainder to lack net length.The control length of consumable electrode remainder is long, and then dummy electrode is too short, is unfavorable for improving the utilization ratio of consumable electrode, and the control length of consumable electrode remainder is too short, and then dummy electrode is long, is unfavorable for reducing the melting power consumption.The control length of every group of consumable electrode remainder is 20 ~ 50mm, when guaranteeing to improve the consumable electrode utilization ratio, can reduce the melting power consumption again, reduces cost.
As preferably, the dummy electrode diameter on every group of consumable electrode is all less than the consumable electrode diameter.
Therefore, the present invention has following beneficial effect:
(1) can accurately control consumable electrode remainder length, improve the consumable electrode utilization ratio, thereby can avoid simultaneously dummy electrode being dissolved the quality accident that causes the ESR ingot composition to change in the stove because of careless manipulation;
(2) reduce the melting power consumption, reduce the production cost of ESR ingot;
(3) technology is flexible, and adaptability, controllability are strong, simple to operate;
(4) equipment is simple, less investment.
Description of drawings
Fig. 1 is the view of the 1st group of comsumable melt when transverse arm arrives lower limit among the present invention.
Among the figure: consumable electrode remainder 1, dummy electrode 2, transverse arm 3, base plate 4, ESR ingot 5, three-phase electricity slag hearth 6, slag 7.
Embodiment
Below by specific embodiment technical scheme of the present invention is described in further detail.Should be appreciated that enforcement of the present invention is not limited to the following examples, any pro forma accommodation and/or change that the present invention is made all will fall into protection domain of the present invention.
Embodiment
Adopt the consumable electrode of 24 φ 480mm in three-phase electricity slag hearth 6, to produce 80t ESR ingot 5 (00Cr
17Ni
12Mo
2N), the increase height △ H of ESR ingot 5 when every group of comsumable melt to transverse arm 3 is in lower limit
IngotBe 500mm, the thick H of slag
SlagBe 300 mm, H
Arm Transverse arm 3 is 5000mm to the vertical range of base plate 4 when being in lower limit for transverse arm 3, and consumable electrode remainder 1 length of every group of consumable electrode of design is 30mm, therefore is fixed on the 1st group of dummy electrode 2 length on the consumable electrode according to L
1=H
Arm-L
Surplus-△ H
Ingot-H
SlagCan get L
1=4170mm is arranged on the 2nd group of dummy electrode 2 length on the consumable electrode according to L
2=L
1-△ H
IngotCan get L
2=3670 mm are arranged on the 3rd group of dummy electrode 2 length on the consumable electrode according to L
n=L
1-(n-1) * △ H
IngotCan get L
3=3170mm, the rest may be inferred, and it is as shown in table 1 to be arranged on dummy electrode 2 length of respectively organizing on the consumable electrode.
Table 1 is respectively organized the dummy electrode length on the consumable electrode
The corresponding length dummy electrode 2 as shown in table 1 of burn-oning on every group of consumable electrode top during production, dummy electrode 2 diameters are φ 250mm, again dummy electrode 2 tops being clamped to transverse arm 3 bottoms gets final product, when the 1st group of consumable electrode begins to melt, ESR ingot 5 highly begins to rise, and 3 of transverse arms slowly descend, when dropping to minimum to transverse arm 3, the 1st group of consumable electrodeization puts in place, the height △ H that ESR ingot 5 increases
IngotBe 500mm, because transverse arm 3 can not descend again, consumable electrode can not enter slag 7, therefore can not melt, this moment, the consumable electrode remainder 1 of 30mm and the dummy electrode 2 of 4170mm just only were left in slag 7 tops, treated that the 1st group of consumable electrode groupization puts in place, then changing the 2nd group of consumable electrode continues to produce, remelting according to this, every mutually like this, till wholeization of consumable electrode group are intact.
The long 30mm of consumable electrode remainder in the present embodiment, with consumable electrode substance 1.42t/m, 8.1 ten thousand yuan/t of consumable electrode cost, 8.5 ten thousand yuan/t of ESR ingot total cost meter, consumable electrode remainder are worth and are:
8.1 ten thousand yuan of ten thousand yuan/t * 1.42t/m * 0.03m * 24=8.28,
And the consumable electrode remainder reached 300mm in the past, equally with consumable electrode substance 1.42t/m, and 8.1 ten thousand yuan/t of consumable electrode cost, 8.5 ten thousand yuan/t of ESR ingot total cost meter, consumable electrode remainder are worth and are:
8.1 ten thousand yuan of ten thousand yuan/t * 1.42t/m * 0.3m * 24=82.81,
Adopt the present invention to produce a 80t ESR ingot (00Cr
17Ni
12Mo
2N), by control consumable electrode remainder length be 30mm method institute directly the economic benefit of acquisition be:
8.1 ten thousand yuan of ten thousand yuan/t * 1.42t/m * (0.3m-0.03m) * 24=74.53,
And the ESR ingot of producing is more heavy, and required consumable electrode is more many, and the economic benefit of acquisition is then more obvious.
The present invention can reduce the production cost of ESR ingot greatly by accurately controlling the consumable electrode remainder to improve the consumable electrode utilization ratio.
Above preferred embodiment just is used for description and interpretation content of the present invention, does not constitute the restriction to content of the present invention.Although the contriver has done in more detail the present invention and has enumerated, but, the content that those skilled in the art discloses according to summary of the invention part and embodiment, can make various modifications or/and to replenish or adopt similar mode to substitute be obvious to described specific embodiment, and can realize technique effect of the present invention, therefore, give unnecessary details no longer one by one herein.
Claims (3)
1. the accurate method of control consumable electrode remainder in the esr is characterized in that described method may further comprise the steps:
(1) design consumable electrode remainder length L
Surplus
(2) the dummy electrode length of consumable electrode is respectively organized in design: the dummy electrode length of the 1st group of consumable electrode is L
1=H
Arm-L
Surplus-△ H
Ingot-H
Slag, the dummy electrode length of the 2nd group of consumable electrode is L
2=H
Arm-(L
Surplus+ 2 △ H
Ingot+ H
Slag), can get L after the conversion
2=L
1-△ H
Ingot, the rest may be inferred, and the dummy electrode length of n group consumable electrode is L
n=L
1-(n-1) * △ H
Ingot, in the formula: H
ArmIts bottom is to the vertical range of base plate, △ H when arriving lower limit for transverse arm
IngotBe every group of comsumable melt height that ESR ingot increases when transverse arm arrives lower limit, H
SlagFor slag thick;
(3) esr: behind the dummy electrode of each fixing corresponding length in group consumable electrode top, the dummy electrode of the 1st group of consumable electrode is fixed on the transverse arm bottom surface carries out esr, when the 1st group of consumable electrode feeding melted when transverse arm arrives lower limit, change the 2nd group of consumable electrode and carry out esr, when the 2nd group of consumable electrode feeding melted when transverse arm arrives lower limit, change the 3rd group of consumable electrode and proceed esr, carry out esr according to this, intact until wholeization of consumable electrode, in the esr process, the residue length of each mutually every group consumable electrode is always the consumable electrode remainder length L of design
Surplus
2. accurately control the method for consumable electrode remainder in a kind of esr according to claim 1, it is characterized in that the consumable electrode remainder length L of design
SurplusBe 20 ~ 50mm.
3. the accurate method of control consumable electrode remainder in a kind of esr according to claim 1 and 2 is characterized in that, the dummy electrode diameter on every group of consumable electrode is all less than the consumable electrode diameter.
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| CN105945260A (en) * | 2016-06-02 | 2016-09-21 | 浙江电渣核材有限公司 | Electroslag remelting method for producing large steel ingots by plurality of small furnaces |
| CN108950230B (en) * | 2018-08-20 | 2019-11-08 | 东北大学秦皇岛分校 | A kind of electroslag remelting process and its electrode replacing options |
| CN109055771B (en) * | 2018-08-20 | 2019-11-08 | 东北大学秦皇岛分校 | ESR system and its electrode replace control device |
| CN110193591A (en) * | 2019-06-05 | 2019-09-03 | 太仓市华鑫轧辊有限公司 | A kind of cylinder shape Forging reparation set hollow electroslag remelting device of blank |
| CN110640120B (en) * | 2019-10-30 | 2022-09-30 | 上海电气上重铸锻有限公司 | Manufacturing device and manufacturing method of stainless steel electroslag remelting steel ingot |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1924364A1 (en) * | 1968-05-14 | 1969-11-27 | Ass Elect Ind | Control device for a device for the electrorefining of metals |
| DE3600662A1 (en) * | 1986-01-09 | 1987-07-16 | Mannesmann Ag | Method and device for measuring the lowering depth of an electrode of an arc furnace |
| US4843234A (en) * | 1988-04-05 | 1989-06-27 | The Babcock & Wilcox Company | Consumable electrode length monitor based on optical time domain reflectometry |
| CN102297669A (en) * | 2011-01-25 | 2011-12-28 | 东北大学 | Soft measuring method for residue length of melted electrode of electroslag furnace |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6010589A (en) * | 1983-06-30 | 1985-01-19 | 日本鋼管株式会社 | Electrode length measuring device of steel production electric furnace |
| JPS62172211A (en) * | 1986-01-27 | 1987-07-29 | Nippon Kokan Kk <Nkk> | Method for measuring consumed length of electrode of melting furnace |
-
2012
- 2012-07-19 CN CN 201210249945 patent/CN102796881B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1924364A1 (en) * | 1968-05-14 | 1969-11-27 | Ass Elect Ind | Control device for a device for the electrorefining of metals |
| DE3600662A1 (en) * | 1986-01-09 | 1987-07-16 | Mannesmann Ag | Method and device for measuring the lowering depth of an electrode of an arc furnace |
| US4843234A (en) * | 1988-04-05 | 1989-06-27 | The Babcock & Wilcox Company | Consumable electrode length monitor based on optical time domain reflectometry |
| CN102297669A (en) * | 2011-01-25 | 2011-12-28 | 东北大学 | Soft measuring method for residue length of melted electrode of electroslag furnace |
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