CN105945260A - Electroslag remelting method for producing large steel ingots by plurality of small furnaces - Google Patents
Electroslag remelting method for producing large steel ingots by plurality of small furnaces Download PDFInfo
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- CN105945260A CN105945260A CN201610384603.5A CN201610384603A CN105945260A CN 105945260 A CN105945260 A CN 105945260A CN 201610384603 A CN201610384603 A CN 201610384603A CN 105945260 A CN105945260 A CN 105945260A
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- Prior art keywords
- electroslag remelting
- remelting
- crystallizer
- slag
- electroslag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/06—Melting-down metal, e.g. metal particles, in the mould
- B22D23/10—Electroslag casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an electroslag remelting method for producing large steel ingots by a plurality of small furnaces. The method comprises the following steps of A, electroslag remelting machinery preparation: using three-phase electroslag remelting furnaces, and installing nine consumable electrodes in each furnace of the three-phase electroslag remelting furnaces; B, slag material proportioning: proportionally mixing fused alumina, limestone and high-purity fluorite; C, remelting refining: gradually putting the proportioned slag materials into a crystallizer until all slag materials are thoroughly melted in the crystallizer, charging the materials into the consumable electrodes after most slag materials are thoroughly melted, and after the consumable electrodes in the furnace are melted to the proper degree, changing a next group of consumable electrodes for continuous remelting until the remelting of all of the consumable electrodes is completed; D, deoxygenation: continuously adding complex deoxidizers into the crystallizer while the slag materials are gradually put into the crystallizer; and E, mold stripping: performing mold stripping after 3 to 6 hours from the electroslag remelting completion, and then performing hot delivery and furnace entering. Through the electroslag remelting by the plurality of small furnaces, the content of each ingredient can be conveniently controlled.
Description
Technical field
The present invention relates to the manufacture method of a kind of steel ingot, be specifically related to a kind of multiple ports and produce the electroslag remelting process of large-scale steel ingot.
Background technology
The weight high parameter of Large-Scale Equipment, Large Copacity development so that the size of heavy forging, tonnage are increasing, and forging quality performance requirement is more and more higher.Forging is the biggest, and prescription is the highest, and the risk that forging is scrapped is the biggest.The metallurgical quality of steel ingot is basis and the prerequisite obtaining heavy forging, plays key effect in heavy forging produces.
The production of steel ingot is generally divided into two steps, i.e. melting and casting.Electroslag remelting then unites two into one melting and casting two procedures, and in same metal pattern, two procedures is carried out simultaneously, completes simultaneously, and ingot mould is Forced water cooling.In esr process, metal is microfusion in the form of a film in slag bath, and slag/steel reaction contact surface is big, and slag temperature is high, and slag bath enlivens, and metal is purified by the strongly effective refine of slag.During carrying out while remelting and ingot casting, molten steel does not the most contact refractory material, not ingress of air, from pollution and the secondary oxidation of refractory material.Particularly ESR ingot solidification is not common natural cooling, but carries out under the steepest temperature gradient conditions of Forced water cooling, has the progressive Crystallization Characteristics of orientation.So, both refine purified the good condition of metal to electroslag remelting from internal invention, the source of field trash has been stopped again from outside, especially have for crystallizing vital superior cooling condition, also melting and ingot casting two procedures are united two into one, the most do not contact refractory material, avoid secondary oxidation.These, for solving the big metallurgical quality difficult problem of " degree of purity " and " uniformity " two of large steel ingot in the world today, providing the optimum condition both combined closely, and equipment is simple, investment is saved, technique is flexible, adaptability, controllability are strong, and operation is prone to grasp, and reliability is high, economical rationality is effective, is to produce the huge steel ingot of the heavy forging particularly high-alloy steel preferable method of huge steel ingot.
Summary of the invention
For the problems referred to above, it is an object of the invention to solve prior art in carrying out large-scale ESR ingot production process, controlling the problem that each composition high uniformity exists, and providing a kind of and utilize existing bogey to produce some stove consutrodes by producing the electroslag remelting process of large-scale steel ingot with multiple ports of the large-scale ESR ingot of little molten the earth acquisition high uniformity.
Concrete technical scheme is as follows:
A kind of multiple ports produce the electroslag remelting process of large-scale steel ingot, following steps:
The preparation of A, electroslag remelting machinery: use three-phase slag remelting furnace, and nine consutrodes are set in each stove in three electroslag refining furnaces；
B, proportioning slag charge: electro-corundum, limestone, high-purity fluorite are mixed in proportion；
C, remelting refining: slag charge good for proportioning is gradually put in crystallizer, and until slag charge is all clear in crystallizer internalization, consutrode is loaded after most slag charges are all changed clearly, after the comsumable melt in stove puts in place, change to next group consutrode continuation remelting complete to all consutrode remeltings；
D, deoxidation: if continuing double deoxidizer while gradually being put in crystallizer by slag charge in crystallizer；
E, the demoulding: electroslag remelting terminates the demoulding in latter 3-6 hour, and then heat sends into stove.
Further, in step B, electro-corundum, limestone, the percentage composition of high-purity fluorite are 30%:20%:50%.
Further, in step D, double deoxidizer includes Si, Al, B and Os, and the weight ratio of Si, Al, B and Os is 11:7:1.5:1.5.
Further, in step D, every 4min adds once-combined deoxidizer in crystallizer, and, every ESR ingot puts into the double deoxidizer of 2kg.
The present invention utilizes existing bogey to produce some stove consutrodes by with the little molten large-scale ESR ingot obtaining greatly high uniformity cost-effectively.Save the huge investment built needed for large-scale steelmaking equipment, it is also possible to giving full play to the ability of existing small-sized smelting equipment, electroslag furnace plant equipment is the lightest simultaneously, is moved easily and installs, and meanwhile, stove transformer capacity is greatly reduced.
Detailed description of the invention
A kind of multiple ports produce the electroslag remelting process of large-scale steel ingot, the preparation of following steps: A, electroslag remelting machinery: use three-phase slag remelting furnace, and arrange nine consutrodes in three electroslag refining furnaces in each stove；B, proportioning slag charge: electro-corundum, limestone, high-purity fluorite are mixed in proportion, electro-corundum, limestone, the percentage composition of high-purity fluorite are 30%:20%:50%；C, remelting refining: slag charge good for proportioning is gradually put in crystallizer, and until slag charge is all clear in crystallizer internalization, consutrode is loaded after most slag charges are all changed clearly, after the comsumable melt in stove puts in place, change to next group consutrode continuation remelting complete to all consutrode remeltings；D, deoxidation: if continuing double deoxidizer while gradually being put in crystallizer by slag charge in crystallizer, double deoxidizer includes Si, Al, B and Os, and, the weight ratio of Si, Al, B and Os is 11:7:1.5:1.5, simultaneously, every 4min adds once-combined deoxidizer in crystallizer, and, every ESR ingot puts into the double deoxidizer of 2kg；E, the demoulding: electroslag remelting terminates the demoulding in latter 3-6 hour, and then heat sends into stove.
Above embodiment is only to be described the preferred embodiment of the present invention, is not defined the spirit and scope of the present invention.On the premise of without departing from design concept of the present invention; various modification that technical scheme is made by this area ordinary person and improvement; protection scope of the present invention all should be dropped into, the technology contents that the present invention is claimed, all record in detail in the claims.
Claims (4)
1. the electroslag remelting process of multiple ports production large-scale steel ingot, it is characterised in that following steps:
The preparation of A, electroslag remelting machinery: use three-phase slag remelting furnace, and in described three electroslag refining furnaces, in each stove, nine consutrodes are set；
B, proportioning slag charge: electro-corundum, limestone, high-purity fluorite are mixed in proportion；
C, remelting refining: described slag charge good for proportioning is gradually put in crystallizer, and until described slag charge is all clear in described crystallizer internalization, described consutrode is loaded after most slag charges are all changed clearly, after the described comsumable melt in stove puts in place, change to next group consutrode continuation remelting complete to all consutrode remeltings；
D, deoxidation: if continuing double deoxidizer while gradually being put in described crystallizer by described slag charge in described crystallizer；
E, the demoulding: electroslag remelting terminates the demoulding in latter 3-6 hour, and then heat sends into stove.
Multiple ports the most according to claim 1 produce the electroslag remelting process of large-scale steel ingot, it is characterised in that: electro-corundum described in described step B, described limestone, the percentage composition of described high-purity fluorite are 30%:20%:50%.
Multiple ports the most according to claim 2 produce the electroslag remelting process of large-scale steel ingot, it is characterized in that: double deoxidizer described in described step D includes that Si, Al, B and Os, the weight ratio of described Si, described Al, described B and described Os are 11:7:1.5:1.5.
Multiple ports the most according to claim 3 produce the electroslag remelting process of large-scale steel ingot, it is characterised in that in described step D, every 4min adds the most described double deoxidizer in described crystallizer, and, every ESR ingot puts into the described double deoxidizer of 2kg.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610384603.5A CN105945260A (en) | 2016-06-02 | 2016-06-02 | Electroslag remelting method for producing large steel ingots by plurality of small furnaces |
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| CN201610384603.5A CN105945260A (en) | 2016-06-02 | 2016-06-02 | Electroslag remelting method for producing large steel ingots by plurality of small furnaces |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139364A (en) * | 2020-01-22 | 2020-05-12 | 上海电气上重铸锻有限公司 | Manufacturing method of over 40 tons of 9Ni large steel ingots |
| CN111206159A (en) * | 2020-03-05 | 2020-05-29 | 沈阳麒飞新型材料科技有限公司 | Combined electroslag furnace device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1358776A (en) * | 1971-06-11 | 1974-07-03 | Inst Elektroswarki Patona | Method of electroslag casting of ingots |
| CN1059371A (en) * | 1990-08-20 | 1992-03-11 | 上海重型机器厂 | The electroslag remelting technique of the low aluminium of control |
| CN101396728A (en) * | 2007-09-28 | 2009-04-01 | 上海重型机器厂有限公司 | Manufacture method of steel ingot for million multikilowatt nuclear electricity pile core component |
| CN101469370A (en) * | 2007-12-28 | 2009-07-01 | 上海重型机器厂有限公司 | Method for manufacturing large-sized high purity 12Cr% low-ilicon low-aluminum electroslag remelting steel ingot |
| CN102463347A (en) * | 2010-11-16 | 2012-05-23 | 河南黄河旋风股份有限公司 | Composite deoxidizing agent |
| CN102794437A (en) * | 2012-07-18 | 2012-11-28 | 浙江电渣核材有限公司 | Electroslag remelting method for producing large steel ingot by multiple small furnaces |
| CN102796881A (en) * | 2012-07-19 | 2012-11-28 | 浙江电渣核材有限公司 | Method of accurately controlling consumable electrode remainder in electroslag remelting |
| CN102794438A (en) * | 2012-07-20 | 2012-11-28 | 浙江电渣核材有限公司 | Low hydrogen control method for electroslag remelting |
-
2016
- 2016-06-02 CN CN201610384603.5A patent/CN105945260A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1358776A (en) * | 1971-06-11 | 1974-07-03 | Inst Elektroswarki Patona | Method of electroslag casting of ingots |
| CN1059371A (en) * | 1990-08-20 | 1992-03-11 | 上海重型机器厂 | The electroslag remelting technique of the low aluminium of control |
| CN101396728A (en) * | 2007-09-28 | 2009-04-01 | 上海重型机器厂有限公司 | Manufacture method of steel ingot for million multikilowatt nuclear electricity pile core component |
| CN101469370A (en) * | 2007-12-28 | 2009-07-01 | 上海重型机器厂有限公司 | Method for manufacturing large-sized high purity 12Cr% low-ilicon low-aluminum electroslag remelting steel ingot |
| CN102463347A (en) * | 2010-11-16 | 2012-05-23 | 河南黄河旋风股份有限公司 | Composite deoxidizing agent |
| CN102794437A (en) * | 2012-07-18 | 2012-11-28 | 浙江电渣核材有限公司 | Electroslag remelting method for producing large steel ingot by multiple small furnaces |
| CN102796881A (en) * | 2012-07-19 | 2012-11-28 | 浙江电渣核材有限公司 | Method of accurately controlling consumable electrode remainder in electroslag remelting |
| CN102794438A (en) * | 2012-07-20 | 2012-11-28 | 浙江电渣核材有限公司 | Low hydrogen control method for electroslag remelting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139364A (en) * | 2020-01-22 | 2020-05-12 | 上海电气上重铸锻有限公司 | Manufacturing method of over 40 tons of 9Ni large steel ingots |
| CN111206159A (en) * | 2020-03-05 | 2020-05-29 | 沈阳麒飞新型材料科技有限公司 | Combined electroslag furnace device |
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Application publication date: 20160921 |
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