CN103495715A - Vacuum continuous casting nickel and nickel alloy billet production method - Google Patents
Vacuum continuous casting nickel and nickel alloy billet production method Download PDFInfo
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- CN103495715A CN103495715A CN201310416971.XA CN201310416971A CN103495715A CN 103495715 A CN103495715 A CN 103495715A CN 201310416971 A CN201310416971 A CN 201310416971A CN 103495715 A CN103495715 A CN 103495715A
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Abstract
Provided is a vacuum continuous casting nickel and nickel alloy billet production method. When an electron beam cooling bed smelting furnace is in a vacuum state, the function that a crystallizer can achieve continuous ingot casting is utilized completely, a vacuum continuous casting billet pulling system is adopted, large-size nickel and nickel alloy billets are cast continuously, the biggest length can achieve 8000mm, and the weight can achieve 10 tons. The defects that as for electric stove smelting method and other methods, energy consumption is high and the nickel billets more than 500 KG in weight can not be smelted are overcome. The vacuum continuous casting nickel and nickel alloy billet production method has the advantages of improving nickel and nickel alloy smelting efficiency, improving briquetting quality, obviously reducing the occupied area of a briquetting machine, improving smelting quality, and reducing energy consumption.
Description
Technical field
The invention belongs to nickel and nickel alloy smelting process technical field.
Background technology
The method of modern production nickel mainly contains two kinds of pyrogenic process and wet methods.According to the difference of main two class nickel-containing minerals (nickeliferous sulphide ore and oxide ore) in the world, the metallurgy method is different.Containing Ni sulphide mine main employing pyrogenic attack at present, by the electrolysis of concentrate roasting reverberatory furnace (electric furnace or blast furnace) copper smelting nickel sulphur blowing nickel ore concentrate, obtain metallic nickel.Oxide ore is mainly nickel-bearing laterite, and its grade is low, is suitable for wet-treating; Main method has two kinds of ammonia leaching process and sulfuric acid process.The pyrogenic attack of oxide ore is the ferronickel method.
No matter the nickel of which kind of method melting, all adopt the method for die casting nickel to be cast into to the nickel ingot of different size, but due to, the restriction of mould, the nickel ingot of casting generally is no more than 500KG, and surface oxide layer is thicker, during for the rolling of high standard nickel plate, lumber recovery is lower, and metal loss is larger, and cost is higher.
Summary of the invention
Purpose of the present invention is exactly in order to improve nickel and nickel alloy smelting efficiency, improves nickel ingot quality, significantly shortens the production time, improves the melting quality, reduces energy consumption.
The objective of the invention is to realize by following technical solution.
onekind of vacuum continuous casting nickel and nickel alloy billet production method, feature of the present invention is, adopts the vacuum continuous casting to draw the ingot system, the heavy 10000KG nickel of founding large scale (1050mm * 210mm * 8000mm) and nickel alloy billet, concrete grammar is:
With electron beam cold hearth melting stove melting nickel ingot the time, first neat the putting into left and right charging frame by the nickel block raw material.Lay special stress on can not have water, because there is water can reduce vacuum, increases the possibility that nickel is inhaled hydrogen simultaneously; Then stove each several part sealing is carried out to vacuum drawn, by vacuum degree control 1.0 * 10
-3torr; When vacuum reaches the entry condition of electron gun, open high voltage source and prepared the rifle melting.When nickel liquid is filled whole cold bed and is about to enter crystallizer, the light beam of No. 6 rifles is gathered to any and move on dummy bar head its thawing.After thawing, the nickel liquid in cold bed is put into to crystallizer, in the time of 1-2 centimetres to the crystallizer edge of nickel liquid in crystallizer, reduce the electric current of electron gun, carry out cooling nickel head; When cooling 15 minutes of nickel head by the nickel head of ingot after drop-down 40mm, continue thawing during the current value of the electric current that continues successively to improve rifle when melting nickel block; Nickel liquid enters crystallizer and runs into after the water-cooled copper wall solidification and crystallization rapidly, and slow decreasing under the drive of drawing the ingot system, like this, constantly have nickel liquid to flow into crystallizer, pulls out again crystallizer after crystallization, forms the process of a direct casting.The longest 8000mm that reaches of nickel ingot of the present invention, weight reaches 10 tons.
The invention has the beneficial effects as follows, improve nickel and nickel alloy smelting efficiency, improve the briquetting quality, significantly compress the cuber occupied ground, improve the melting quality, reduce energy consumption.After the invention process, production efficiency significantly improves, and the monolithic energy consumption descends 6%, and production capacity has improved 80%.
concrete implementation result
onekind of vacuum continuous casting nickel and nickel alloy billet production method, feature of the present invention is, adopts the vacuum continuous casting to draw the ingot system, the heavy 10000KG nickel of founding large scale (1050mm * 210mm * 8000mm) and nickel alloy billet, concrete grammar is:
With electron beam cold hearth melting stove melting nickel ingot the time, first neat the putting into left and right charging frame by the nickel block raw material.Lay special stress on can not have water, because there is water can reduce vacuum, increases the possibility that nickel is inhaled hydrogen simultaneously; Then stove each several part sealing is carried out to vacuum drawn, by vacuum degree control 1.0 * 10
-3torr; When vacuum reaches the entry condition of electron gun, open high voltage source and prepared the rifle melting.When nickel liquid is filled whole cold bed and is about to enter crystallizer, the light beam of No. 6 rifles is gathered to any and move on dummy bar head its thawing.After thawing, the nickel liquid in cold bed is put into to crystallizer, in the time of 1-2 centimetres to the crystallizer edge of nickel liquid in crystallizer, reduce the electric current of electron gun, carry out cooling nickel head; When cooling 15 minutes of nickel head by the nickel head of ingot after drop-down 40mm, continue thawing during the current value of the electric current that continues successively to improve rifle when melting nickel block; Nickel liquid enters crystallizer and runs into after the water-cooled copper wall solidification and crystallization rapidly, and slow decreasing under the drive of drawing the ingot system, like this, constantly have nickel liquid to flow into crystallizer, pulls out again crystallizer after crystallization, forms the process of a direct casting.The longest 8000mm that reaches of nickel ingot of the present invention, weight reaches 10 tons.
Concrete technology flow scheme of the present invention is: under vacuum, the negative electrode of electron gun is heated and produces the thermoelectron effusion.Under the effect of accelerating potential (being greater than 30kV), thermoelectron anode (zero potential) accelerated motion.Due to the effect of bunching electrode, electron beam passes through from the centre bore of anode, continues downwards motion, through the adjusting of multi-focusing and the magnetic scanning lens of magnetic focusing lens, makes electron beam accurately and the surface of fuel rod is bombarded in concentrated area.Produce 1400 ° of temperature more than C at raw material and weld pool surface, the surface of raw material is heated, melts, splashes in molten bath.Molten bath is exactly the melt portions of ingot upper end, around it, is water jacketed copper crucible (crystallizer).Due to the heat effect of electron beam, molten bath keeps constantly upper and lower, inside and outside convection current.Along with the raw material melted constantly splashes into, weld pool surface constantly rises, and drags ingot device again ingot constantly to be pulled downwards, and weld pool surface is kept certain height.
Utilize the electron gun in stove tens to hundreds of kW high-power electron beam can be focused on the focus of 1cm2 left and right, produce the above high temperature of 1400 ° of C.When high-power electron beam focuses on the nickel raw metal, just can, by these metal moltens, reach the purpose of melting or purification.Because high-temperature area is limited, molten metal need to splash into following molten bath bit by bit, nickel liquid enters crystallizer and runs into after the water-cooled copper wall solidification and crystallization rapidly, slow decreasing under the drive of drawing the ingot system, like this, constantly there is nickel liquid to flow into crystallizer, pull out again crystallizer after crystallization, form the process of a direct casting, be frozen into ingot.The longest 8000mm that reaches of billet, weight reaches 10 tons.Owing to being that nickel ingot surface anaerobic changes in the vacuum environment casting, quality is well more a lot of than orthodox casting method.
The equipment basic parameter
One, electron beam cold hearth melting stove
Power: 3150KW
Output: 4000 tons of nickel ingots
Product weight: 10 tons/root
Product specification: 1050mm * 210mm * 8000mm.
Claims (1)
1.
oneplant vacuum continuous casting nickel and nickel alloy billet production method, it is characterized in that, adopt the vacuum continuous casting to draw the ingot system, founding large scale: 1050mm * 210mm * 8000mm, heavy 10000KG nickel and nickel alloy billet, its method is:
With electron beam cold hearth melting stove melting nickel ingot the time, first neat the putting into left and right charging frame by the nickel block raw material; Then stove each several part sealing is carried out to vacuum drawn, by vacuum degree control 1.0 * 10
-3torr; When vacuum reaches the entry condition of electron gun, open high voltage source and prepared the rifle melting; When nickel liquid is filled whole cold bed and is about to enter crystallizer, the light beam of No. 6 rifles is gathered to any and move on dummy bar head its thawing; After thawing, the nickel liquid in cold bed is put into to crystallizer, in the time of 1-2 centimetres to the crystallizer edge of nickel liquid in crystallizer, reduce the electric current of electron gun, carry out cooling nickel head; When cooling 15 minutes of nickel head by the nickel head of ingot after drop-down 40mm, continue thawing during the current value of the electric current that continues successively to improve rifle when melting nickel block; Nickel liquid enters crystallizer and runs into after the water-cooled copper wall solidification and crystallization rapidly, and slow decreasing under the drive of drawing the ingot system, like this, constantly have nickel liquid to flow into crystallizer, pulls out again crystallizer after crystallization, forms the process of a direct casting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310416971.XA CN103495715A (en) | 2013-09-13 | 2013-09-13 | Vacuum continuous casting nickel and nickel alloy billet production method |
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| CN201310416971.XA CN103495715A (en) | 2013-09-13 | 2013-09-13 | Vacuum continuous casting nickel and nickel alloy billet production method |
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| CN103495715A true CN103495715A (en) | 2014-01-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308107A (en) * | 2014-10-10 | 2015-01-28 | 河南理工大学 | Vertical guide type vacuum melting inert gas shielding continuous feeding continuous casting machine |
| CN116479252A (en) * | 2023-06-19 | 2023-07-25 | 北京中辰至刚科技有限公司 | Electron beam melting device for high-entropy alloy and operation method thereof |
Citations (4)
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|---|---|---|---|---|
| CN1067397A (en) * | 1991-06-05 | 1992-12-30 | 通用电气公司 | Method and apparatus with the metal material of ingot form casting electron beam melting |
| US7114548B2 (en) * | 2004-12-09 | 2006-10-03 | Ati Properties, Inc. | Method and apparatus for treating articles during formation |
| CN101525698A (en) * | 2009-04-23 | 2009-09-09 | 金川集团有限公司 | Method for preparing high-purity nickel ingot |
| CN103290230A (en) * | 2013-04-10 | 2013-09-11 | 大连理工大学 | Preparation method for nickel-based high temperature alloy by using electron beam melting |
-
2013
- 2013-09-13 CN CN201310416971.XA patent/CN103495715A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067397A (en) * | 1991-06-05 | 1992-12-30 | 通用电气公司 | Method and apparatus with the metal material of ingot form casting electron beam melting |
| US7114548B2 (en) * | 2004-12-09 | 2006-10-03 | Ati Properties, Inc. | Method and apparatus for treating articles during formation |
| CN101525698A (en) * | 2009-04-23 | 2009-09-09 | 金川集团有限公司 | Method for preparing high-purity nickel ingot |
| CN103290230A (en) * | 2013-04-10 | 2013-09-11 | 大连理工大学 | Preparation method for nickel-based high temperature alloy by using electron beam melting |
Non-Patent Citations (1)
| Title |
|---|
| 尚再艳等: "镍的电子束熔炼提纯研究", 《稀有金属》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308107A (en) * | 2014-10-10 | 2015-01-28 | 河南理工大学 | Vertical guide type vacuum melting inert gas shielding continuous feeding continuous casting machine |
| CN116479252A (en) * | 2023-06-19 | 2023-07-25 | 北京中辰至刚科技有限公司 | Electron beam melting device for high-entropy alloy and operation method thereof |
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Application publication date: 20140108 |