CN104195356B - Smelting and purification method of beryllium beads used for casting pure beryllium ingots - Google Patents
Smelting and purification method of beryllium beads used for casting pure beryllium ingots Download PDFInfo
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- CN104195356B CN104195356B CN201410148828.1A CN201410148828A CN104195356B CN 104195356 B CN104195356 B CN 104195356B CN 201410148828 A CN201410148828 A CN 201410148828A CN 104195356 B CN104195356 B CN 104195356B
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Abstract
The invention relates to a smelting and purification method of beryllium beads used for casting pure beryllium ingots. The smelting and purification method includes completing smelting, melting down at a constant temperature and casting of the beryllium beads in a vacuum smelting furnace. The smelting and purification method adopts a vacuum smelting method. According to the smelting and purification method, (1) by a manner of matching large and small beryllium beads and feeding by steps, the beryllium beads are smelted successfully to generate a ＂bridging＂ phenomenon; (2) an inert gas is fed into the furnace to pressurize when the beryllium beads are smelted violently so as to inhibit splashing of the molten metal, and a manner of using an inclined crucible is adopted to guarantee that the melted metal liquid is in contact with an upper crusting part so as to melt the upper crusting part; and (3) the temperature is maintained for a period of time after smelting so as to guarantee full smelting of the beryllium beads and to allow impurities and gases with low melting points to be fully volatilized and slagged. The high-purity beryllium ingots needed for scrap making steps in powder metallurgy processes can be easily prepared by the smelting and purification method. Operation is easy and feasible. The smelting and purification method also can be used for waste metal recovery. Protective facilities are simple and feasible relatively.
Description
Technical field
The present invention relates to nonferrous production technical field, more particularly to a kind of pure beryllium ingot of casting is purified with the melting of beryllium pearl
Method.
Background technology
, used as a kind of metal for having a strategic importance, its good performance is in national defence and military project using very wide for metallic beryllium
It is general.The purity of metallic beryllium directly affects various performances, and what is introduced in the smelting process and follow-up melting, process of beryllium is each
Plant impurity has very strong side effect to the performance of beryllium.
It is industrial to be widely used beryllium fluoride magnesium reduction process production metallic beryllium, after reduction reaction terminates, superfluous fluorination
Beryllium and magnesium fluoride form fused mass, and metallic beryllium floats on its surface in pearl.After beryllium pearl is taken out, the slag on surface can use physics
Method is removed, but still has some impurity to remain in the inside of beryllium pearl, causes the impurity content of beryllium pearl more, so, from purification
Angle is set out beryllium pearl is carried out melting purification be very necessary.
At present, beryllium pearl carries out method of smelting of the melting method of purification using electric induction furnace, and the method exists to be difficult to obtain fits
Together in the ingot casting that bits operation needs are made in powder metallurgical technique, it is impossible to directly provide pressure processing blank, concrete operations are not allowed
Easily realize, it is impossible to also serve as old metal recovery, protective equipment complicated difficult is the weak point such as carrying out.
The content of the invention
A kind of defect it is an object of the invention to overcome above-mentioned prior art, there is provided casting for obtaining high purity metal beryllium
Make pure beryllium ingot beryllium pearl melting method of purification.
The technical scheme adopted for achieving the above object is：
One kind pure beryllium ingot beryllium pearl melting method of purification of casting, it is characterised in that its technical process is：In vacuum melting furnace
It is middle complete beryllium pearl melting, be incubated it is melting down and cast.
Beryllium pearl shove charge by the way of large and small beryllium pearl collocation dispensing, its collocation proportion scale is below diameter 2mm
10%th, 30%, the 45% of 4~5mm, the 15% of more than 5mm of 2~3mm of diameter.
The vacuum of above-mentioned vacuum melting furnace is -0.086Mpa.
In the temperature-rise period of above-mentioned melting, to rushing inert gas in vacuum melting furnace.
Inclined by operation handle in above-mentioned fusion process beryllia crucible carry out it is fluxing.
Inert gas is passed through in above-mentioned fusion process to be made to be pressurized to -0.080 Mpa in vacuum melting furnace.
It refers to be incubated 30 minutes after the completion of melting that above-mentioned insulation is melting down.
By the way of Multistep feeding, after once feeding and being completely melt, insulation is melting down, and then recycling melts for above-mentioned melting
Refining, feed 0.2Kg every time.
The cast refers to that solution in stove is poured into die cavity according to the speed of 8~10Kg/20~30 second.
The pure beryllium ingot beryllium pearl melting method of purification of present invention casting uses vacuum melting method, by fusion process：
1st, by the way of large and small beryllium pearl arranges in pairs or groups dispensing, Multistep feeding, it is ensured that beryllium pearl is smoothly melted and produces " bridge formation " existing
As；
2nd, the splash of molten metal is made to be inhibited, together to inert gas supercharging is rushed in stove when beryllium pearl acutely melts reaction
When with incline crucible mode, it is ensured that molten metal liquid touch top crust part, melt it.
3rd, held for some time after melting, it is ensured that pearl is completely melt beryllium, makes the impurity of low melting point and gas fully volatilize
And slag making；
4th, body of heater cooling water is increased after pouring into a mould, it is ensured that mould is quickly cooled down.
The pure beryllium ingot beryllium pearl melting method of purification of casting of the invention, it is easy to which acquirement is suitable for making bits in powder metallurgical technique
The high-purity ingot casting that operation needs, can directly provide pressure processing blank, and concrete operations are easily realized, can also serve as old metal and return
Receive, protective equipment is relatively easy easy.
Brief description of the drawings
Fig. 1 is the process chart of the present invention pure beryllium ingot beryllium pearl melting method of purification of casting.
Specific embodiment
The present invention casts pure beryllium ingot beryllium pearl melting method of purification, and technical process is：
1st, get the raw materials ready：Beryllium pearl go-on-go, magnetic separation, surface cleaning treatment, go-on-go, the purpose of magnetic separation are to prevent iron filings from entering.
2nd, prepurging：Beryllia crucible is cleared up, wiped clean.
3rd, shove charge：Carried out under non-vacuum in vacuum melting furnace, during graphite jig is put into body of heater, beryllium pearl load earthenware
Crucible.Beryllium pearl according to large and small beryllium pearl arrange in pairs or groups dispensing mode shove charge：Collocation proportion scale be below diameter 2mm 10%, diameter 2~
The 30% of 3mm, the 45% of 4~5mm, the 15% of more than 5mm.More than diameter 5mm is initially charged with during shove charge, then below diameter 2mm,
In 2~3mm of diameter, beryllium pearl is put into tamping in crucible in order, and the furnace roof portion that is placed in of 4~5mm of another part beryllium pearl diameter adds
In feed bin, crucible is added after being completely melt in crucible.
4th, vacuumize：Close bell, is continuously evacuated to vacuum -0.086Mpa.
5th, melting：Variable frequency switch is opened, is that induction coil is powered, power supply control flow is as follows,
10Kw/0.5h→20Kw/0.5h→30Kw/0.5h→40Kw/0.5h→50Kw。
6th, argon is rushed：In fusion process, vacuum valve is closed during power 40Kw, toward stove in be filled with inert gas argon gas, make stove
Interior vacuum is down to -0.080Mpa.（Prepare charging）
7th, feed：（Beryllium pearl in feeding chamber）Power is down to 20Kw and starts charging, is carried out according to the mode of 0.2Kg/ times,
Until the beryllium pearl in feeding chamber adds.By the way of Multistep feeding, after once feeding and being completely melt, insulation is molten for charging
Clearly, then recycling melting.
8th, refine：Power 50Kw, properly increases vacuum, situation in stove is observed at any time, until smog emission is clean in furnace charge.
9th, it is incubated：Melting is incubated molten clear 30 minutes after terminating.
10th, pour into a mould：Power 40Kw, the secondary inert gas argon gas that is filled with makes vacuum in body of heater be down to -0.070Mpa, inclines
Oblique crucible baking pouring mouth,（Prevent furnace charge splash）Poring rate:8~10Kg/20~30 second, die cavity is poured into by solution in stove
It is interior.So far, beryllium pearl melting purification is completed.
11st, cool down：Power-off is poured, ingot casting is with body of heater natural cooling.
Claims (3)
1. a kind of pure beryllium ingot beryllium pearl melting method of purification of casting, it is characterised in that its technical process is：In vacuum melting furnace
Complete the melting of beryllium pearl, be incubated melting down and cast；
Beryllium pearl shove charge by the way of large and small beryllium pearl collocation dispensing, its collocation proportion scale is not wrapped for below diameter 2mm
Include the 10% of 2mm, the 30% of 2~3mm of diameter, the 45% of 4~5mm, more than 5mm not including 5mm 15%；
The melting after once feeding and being completely melt, is incubated melting down, then recycling melting by the way of Multistep feeding,
Fed 0.2Kg every time, and inert gas is passed through in fusion process to be made to be pressurized to -0.080 Mpa in vacuum melting furnace；
It refers to be incubated 30 minutes after the completion of melting that the insulation is melting down；
The cast refers to that solution in stove is poured into die cavity according to the speed of 8~10Kg/20~30 second.
2. according to the casting pure beryllium ingot beryllium pearl melting method of purification described in claim 1, it is characterised in that above-mentioned vacuum melting
The vacuum of stove is -0.086Mpa.
3. according to the casting pure beryllium ingot beryllium pearl melting method of purification described in claim 1, it is characterised in that in above-mentioned melting
Inclined by operation handle in journey beryllia crucible carry out it is fluxing.
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| CN109097601B (en) * | 2018-08-19 | 2020-12-15 | 西北稀有金属材料研究院宁夏有限公司 | Method for effectively reducing chromium element in metallic beryllium raw material |
| CN109182786B (en) * | 2018-09-11 | 2021-12-24 | 王宇栋 | Method and device for preparing high-purity metal beryllium by volatilizing oxygen-free impurities |
| CN115652111B (en) * | 2022-11-04 | 2023-11-21 | 长沙矿冶研究院有限责任公司 | Method for recycling beryllium from beryllium-containing magnesium fluoride slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109044A (en) * | 2006-07-17 | 2008-01-23 | 贵州世纪天元矿业有限公司 | Method for improving material heating speed in metallic vacuum smelting reverting pot and reverting pod thereof |
| RU2360018C2 (en) * | 2007-06-06 | 2009-06-27 | Федеральное государственное унитарное предприятие Научно-исследовательский институт Научно-производственное объединение "Луч" | Method of beryllium preparation from beryllium condensate derived from processing uranium and beryllium composition |
| CN103663506A (en) * | 2013-12-06 | 2014-03-26 | 富蕴恒盛铍业有限责任公司 | Preparation method for refined beryllium hydroxide and preparation method for reactor-quality metallic beryllium bead from refined beryllium hydroxide |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2731105B2 (en) * | 1993-11-02 | 1998-03-25 | 日本碍子株式会社 | Manufacturing method of high purity non-porous beryllium block |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109044A (en) * | 2006-07-17 | 2008-01-23 | 贵州世纪天元矿业有限公司 | Method for improving material heating speed in metallic vacuum smelting reverting pot and reverting pod thereof |
| RU2360018C2 (en) * | 2007-06-06 | 2009-06-27 | Федеральное государственное унитарное предприятие Научно-исследовательский институт Научно-производственное объединение "Луч" | Method of beryllium preparation from beryllium condensate derived from processing uranium and beryllium composition |
| CN103663506A (en) * | 2013-12-06 | 2014-03-26 | 富蕴恒盛铍业有限责任公司 | Preparation method for refined beryllium hydroxide and preparation method for reactor-quality metallic beryllium bead from refined beryllium hydroxide |
Non-Patent Citations (1)
| Title |
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| 金属铍的生产;杨雨浓;《稀有金属与硬质合金》;19900331(第100期);61-62 * |
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Address after: 753000 No. 119 metallurgical Road, Dawukou District, Shizuishan, the Ningxia Hui Autonomous Region Patentee after: Northwest rare metal materials research institute Ningxia Co., Ltd. Address before: 753000 No. 119 metallurgical Road, Dawukou District, Shizuishan, the Ningxia Hui Autonomous Region Patentee before: Xibei Inst. of Rare Metal Material |
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