CN104195356A - 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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- CN104195356A CN104195356A CN201410148828.1A CN201410148828A CN104195356A CN 104195356 A CN104195356 A CN 104195356A CN 201410148828 A CN201410148828 A CN 201410148828A CN 104195356 A CN104195356 A CN 104195356A
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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, particularly relate to beryllium pearl melting method of purification for the pure beryllium ingot of a kind of casting.
Background technology
Metallic beryllium is as a kind of metal that has strategic importance, and its good performance is applied very extensive in national defence and military project.The purity of metallic beryllium directly affects various performances, and the various impurity of introducing in the smelting process of beryllium and follow-up melting, the course of processing have very strong side effect to the performance of beryllium.
The industrial beryllium fluoride magnesium reduction process that uses is widely produced metallic beryllium, and after reduction reaction finishes, superfluous beryllium fluoride and magnesium fluoride form melts, and metallic beryllium floats on its surface and is pearl.After beryllium pearl is taken out, the slag on surface can be removed with physical method, but still has some impurity to remain in the inside of beryllium pearl, causes the foreign matter content of beryllium pearl more, so it is very necessary from the angle purifying, beryllium pearl being carried out to melting purification.
At present, beryllium pearl carries out the melting method that melting method of purification adopts induction furnace, the method exists and is difficult to obtain the ingot casting that is suitable for system bits operation needs in powder metallurgical technique, press working blank cannot be directly provided, concrete operations are not easy to realize, cannot doublely do scrap metal and reclaim, safeguards complicated difficult is with weak points such as implementations.
Summary of the invention
The object of the invention is to overcome the defect of above-mentioned prior art, a kind of beryllium pearl melting method of purification for the pure beryllium ingot of casting that obtains high purity metal beryllium is provided.
The technical scheme adopted is for achieving the above object:
Cast a beryllium pearl melting method of purification for pure beryllium ingot, it is characterized in that its technological process is: in vacuum melting furnace, complete the molten cleer and peaceful cast of melting, insulation of beryllium pearl.
Described beryllium pearl adopts the mode shove charge of large and small beryllium pearl collocation batching, its collocation proportion scale is that diameter 2mm is following 10%, diameter 2～3mm 30%, 4～5mm 45%, more than 5mm 15%.
The vacuum tightness of above-mentioned vacuum melting furnace is-0.086Mpa.
In the temperature-rise period of above-mentioned melting, in vacuum melting furnace, rush rare gas element.
In above-mentioned fusion process, by the operation handle arm beryllia crucible that tilts, flux.
In above-mentioned fusion process, pass into rare gas element and make to be pressurized in vacuum melting furnace-0.080 Mpa.
Molten the referring to clearly of above-mentioned insulation is incubated 30 minutes after melting completes.
Above-mentioned melting adopts the mode of Multistep feeding, and after the fusing completely of once feeding in raw material, insulation is molten clear, and then reinforced melting, at every turn reinforced 0.2Kg.
Described cast refers to according to the speed of 8～10Kg/20～30 second solution in stove is poured in die cavity.
The present invention casts pure beryllium ingot and adopts vacuum melting method by beryllium pearl melting method of purification, by fusion process:
1, adopt the mode of large and small beryllium pearl collocation batching, Multistep feeding, guarantee the fusing and produce " bridge formation " phenomenon smoothly of beryllium pearl;
2, when beryllium pearl is acutely melted reaction, in stove, rush rare gas element supercharging, the splash of molten metal is inhibited, use the mode of inclination crucible simultaneously, guarantee that molten metal liquid touches top crust part, makes its melting.
3, after melting, be incubated certain hour, guarantee that beryllium pearl melts completely, the impurity of low melting point and gas are fully volatilized and slag making;
4, after cast, strengthen body of heater water coolant, guarantee that mould is cooling fast.
Beryllium pearl melting method of purification for the pure beryllium ingot of casting of the present invention, be easy to obtain the high purity ingot casting that is suitable for system bits operation needs in powder metallurgical technique, press working blank can be directly provided, concrete operations easily realize, can doublely do scrap metal and reclaim, safeguards is relatively simple.
Accompanying drawing explanation
Fig. 1 is that the present invention casts the process flow sheet of beryllium pearl melting method of purification for pure beryllium ingot.
Embodiment
The present invention casts beryllium pearl melting method of purification for pure beryllium ingot, and technological process is:
1, get the raw materials ready: beryllium pearl go-on-go, magnetic separation, surface cleaning are processed, and the object of go-on-go, magnetic separation is to prevent that iron filings from entering.
2, prepurging: by beryllia crucible cleaning, wiped clean.
3, shove charge: in vacuum melting furnace, under antivacuum state, carry out, by graphite jig be put in body of heater, beryllium pearl packs crucible into.Beryllium pearl is according to the mode shove charge of large and small beryllium pearl collocation batching: collocation proportion scale is that diameter 2mm is following 10%, diameter 2～3mm 30%, 4～5mm 45%, more than 5mm 15%.During shove charge, first pack into more than diameter 5mm, then below diameter 2mm, at diameter 2～3mm, beryllium pearl is put into tamping in crucible in order, in the furnace roof portion that the is placed in feeding chamber of another part beryllium pearl diameter 4～5mm, until adding crucible after fusing completely in crucible again.
4, vacuumize: the bell that closes, is evacuated to vacuum tightness-0.086Mpa continuously.
5, melting: driving frequency conversion switch, is induction coil power supply, and power supply control flow process is as follows,
10Kw/0.5h→20Kw/0.5h→30Kw/0.5h→40Kw/0.5h→50Kw。
6, rush argon: in fusion process, during power 40Kw, close vacuum valve, in stove, be filled with rare gas element argon gas, make be down to-0.080Mpa of vacuum tightness in stove.(preparing reinforced)
7, reinforced: (the beryllium pearl in feeding chamber) power is down to 20Kw and is started to feed in raw material, according to the mode of 0.2Kg/ time, carry out, until the beryllium pearl in feeding chamber adds.The reinforced mode that adopts Multistep feeding, after the fusing completely of once feeding in raw material, insulation is molten clear, and then reinforced melting.
8, refining: power 50Kw, suitably improve vacuum, observe at any time situation in stove, until smog emission is clean in furnace charge.
9, insulation: melting finishes rear insulation molten clear 30 minutes.
10, cast: power 40Kw, secondary is filled with rare gas element argon gas and makes be down to-0.070Mpa of vacuum tightness in body of heater, inclination crucible baking pouring mouth, (preventing furnace charge splash) pouring speed: 8～10Kg/20～30 second, are poured into solution in stove in die cavity.So far, the melting of beryllium pearl has been purified.
11, cooling: be poured power-off, ingot casting is with body of heater naturally cooling.
Claims (9)
1. a beryllium pearl melting method of purification for the pure beryllium ingot of casting, is characterized in that its technological process is: in vacuum melting furnace, complete the molten cleer and peaceful cast of melting, insulation of beryllium pearl.
2. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that described beryllium pearl adopts the mode shove charge of large and small beryllium pearl collocation batching, its collocation proportion scale is that diameter 2mm is following 10%, diameter 2～3mm 30%, 4～5mm 45%, more than 5mm 15%.
3. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that the vacuum tightness of above-mentioned vacuum melting furnace is-0.086Mpa.
4. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that, in the temperature-rise period of above-mentioned melting, in vacuum melting furnace, rushing rare gas element.
5. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that in above-mentioned fusion process fluxing by the operation handle arm beryllia crucible that tilts.
6. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that passing into rare gas element and make to be pressurized in vacuum melting furnace-0.080 Mpa in above-mentioned fusion process.
7. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that molten the referring to clearly of above-mentioned insulation is incubated 30 minutes after melting completes.
8. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that above-mentioned melting adopts the mode of Multistep feeding, after the fusing completely of once feeding in raw material, insulation is molten clear, and then reinforced melting, at every turn reinforced 0.2Kg.
9. according to beryllium pearl melting method of purification for the pure beryllium ingot of casting claimed in claim 1, it is characterized in that described cast refers to according to the speed of 8～10Kg/20～30 second solution in stove is poured in die cavity.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097601A (en) * | 2018-08-19 | 2018-12-28 | 西北稀有金属材料研究院宁夏有限公司 | A method of chromium in metallic beryllium raw material is effectively reduced |
| CN109182786A (en) * | 2018-09-11 | 2019-01-11 | 王宇栋 | A kind of no oxygen impurities volatilization prepares the method and device of high pure metal beryllium |
| CN115652111A (en) * | 2022-11-04 | 2023-01-31 | 长沙矿冶研究院有限责任公司 | Method for recovering beryllium from beryllium-containing magnesium fluoride slag |
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| 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097601A (en) * | 2018-08-19 | 2018-12-28 | 西北稀有金属材料研究院宁夏有限公司 | A method of chromium in metallic beryllium raw material is effectively reduced |
| CN109182786A (en) * | 2018-09-11 | 2019-01-11 | 王宇栋 | A kind of no oxygen impurities volatilization prepares the method and device of high pure metal beryllium |
| 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 |
| CN115652111A (en) * | 2022-11-04 | 2023-01-31 | 长沙矿冶研究院有限责任公司 | Method for recovering beryllium from beryllium-containing magnesium fluoride slag |
| 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 |
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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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