CN1044620C - Refining agent for molten copper and preparation method - Google Patents
Refining agent for molten copper and preparation method Download PDFInfo
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- CN1044620C CN1044620C CN95110174A CN95110174A CN1044620C CN 1044620 C CN1044620 C CN 1044620C CN 95110174 A CN95110174 A CN 95110174A CN 95110174 A CN95110174 A CN 95110174A CN 1044620 C CN1044620 C CN 1044620C
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- refining agent
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- copper liquid
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Abstract
The present invention provides a novel pure copper refining agent and a preparation method. The refining agent has the chemical composition percentage (weight percentage) of 1 to 5% of B, 1 to 5% of Mg, 1 to 6% of Re and Cu as the rest. The refining agent has the advantages of strong deoxidation capacity, strong desulphurization capacity, good dehydrogenation effect, easy refined product removal and no copper liquid pollution, and the refining agent has a particle refining function to the copper liquid. The refining agent has the advantages of wide raw material source, low cost and is used for refining the copper liquid so as to greatly increase the metallurgy quality of the copper liquid, and the present invention is the novel refining agent with the best pure copper refining comprehensive effects at present.
Description
The invention belongs to metallurgical industry metallic copper liquid refining agent field, be meant refining agent composition of metallic copper and preparation method thereof especially.
At present, constantly study aspect the copper refining quality improving both at home and abroad, obtained certain progress.Main method of dehydrogenating has oxidation style dehydrogenation, rare gas element dehydrogenation and vacuum dehydrogenation during copper refining, but these methods all exist the disadvantage that self can't overcome.The oxidation style dehydrogenation has increased the weight of the burden of follow-up deoxidation, and rare gas element dehydrogenation dehydrogenation rate is lower, vacuum method dehydrogenation equipment complexity, cost height.Examine plain data introduction through international online: during copper refining, at present main method of deoxidation has: 1) use the phosphorus deoxidation; 2) use the lithium deoxidation; 3) use the magnesium deoxidation; 4) use the boron deoxidation; 5) use CaB
6Deoxidation.But all there is wretched insufficiency in they.Phosphorus is a kind of less expensive reductor, but it significantly reduces the electrical and thermal conductivity of copper; Lithium is not a kind of strong oxidizer, but it costs an arm and a leg, and the chemical property of lithium is active, and is easy to store and use; Magnesium also is a kind of strong reductor, but the deoxidation products MgO of magnesium is a kind of dystectic compound, easily is stranded in the copper liquid, causes the inclusion defect of copper; The deoxidation products of boron is liquid, be easy to remove, but the effect of deoxidation is inferior to magnesium and lithium; CaB
6Though deoxidation effect is good, its proportion is little, and the rate of recovery is low, influences its use.
In sum, the deoxidation of the copper that uses in the world at present, deoxygenation refining agent technology all can not satisfy the needs of high-quality product fully, influenced the copper products quality greatly, today that develops rapidly in high sophisticated technology field particularly, high conduction, high heat conduction quality product are required more and more higher, therefore improve fine copper refining techniques level and the metallurgy of copper quality has become the task of top priority.
Purpose of the present invention just is to overcome the deficiency of above-mentioned copper refining agent, designs a kind of new copper refining agent and preparation method thereof, makes the producer of those no vacuum apparatus copper metallurgys use this refining agent, can produce qualified high quality fine copper product equally.
Copper liquid refining agent of the present invention is a kind of multicomponent alloy, and its chemical constitution per-cent (weight percent) is: B=1～5%; Mg=1～5%; Re=1～6%, remainder is Cu.For the deoxidation products of this refining agent in copper liquid is in a liquid state, so that get rid of, when design mix, according to MgO-B
2O
3Phasor makes copper liquid refining composition can guarantee deoxygenation resultant B
2O
3〉=64%, MgO≤36%, molten≤1170 ℃ of its fusing point T, density D≤3.7g/cm
3Temperature is generally at 1170 ℃～1200 ℃ during the refining of copper liquid, and the density of copper is 8.69g/cm
3, therefore under copper liquid refining temperature, this refining agent deoxygenation product is liquid, its density is significantly smaller than copper liquid density again, so deoxidation products floats easily, removes.
The preparation method of copper liquid refining agent of the present invention is such.(weight percent) lumpiness＜3mm with 30% contains the B of lumpiness＜3mm of the Cu-Mg alloy and 20% (weight percent) of Mg10～20%
2O
3Or H
2B
4O
7After machinery is mixed, in plumbago crucible, melted fine copper solution in advance with 50% (weight percent), put into intermediate frequency furnace jointly, under 1400～1600 ℃, carry out reduction reaction, and cooperate stirring, after melted, be incubated 10 minutes, obtain uniform Cu-B-Mg alloy liquid, when its temperature is controlled at 1400 ℃, 1～the 6%Re that adds above-mentioned weight carries out melting again, pours into a mould the refining agent that ingot casting obtains the copper of Cu-B-Mg-Re alloy then.
This refining agent has good refining effect to copper liquid.During refining, this refining agent addition agent of accounting for copper liquid weight 4% in the fine copper melt, is stirred slightly with graphite rod, sampling detects hydrogen, oxygen, sulphur content on determinator then.Detected result shows: foreign matter content is respectively by [O] before the refining: 0.0043%; [H]: 0.00019%; [S]: 0.0046%, be reduced to [O]: 0.0015%; [H]: 0.0001%; [S]: 0.0009%, after the refining in the copper oxygen level much smaller than the standard (0.003%) of oxygen free copper.
Show through the scanning of electronic probe face: the deoxygenation product is detained in copper liquid seldom, and it is spherical that the deoxidation products of these minute quantities is in copper, and disperse distributes.
This refining agent has the crystal grain thinning effect to fine copper.After this refining agent is handled, the obvious refinement of fine copper crystal grain, the refining agent of adding 3% can make copper column crystal mean length reduce 4～5 times.
Be one embodiment of the present of invention below.
Get the Cu-Mg alloy that 30kg lumpiness＜3mm contains Mg17%, the B of lumpiness＜3mm
2O
320kg puts together and carries out mechanically mixing, the 50kg fine copper is placed in the plumbago crucible melts, treat that fusing puts into intermediate frequency furnace jointly with copper liquid and top mechanical mixture after good and smelt, its furnace temperature is heated to carries out reduction reaction under 1525 ℃, when melting, constantly stir, after melted, be incubated 10 minutes, at this moment obtained uniform Cu-B-Mg alloy liquid, when making furnace temperature reduce to 1400 ℃ then, put into 4kgRe, stir through melting in this stove, pour into ingot casting then, obtain the refining agent of Cu-B-Mg-Re copper.This refining agent is taken laboratory assay, and its chemical constitution is: B=2.8%, and Mg=2.5%, Re=2.1%, Cu=92.6% conforms with the design mix scope of this refining agent.Power taking is separated copper coin 100kg and is carried out it is carried out refining treatment.At first with copper coin 500 ℃ dry 2 hours down, put into the intermediate frequency furnace fusing then, temperature is 1190 ℃, the hydrogen of sampling detection at this moment, oxygen, sulphur content are: [O]=0.036%; [H]=0.0001%; [S]=0.0046%.Use Graphite Powder 99 covering copper liquid then, kept 20～30 minutes, sampling detects, and its result is: [O]=0.0043%; [H]=0.007%; [S]=0.0036%.After current the detection, add this refining agent 4kg, stir slightly with graphite rod, sampling detects after smelting, and its result is: [O]=0.001%; [H]=0.0001%; [S]=0.001%.
Claims (2)
1, a kind of copper liquid refining agent is characterized in that this refining agent is a kind of multicomponent alloy, and its chemical constitution (weight percent) is: B=1～5%; Mg=1～5%; Re=1～6%, remainder is Cu.
2, a kind of method for preparing the described copper liquid of claim 1 refining agent is characterized in that (weight percent) lumpiness＜3mm of 30%, contains the B of lumpiness＜3mm of the Cu-Mg alloy and 20% (weight percent) of Mg10～20%
2O
3Or H
2B
4O
7After machinery is mixed, with 50% (weight percent) the good fine copper solution of fusing in plumbago crucible, put into intermediate frequency furnace jointly, under 1400～1600 ℃, carry out reduction reaction, and cooperate stirring, after melted, be incubated 10 minutes, obtain uniform Cu-B-Mg alloy liquid, when its temperature is controlled at 1400 ℃, 1～the 6%Re that adds above-mentioned weight carries out melting again, pours into a mould the copper refining agent that ingot casting obtains the Cu-B-Mg-Re alloy then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110174A CN1044620C (en) | 1995-04-12 | 1995-04-12 | Refining agent for molten copper and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110174A CN1044620C (en) | 1995-04-12 | 1995-04-12 | Refining agent for molten copper and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133347A CN1133347A (en) | 1996-10-16 |
| CN1044620C true CN1044620C (en) | 1999-08-11 |
Family
ID=5077585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95110174A Expired - Fee Related CN1044620C (en) | 1995-04-12 | 1995-04-12 | Refining agent for molten copper and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044620C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004049234B4 (en) * | 2004-10-09 | 2011-06-09 | Xstrata Technology Pty Ltd. | Process for recovering pure copper |
| CN102912154B (en) * | 2012-11-02 | 2014-11-26 | 南阳市汇森精密仪器铸造有限公司 | Melting process for increasing conductivity of red copper |
| CN103146943B (en) * | 2013-01-14 | 2017-03-22 | 中南大学 | Red impure copper refining agent and preparation method thereof |
| CN104404263B (en) * | 2014-12-19 | 2016-10-26 | 中南大学 | A kind of copper scap composite refiner and its preparation method and application |
| CN106636668B (en) * | 2016-09-28 | 2019-01-18 | 中南大学 | A kind of waste and old electromagnetic wire copper refining agent and its preparation method and application |
| CN110527860B (en) * | 2019-09-23 | 2021-09-07 | 四川博鑫铜业有限公司 | Waste purple impure copper refining agent and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU370256A1 (en) * | 1971-03-29 | 1973-02-15 | Method of deoxidation of copper | |
| US3776719A (en) * | 1971-11-30 | 1973-12-04 | Gen Electric | Method of preparing copper for use in the arcing electrodes of a vacuum circuit interrupter |
-
1995
- 1995-04-12 CN CN95110174A patent/CN1044620C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU370256A1 (en) * | 1971-03-29 | 1973-02-15 | Method of deoxidation of copper | |
| US3776719A (en) * | 1971-11-30 | 1973-12-04 | Gen Electric | Method of preparing copper for use in the arcing electrodes of a vacuum circuit interrupter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1133347A (en) | 1996-10-16 |
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