CN104775039A - Purification method of copper/copper alloy liquid - Google Patents
Purification method of copper/copper alloy liquid Download PDFInfo
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Abstract
The invention belongs to the technical field of metallurgical casting, and particularly relates to a purification method of a copper/copper alloy liquid, which comprises the following steps: introducing one or more of oxidizers or oxidizing fluxing agents MnO2, CuO and KMnO4 into the copper liquid in a smelting furnace by using refined carrier gas as a carrier, and blowing for 2-5 minutes; after finishing blowing, standing for 10-15 minutes, and adding aluminum or phosphorus as a deoxidizer; and by using argon as a carrier gas, adding a purification and deslagging agent into the copper liquid. The purification method can utilize various existing copper raw materials and perform purification treatment in the industrial-frequency and medium-frequency induction smelting furnaces or shaft furnaces, thereby obtaining the pure high-quality copper liquid and improving the quality of the product and the added value of the raw material. In the treatment process, the method does not generate any adverse effect on the service life of the furnace lining in the existing equipment, and has the advantages of high treatment efficiency, high product quality and low treatment cost.
Description
Technical field
The invention belongs to metallurgical casting technical field, particularly relate to a kind of purifying method of Copper and its alloy liquid.
Background technology
Induction melting (containing core induction melting and coreless induction melting) is the most popular melting method of melting Copper and its alloy, and shaft furnace melting is the basic skills of continuous casting and rolling Copper and its alloy.These two kinds of Copper and its alloy melting method, in production, in operating process, do not remove the gred to copper liquid, degassed purifying treatment." Zhong Weijia, Ma Keding, Wu Weizhi, copper processing techniques application manual, metallurgical industry press " P279 introduces, and melting Copper and its alloy carries out in various induction furnace, does not substantially take slag removal and purification technique, relies on and selects high-quality feedstocks to ensure quality product; P17 introduces, and shaft furnace is a kind of continuous smelting furnace fast, does not have scavenging process.At present, only in reverberatory furnace during melting copper scap, just copper liquid to be purified, purifying treatment.
Directly utilizing copper scap as Copper fabrication raw material, is that Copper fabrication enterprise reduces production cost, the means improving product competitiveness and current way.And copper scap is often containing residues such as a certain amount of lime-ash, greasy dirt, oxide compound, incrustation scales.As, the inwall of metallurgical furnace kiln copper water jacket, water-cooled cable, is all attached with incrustation scale; The inwall of power plant and desalimtor's prolong is attached with ferric sulfate and all kinds of salt; Cupric electrolysis electroplating system electricity consumption bar inside pipe wall, current conducting rod and busbar surface attachment have copper sulfate; Nickel electrowinning electroplating system electricity consumption bar inside pipe wall, current conducting rod and busbar surface attachment have single nickel salt, nickelous chloride; The processing waste material returned in factory is often containing moisture, greasy dirt, emulsion; The composition brass surface of long-term air storage also has patina etc.Even electrolytic copper is also containing the oxygen of 70-700PPm, the hydrogen of 12-47PPm.The dirt settling such as the hydrogen-oxygen in raw material, moisture, greasy dirt, incrustation scale, patina, in Copper and its alloy melting process, meeting and copper liquid generation chemical reaction, the oxide compound of generation and gas inclusions, pollute copper melts.
Modern Copper fabrication enterprise, in smelting red copper, copper-nickel alloy, bronze and middle low brass process, does not remove the gred to copper liquid, degassed process, only in melting Mock platina process, utilizes zinc to seethe with excitement, evaporates, flame, removes the gas in aluminium alloy.Gas in copper liquid, makes ingot casting produce bubble, makes fabricated product produce peeling, layering and hydrogen embrittlement.Slag inclusion in Copper and its alloy destroys the continuity of matrix metal, affects Drawing abillity, the mechanics of goods and use properties.When adopting flame smelting technique melting Mock platina and complex brass, cause a large amount of metallic zinc oxidations, volatilization, loss." 2011104225918; " a kind for the treatment of process of copper scap " " although in propose a kind of brass alloys exempt from flame smelting technique, but this technology only can reduce flame, the combustion loss of Mock platina, do not provide the purification flux, the insulating covering agent that are suitable for red copper, copper-nickel alloy, bronze, and effective slagging-off, degas method.
Have core induction melting furnace channel size very narrow (the channel cross dimensions of the 1000kw inductor of ABB AB's design is also only 75mm ﹡ 245mm), the section form of channel and size directly affect electrothermal efficiency and the melting efficiency of smelting furnace.When the section form of channel and size occur significantly change or blocking occurs, smelting furnace cannot normally work, and need blowing out to change channel.Refractorily lined thickness between line-frequency induction smelting furnace channel and the coil of wire directly affects the electromagnetic efficiency of smelting furnace, and general thickness is 50-100mm only.Channel furnace lining generation Eroded, to peel off, namely have runout, run the danger of copper, blast, need blowing out to change channel.The lining thickness of medium frequency induction melting furnace determines the electrothermal efficiency of smelting furnace, the lining thickness of general intermediate frequency furnace is between 80-120mm, when intermediate frequency furnace lining corrode, flake off into certain thickness time, namely have runout, run copper, blast danger, need blowing out tamped liner again.
The reaction of Copper and its alloy oxidative slagging can produce a large amount of basic oxide Cu
2o, CuO, FeO, intermediate oxide ZnO, Al
2o
3deng.And induction melting furnace generally adopts siliceous (SiO
2) pickling furnace lining, or High-Alumina (Al
2o
3) both sexes furnace lining, or magnesia (MgO) basic lining.The oxide slag that strong slag making reaction produces is easy to react with siliceous, High-Alumina furnace lining, or reacts with the acidity in magnesia furnace lining, neutral component, generates the salt slag making of low melting point.There is serious lining erosion, peel off, the lining life of smelting furnace is seriously reduced.The slag generated also is easy to block channel, disconnected ditch accident occurs, causes blowing out.
In sum, modern Copper fabrication enterprise use various source complicated, with the copper raw material worked copper goods of various pollutent.And existing flux and insulating covering agent are also easy to planar water, oxygen and carbon dioxide.These pollutents and adsorptive pollute copper liquid; The modern widely used induction melting furnace of Copper fabrication enterprise and shaft furnace, when operating and use, do not remove the gred to copper liquid, degassed process substantially.Only in melting Mock platina process, utilize zinc boiling, evaporation, flame, remove the gas in aluminium alloy, cause a large amount of metallic zinc oxidations, volatilization, loss; Existing Copper and its alloy flux, insulating covering agent, effectively can not protect copper material and copper liquid, even cause certain pollution to copper liquid.A large amount of use charcoal covering protection causes again vegetation and the forest reserves to destroy; Modern sense answers that smelting furnace furnace lining is thin, channel is narrow, and furnace lining material can react with acid, alkaline constituent in the metal oxide in copper liquid, flux and insulating covering agent, causes metal loss and furnace lining to degrade; Remove the main purpose that the impurity in copper liquid, slag inclusion and gas inclusions are the purifications of copper liquid, the High Purity (without slag, without gas, oxide-free) realizing alloy substrate is the prerequisite improving alloy over-all properties.Copper and its alloy fusion process need a kind of effectively, not to the melt protecting agent that copper liquid pollutes, need a kind of effective copper liquid purifying method.
Summary of the invention
The present invention is directed to the deficiency of above-mentioned prior art, propose a kind of purifying method of Copper and its alloy liquid.
The present invention is achieved by the following technical solutions:
A purifying method for Copper and its alloy liquid, is characterized in that described method steps comprises:
(1) with refining carrier gas for carrier is by oxygenant or oxidisability flux MnO
2, CuO, KMnO
4in one or more, pass in the copper liquid in smelting furnace, blow, duration of blast is 2-5 minute;
(2) after finishing blowing, leave standstill 10-15 minute, add aluminium or phosphorus as reductor;
(3) using argon gas as carrier gas, in copper liquid, purification deslagging agent is added.
A purifying method for Copper and its alloy liquid, is characterized in that described refining carrier gas is N
2, Ar, N
2+ Ar, N
2+ CO, Ar+CO, N
2one or more in+Ar+CO.
A purifying method for Copper and its alloy liquid, is characterized in that the composition of the purification deslagging agent in described step (3) comprises: sodium aluminum fluoride, aluminum fluoride, fluorite, calcium carbonate.
A purifying method for Copper and its alloy liquid, is characterized in that the composition of the purification deslagging agent in described step (3) comprises: sodium aluminum fluoride, aluminum fluoride, fluorite, Sodium Fluoride.
A purifying method for Copper and its alloy liquid, is characterized in that the composition of the purification deslagging agent in described step (3) comprises: fluorite, borax, calcium carbonate, quartzite.
Advantageous Effects of the present invention: the purifying method that the invention provides a kind of Copper and its alloy liquid, existing various copper raw material can be utilized, purifying treatment is carried out in existing power frequency, medium frequency induction melting furnace or shaft furnace, pure, high-quality copper liquid can be obtained, improve the quality of products and raw material added value.And in treating processes, do not have a negative impact to the life-span of existing installation furnace lining, have processing efficiency high, quality product is high, the advantage that processing cost is cheap.
Embodiment
A purifying method for Copper and its alloy liquid, step comprises:
(1) in existing line-frequency induction smelting furnace or medium frequency induction melting furnace or shaft furnace, with refining carrier gas (N
2, Ar, N
2+ Ar, N
2+ CO, Ar+CO, N
2one or more in+Ar+CO) for carrier is by oxygenant (O
2deng) or oxidisability flux (MnO
2, CuO, KMnO
4in one or more) pass in smelting furnace copper liquid, blow, duration of blast is 2-5 minute;
This step is chemical deaeration process, the complexing hydrogen in copper alloy liquid and be partly dissolved hydrogen and removed by chemical reaction process.Oxygenant is added (as O in copper liquid
2) or oxidisability flux (as MnO
2, CuO, KMnO
4), generate Red copper oxide, nickel protoxide by oxygen and copper, nickel reactant, by Red copper oxide, nickel protoxide respectively with the complexing H-H reaction in copper, nickel, remove complexing hydrogen, or with the dissolved hydrogen generation reduction reaction in copper, nickel, remove and be partly dissolved hydrogen:
The O added
2, CuO, MnO
2, KMnO
4decomposite oxygen (2CuO → [Cu
2o]+[O], MnO
2→ [MnO]+[O], KMnO
4→ K
2o+MnO
2+ 2 [O]), by oxygen cupric oxide, nickel (2Cu+ [O] → [Cu
2o], Ni+ [O] → [NiO]) generate Red copper oxide and nickel protoxide, then remove complexing hydrogen by Red copper oxide, nickel protoxide and be partly dissolved hydrogen.Dehydrogenation reaction can be expressed as:
y[Cu
2O]+2yCu
xH
y→(2y+2xy)Cu+yH
2O↑
y[NiO]+2Ni
xH
y→（2x+y）Ni+ yH
2O↑
[Cu
2O]+2[H]→Cu+H
2O↑
[NiO]+2[H]→[Ni]+ H
2O↑
Dissolved hydrogen in molten metal removes mainly through concentration difference-pressure reduction diffusion process.The gas participating in diffusion dehydrogenation has two classes, and a class is the refining carrier gas passed into, the another kind of CO being gas making reaction and generating
2, SiF
4, AlF
3, N
2o
3, N
2, the gas such as CO.Two class gases are all distributed in copper liquid with the bubble form of disperse, and owing to starting do not have hydrogen in bubble, the hydrogen dividing potential drop in bubble is zero, and the hydrogen dividing potential drop in copper liquid is far longer than zero, there is the pressure reduction of hydrogen dividing potential drop inside and outside bubble.Hydrogen in copper liquid, under the effect of hydrogen dividing potential drop, to bubble interfacial diffusion, and is complex as molecular hydrogen and enters bubble on interface.This process to be continued until inside and outside bubble that hydrogen dividing potential drop is equal and just can to stop.The hydrogen entering bubble is overflowed from copper liquid with bubble, enters air, realizes certain embodiments.Gas making reaction process is carried out in whole copper liquid, and the gas generated has that bubble volume is tiny, the feature of bubble distribution disperse, the diffusion dehydrogenation better effects if of this kind of bubble, and certain embodiments more fully, thoroughly.
Oxide inclusion in molten metal is that dissolved hydrogen assembles the ideal place of forming core, dissolved hydrogen at oxide inclusion surface forming core, be polymerized, grow up into small bubbles, bubble hydrogen parasitizes in copper liquid with inclusion.Pass into gas, flux that the carrier gas in copper liquid, flux and gas making reaction generate, be distributed in copper liquid with the form of fine bubble, drop and liquid film, because bubble, drop and the interfacial tension between liquid film and oxide inclusion are little, can soak oxide inclusion surface well, oxide inclusion is separated by bubble, drop and liquid film from molten metal.The bubble parasitizing inclusion surface, at the effect float downward of density difference, removes by flux drop from molten metal.Flux liquid film and bubble can automatic absorbing oxide inclusions, by the metallurgy principle of absorption-flotation, removed by the bubble parasitizing inclusion surface from molten metal.
Certain embodiments, mainly through oxidisability flux and complexing H-H reaction, generates water vapour and discharges from copper liquid; Pass into the gas that carrier gas in copper liquid and gas making reaction generate, be distributed in copper liquid with the form of micro bubble, inside and outside bubble hydrogen partial pressure difference effect under, the hydrogen in copper liquid is under the effect of concentration difference-pressure reduction, spread-be combined into molecular hydrogen by bubble surface and enter bubble, discharge from copper liquid with bubble; Parasitize the bubble on oxide inclusion surface, under the adsorption of flux drop, liquid film, bubble, removed from molten metal by the metallurgy principle of absorption-flotation.By the diffusion under chemical reaction dehydrogenation, concentration difference-differential pressure action-polymerization dehydrogenation, absorption-flotation metallurgy principle dehydrogenation, by the dissolved hydrogen in molten metal, complexing hydrogen and the bubble hydrogen parasitizing inclusion surface, remove from molten metal.
(2), after finishing blowing, leave standstill 10-15 minute, add reductor, preferred aluminium or phosphorus;
The Red copper oxide of this step for reducing, reclaiming in copper liquid.
(3) using argon gas as carrier gas, in copper liquid, purification deslagging agent is added.
This step removes the gred for the purification of copper liquid.
The composition of purification deslagging agent comprises: sodium aluminum fluoride, aluminum fluoride, fluorite, calcium carbonate; Or sodium aluminum fluoride, aluminum fluoride, fluorite, Sodium Fluoride; Or fluorite, borax, calcium carbonate, quartzite.
Embodiment 1
With the copper raw material that exceeds standard that Pb content is 0.30%, melting HNi65-5 brass alloys.
In line-frequency induction smelting furnace, by the copper raw material of Pb content overproof, the Cu being 65% according to mass percent puts into main frequency furnace and melts, temperature of fusion 1150-1180 DEG C.Treat that copper material melts, with nitrogen as carrier, 8% O
2as oxygenant, in copper liquid, pass into oxygen, lead to when oxygen blows it should be noted that limit, to angle, do not stay blowing dead band, blind area, duration of blast was advisable with 3-5 minute.Converting process terminates, and alloy melt is left standstill 10-15 minute, makes the Red copper oxide in copper liquid and Pb that oxidizing reaction occur, and generates plumbous oxide.Oxygen in sampling analysis alloy and lead content, treat that lead content meets the requirement of HNi65-5 alloying ingredient, then according to analytical results, in copper liquid, add Al as reductor, reduction, the Red copper oxide reclaimed in copper liquid.Do carrier gas with argon gas, using the mixture of sodium aluminum fluoride, aluminum fluoride, fluorite, calcium carbonate as purification deslagging agent, purification removes plumbous oxide, aluminum oxide slag.Sampling analysis, treat that lead in copper liquid, aluminium, oxygen level reach the requirement of HNi65-5 alloying ingredient, copper liquid temperature is adjusted to 1130-1180 DEG C, the nickel that mass percent is 5.5% is added in copper liquid, treat that metallic nickel fusing terminates, in the copper-nickel alloy liquid of fusing, add the Zn that mass percent is 32 %, after copper, nickel, the complete alloying of zinc, according to processing requirement, carry out purifying, except Slag treatment.
Sampling analysis, after alloying constituent conformance with standard requires, by the temperature adjustment of copper liquid to casting temp 1070-1100 DEG C, comes out of the stove.
Copper alloy composition prepared is in this way (mass percent): the Cu of 66.5%, the nickel of 6.3%, the Pb of 0.013%, surplus is zinc.
Embodiment 2
With the copper raw material that exceeds standard that Al content is 0.15%, melting QSn6.5-0.1 bell metal.
In line-frequency induction smelting furnace, by the copper raw material of Al content overproof, the Cu being 93.5% according to mass percent puts into main frequency furnace and melts, temperature of fusion 1150-1180 DEG C.Treat that copper material melts, with argon gas as carrier, 9% O
2as oxygenant, in copper liquid, pass into oxygen, duration of blast was advisable with 2-5 minute.Converting process terminates, and alloy melt is left standstill 10-15 minute, makes the Red copper oxide in copper liquid and Al that oxidizing reaction occur, and generates aluminum oxide.Oxygen in sampling analysis alloy and aluminium content, treat that aluminium content meets the requirement of QSn6.5-0.1 bell metal.Again according to analytical results, in copper liquid, add the phosphorus of 0.1% as reductor, reduction, the Red copper oxide reclaimed in copper liquid.Do carrier gas with argon gas, using the mixture of sodium aluminum fluoride, aluminum fluoride, fluorite, Sodium Fluoride as purification deslagging agent, purification removes aluminum oxide slag.Sampling analysis, treat aluminium in copper liquid, oxygen level reaches the requirement of QSn6.5-0.1 alloying ingredient, copper liquid temperature is adjusted to 1180-1230 DEG C, in copper liquid, add the nickel that mass percent is 0.15%, treat that metallic nickel fusing terminates, in copper liquid, add the zinc of 0.25%, the tin of 6.5%, the phosphorus that mass percent is 0.20 % is added in copper-tin alloy liquid subsequently to fusing, after copper, tin, nickel, zinc, the complete alloying of phosphorus, according to processing requirement, carry out purifying, except Slag treatment.
Sampling analysis, after alloying constituent conformance with standard requires, by the temperature adjustment of copper liquid to casting temp 1180-1230 DEG C, comes out of the stove.
Copper alloy composition prepared is in this way (mass percent): the Sn of 6.53%, the P of 0.23%, the Ni of 0.18%, the Zn of 0.26%, the Fe of 0.04%, the Pb of 0.01%, the Al of 0.001%, surplus is copper.
Embodiment 3
With the copper raw material that exceeds standard that Fe content is 0.35%, melting H65 brass alloys.
In line-frequency induction smelting furnace, by the copper raw material of Fe content overproof, the Cu being 65% according to mass percent puts into main frequency furnace and melts, temperature of fusion 1150-1180 DEG C.Treat that copper material melts, in copper liquid, evenly add CuO, add-on is 0.10%, with nitrogen as carrier gas, in copper liquid, passes into nitrogen, and the Red copper oxide of generation is spread rapidly in copper liquid, and duration of blast was advisable with 2-4 minute.Converting process terminates, and alloy melt is left standstill 10-15 minute, makes the Red copper oxide in copper liquid and Fe that oxidizing reaction occur, and generates ferric oxide.Oxygen in sampling analysis alloy and iron level, treat that iron level meets the requirement of H65 brass alloys.Again according to analytical results, in copper liquid, add the phosphorus of 0.1% as reductor, reduction, the Red copper oxide reclaimed in copper liquid.Carrier gas is done with argon gas, using the mixture of fluorite, borax, calcium carbonate, quartzite as purification deslagging agent, purification slagging-off.Sampling analysis, treat Fe in copper liquid, oxygen level reaches the requirement of H65 alloying ingredient, copper liquid temperature is adjusted to 1150-1180 DEG C, the nickel that mass percent is 0.45% is added in copper liquid, treat that metallic nickel fusing terminates, in copper liquid, add the zinc of 35%, after copper, nickel, the complete alloying of zinc, according to processing requirement, carry out purifying, except Slag treatment.
Sampling analysis, after alloying constituent conformance with standard requires, by the temperature adjustment of copper liquid to casting temp 1040-1060 DEG C, comes out of the stove.
Copper alloy composition prepared is in this way (mass percent): the Cu of 64.9%, the Ni of 0.48%, the Fe of 0.06%, the Pb of 0.011%, surplus is zinc.
Embodiment 4
With the copper raw material that exceeds standard that Fe content is 0.35%, melting H65 brass alloys.
In line-frequency induction smelting furnace, by the copper raw material of Fe content overproof, the Cu being 65% according to mass percent puts into main frequency furnace and melts, temperature of fusion 1150-1180 DEG C.Treat that copper material melts, in copper liquid, evenly add KMnO
4add-on is 0.10%, with argon Ar as agitated medium, in copper liquid, passes into argon gas, and the Red copper oxide of generation is spread rapidly in copper liquid, and duration of blast was advisable with 2-4 minute.Converting process terminates, and alloy melt is left standstill 10-15 minute, makes the Red copper oxide in copper liquid and Fe that oxidizing reaction occur, and generates ferric oxide.Oxygen in sampling analysis alloy and iron level, treat that iron level meets the requirement of H65 brass alloys.Again according to analytical results, in copper liquid, add the phosphorus of 0.1% as reductor, reduction, the Red copper oxide reclaimed in copper liquid.Carrier gas is done with argon gas, using the mixture of fluorite, borax, calcium carbonate, quartzite as purification deslagging agent, purification slagging-off.Sampling analysis, treat Fe in copper liquid, oxygen level reaches the requirement of H65 alloying ingredient, copper liquid temperature is adjusted to 1150-1180 DEG C, the nickel that mass percent is 0.45% is added in copper liquid, treat that metallic nickel fusing terminates, in copper liquid, add the zinc of 35%, after copper, nickel, the complete alloying of zinc, according to processing requirement, carry out purifying, except Slag treatment.
Sampling analysis, after alloying constituent conformance with standard requires, by the temperature adjustment of copper liquid to casting temp 1040-1060 DEG C, comes out of the stove.
Copper alloy composition prepared is in this way (mass percent): the Cu of 64.9%, the Ni of 0.48%, the Fe of 0.06%, the Pb of 0.011%, surplus is zinc.
Embodiment 5
With the copper raw material that exceeds standard that Fe content is 0.35%, melting H65 brass alloys.
In line-frequency induction smelting furnace, by the copper raw material of Fe content overproof, the Cu being 65% according to mass percent puts into main frequency furnace and melts, temperature of fusion 1150-1180 DEG C.Treat that copper material melts, use N
2+ CO, as carrier gas, evenly adds MnO in copper liquid
2add-on is 0.10%, and the Red copper oxide of generation is spread rapidly in copper liquid, and duration of blast was advisable with 4 minutes.Converting process terminates, and alloy melt is left standstill 15 minutes, makes the Red copper oxide in copper liquid and Fe that oxidizing reaction occur, and generates ferric oxide.Oxygen in sampling analysis alloy and iron level, treat that iron level meets the requirement of H65 brass alloys.Again according to analytical results, in copper liquid, add the phosphorus of 0.1% as reductor, reduction, the Red copper oxide reclaimed in copper liquid.Carrier gas is done with argon gas, using the mixture of fluorite, borax, calcium carbonate, quartzite as purification deslagging agent, purification slagging-off.Sampling analysis, treat Fe in copper liquid, oxygen level reaches the requirement of H65 alloying ingredient, copper liquid temperature is adjusted to 1150-1180 DEG C, the nickel that mass percent is 0.45% is added in copper liquid, treat that metallic nickel fusing terminates, in copper liquid, add the zinc of 35%, after copper, nickel, the complete alloying of zinc, according to processing requirement, carry out purifying, except Slag treatment.
Sampling analysis, after alloying constituent conformance with standard requires, by the temperature adjustment of copper liquid to casting temp 1040-1060 DEG C, comes out of the stove.
Copper alloy composition prepared is in this way (mass percent): the Cu of 64.9%, the Ni of 0.48%, the Fe of 0.06%, the Pb of 0.011%, surplus is zinc.
Embodiment 6
With the copper raw material that exceeds standard that Fe content is 0.35%, melting H65 brass alloys.
In line-frequency induction smelting furnace, by the copper raw material of Fe content overproof, the Cu being 65% according to mass percent puts into main frequency furnace and melts, temperature of fusion 1150-1180 DEG C.Treat that copper material melts, with Ar+CO as carrier gas, in copper liquid, evenly add MnO
2add-on is 0.10%, and the Red copper oxide of generation is spread rapidly in copper liquid, and duration of blast was advisable with 2 minutes.Converting process terminates, and alloy melt is left standstill 10 minutes, makes the Red copper oxide in copper liquid and Fe that oxidizing reaction occur, and generates ferric oxide.Oxygen in sampling analysis alloy and iron level, treat that iron level meets the requirement of H65 brass alloys.Again according to analytical results, in copper liquid, add the phosphorus of 0.1% as reductor, reduction, the Red copper oxide reclaimed in copper liquid.Carrier gas is done with argon gas, using the mixture of fluorite, borax, calcium carbonate, quartzite as purification deslagging agent, purification slagging-off.Sampling analysis, treat Fe in copper liquid, oxygen level reaches the requirement of H65 alloying ingredient, copper liquid temperature is adjusted to 1150-1180 DEG C, the nickel that mass percent is 0.45% is added in copper liquid, treat that metallic nickel fusing terminates, in copper liquid, add the zinc of 35%, after copper, nickel, the complete alloying of zinc, according to processing requirement, carry out purifying, except Slag treatment.
Sampling analysis, after alloying constituent conformance with standard requires, by the temperature adjustment of copper liquid to casting temp 1040-1060 DEG C, comes out of the stove.
Copper alloy composition prepared is in this way (mass percent): the Cu of 64.9%, the Ni of 0.48%, the Fe of 0.06%, the Pb of 0.011%, surplus is zinc.
Claims (5)
1. a purifying method for Copper and its alloy liquid, is characterized in that described method steps comprises:
(1) with refining carrier gas for carrier is by oxygenant or oxidisability flux MnO
2, CuO, KMnO
4in one or more, pass in the copper liquid in smelting furnace, blow, duration of blast is 2-5 minute;
(2) after finishing blowing, leave standstill 10-15 minute, add aluminium or phosphorus as reductor;
(3) using argon gas as carrier gas, in copper liquid, purification deslagging agent is added.
2. the purifying method of a kind of Copper and its alloy liquid according to claim 1, is characterized in that described refining carrier gas is N
2, Ar, N
2+ Ar, N
2+ CO, Ar+CO, N
2one or more in+Ar+CO.
3. the purifying method of a kind of Copper and its alloy liquid according to claim 1, is characterized in that the composition of the purification deslagging agent in described step (3) comprises: sodium aluminum fluoride, aluminum fluoride, fluorite, calcium carbonate.
4. the purifying method of a kind of Copper and its alloy liquid according to claim 1, is characterized in that the composition of the purification deslagging agent in described step (3) comprises: sodium aluminum fluoride, aluminum fluoride, fluorite, Sodium Fluoride.
5. the purifying method of a kind of Copper and its alloy liquid according to claim 1, is characterized in that the composition of the purification deslagging agent in described step (3) comprises: fluorite, borax, calcium carbonate, quartzite.
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| CN105803251A (en) * | 2016-04-29 | 2016-07-27 | 南京晨光艺术工程有限公司 | White copper alloy and preparation technique thereof |
| CN109385637A (en) * | 2017-08-09 | 2019-02-26 | 江西凯安智能股份有限公司 | A kind of brass producing process of sheet and strip |
| CN108034837A (en) * | 2017-11-28 | 2018-05-15 | 上海龙阳精密复合铜管有限公司 | A kind of quick production method for removing red copper stove liquid impurity |
| CN110616339A (en) * | 2019-10-28 | 2019-12-27 | 河南科技大学 | Method for deoxidizing copper or copper alloy, method for producing high-purity copper or copper alloy, and high-purity copper or copper alloy obtained by the method |
| CN110616339B (en) * | 2019-10-28 | 2022-04-01 | 河南科技大学 | Method for deoxidizing copper or copper alloy, method for producing high-purity copper or copper alloy, and high-purity copper or copper alloy obtained by the method |
| CN114000179A (en) * | 2021-11-08 | 2022-02-01 | 安徽有研吸气材料有限公司 | Easy-to-weld copper strip for vacuum device |
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