CN102690963B - Flux used for recycling magnesium alloy cuttings, and preparation method and application method thereof - Google Patents
Flux used for recycling magnesium alloy cuttings, and preparation method and application method thereof Download PDFInfo
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- CN102690963B CN102690963B CN201210152276.2A CN201210152276A CN102690963B CN 102690963 B CN102690963 B CN 102690963B CN 201210152276 A CN201210152276 A CN 201210152276A CN 102690963 B CN102690963 B CN 102690963B
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Abstract
The invention discloses a flux used for recycling magnesium alloy cuttings, and a preparation method and application method of the flux, belonging to the technical field of magnesium alloy metallurgy. The flux mainly comprises anhydrous carnallite, magnesium chloride, potassium chloride, magnesium carbonate and calcium carbonate, the mass percentages of the components are respectively 10-80%, 0-40%, 5-40%, 0.5-3% and 0-2%, and not more than 40% of other components such as sodium chorlode, calcium chloride and the like can be added according to thickness of magnesium cuttings and a heating condition. According to the invention, before the magnesium cuttings enter into a furnace, the magnesium cuttings and the flux are fully mixed, and then are added into a smelting furnace, the flux is smelted and attached on the surface of the magnesium cuttings along with a temperature rise of the furnace, the contact of the surface of the magnesium with gas and oxidization of the surface can be blocked, meanwhile, oxidization and combustion of the magnesium cuttings can be effectively prevented by inflaming retarding gas generated by the flux, and the recovery rate and the production safety of the magnesium cuttings are improved.
Description
Technical field
The invention belongs to magnesium alloy metallurgical technology field, particularly a kind of for reclaiming flux and the methods for making and using same thereof of magnesium alloy smear metal.
Background technology
Magnesium alloy because low, the specific tenacity of density and the feature such as specific rigidity is high, damping vibration attenuation effect is good, machinability is good expand rapidly in the application in the fields such as Aeronautics and Astronautics, automobile, household electrical appliances and communication, and progressively become popular civil use material.Magnesium alloy can produce a large amount of useless smear metals (magnesium chips) in machining process, and traditional magnesium chips recovery method, is that magnesium chips is directly added to remelting in smelting furnace, in the time of remelting refining, because magnesium chips is active large, a large amount of thin magnesium chips oxidizing fires, produce a large amount of scaling loss and waste residue and obnoxious flavour
Although spread flux while adopting magnesium chips briquetting, remelting, use the measures such as fire-retardant gas shield can improve scrap combustion case, actual Use Limitation fruit is not good, and while causing magnesium chips to reclaim, the rate of recovery is low, lacks security and economy.
Summary of the invention
For above-mentioned deficiency, the invention provides a kind of for reclaiming flux and the methods for making and using same thereof of magnesium alloy smear metal, this flux be used for preventing magnesium chips reclaim time produce burning.The present invention enters stokehold at magnesium chips, by fully mixed to magnesium chips and flux, then add in smelting furnace, heat up with stove, flux melts is attached to the surface of magnesium chips, intercepts the catalytic oxidation of magnesium surface and gas, the fire-retardant gas that flux produces simultaneously, further effectively prevent magnesium chips oxidizing fire, improve the rate of recovery and the production security of magnesium chips.
A kind of for reclaiming the flux of magnesium alloy smear metal, this flux is mainly made up of anhydrous carnallite, magnesium chloride, Repone K, magnesiumcarbonate and calcium carbonate, the shared mass percent of above-mentioned each composition is respectively 10-80%, 0-40%, 5-40%, 0.5-3%, 0-2%, according to the specific requirement of magnesium chips thickness and heating condition, also can add other composition such as sodium-chlor, calcium chloride of massfraction no more than 40%, for adjusting fusing point, viscosity and the surface tension of flux.
Above-mentioned for reclaiming the preparation method of flux of magnesium alloy smear metal, the method is above-mentioned each composition is mixed with powder form in described ratio or grind and fully stir, and several compositions are mixed completely, obtains flux.
Above-mentioned for reclaiming the application method of flux of magnesium alloy smear metal, the method is as follows: before magnesium chips drops into smelting furnace, magnesium chips is mixed with the flux that accounts for its weight no more than 20%, directly joined in smelting furnace and melt, and carry out Melting Magnesium alloy melting subsequently.The ratio that described flux accounts for magnesium chips weight is preferably 0.2-5%.
Beneficial effect of the present invention is: flux of the present invention, after mixing with magnesium chips, is attached to the surface of magnesium chips substantially, melts, and raise with temperature in the process heating with magnesium chips prior to magnesium chips, produces fire-retardant gas.Due to suitable viscosity and the surface tension of flux of fusing, before Heating temperature not yet arrives magnesium chips to start that vigorous oxidation temperature occurs until the fusing of magnesium chips only, fusing flux covers magnesium chips surface all the time, and simultaneously fire-retardant gas is filled the space between magnesium chips, effectively prevents the oxidizing fire of magnesium chips.After magnesium chips fusing, flux floats to the surface of magnesium liquid, plays the effect of conventional flux melting.So greatly improve the rate of recovery of magnesium chips, make the danger of burning and blast greatly reduce simultaneously, reclaim security and be improved.
Use this flux easy to operate, before reclaiming, increase flux and magnesium chips mixed processes, can adopt traditional recovery magnesium chips technique.The contained basal component of this flux is also the moiety of conventional smelting fusing agent, can not affect the Smelting Effect of magnesium alloy.
Embodiment
Embodiment 1
The chief component of flux and massfraction thereof are: 10% anhydrous carnallite, 40% magnesium chloride, 40% Repone K, 3% magnesiumcarbonate, 7% calcium chloride.Above-mentioned each composition is mixed with powder form in described ratio, several compositions are mixed completely, obtain flux.
Application method is as follows: 2Kg flux is mixed with the smear metal of 200Kg magnesium-manganese alloy sacrificial anode, then drop in 1.5 tons of smelting furnaces that are heated to 985-1020K and heat up with stove, after smear metal fusing, add former magnesium ingot to furnace capacity, by normal process refining and alloying, then D.C.casting magnesium-manganese alloy ingot.The magnesium-manganese alloy ingot of preparing is made magnesium-manganese alloy sacrificial anode after normal process hot extrusion.After weighing measurement, calculate the magnesium chips rate of recovery and reach 92%, prepare the performance such as current efficiency and open circuit potential of sacrificial anode in table 1, all meet sacrificial anode requirement, reach the effect same with using brand-new magnesium ingot.
Table 1 magnesium manganese Performance of Sacrificial Anode Using
| Index | Current efficiency/% | Open circuit potential/V |
| Partially recycled magnesium chips anode | 52 | 1.74 |
| Use brand-new magnesium ingot anode | 53 | 1.73 |
| Standard-required | >50 | 1.70-1.75 |
Embodiment 2
The main component of flux and massfraction thereof are: 80% anhydrous carnallite, 5% Repone K, 0.5% magnesiumcarbonate, 2% calcium carbonate, 10% sodium-chlor, 2.5% calcium chloride.Above-mentioned each composition is ground and fully stirred in described ratio, several compositions are mixed completely, obtain flux.
Application method is as follows: 1.5Kg flux is mixed with the smear metal of 200Kg AZ91D magnesium alloy, then drop into the capacity that is heated to 973-993K and be in the smelting furnace of 1.5 tons, after smear metal fusing, add magnesium ingot raw material to furnace capacity, carry out refining and alloying by normal process, then pour into magnesium alloy parts.Know that through instrumentation the magnesium chips rate of recovery reaches 93%, obtain part mechanical property and reach AZ91D magnesium alloy standard-required, as table 2.
Table 2 reclaims the AD91D alloy property of magnesium chips
| Index | Tensile strength/Mpa | Yield strength/Mpa | Unit elongation/% |
| Part performance | 255 | 162 | 7.5 |
| Standard-required | 250 | 160 | 7 |
Embodiment 3
The composition of flux and massfraction thereof are: 50% anhydrous carnallite, 3% calcium chloride, 10% magnesium chloride, 20% Repone K, 1.5% magnesiumcarbonate, 0.5% calcium carbonate, 15% sodium-chlor.Above-mentioned each composition is mixed with powder form in described ratio, several compositions are mixed completely, obtain flux.
Application method is as follows: 6Kg flux is mixed all with the smear metal of 200Kg magnesium-manganese alloy sacrificial anode, then drop in 1.5 tons of smelting furnaces that are heated to 773-873K and heat up with stove, after smear metal fusing, add magnesium ingot raw material to furnace capacity, carry out the subsequent techniques such as refining and alloying and make magnesium-manganese alloy ingot.
Claims (3)
1. for reclaiming the application method of flux for magnesium alloy smear metal, it is characterized in that: the composition of described flux and massfraction thereof are: 10% anhydrous carnallite, 40% magnesium chloride, 40% Repone K, 3% magnesiumcarbonate, 7% calcium chloride;
Described application method is before magnesium chips drops into smelting furnace, and magnesium chips is mixed with the flux that accounts for its weight no more than 20%, is directly joined in smelting furnace and melts, and carry out magnesium alloy smelting subsequently;
Described magnesium chips is magnesium-manganese alloy smear metal.
2. for reclaiming the application method of flux for magnesium alloy smear metal, it is characterized in that: the composition of described flux and massfraction thereof are: 80% anhydrous carnallite, 5% Repone K, 0.5% magnesiumcarbonate, 2% calcium carbonate, 10% sodium-chlor, 2.5% calcium chloride;
Described application method is before magnesium chips drops into smelting furnace, and magnesium chips is mixed with the flux that accounts for its weight no more than 20%, is directly joined in smelting furnace and melts, and carry out magnesium alloy smelting subsequently;
Described magnesium chips is magnesium alloy smear metal.
3. application method according to claim 1 and 2, is characterized in that: the ratio that described flux accounts for magnesium chips weight is 0.2-5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210152276.2A CN102690963B (en) | 2012-05-16 | 2012-05-16 | Flux used for recycling magnesium alloy cuttings, and preparation method and application method thereof |
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| CN201210152276.2A CN102690963B (en) | 2012-05-16 | 2012-05-16 | Flux used for recycling magnesium alloy cuttings, and preparation method and application method thereof |
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| CN102690963A CN102690963A (en) | 2012-09-26 |
| CN102690963B true CN102690963B (en) | 2014-12-10 |
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| RU2557608C1 (en) * | 2014-04-03 | 2015-07-27 | Федеральное государственное бюджетное учреждение науки Институт химии Дальневосточного отделения Российской академии наук (ИХ ДВО РАН) | Method of recycling spent chrome plating electrolytes |
| CN105349816B (en) * | 2015-11-30 | 2017-12-01 | 贵州航天风华精密设备有限公司 | A kind of protection solvent of magnesium alloy smelting and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288967A (en) * | 2000-09-21 | 2001-03-28 | 上海交通大学 | Foamed magnesium alloy covering agent |
| CN1465733A (en) * | 2002-06-29 | 2004-01-07 | 包头文鑫实业有限公司 | Process for making core agent and core yarn of high magnesium alloy core-spun yarn |
| CN101376933A (en) * | 2008-09-11 | 2009-03-04 | 河南科技大学 | Flux for smelting rare-earth-contained magnesium alloy and production method thereof |
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2012
- 2012-05-16 CN CN201210152276.2A patent/CN102690963B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288967A (en) * | 2000-09-21 | 2001-03-28 | 上海交通大学 | Foamed magnesium alloy covering agent |
| CN1465733A (en) * | 2002-06-29 | 2004-01-07 | 包头文鑫实业有限公司 | Process for making core agent and core yarn of high magnesium alloy core-spun yarn |
| CN101376933A (en) * | 2008-09-11 | 2009-03-04 | 河南科技大学 | Flux for smelting rare-earth-contained magnesium alloy and production method thereof |
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Effective date of registration: 20190312 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |
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Effective date of registration: 20210826 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Youyan metal composite technology Co.,Ltd. Address before: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee before: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
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