• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to the field of metallurgy, to methods for the purification of aluminum by the method of fractional crystallization. The purpose of the invention is to improve cleaning by separating the inter-nodal fluid. The aluminum melt to be cleaned is placed in a heated container and cooled using a submerged heat exchanger. The temperature of the melt is maintained close to the melting point. The formed aluminum crystals are compacted by pressing. The separated mother melt is removed by draining when the container is tilted. After the mother melt has been drained, the formed block of compacted crystals is tilted and held in this position for 5 minutes to 1 hour. At the same time, the block can be heated to compensate for heat losses and / or additional compaction. 3 hp f-ly, 1 tab.
    公开号:SU1732817A3
    申请号:SU874028797
    申请日:1987-01-05
    公开日:1992-05-07
    发明作者:Раймон-Серэй Андре
    申请人:Алюминиюм Пешинэ (Фирма)；
    IPC主号:
    专利说明:

    -
    fe
    The invention relates to metallurgy, in particular to methods for the purification of aluminum by the method of fractional crystallization.
    The aim of the invention is to improve cleaning by separating the inter-nodal fluid.
    The method of cleaning aluminum provides for the cooling of molten aluminum subjected to cleaning, immersion, heat exchanger in a heated vessel. The temperature of the melt is maintained close to the melting point by adjusting the flow rate of the refrigerant and the power of the heater.
    The crystals of pure aluminum formed are compacted by pressing and the mother melt is removed by discharge when the container is tilted.
    The block of condensed crystals obtained in this way is turned over and held in this position for 5 minutes to 1 hour.
    It has been established that in this position (and this must be emphasized) in the absence of all heating, the liquid leaked out very slowly and for a long time through the mass to be cleaned. The operation can last from about 5 minutes to 1 hour. The liquid that is drained is much less pure than the mass to be cleaned. The study after cooling the purified mass showed that it had a fine porosity, indicating that the fluid that leaks out is truly intercrystalline and that the fine porosity is mostly porous, communicating and open, which allows intercrystalline liquid
    AND
    No. 00
     GP
    get out of the quasi-compact purified mass.
    As the examples given below show, it is quite surprising that a simple drainage of the intercrystalline liquid is obtained by simple decanting without heating. Tilt decantation has the advantage of intercrystalline liquid withdrawal, starting from the most unpurified part and without passing it through the areas where the metal is most pure. This result would not have been obtained if such decantation was carried out without tilting, through the bottom of the metal receiver.
    On the other hand, it is also noted that the content of intercrystalline liquid in the mass to be purified increases from bottom to top, so that the slope of the metal reservoir is favorable for the quality removal of intercrystalline liquid.
    But the pumping operation is very slow and since there is no heat supply, the intercrystalline liquid fraction can solidify. Therefore, it is possible during the decanting operation to bring sufficient heat to the mass of crystals in an amount sufficient to compensate for heat losses. It is not intended to re-melt the mass to be cleaned, which would reduce the efficiency, but only prevent the intercrystalline liquid from solidifying and thus reducing the efficiency of the pumping operation.
    Such a supply of heat can be realized by any known means and in an intermittent or continuous manner. It is also possible to use a piston intended for compaction in order to exert pressure on the mass to be cleaned, which simplifies the ejection of intercrystalline liquid and this effect can also be provided continuously or intermittently.
    The heat input and the impact of the piston, made simultaneously, serve to further increase the efficiency of the method.
    PRI me R. In an aluminum bath, four fractions of 1 pct each were analyzed, having a similar composition, which were separately subjected to purification operations by the method of fractional crystallization in accordance with the following operational options.
    Option 1: according to the previously existing technology with a crystallization time of 8 hours.
    Option 2: according to the previously existing technology with a crystallization time of 16 hours and increased piston pressure.
    Option 3: in accordance with the technology used in test 1, and using decanting for 45 minutes, in accordance with the invention, without heat supply.
    Option 4: in accordance with the technology of option 3 and the supply of heat to compensate for heat losses and continuous pressure on the cleaned fraction during the entire period of decanting.
    These results are shown in the table, where the following notation is taken:
    Fe (0) - Si (0) - initial content in the bath, iron and silicon, ppm,
    Fe (1) and 51 (1) - the final average content of iron and silicon in the purified mass of metal;
    Fe and rjsi are the ratio of the initial contents to the final contents of iron and silicon;
    p is the mass ratio: mass of the purified metal / mass of the initial metal,%.
    It is noted that for iron, by simple decanting without heat supply (option 3), the concentration reaches 6 times lower than it was attained by the existing technology (option 1). Purification is less effective for silicon, but the concentration has nevertheless halved.
    With the compensation of heat losses and the effect of pressure (option 4), the results are even better, since again with respect to the previously existing level of technology (option 1), the iron concentration decreased by 13 times, and for silicon more than three times.
    The mass ratio / o decreases relatively little, since it goes from 64% for the existing level of technology to 59% with simple pumping and about 54% in option 4.
    It can be seen (from option 2) that doubling the hardening time does not give a significant improvement.
    In four tests, the operation ended with vessel cooling and sawing to eliminate the upper part of the clean mass of large crystals contaminated with residual liquid that was retained on the surface towards the end of the compaction operation, and the cleaned part was always sawn at the same height of the ingot.
    In options 3 and 4, a lower mass ratio is due to the elimination of inter-crystalline liquid, which leaves the porosity in the purified mass.
    Thus, the present invention represents a clear progress with respect to the prior art.
    权利要求:
    Claims (3)
    [1]
    Claim 1. A method for purifying aluminum by fractional crystallization, which includes cooling the melt, which is in a heated outside vessel, using a submerged heat exchanger while maintaining the melt temperature close to the melting point, by adjusting the coolant flow rate and heater power, sealing crystals formed by pressing into a block and separating the uterine melt from it by draining when the container is tilted, characterized in
    that, in order to improve cleaning by separating the inter-nodal liquid from the crystals, after separating the mother melt, the container with the block of compacted crystals is tilted and held in this position for 0.12-1.00 h.
    [2]
    2. A method according to claim 1, characterized in that, while holding the pack of sealed crystals in the upturned position, it is additionally heated.
    [3]
    3. The method according to claim 1, characterized in that, while holding the pack of sealed crystals in the upturned position, it is subjected to additional compaction.
    A. The method according to claim 1, characterized in that while holding the pack of compacted crystals in the upturned position, it is subjected to additional compaction with simultaneous heating.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1732817A3|1992-05-07|Method of purifying aluminum by fractional crystallization
    US4456480A|1984-06-26|Process for purifying metals by segregation
    JPS5966305A|1984-04-14|Counterflow type cooling and purifying method for molten substance
    US4221590A|1980-09-09|Fractional crystallization process
    RU1782247C|1992-12-15|Process for gallium purification
    US3897336A|1975-07-29|Method of regeneration of solder, particularly of tin-lead solders, and an apparatus for application the method
    Lux et al.1979|Refining by fractional solidification
    US4532090A|1985-07-30|Method and apparatus for the manufacture of high purity silicon granulate
    FR2422462A1|1979-11-09|METHOD AND APPARATUS FOR CASTING ABRASIVE PRODUCTS
    RU2139363C1|1999-10-10|Method and installation for refining lithium
    JPS58167733A|1983-10-04|Method of refining aluminum
    SU526443A1|1976-08-30|The method of processing the crystallizing metal
    RU3445U1|1997-01-16|DEVICE FOR REFINING LIGHT-MELTING SUBSTANCES
    JPS5920431A|1984-02-02|Method and device for refining aluminum
    RU2110595C1|1998-05-10|Device for removal of impurities from liquid metal lithium
    SU429878A1|1974-05-30|STEEL CASTING METHOD
    Dawless et al.1980|Fractional crystallization process
    US4366951A|1983-01-04|Apparatus for refining metal melts from insuluble impurities
    KR890700155A|1989-03-10|Method and apparatus for cooling high temperature coke and removing dust from high temperature coke
    JPS6456311A|1989-03-03|Production of high-purity silicon
    SU941018A1|1982-07-07|Vacuum apparatus for taking and pouring metal
    Iuchi et al.1988|Process and Apparatus for Refining Aluminum
    SU986939A1|1983-01-07|Method for refining steel and alloys
    JPH0770664A|1995-03-14|Method for refining and reusing al scrap
    SU703230A1|1979-12-25|Apparatus for refining and transporting metal melts
    同族专利:
    公开号 | 公开日
    AT56480T|1990-09-15|
    ES2017749B3|1991-03-01|
    CN1004425B|1989-06-07|
    EP0236238B1|1990-09-12|
    DE3764829D1|1990-10-18|
    SG49991G|1991-09-13|
    ZA8738B|1988-03-30|
    CA1287217C|1991-08-06|
    JPS62158830A|1987-07-14|
    JPH0322453B2|1991-03-26|
    AU580521B2|1989-01-12|
    US4744823A|1988-05-17|
    AU6691186A|1987-07-09|
    PH22854A|1989-01-19|
    DK1287A|1987-07-07|
    IL81129A|1989-12-15|
    NO172189C|1993-06-16|
    DK1287D0|1987-01-02|
    IN168687B|1991-05-18|
    IL81129D0|1987-03-31|
    KR870007291A|1987-08-18|
    EP0236238A1|1987-09-09|
    HK23692A|1992-04-10|
    DD253049A5|1988-01-06|
    FR2592663B1|1992-07-24|
    NZ218824A|1990-04-26|
    FR2592663A1|1987-07-10|
    KR900006697B1|1990-09-17|
    BR8700007A|1987-12-01|
    NO870024D0|1987-01-05|
    NO870024L|1987-07-07|
    CN87100033A|1987-07-22|
    NO172189B|1993-03-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3211547A|1961-02-10|1965-10-12|Aluminum Co Of America|Treatment of molten aluminum|
    US3543531A|1967-05-08|1970-12-01|Clyde C Adams|Freeze refining apparatus|
    FR1594154A|1968-12-06|1970-06-01|
    US4221590A|1978-12-26|1980-09-09|Aluminum Company Of America|Fractional crystallization process|
    FR2524489B1|1982-03-30|1984-05-25|Pechiney Aluminium|
    JPH022936B2|1982-10-27|1990-01-19|Kasei Naoetsu Kk|FR2633640B1|1988-07-01|1991-04-19|Pechiney Aluminium|
    CA2011086A1|1989-03-17|1990-09-17|Karl-Heinz Geiss|2-alkyl-4-arylmethylaminoquinolines, the use thereof and drugs prepared therefrom|
    JP2949512B2|1990-05-28|1999-09-13|昭和アルミニウム株式会社|Manufacturing method of aluminum material for electronic materials|
    NL1009031C2|1998-04-29|1999-11-01|Ir Cornelis Hendrik Jacques Va|Purifying non ferrous metals, e.g. for recycling waste metals|
    US6398845B1|2000-02-10|2002-06-04|Sumitomo Chemical Company, Limited|Method for purifying aluminum|
    AT270348T|2001-09-03|2004-07-15|Corus Technology Bv|METHOD FOR CLEANING AN ALUMINUM ALLOY|
    DE10145413A1|2001-09-14|2005-06-09|Focke Gmbh & Co. Kg|Method for identifying items and item with electronic data carrier|
    NL1019105C2|2001-10-03|2003-04-04|Corus Technology B V|Method and device for controlling the proportion of crystals in a liquid-crystal mixture.|
    EP1380659A1|2002-07-05|2004-01-14|Corus Technology BV|Method for fractional crystallisation of a metal|
    EP1380658A1|2002-07-05|2004-01-14|Corus Technology BV|Method for fractional crystallisation of a molten metal|
    NZ546693A|2003-11-19|2009-02-28|Aleris Switzerland Gmbh|Method of cooling molten metal during fractional crystallisation|
    JP5184075B2|2004-03-19|2013-04-17|アレリス、スウィッツァーランド、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング|Method for purifying molten metal|
    NL1029612C2|2005-07-26|2007-01-29|Corus Technology B V|Method for analyzing liquid metal and device for use therein.|
    WO2007147587A1|2006-06-22|2007-12-27|Aleris Switzerland Gmbh|Method for the separation of molten aluminium and solid inclusions|
    US7892318B2|2006-06-28|2011-02-22|Aleris Switzerland Gmbh C/O K+P Treuhandgesellschaft|Crystallisation method for the purification of a molten metal, in particular recycled aluminium|
    WO2008003505A1|2006-07-07|2008-01-10|Aleris Switzerland Gmbh|Method and device for metal purification and separation of purified metal from a metal mother liquid such as aluminium|
    CN102586623B|2012-03-16|2014-01-15|南南铝业股份有限公司|Extracting method and extracting device for high purity aluminum|
    RU2593881C1|2015-04-08|2016-08-10|федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" |Method of purifying technical aluminium|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8600399A|FR2592663B1|1986-01-06|1986-01-06|IMPROVED PROCESS FOR THE PURIFICATION OF METALS BY FRACTIONAL CRYSTALLIZATION|
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