• 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:
    A method of cooling molten glass, which comprises slowly cooling the molten glass while the average temperature of the molten glass is within a certain range extending below and above the temperature at which the speed of absorbing bubbles is highest, and cooling it rapidly when the average temperature of the molten glass is outside said range.
    公开号:SU1558300A3
    申请号:SU853920682
    申请日:1985-07-01
    公开日:1990-04-15
    发明作者:Самедзима Хироси；Манабе Сейитиро；Хосино Акира
    申请人:Ниппон Шит Гласс Ко, Лтд (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a process for boiling soda lime silicate glass.
    The purpose of the invention is to improve the quality of glass melt.
    FIG. 1 shows a glass furnace, top view; in fig. 2 - the same, vertical section; in fig. 3 is a section A-A in FIG. 2; in fig. 4 shows the curve of the change in the number of bubbles during the cooling stage when the cooling rate is selected as a parameter; in fig. 5 is a graph of the relationship between temperature and the rate of decrease in the number of bubbles when the rate of slow cooling is 2 C / min.
    The temperature at which the highest absorption rate is observed
    bubbles in the glass melt is about 1390 ° C. The melted glass is cooled slowly in the temperature range 1390 + 20% when the rate of bubble absorption by the glass melt is greatest. When the glass mass is outside the specified range, it is rapidly cooled. Slow cooling is carried out at a rate of 1-2 C / min. Rapid cooling before and after an interval of 1410-1370 ° C is carried out in the intervals: clarification temperature of 1410 ° C and 1370 C forming temperature, respectively, at speeds of 3-8 and 3-12 C / min . A glass melting furnace 1 contains a pool 2 with a loader 3 for a portion of the charge. There are 4 regenerators on both sides of the basin 2, and each of the regenerators is connected
    SL
    to the pool by means of a plurality of burners 5. Flames of flame are supplied to the charge through burners 5. At the same time, the charge is melted and the molten glass 6 is collected in the pool. The molten glass is heated at a temperature of at least 1500 ° C for more than 30 minutes and flows into the cooling basin 7 while it is at a temperature of 1500 to 1550 ° C
    | The cooling basin 7 is smaller in width by 40-60% relative to the melting basin 2, and its depth
     it is from 0.2 to 0.4 m. Its dimensions are smaller than that of a conventional furnace. The amount of glass melt contained in it is 1 / 5-1 / 6 in a conventional cooling basin. The interior of the cooling basin 7 is divided into three zones 7a, 7b and 7c. One end of the cooling basin 7 is connected to the melting basin 2, and a working window 8 is formed at the other end. The recess 9 is located between zones 7a, 7b and 7c.
    Zones 7a and 7c are zones of forced cooling, and zone 7b is a zone of spontaneous cooling. Accordingly, the molten glass is rapidly cooled in zones 7a and 7c and slowly cooled in zone 7b. As a means of forced cooling, zones 7a and 7c are made up of a series of radiating cooling devices 10 that are in the roof. Each of the radiator cooling devices 10 blows air into the cooling basin 7.
    The temperature of molten silicate-based soda lime glass is preferably set, for example, initially at a level of 14X9C in zone 7a, at a level of 14X-1370 ° C 3 zone 7b and at least less than 1370 ° C in zone 7c. Preferably, the cooling rate is at least 3 ° С / min in zone 7а, not more than 2 ° С / min
    in zone 7b and at least 3 C / min
    in zone 7a, no more than 2 ° C / min in zone 7b and at least 3 ° C / min in zone 7c.
    FIG. Figure 4 shows the changes in the number of bubbles in the glass at different cooling rates, with the ordinate showing the number of remaining bubbles in relative units. FIG. 4 shows the cooling rate.
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    It is 2 ° C / min for curve a, .3 ° C / min for curve b, 4 ° C / min for curve c and 6 ° C / min for curve d. FIG. Figure 5 shows the relationship between temperature and rate of decrease in the number of bubbles. FIG. 5, the rate of slow cooling is 2 C / min. The glass used to obtain these characteristics is soda lime silicate glass and has a composition, wt%: Si04 71; A1A03 1.69; MgO 3.92; Fe20, 0.07; CaO 8.76; 13.45; K20 0.82; S05 0.29.
    As can be seen from FIG. 4 and 5, the bubble absorption rate becomes the highest in the temperature range of about 1390 ° C. If the molten glass is cooled slowly at a cooling rate of no more than 2 C / min within this temperature range, the effectiveness of reducing the number of bubbles becomes the highest, and the number of bubbles in the molten glass decreases sharply. Thus, in accordance with the process of reducing the number of bubbles in molten glass during cooling, it is possible to slowly cool the glass at a cooling rate of not more than 2 ° C / min (preferably not more than 1 ° C / min) only within the temperature range of about 1390 ° C, whereby a more efficient reduction of bubbles occurs, and it is rapidly cooled by forced cooling at a rate of, for example, at least 3 C / min at temperatures outside this range, due to which glass cooling is slowed down. The presence of a peak with a decrease in the number of bubbles of about 139.0 ° C is due to the fact that the remaining bubbles are bubbles of SOj and these bubbles rapidly dissolve in the molten glass at a temperature of about. 1390 ° C.
    , Since the cooling pool is 7. consists of the first zone of rapid cooling, the zone of slow cooling and the second zone of rapid cooling, there is no need to make it large in size. In zones 7a and 7c, the heat of the molten glass 6 is absorbed by the air blown into these zones by the radiator cooling devices 10, and the hot air is removed from the tank for efficient use. The depth of the cooling pool 7 is small. Creating a shallow cooling basin makes it possible to slow the return flow of molten glass from the side of the cooling basin towards the melting pool and adjust the temperature difference in the direction of the width of the pool. In this way, the use of the energy required to reheat the cooled, molten glass that has flowed back can also be eliminated.
     The number of zones in the cooling basin 7 may be more than three, because the temperature of the absorption peak varies depending on the type of bubbles. Forced cooling agents may also include water cooling
    /
    by installing a water cooled tube in molten glass. In this case, the partitions 9 are not needed.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    The method of cooking soda lime silicate glass, including melting; Charge, homogenization, clarification and cooling of glass mass before production, characterized in that, in order to improve the quality of glass mass, cooling is carried out in a separate pool from a temperature of clarification to 1410 ° C at a speed of 3-8 ° C / min, from 1410 to 1370 ° C - at a rate of 1-2 ° C / min, from 1370 HP to the molding temperature - at a speed of 3-12 ° C / min.
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    同族专利:
    公开号 | 公开日
    GB2162510A|1986-02-05|
    GB2162510B|1988-01-20|
    DE3523620C2|1993-09-02|
    BE902756A|1985-10-16|
    JPH0443848B2|1992-07-17|
    GB8516623D0|1985-08-07|
    FR2566764B1|1991-07-26|
    US4652293A|1987-03-24|
    US4778509A|1988-10-18|
    FR2566764A1|1986-01-03|
    DE3523620A1|1986-01-23|
    JPS6117427A|1986-01-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE85569C|
    US1893061A|1929-09-19|1933-01-03|Hartford Empire Co|Forehearth for molten glass|
    US2735229A|1939-08-25|1956-02-21|honiss|
    US2513732A|1944-12-06|1950-07-04|Installation for the continuous |
    GB1060622A|1964-02-29|1967-03-08|Elemelt Ltd|Improvements relating to a method of melting and supplying glass along a feeder duct|
    US3645712A|1970-05-06|1972-02-29|Corning Glass Works|Radiation target structure and use to cool molten glass|
    SU504710A1|1974-01-02|1976-02-28|Московский Ордена Ленина Энергетический Институт|Glass furnace|
    FR2550523B1|1983-08-09|1986-07-25|Saint Gobain Vitrage|METHOD AND DEVICE FOR MELTING, REFINING AND HOMOGENEIZATION OF GLASS, AND THEIR APPLICATIONS|
    US4680051A|1983-12-07|1987-07-14|Emhart Industries, Inc.|Glass forehearth|US5573569A|1993-06-15|1996-11-12|Beteiligungen Sorg Gmbh & Co. Kg|Method for conditioning and homogenizing a glass stream|
    US5630860A|1993-06-15|1997-05-20|Beteiligungen Sorg Gmbh & Co. Kg|Method and apparatus for conditioning and homogenizing a glass stream|
    US5634958A|1993-06-15|1997-06-03|Beteiligungen Sorg Gmbh & Co. Kg|Method and apparatus for conditioning and homogenizing a glass stream|
    DE4327237C1|1993-08-13|1994-08-25|Sorg Gmbh & Co Kg|Method of melting glass in a tank furnace and tank furnace for this|
    FR2785602B1|1998-11-06|2001-11-02|Stein Heurtey|DEVICE FOR CONTROLLING THE COOLING OF GLASS IN GLASS MELTING AND REFINING OVENS|
    US7584632B2|2005-07-28|2009-09-08|Corning Incorporated|Method of increasing the effectiveness of a fining agent in a glass melt|
    US7854144B2|2005-07-28|2010-12-21|Corning Incorporated|Method of reducing gaseous inclusions in a glass making process|
    US20100199721A1|2008-11-12|2010-08-12|Keisha Chantelle Ann Antoine|Apparatus and method for reducing gaseous inclusions in a glass|
    CN102320721A|2011-08-11|2012-01-18|华尔润玻璃产业股份有限公司|Float horizontal-flame glass melting furnace|
    US10570045B2|2015-05-22|2020-02-25|John Hart Miller|Glass and other material melting systems|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP13767284A|JPH0443848B2|1984-07-02|1984-07-02|
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