• 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:
    GLASS FOR THE FORMATION OF A PROTECTIVE LAYER IN THE OVEN, including, ABj Oj, characterized in that, in order to increase the service life of the furnace, it contains these components in the following amount, wt.%: 55.44 31.29 SiOz 13, 27
    公开号:SU1099840A3
    申请号:SU782692852
    申请日:1978-12-01
    公开日:1984-06-23
    发明作者:Барта Петер；Тутсек Александер
    申请人:Рефратехник Гмбх (Фирма)；
    IPC主号:
    专利说明:

    C ©
    with
    00
    4 The invention relates to a phosphate glass based on - SiO PjOj for forming a protective layer in a furnace as a lining for refractory, heat insulating bricks intended for heating zones of rotary cement kilns. The refractory lining of heating zones of rotary cement kilns is 25-45% of the total the length of the furnace and is subject to mechanical and chemical effects. The latter is very high due to the release of alkali metal oxides, sulfates, chlorides and alkali metal fluorides as raw materials and fuels. In the case of using fireclay lugs for fires of the fire stoves, they are alkaline by splitting them into feldspar, which increases the coefficient of thermal expansion of the bricks and leads, ultimately, to rapid wear of the bricks. The use of lightweight refractories for furnace lining leads to the formation of glazing protective layers on their surface. Prevents or retards the penetration of alkalis into the brick. However, no protective layers are formed in the presence of KCi in the furnace atmosphere. Glass is known for forming a protective layer on refractories in a furnace of the following composition, nos.%:, 384 .0; SiO256, Fe2O, l, 4 1. The closest to the proposed result achieved is glass of the following composition, wt.%: PjOj 45-80; A &8-25; SiOj 1-30 2 However, these glasses form an icing on refractories and can prevent them from corroding only in an atmosphere that does not contain KClJ. The phosphate glass of system P; Oz ArJ-j O-SiO2 does not form a glass phase that is compatible with the SiO2 and mullite phases and cannot be used for autogenous glaze formation on refractories, i.e. the service life of refractories in the case of their use is not high (approximately 0.5-1 g). The purpose of the invention is to increase the lifetime of the furnace. The goal is achieved by the fact that glass to form a protective layer in the furnace, including SiO and, contains the indicated components in the following amount, May,%: RgO; 55.44 Si02 31.29 .13.27 The total formula of a melt of a glass phase) or SiOj-Ab O.,. Only this glass phase is compatible with SiO phases, in particular with cristobalite and tridimite, as well as mullite, and can protect bricks from being eroded. The content of each component of the mixture used to obtain the described glass is in the diagram. Only the specified glass composition provides an autogenous formation of glaze protecting the brick from being eroded. With a higher content of SiO, a too liquid melt is formed which does not form a glaze. With a lower SiO content, too little melt is formed, as a result of which glaze is also not formed. Only at the indicated ratio of components does the glazing phase contribute to the formation of glaze, which is compatible with crystalline phases appearing in fireclay bricks when heated (mullite, cristobalite, tridymite). If there is no compatibility with Tc1, then the bricks are unstable, as if dissolving, those. furnace life is low. The raw materials for the charge can be used as pure oxides of SiO2 and zS compounds: cristobalite, tridymite, diatomaceous earth, chamotte, alumina. (etc. The initial charge is used in the form of grains, and 10-45% The grains are smaller than 0.09 mm. Glass melting is carried out at 700 - 1100 ° C using conventional methods. Example: Merch (X-ray amorphous) Al1O2 gel, AljOj (active, neutral) and phosphoric acid () are mixed in a 4: 1 molar ratio : 3 (in terms of pure oxides), heated at 700 ° 1000 ° C for several hours and studied coziness by X-ray diffraction, which proves the formation of the Si2AEO glass phase (P04}. Welded glass is used to protect refractories in the furnace, forming together with them autogenously sealed refractory, heat insulating bricks. The surface of bricks covered with this glass is exposed to the temperature at which The Si2AfO (PO4) j phase forms a highly viscous melt. As the bricks from the furnace to the furnace shell are exposed to a temperature gradient, the temperature to the furnace shell decreases. Thus, only the hot, inward-facing brick surface inside the kiln is vitrified, while the remainder remains unglazed. When reducing the thickness of the lining
    31099840
    bricks always re-form 5- kiln furnaces up to 2-4 years, then the bruise is on the surface and protects the brick-like kilns lined with a known brick from wear, i.e. increases the term of pichom, have a service life of 0.5-1 g.
    权利要求:
    Claims (1)
    [1]
    GLASS FOR FORMATION OF THE PROTECTIVE LAYER IN THE FURNACE, including P About , БУ ^ and АЕ 2 0}, characterized in that, in order to increase the life of the furnace, it contains these components in the following amount, wt.%:
    R g 0 $ 55,44
    SiO 2 31.29
    Αί 2 Ο 3 13, 27
    With
    类似技术:
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    ES2699875T3|2019-02-13|Process for the production of a refractory material with a high degree of spectral emission, as well as a method to increase the degree of spectral emission of refractory molded bodies
    Leupold et al.1984|Improvement of resistance to alkali attack of refractory materials of the SiO 2-Al 2 O 3 system for temperatures up to 1300 C in rotary cement kilns
    同族专利:
    公开号 | 公开日
    ES468598A1|1979-07-16|
    FR2411164A1|1979-07-06|
    JPS5829268B2|1983-06-21|
    DE2754190B1|1979-04-12|
    US4213789A|1980-07-22|
    EP0002194A1|1979-06-13|
    FR2411164B1|1980-10-24|
    AR216195A1|1979-11-30|
    IN150628B|1982-11-20|
    PH15123A|1982-08-10|
    MX162078A|1991-03-25|
    AU4202978A|1979-06-14|
    JPS5488919A|1979-07-14|
    BR7807863A|1979-07-31|
    IT7820603D0|1978-02-24|
    US4303449A|1981-12-01|
    AU517854B2|1981-08-27|
    AR219997A1|1980-09-30|
    IT1095359B|1985-08-10|
    EP0002194B1|1982-05-12|
    MX152180A|1985-06-06|
    DE2754190C2|1979-12-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE580295C|1930-09-19|1933-07-08|Ig Farbenindustrie Ag|Phosphate glasses|
    BE461041A|1941-09-15|
    GB576205A|1944-04-26|1946-03-22|Arthur Abbey|Improved glass composition and method of producing same|
    DE1063954B|1958-07-08|1959-08-20|Chamotte Ind|Glaze for basic and acidic firebricks|
    GB1005469A|1962-01-17|1965-09-22|Steinwerke Feuerfest Karl Albe|Method of manufacturing light weight refractory bricks|
    US3236662A|1962-03-19|1966-02-22|Corning Glass Works|Semicrystalline body and method of making it|
    US3944352A|1974-06-17|1976-03-16|Corning Glass Works|Heat absorbing glasses|US5744208A|1994-06-24|1998-04-28|Corning Incorporated|Glass-ceramics containing lithium disilicate and tridymite|
    GB9904083D0|1999-02-24|1999-04-14|Brightcross Manufacturing Limi|Thermally insulated refractory articles|
    EP1699742B1|2003-12-30|2019-01-16|Corning Incorporated|High strain point glasses|
    EP1730084B1|2003-12-31|2017-05-17|Corning Incorporated|Aluminum silicophosphate glasses|
    GB2426246A|2005-05-19|2006-11-22|Univ Basel|Method for producing glass from straw|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2754190A|DE2754190C2|1977-12-06|1977-12-06|Phosphate glass in the Al2 O3 -SiO2 -P2 O5 system, process and batch for its production and use of the glass and batch|
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