• 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:
    1466053 Seam mix for carbon blocks ALUMINUM CO OF AMERICA 18 Feb 1975 [11 March 1974] 6881/75 Heading C1A [Also in Division C7] A mix suitable as a seam mix for sealing electrolyte cell linings in the production of Al is prepared from a C aggregate and a binder which are blended with a solvent having a boiling point of from 150‹ to 350‹ C. the solvent consisting of at least one aromatic hydrocarbon having only saturated side chains, as defined, the solvent being in an amount sufficient to render the mix capable of being tamped without the application of heat. The term "saturated side chains" includes radicals such as Me- and Et-, and also the H-atom alone. The C aggregate is typically anthracite, calcined to expel volatiles, the solvent preferably a crude methyl naphthalene solvent with a composition: 12Œ5% naphthalene, 55Œ5% α- and #-methyl naphthalene and 33 Œ 5% dimethyl naphthalene and the binder preferably a coal tar pitch. In an example, a seam mix, prepared for a Hall -Heroult cell, contains 88 wt. per cent calcined anthracite aggregate and 12 wt. per cent of coal tar pitch of about 50‹ C. softening point; the pitch being compounded by mixing 13À5 wt. per cent of 110‹ C. and 86À5 wt. per cent of 40‹ C. softening pitch. The aggregate was introduced into a mixture of the pitch and 10% by wt. of the crude methyl naphthalene solvent and the mixture tamped into the cell seams and set for 8¢ h. under a two-burner flame heater.
    公开号:SU995704A3
    申请号:SU752111403
    申请日:1975-03-05
    公开日:1983-02-07
    发明作者:Делл М.Бенджамин
    申请人:Алюминиум Компани Оф Америка (Фирма)；
    IPC主号:
    专利说明:

    Peck7-17
    M etu1nafgapinovy and solvent0,6-2,7
    Calcined carbon filler Else The use of the mass of the specified composition reduces its volume & shrinkage when the electrolyzer is heated to its working. temperature () to less than 2%, about 1%. Much greater shrinkage is observed when the mixture contains a methylnaphthalene charity above the specified limit. In the case when the mass contains less than 0.6 wt.% Methylnaphthalene solution of bodies, it has a satisfactory amount of volume shrinkage when heated, however, the mass has not enough plasticity so that it can be easily filled into the seams at room temperature. . The proposed mass is prepared as follows.
    The binder (pitch (coal or oil) binder) is mixed with methyl naphthalene solvent and the mixture is poured into an unheated mixer, in which the carbon filler is already rotating. Stirring is continued until a uniform coating on the carbon filler from the binder-solvent combination is obtained.
    Example 1. A carbon-containing mass is used to (repair) the pits in the Hull-Herolt cell, which already has a service life, due to which it is necessary to change the lining. The hole is a hole between the carbon cathode blocks, in which the initial weld is subjected to erosion, as a result of which the metal flows out of the cell. Liquid contents are poured from the cell and allowed to cool. The metal hardened in the pothole is removed. The cleaned place is filled with a crosslinking mass containing S8 wt.% Carbon filler and 1 O, 8 wt.% Pitch having a softening point of SO C. Such pitch is obtained by mixing 13.8 wt.% Of pitch with a softening point and 86, 5 wt.% Pitch with a softening temperature of 40 ° C. The filler is calcined arthritis and has the following size of particles (expression -3 / 8H-4, for example, means that parts often pass through 3/8-inch
    (O, 95 cm) sieve, from the Taylor series and lingers on the sieve # 4):
    particle size inch
    Weight.%
    + 3/8 2.7
    -3/8 + 4 10.7
    -4 + 8 13.4
    -8 + 14 10.2
    + 14 + 28 12.6
    -28 + 48 15.8
    -48 + 100 11.9 -100 + 200 10.6
    The sump 12.2 ek is heated to and then mixed with 1.2 wt.% Methylnaphthalene solvent. The solvent contains wt.%: Naphthalene 12, alpha and beta metsna naphthalenes 55, dimethylnaphthalene 33 and has the following characteristics:
    Distilla chi, 5% then ka, C Not shocked 232
    Distil qi 95% point, “C
    Not below 255
    Specific weight at
    15 ,, g / cm
    1, O10-1, OZO
    Acid fraction of tar, max 2%
    Nitrogenous bases
    coal
    tar,%
    Maximum 2
    Water,% Maximum 0.5
    Flash point
    2O4
    The filler is placed in a mixer, the latter is turned on and a mixture of races is supplied with the help of moving knives of the mixer. creator and pitch. Stirring is continued until a uniform distribution of the peck-solvent mixture in the filler occurs. Mixer or apregat not heated. The resulting mass is transferred to the other side of the Hull-Herolt cell, which is to be repaired. Before pouring the mixture into the pothole, the sides of the pothole are covered with a layer of preheated pitch having an expansion temperature of 130 ° C. The crosslinked mixture is loaded in successive layers into a cleaned hole with a frame tamper, and then with a manual tamper board PS to seal the uppermost layer. After the PS mixture is placed in a hole, the cell is placed in a heater using a two-nozzle heater. The temperature of the mass at the end of this time is 125 ° C, which is reached in 4-5 hours of stay in the water heater. The cell works for the electrolysis of AB2Oz for 9 hours after the preheating is completed, and examined for 30 days after the start of work. Research outside shows that the state of the element is good. After 10 months of operation, no metallic iron is contained in the metallic aluminum cell element.
    (the presence of a high content of iron for 5 years was carried out for a long time indicates that the seam is leaking), the period of "me, in the present case
    Example2. In a mixer, using a new element at a coal-carbonate temperature, a mixture of natural blocks and a cross-linking mass is prepared, but the use of 11.4 wt.% Baking between them is subjected to honey;
    t "1 softening temperature 52С, 87 wt.% 10heating to 90О-10СЮ ° С in inert
    a filler, and a methylnaphthalene solution-atmosphere for several hours, an example agent. 1, which is taken in the amount of 1.6 wt.% Pitch. This mass of io-in. The table shows the results and is used as a cross-linking mixture for testing the bulk of the proposal
    when designing a new element for isusage (when heated at a speed of 80 deg / h
    aluminum production. On carbon up to 55 ° C, and 5 ° C / h, coatings are not applied to the blocks. Carbon backed at 95 ° C 1O h) for various
    the blocks are at xymatical temperature-types of calcined carbon filler, and the mixture is also poured at the rooms (with a pitch content in the mass of 7 at room temperature (25 ° C). Although 2017 wt.%).
    dick, include a simple prelude; (the screech described in example 1 is satisfactory for such a special cell, since
    Calcined Anthracite
    Petroleum coke
    (calcined)

    g
    Pitch coke, (n (yukalenny)) As follows from the data in the table, the volume shrinkage of the proposed mass is less than 2%. The optimum content of the components for the connecting mass is, in mass%: calcined anthraPite 86.9, pitch11, 9 and methylnaphthalene solvent 1,2. Pitch is a furnace coke pitch with a high content of aromatics (93-95% by nuclear magnetic resonance) and a quinoline insoluble content of 9% by weight. Methylnaphthalene solvent contains, by weight,% :
    2 2
    4 2 42
    one
    2 and beta methylnaphthalene 55, dimethylnaphthalene 33 and naphthalene 12. The connective mass, with an optimum composition, glitters the apparent density in its raw form. 1.5 g / cm and apparent density after calcination 1.45 g / cm. Invention Formula Carbonaceous mass for connecting carbon blocks in an aluminum electrolyzer, including calcined steam.
    766SV648
    GGperodi iil tsapoltggel, built pecsMetshishfthtalnnovy rao
    W organic solvent, from l to the creator indicated above (V6-2,7
    so with the purpose of the talc carbon
    reducing the volume shrinkage mass
    heating up to the working temperature of the electric
    laser, as an organic solution, taken into account in the examination, it contains methylnaphthalene. USSR author's certificate
    solvent with bp. 2OO-ZbO S at W, 386224, cl. From 01 to 31 / O4, 1971.
    the following ratio to (ponentov, wt.% :; 2. US Patent No. 35767OO,
    Pek7-17. 161-38, 1971 (prototnp).
    权利要求:
    Claims (1)
    [1]
    Claim
    Carbon-containing mass for joining carbon blocks in an aluminum electrolysis cell, including calcined
    7 995 704 carbon ίΐ: a filler, a binder — pitch and an organic solvent, which is characterized in that, in order to reduce the bulk shrinkage of the mass when the electrolyzer is heated to operating temperature, it contains a methyl naphthalene solvent with t. bale. 200-300 ° C in the following ratio of components, wt.% Peck 7-17
    Methylnaphthalene solvent as defined above OUB-2.7 Calcined carbon filler
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    同族专利:
    公开号 | 公开日
    RO67674A|1979-07-15|
    DE2509550C3|1986-04-17|
    DE2509550B2|1980-02-14|
    FR2264107B1|1978-08-11|
    AU7842675A|1976-08-26|
    GB1466053A|1977-03-02|
    DE2509550A1|1975-09-25|
    CA1055687A|1979-06-05|
    NO144392C|1981-08-19|
    CH603822A5|1978-08-31|
    NO750562L|1975-09-12|
    US4167419A|1979-09-11|
    SE404037B|1978-09-18|
    BR7501322A|1975-12-09|
    JPS50123015A|1975-09-27|
    HU172750B|1978-12-28|
    NO144392B|1981-05-11|
    FR2264107A1|1975-10-10|
    PL106979B1|1980-01-31|
    JPS5615470B2|1981-04-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2270199A|1940-01-05|1942-01-13|Dow Chemical Co|Graphite article|
    GB651435A|1948-06-02|1951-04-04|C D Patents Ltd|Manufacture of carbon moulded bodies|
    DE870782C|1950-01-13|1953-08-10|Us Steel Company|Device for centering or transverse displacement of an object moving over a rotating roller|
    US2903374A|1952-03-06|1959-09-08|Elektrokemisk As|Process of making carbonaceous electrode paste|
    US3020220A|1952-09-09|1962-02-06|Helling Werner|Continuous carbon electrode|
    US2888357A|1954-05-26|1959-05-26|Koppers Co Inc|Thermal insulation material|
    DE1102030B|1959-12-03|1961-03-09|Hoechst Ag|Resetting agent of the binding pitch for the production of carbon molded bodies|
    US3035932A|1961-01-27|1962-05-22|Aluminum Co Of America|Electrode binder pitch|
    US3072558A|1961-02-13|1963-01-08|Dow Chemical Co|Composite anode|
    US3241984A|1962-03-07|1966-03-22|Hill & Griffith Company|Additive for foundry molding sand|
    US3187089A|1962-06-21|1965-06-01|Union Carbide Corp|Carbonized joint between carbon electrodes|US4264371A|1974-03-11|1981-04-28|Aluminum Company Of America|Room temperature seam mix|
    US4282039A|1980-06-30|1981-08-04|Reynolds Metals Company|Carbon ramming mix|
    US5120478A|1988-09-06|1992-06-09|Alcan International Limited|Cement for collector bar-carbon block joints of electrolytic cells|
    RU2672123C2|2016-03-31|2018-11-12|Владимир Васильевич Шапкин|Method for flow-line manufacture of cathode sections combined with installation of bottom of electrolyzer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/449,592|US4167419A|1974-03-11|1974-03-11|Mix suitable for use in seams between carbon blocks|
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