• 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 process for controlling the electrostatic separation of crushed chemically conditioned and triboelectrically charged potash salts in a free fall wherein the setting angles of deviating blades for the separated material are controlled by means of a process computer in dependency on the K2O-content of the residue which accumulates in the proximity of the negative, separating electrode. The mutual position of the blades determines the K2O and NaCl discharge and the amount of the obtained middling material.
    公开号:SU1475477A3
    申请号:SU853948857
    申请日:1985-09-04
    公开日:1989-04-23
    发明作者:Пфо Оскар；Радик Христиан；Тенерт Хельмут
    申请人:Кали Унд Зальц Аг (Фирма)；
    IPC主号:
    专利说明:

    one
    This invention relates to the separation of natural potassium salts into their main components by electrostatic separation.
    The purpose of the invention is to improve the accuracy of control of electrostatic separation.
    Method of controlling electrostatic separation of ground, chemically conditioned, and triboelectrically charged natural potassium salts in electrostatic free-fall separators with production of concentrate, waste
     CH
    and the intermediate product consists in supplying the natural potassium salt to the separation in an electrostatic separator and controlling the separation of the potassium salt by setting the slope of the separation languages located under the electrodes of the electrostatic separator relative to the vertical. The content in the waste is set, the amount of intermediate product, the yield of K20 in the concentrate and the output of NaCl in the waste, the content of K20 in the waste, the amount of the intermediate obtained, the amount of natural potassium salt fed to the separation, the amount of K20 in the concentrate, the content of kieserite in the natural potassium salt supplied to the separation, the content of kieserite in the waste. Depending on these measured values, the output in concentration and the output of NaCl in the waste are determined, and the angle of inclination of the separating tabs is controlled by a computer to control the process depending on the deviation of the specified value of the content in the waste, the specified amount of intermediate product and the measured actual value of the amount of the resulting intermediate product, the given value of the KЈ0 yield in the concentrate and determined from the results measured and the output of K20 in concentrate, the given value of the NaCl yield in the waste and the value of the NaCl output in the waste determined from the measurement results.
    The content in the waste and in the concentrate is determined on the basis of a weakly radioactive K-isotope,
    The yield of CgO in concentrate is determined by the formula
    I
    m, wk awx
    GOMD-HA
    100%,
    de x
    MK XR + MWk-xWK
    May.%;
    50
    Amft
    MWK MA-M De Ch. To, o EXIT ° D kg ° in concentrate;
    M
    M
    WK MR
    the amount of natural potassium salt supplied 55 per separation; amount of concentrate; amount of waste;
    XA is the content of K20 in the natural potassium salt supplied to the separation; XR - the content of K20 in the waste; - content of K20 in concentrate.
    The waste NaCl yield is determined by the formula
    MR YR
    2Wasg m7 100% |
    where, 35Z, + 98.8, wt.%;
    five
    0
    five
    0
    35
    40
    45
    50
    55
    2 - about: 1z2 + W “wt%
    , 03Z2 + 92.06, wt%;
    22 о; 1з2 + WA mass%;
    where NacE is the output of NaCl in the waste; MR is the amount of waste; Mfi is the amount of natural potassium salt supplied to the separation;
    Y is the content of NaCl in the waste; XR - content of KAO in the waste; W content of kieserite in the waste;
    Yft is the content of NaCl in the natural potassium salt supplied to the separation; X. - content in natural potassium salt supplied to the separation; Wft - kizerite content
    natural potassium salt supplied to the separation. The content of kieserite in the waste is measured continuously by infrared reflection, and the content of kieserite in the natural potassium salt supplied to the separation is measured by chemical analysis at predetermined time intervals.
    The drawing shows a construction diagram for carrying out the proposed method.
    The method is carried out as follows.
    The supplied material flows into the inlet tray 1 of an electrostatic separator 2 with a free fall through the device 3 for determining the amount, such as metering belt weights, the measurements of which are transmitted by wires 4 to the processor 5. From the natural potassium salt separated by the action of the electrostatic field by means of an adjustable separating language 6, the waste is separated, and the concentrate is separated by means of an adjustable release language 7, while passages are collected between the release languages 6 and 7. past the intermediate product, if necessary, after additional grinding, is again added to the supplied natural potassium salt. In this circulation of the intermediate material is placed a device 8 for determining the number of measurements of which are transmitted by wires 9 to the processor 5. In the exit shaft, Probes 10 and 11 for determining the content of K20 kieserite and device 12 for determining the amount of waste. Measurements of devices 10–12 are transmitted by wires 13–15 to processor 5. measures in concentrate, which mainly consists of potassium chloride and kieserite and is referred to as KMg-concentrate, a device 16 is provided for determining the content, which is transmitted to the processor 5 via its wires 17.
    The separation tongue 6 for moving away is moved along the signals of the processor 5 by means of a rotational drive through the wires 18. The angle that makes up the separation tongue 6 with the vertical decreases or increases during the exchanges. Through this rotational movement, the composition, the amount and the output and NaCl are affected. If the installation angle of the interlocking tongue 6 relative to the vertical decreases or increases, the K20 content in the waste increases or decreases, the output K-0 increases or decreases and the output of NaCl decreases or increases. The processor 3 compares the magnitudes of the outputs and the magnitudes of the measurements calculated from the mathematical expressions with the stored values stored in the memory and, accordingly, controls the partition language 6.
    The amount of natural potassium salt supplied to the separation of MD, intermediate product M, and waste by means of suitable devices, such as belt weights, is determined at measurement points 3, 8 and 12. Measured at point 8, transmitted over
    wires 9 to processor 5, the amount of intermediate product returned for separation in processor 5 is compared with the specified limit for the product to be recycled. If the returned quantity of the intermediate product exceeds this limit,
    then the processor 5 through the wires 19 gives impetus to the drive of the interchange language 7, so that it will increase its installation angle relative to the vertical. If the limit value is not
    5 is reached, the installation angle of the interlocking tongue 7 is accordingly reduced.
    Between successive changes in the slope of the separation
    Q languages 6 or 7 should be a minimum time interval of 30 minutes, since the effect of such a change appears only after about 20 minutes. Processor 5 should preferably be
    5 is executed so that it is possible to call measured and calculated values stored in memory.
    According to the proposed method, it is possible by
    0 to measure the values, to regulate the optimization of the separating action of the electrostatic separator with a free fall, to exclude the manual inclination of the separating language and the resulting error. In addition, the proposed method allows a multi-stage method of electrostatic separation of potassium salts in several free-fall electrostatic separators installed one after the other with optimal separation performance and quality.
    E
    0
    权利要求:
    Claims (5)
    [1]
    1. A method for controlling electrostatic separation of ground, chemically conditioned, and tribo-electrically charged natural
    potassium salts in electrostatic free-fall separators to produce a concentrate, waste and intermediate product, including feeding the natural potassium salt for separation into an electrostatic separator and controlling the separation of the potassium salt by setting the angle of inclination located under the electrodes
    71475
    electrostatic separator separating languages relative to the vertical, characterized in that, in order to improve the accuracy of control of electrical separation, the content of K40 in waste, the amount of intermediate product is set, the output values Kj, 0 in concentrate and NaCl output in waste are measured as limit values, K40 in the waste, the amount of the intermediate obtained, the amount of the natural potassium salt supplied to the separation, the amount of the waste, the content in the concentrate, the content of kieserite in p According to the measured values, the yield in the concentrate and the output of NaCl in the mercury flow are determined by the measured values of the potassium salt in the waste, and the angle of inclination of the separating tongues is controlled by a computer to control the process depending on the deviation of the specified value s from the actual the K20 content of the waste, the specified amount of the intermediate product and the actual value of the amount of the intermediate obtained, the specified K20 yield value at the end wasting and specific values for the measurement results output K20 in the concentrate, the predetermined value output NaCl in waste and a certain value of the measurement results output NaCl to waste.
    [2]
    2, Method pop 1, characterized in that the content of K20
    waste and concentrate are determined on the basis of a weakly radioactive K4 isotope.
    [3]
    3. Method pop. 1, characterized in that. The yield of CrO in concentrate is determined by the formula
    I
    MWK WK
    where hd
    MMD HA
    Mc-Hz + Mk-Hk
    100%,
    Md MWK MA-MR
    , wt.%;
    eight
    eЈKg0 - output K20 in concentrate;
    Mft is the amount of natural potassium salt supplied to the separation;
    Mz - the amount of concentrate; MR is the amount of waste; HD - the content of K20 in natural potassium salt supplied to the separation;
    XR - the content of K20 in the waste; XWK content of K20 in concentrate.
    [4]
    4. The method of steps 1 and 2, which is characterized by the fact that the output of NaCl by waste is determined by the formula
    (7 - M-SLXiL. 1LP7 / NQCE Mfl-Yfl 100%
    e YR -1, 35Z, + 98,8, wt.%; XR
    z "57632 + WR MaCi%
    YA -1r03Z7 + 92.06 wt.%:
    Z 07632 + WA oil where fm "sE is the output of NaCl in the waste; MR is the amount of waste; MD - the amount of natural potassium salt supplied to the separation;
    Ґц - the content of NaCl in the waste; XR - content in the waste; WR - content of kieserite in the waste;
    Yft is the content of NaCl in the natural potassium salt supplied to the separation; X. - the content of K20 in natural potassium salt supplied to the separation;
    Wft is the content of kieserite in the natural potassium salt supplied to the separation.
    [5]
    5. The method according to claim 4, wherein the content of kieserite in the waste is measured continuously by means of infrared reflection, and the content of kieserite in the natural potassium salt supplied to the separation is measured by chemical analysis at predetermined time intervals.
    eight
    M - 1
    R
    -ABOUT
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    US4743362A|1988-05-10|
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    DE3434190C1|1985-10-24|
    FR2570296A1|1986-03-21|
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    引用文献:
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    US2782923A|1951-03-30|1957-02-26|Internat Mincrals & Chemical C|Method and apparatus for beneficiating ore|
    AT249416B|1961-10-20|1966-09-26|Prerovske Strojirny Np|Device for obtaining average samples from homogenized raw materials|
    US3339700A|1965-09-24|1967-09-05|Armstrong Cork Co|Sampling apparatus|
    US3430870A|1967-03-01|1969-03-04|Aerofall Mills Ltd|Fast magnetic drum ore separator control|
    US3429439A|1967-03-01|1969-02-25|Aerofall Mills Ltd|Slow magnetic drum ore separator control device|
    US3493109A|1967-08-04|1970-02-03|Consiglio Nazionale Ricerche|Process and apparatus for electrostatically separating ores with charging of the particles by triboelectricity|
    DE1283772B|1967-12-13|1968-11-28|Kali Forschungs Anstalt|Process for the electrostatic processing of crude potash salts|
    DE1953534C3|1969-10-24|1974-03-14|Kali Und Salz Ag, 3500 Kassel|Process for the electrostatic treatment of crude potash salts containing Kiesent|
    GB1464491A|1974-04-23|1977-02-16|Polysius Ag|Sampling device|
    SU583385A1|1975-07-18|1977-12-05|Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт По Автоматизации Промышленности Строительных Материалов|Device for flow sampling of freely falling powder-like materials|
    FR2331786B1|1975-11-13|1978-09-22|Groupe Etud Const Urbanisme Am|
    SU776642A1|1978-01-05|1980-11-07|Среднеазиатский Ордена Трудового Красного Знамени Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Среднеазиатского Отделения Васхнил|Method of automatic control of loose material separation in electric field|
    SU780887A1|1978-12-04|1980-11-23|Верхнеднепровский горно-металлургический комбинат|Method of controlling gravitation-type enrichment process|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19843434190|DE3434190C1|1984-09-18|1984-09-18|Method and device for controlling the electrostatic separation of crude potassium salts in electrostatic free-fall separators|
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