• 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 an ore sorting device and makes it possible to increase the sorting efficiency i. Each piece examined by the analyzing unit is individually irradiated. with the help of two gamma-radiation sources operating at different levels of energy. Sources are chosen in such a way that the Compton effect prevails at one energy level, and the Compton effect and the photoelectric effect compete with each other. The last of the effects is strictly dependent on the sequence number of the element. Thus, by detecting with at least one detector the intensity of dispersion and comparing the intensity of dispersion with each other, it is possible to obtain the proportion of heavy elements in one course of ore. But this indicator is sorted, ore, 3 sludge. O) sd ate cm
    公开号:SU1355111A3
    申请号:SU813337799
    申请日:1981-09-14
    公开日:1987-11-23
    发明作者:Сипиля Хейки；Киуру Эрки；Вайярви Сепо
    申请人:Оутокумпу Ой (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to devices for sorting ores and can be used in ore beneficiation.
    The aim of the invention is to increase the sorting efficiency.
    Fig. I is a schematic representation of the device for sorting, side view; fig 2 is the same end view; in fig. 3 is a block diagram 10 of the device, made in the form of electronic units.
    The device contains two sources 1 and 2 of gamma radiation, each of which has a different level of energy 15 and is placed in the same location in the radiation-shielding screen 3. The device also has a photocell 4 that records the passage of ore pieces 5 and is measured The detector detector 6, in addition, the device for sorting ores includes the analyzing unit 7, the interface unit 8, the calculator 9 and the conveyor control unit 10, the stabilized high voltage block 11, the control panel 12, the node 13 control cusco ore blocks 14 and 15, respectively, stabilize the temperature and supply voltage. ZO The reason for using two pairs of sources is that in this way a stronger and more uniform study can be directed to piece 5, which is reduced by piece 5 which is the subject of analysis. The energy level of radiation source 1 and respectively source 2 can be, for example, approximately 20-150 keV, and the energy level of another source 40, radiation and accordingly source 2 can be approximately 300-1500 keV. Am-24l are used as the source of radiation. and Cs-137, whose intensities are 45 approximately 60 keV and 600 keV. The principle of operation of the device is as follows.
    A detector 6 is located symmetrically with respect to the source pairs, which in this case is a scintillation detector that works with energy dissipation.
    In order to determine the starting point of the measurement, a conventional gg photocell 4 is installed, located slightly above the source-detector combination, which senses the arrival of piece 5, when the piece crosses
    beam of light between the light source and the photocell 4..
    Thus, an essential feature of the present invention is that a piece of ore is irradiated with two sources of gamma rays, each of which has a different level of energy intensity. The energy of one is chosen so that the Compton effect prevails. The energy of the other is chosen so that the photoelectric effect and the Compton effect compete with each other. The photoelectric effect strongly depends on the element number, while the Compton effect does not depend on the number. By measuring the ratio of the intensities of these two scatterings having different energy levels, a value is obtained that represents the proportion (content) of heavy elements in the ore. In many cases, the ore or waste rock can be very distinct from each other. The shape and size of the piece of ore do not have any effect on the result. The radiation energy can be selected so that the penetration will be substantially high in order to prevent the effect of contamination of the ore surface on the result.
    The main control and measurement operations in the proposed device are carried out by the analyzing unit 7, the conjugation unit 8, the calculator 9 and the conveyor control unit IO, which regulates the flow of ore pieces 5 into the analysis zone. An essential element of the electronic system of the device is that the intensity I and, respectively, II of scattered radiation are measured by means of a detector with energy dissipation for each source. The corresponding background intensities 1 and Id are subtracted from these values and the difference ratio is finally formed.
    I - I,
    T
    II - II,
    which is used as the resultant value of the analysis performed. In the usual case, the dry T is the proportion of the heavy element or elements in the piece. .
    This value of T is fixed in block 7 and compared with the threshold of the grading of Tr, which is established by the calculator 9, This threshold is the final result and determines the conduct of further operations to sort the ore.
    The use of the present invention improves the sorting efficiency.
    权利要求:
    Claims (1)
    [1]
    Formula
    A device for sorting ores, containing a conveyor with a measuring detector located above it, energy sources and a conveyor control unit, characterized in that, in order to increase the sorting efficiency, it has an analyzing unit, interface unit, calculator, and energy sources are located in the measuring case detector from the working surface of the conveyor, while the output of the measuring detector is connected to the information input of the analyzing unit, 10 outputs of which are connected to the first inputs of the mat tim associated second inputs to the outputs of the calculator, wherein, the second inputs of the analyzing unit and the inputs of the calculator and control unit 15 connected to the conveyor output interface unit, and as a source of gamma radiation sources with different energy levels of radiation employed.
    R
    I /
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    Compiled by S.Aleksanov Editor L.Gratillo Tehred M.Hodannch
    Order 5718/57 Circulation 539Subscription
    VNISh of the USSR State Committee on Affairs, Inventions and Discoveries 113U35, Moscow, Zh-35, Raushsk nab., 4/5
    Manufacturing enterprise; polygraphic enterprise, Uzhgorod, Project St., .4
    Proofreader A. Obruchar
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    引用文献:
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    FR1389417A|1963-04-01|1965-02-19|Commissariat Energie Atomique|Dosing method and devices by applying|
    GB1103591A|1964-02-25|1968-02-21|Nat Res Dev|Improvements in or relating to analysing and/or sorting arrangements|
    AU475297B2|1972-06-09|1976-08-19|Commonwealth Scientific And Industrial Research Organisation|Analysis utilizing neutron irradiation|
    DK134687C|1972-11-22|1977-05-23|Isotopcentralen|
    ZA766086B|1975-10-29|1977-07-27|Atomic Energy Commission|Analysis of coal|
    DE2622175C3|1976-05-19|1982-04-01|Gkss - Forschungszentrum Geesthacht Gmbh, 2000 Hamburg|Method for determining the volume proportions of a three-component mixture|
    GB2039363B|1979-01-12|1983-02-16|Coal Ind|Determining the nature of transported material|
    DE2920364A1|1979-05-19|1980-11-27|Strahlen Umweltforsch Gmbh|Distortion and contact free determn. of foodstuff fat concn. factor - uses irradiation with soft X=ray or gamma rays and measures inelastic and elastic radiation dispersions|
    US4314155A|1979-07-19|1982-02-02|Australian Atomic Energy Commission|Method and apparatus for elemental analysis employing combination of neutron inelastic scattering and γ ray scattering|
    AU546141B2|1979-12-20|1985-08-15|Australian Atomic Energy Commission|Annihilation radiation analysis|FI72211C|1983-03-23|1987-04-13|Outokumpu Oy|FOERFARANDE FOER BEAKTANDE AV STRAOLNINGSBAKGRUNDEN FOER BESTAEMNING AV STRAOLNINGSINTENSITETER SOM UPPSTAOR I KROPPAR SOM SKALL ANALYSERAS.|
    FI67626C|1983-03-23|1985-04-10|Outokumpu Oy|FOERFARANDE FOER ANALYZING AV MALMBLOCK|
    US4916719A|1988-06-07|1990-04-10|Board Of Control Of Michigan Technological University|On-line analysis of ash containing slurries|
    US5506406A|1993-05-17|1996-04-09|Atomic Energy Corporation Of South Africa Ltd.|Method and apparatus for determining the concentration of a heavy element in a rock face|
    AUPN226295A0|1995-04-07|1995-05-04|Technological Resources Pty Limited|A method and an apparatus for analysing a material|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI802882A|FI61361C|1980-09-15|1980-09-15|FRAMEWORK FOR ANALYSIS FOAL ANALYSIS AV MALM MED ANVAENDNING AV GAMMASTRAOLNING|
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