WO1997012222A2 - Procede et systeme permettant de determiner les dimensions geometriques de particules d'un materiau sous forme de boulettes et/ou de granules - Google Patents

Procede et systeme permettant de determiner les dimensions geometriques de particules d'un materiau sous forme de boulettes et/ou de granules Download PDF

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Publication number
WO1997012222A2
WO1997012222A2 PCT/DE1996/001810 DE9601810W WO9712222A2 WO 1997012222 A2 WO1997012222 A2 WO 1997012222A2 DE 9601810 W DE9601810 W DE 9601810W WO 9712222 A2 WO9712222 A2 WO 9712222A2
Authority
WO
WIPO (PCT)
Prior art keywords
granulated material
particles
pelletized
geometric dimensions
determining
Prior art date
Application number
PCT/DE1996/001810
Other languages
German (de)
English (en)
Other versions
WO1997012222A3 (fr
Inventor
Wladimir Lissijenko
Wassilij Kruglow
Dmitrij Kirin
Original Assignee
Siemens Aktiengesellschaft
Npwp Toreks
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft, Npwp Toreks filed Critical Siemens Aktiengesellschaft
Priority to AU76190/96A priority Critical patent/AU702574B2/en
Priority to DE19680817T priority patent/DE19680817B4/de
Publication of WO1997012222A2 publication Critical patent/WO1997012222A2/fr
Publication of WO1997012222A3 publication Critical patent/WO1997012222A3/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means
    • G01N15/0227—Investigating particle size or size distribution by optical means using imaging; using holography

Definitions

  • the invention relates to a method for determining the geometric dimensions of particles, for. B. pellets, granules, stones or grains, and a granularity measuring system for performing this method.
  • the object of the invention is to provide a method for determining the geometric dimensions of particles of a pelletized and / or granulated material and a granularity measuring system for carrying out this method, the precision of which is higher than that of the known methods and measuring devices. It is desirable that the new method or the granularity measurement system for carrying out this method allows the geometric dimensions of the particles of the pelleted and / or granulated material to be determined.
  • the object is achieved according to the invention by a method for determining the geometrical dimensions of particles of a pelletized and / or granulated material which is exposed to and reflects radiation such as electromagnetic radiation, sound or the like, the intensity distribution of the reflected ones Radiation measured and from this the geometric dimensions of the particles of the pelleted and / or granulated material are determined. It has been found that the evaluation of an intensity distribution of the reflected radiation allows a particularly precise determination of the geometric dimension of the particles of the pelletized and / or granulated material compared to the known prior art.
  • the two-dimensional intensity distribution of the reflected radiation is measured and from this the geometric dimensions of the particles of a pelletized and / or granulated material are determined, whereby the precision of the method according to the invention can be further increased.
  • the radiation is light. It has been shown that light is suitable for generating intensity contrasts in accordance with the geometric properties of particles of a pelletized and / or granulated material.
  • the pelletized and / or granulated material is irradiated in a directed manner, as a result of which the intensity of the reflected radiation is increased. An increased intensity of the reflected radiation also increases the contrasts of the intensity distribution.
  • the pelletized and / or granulated material is irradiated from at least three directions, preferably with radiation sources uniformly distributed over a circumference, which leads to a particularly high-contrast intensity distribution, which results in the geometric structures of the pelletizing particles th and / or granulated material represents.
  • the intensity maxima and minima and their distance from one another are determined in the intensity distribution of the reflected radiation.
  • the distance between intensity maxima and minima is a size which is particularly suitable for representing the geometrical dimensions of particles of a pelletized and / or granulated material. It has proven to be particularly advantageous to determine the distance between intensity maxima and minima in eight to sixteen directions, the directions advantageously all being at the same angle to one another.
  • the number of eight to sixteen directions has proven to be a particularly suitable compromise between the requirement for measurement in a few directions in order to minimize the computation effort and the requirement in a particularly large number of directions in order to obtain the most precise possible image of the particles , proven.
  • a frequency distribution is determined from the intervals between intensity maxima and minima.
  • a frequency distribution is a particularly suitable parameter for characterizing the geometric dimensions of a pelletized and / or granulated material, since the information about the geometric dimensions of individual parts is of little significance and is therefore not particularly suitable as a controlled variable.
  • This granularity measuring system has at least one radiation measuring device, at least radiation source and at least one evaluation unit.
  • a radiation measuring device is designed as a camera and a radiation source as a light source.
  • the combination of light source and camera has proven to be particularly advantageous.
  • FIG. 2 shows a two-dimensional intensity distribution.
  • FIG. 3 shows the intensity distribution along the section line A, B from FIG. 2
  • FIG. 4 shows the evaluation of the intensity distribution.
  • FIG. 5 shows a measurement and radiation arrangement
  • the pelletizing plant 1 shows a pelletizing plant 1 for iron ore.
  • the mixture of iron ore and bentonite to be pelletized is conveyed onto a pellet conveyor via a conveyor belt 5 and a material store 6 animal plate 7 given.
  • the pelletized material is transported away via a further conveyor belt 8.
  • the pelletizing plates 7 are controlled and regulated by a programmable logic controller 4 (PLC).
  • PLC programmable logic controller 4
  • the aim of this control and regulation is to obtain pellets of the iron ore-bentonite mixture of a certain size.
  • the pellet size is measured with a measuring unit 2. This measurement can take place either when the pellets fall on the conveyor belt 8 or when they lie on the conveyor belt 8.
  • the measuring unit 2 consists of, preferably three, electromagnetic radiation sources evenly distributed on a circle and a camera.
  • the image supplied by the camera is processed and transmitted via a data line 3 to a PC, in particular an industrial PC 4.
  • This transmitted signal is evaluated in the PC 4, so that information about the size distribution of the pellets can be determined there, which is necessary for the control of the pelletizing plates 7.
  • PC programmable logic controllers or VME bus systems can also be used.
  • the pellets stand out as areas of higher light intensity 9. Due to the curved surface of the pellets, multi-dimensional radiation, e.g. B. by irradiation with three light sources arranged uniformly on a circumference, a different reflection of the individual areas of a pellet. This means that light is reflected more from the center of the pellet than from the edges.
  • multi-dimensional radiation e.g. B. by irradiation with three light sources arranged uniformly on a circumference, a different reflection of the individual areas of a pellet. This means that light is reflected more from the center of the pellet than from the edges.
  • FIG. 3 shows the intensity distribution along the section line A, B from FIG. 2.
  • This intensity distribution has minima 12 and maxima 11.
  • the distance between a maximum 11 and its two adjacent minima 12 is proportional to the physical expansion of the assigned pellet along the section line A, B.
  • 4 shows the evaluation of the intensity distribution.
  • the image 14 supplied by a camera is first digitized in a digital converter 15.
  • the output signal of the digital converter 15 is fed to a low-frequency filter 16 and an intensity maximum detector 17.
  • the signals supplied by the low-frequency filter 16 and the intensity maximum detector 17 are further processed in a gradation amplifier 18 to emphasize the intensity distribution representing the geometrical gradations.
  • Its output signal is in turn fed into a function module 19 for pellet dimension calculation.
  • the information obtained in this way is finally evaluated in a statistics module 20 for statistical processing of the information supplied by the function module 19 for calculating the pellet dimensions.
  • the output signal 21 of the statistics module 20 is a distribution of the frequency of pellets of different sizes.
  • FIG. 5 shows an embodiment for a particularly inexpensive measuring and radiation arrangement.
  • Three light sources 15 are evenly distributed on a circumference 16.
  • a camera 14, which is arranged in the center of the circle, is used to measure the radiation reflected by the irradiated material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un procédé permettant de déterminer les dimensions géométriques de particules, par ex. de boulettes, de granulés, de pierres ou de grains, d'un matériau sous forme de boulettes et/ou de granulés. Ce matériau est soumis à l'action d'un rayonnement, tel qu'un rayonnement électromagnétique, acoustique ou similaire, qu'il réfléchit. La répartition de l'intensité du rayonnement réfléchi est mesurée et les résultats obtenus permettent de déterminer les dimensions géométriques des particules du matériau sous forme de boulettes et/ou de granulés.
PCT/DE1996/001810 1995-09-28 1996-09-24 Procede et systeme permettant de determiner les dimensions geometriques de particules d'un materiau sous forme de boulettes et/ou de granules WO1997012222A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU76190/96A AU702574B2 (en) 1995-09-28 1996-09-24 Method and system for determining the geometric dimensions of particles of a pelletized and/or granulated material
DE19680817T DE19680817B4 (de) 1995-09-28 1996-09-24 Verfahren und Vorrichtung zur Bestimmung der geometrischen Abmessungen von Teilchen eines pelletierten und/oder granulierten Materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19536238.1 1995-09-28
DE19536238 1995-09-28

Publications (2)

Publication Number Publication Date
WO1997012222A2 true WO1997012222A2 (fr) 1997-04-03
WO1997012222A3 WO1997012222A3 (fr) 1997-06-05

Family

ID=7773524

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001810 WO1997012222A2 (fr) 1995-09-28 1996-09-24 Procede et systeme permettant de determiner les dimensions geometriques de particules d'un materiau sous forme de boulettes et/ou de granules

Country Status (4)

Country Link
AU (1) AU702574B2 (fr)
DE (1) DE19680817B4 (fr)
RU (1) RU2154814C2 (fr)
WO (1) WO1997012222A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778243A1 (fr) * 1998-04-29 1999-11-05 Cilas Dispositif pour determiner la repartition granulometrique d'un melange de particules
RU2677209C1 (ru) * 2017-07-27 2019-01-15 Федеральное казенное предприятие "Государственный научно-исследовательский институт химических продуктов" (ФКП "ГосНИИХП") Способ оценки качества измельчения нитратов целлюлозы

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9010543B2 (en) 2010-06-02 2015-04-21 Technological Resources Pty. Limited Separating mined material
RU2508534C1 (ru) * 2012-08-13 2014-02-27 Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук Устройство для измерения геометрического размера диэлектрической частицы
RU2557330C2 (ru) * 2013-03-19 2015-07-20 Василий Николаевич Круглов Способ определения геометрических размеров частиц окомкованного и/или гранулированного материала в насыпном слое
RU2626381C1 (ru) * 2016-09-26 2017-07-26 федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный авиационный технический университет" Система гранулометрического анализа жидких дисперсных сред

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2012948A (en) * 1977-12-29 1979-08-01 Sumitomo Metal Ind Investigation of Particle Size Distribution
US4283953A (en) * 1978-10-30 1981-08-18 Schlumberger Technology Corporation Method and apparatus for determining a granularity property of a subsurface formation around a borehole
EP0198670A2 (fr) * 1985-04-11 1986-10-22 Nippon Steel Corporation Mesure de la taille de particules tombantes
EP0391530B1 (fr) * 1989-04-05 1995-05-24 Nkk Corporation Méthode de mesure de la taille moyenne de particules dans un matériau en grains
WO1995025273A1 (fr) * 1994-03-17 1995-09-21 Agrovision Ab Appareils et methodes d'evaluation automatique des grains de cereales
DE4414622A1 (de) * 1994-04-18 1995-10-19 Marcus Dipl Ing Gutzmer Verfahren und Vorrichtung zur Bestimmung von Fremdstoffen in körnigen Medien

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759143A (en) * 1980-09-26 1982-04-09 Nippon Kokan Kk <Nkk> Measuring method for grain size of granular material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2012948A (en) * 1977-12-29 1979-08-01 Sumitomo Metal Ind Investigation of Particle Size Distribution
US4283953A (en) * 1978-10-30 1981-08-18 Schlumberger Technology Corporation Method and apparatus for determining a granularity property of a subsurface formation around a borehole
EP0198670A2 (fr) * 1985-04-11 1986-10-22 Nippon Steel Corporation Mesure de la taille de particules tombantes
EP0391530B1 (fr) * 1989-04-05 1995-05-24 Nkk Corporation Méthode de mesure de la taille moyenne de particules dans un matériau en grains
WO1995025273A1 (fr) * 1994-03-17 1995-09-21 Agrovision Ab Appareils et methodes d'evaluation automatique des grains de cereales
DE4414622A1 (de) * 1994-04-18 1995-10-19 Marcus Dipl Ing Gutzmer Verfahren und Vorrichtung zur Bestimmung von Fremdstoffen in körnigen Medien

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 137 (P-130), 24.Juli 1982 & JP 57 059143 A (NIPPON KOKAN KK), 9.April 1982, *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778243A1 (fr) * 1998-04-29 1999-11-05 Cilas Dispositif pour determiner la repartition granulometrique d'un melange de particules
RU2677209C1 (ru) * 2017-07-27 2019-01-15 Федеральное казенное предприятие "Государственный научно-исследовательский институт химических продуктов" (ФКП "ГосНИИХП") Способ оценки качества измельчения нитратов целлюлозы

Also Published As

Publication number Publication date
WO1997012222A3 (fr) 1997-06-05
AU702574B2 (en) 1999-02-25
AU7619096A (en) 1997-04-17
DE19680817B4 (de) 2011-12-08
RU2154814C2 (ru) 2000-08-20
DE19680817D2 (de) 1998-07-23

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