FR2271880A1 - High speed sorting of iron ores - using radioactive source to produce X-ray fluorescence due to iron and calcium - Google Patents

High speed sorting of iron ores - using radioactive source to produce X-ray fluorescence due to iron and calcium

Info

Publication number
FR2271880A1
FR2271880A1 FR7417779A FR7417779A FR2271880A1 FR 2271880 A1 FR2271880 A1 FR 2271880A1 FR 7417779 A FR7417779 A FR 7417779A FR 7417779 A FR7417779 A FR 7417779A FR 2271880 A1 FR2271880 A1 FR 2271880A1
Authority
FR
France
Prior art keywords
iron
lumps
ray fluorescence
ore
signal
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR7417779A
Other languages
French (fr)
Other versions
FR2271880B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to FR7417779A priority Critical patent/FR2271880A1/en
Publication of FR2271880A1 publication Critical patent/FR2271880A1/en
Application granted granted Critical
Publication of FR2271880B1 publication Critical patent/FR2271880B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/346—Sorting according to other particular properties according to radioactive properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/07—Investigating materials by wave or particle radiation secondary emission
    • G01N2223/076—X-ray fluorescence

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Ore is sorted after crushing, by process in which lumps of ore are fed past a source of electromagnetic radiation to obtain the emission of X-ray fluorescence with a wavelength characteristic of one constituent (I) of the ore, and a wavelength characteristic of one constituent (I) of the ore, and a wavelength characteristic of a second constituent (II), so a signal is produced which represents the ratio of the intensities of the two radiations; the signal is compared with a threshold value and the material is sepd. into lumps giving high signal and lumps with a low signal. The process is pref. used for the enrichment of iron ores where (I) is Fe and (II) is Ca, the Fe providing the low signal. The process is pref. used for the enrichment of iron ores where (Ie is Fe and (II) is Ca, the Fe providing the low signal. The X-ray fluorescence radiation used is pref. K alpha for Fe and K alpha for Ca. Method is applicable to lumps with average size 50-150 mm at a speed of 10 lumps/second.
FR7417779A 1974-05-22 1974-05-22 High speed sorting of iron ores - using radioactive source to produce X-ray fluorescence due to iron and calcium Granted FR2271880A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7417779A FR2271880A1 (en) 1974-05-22 1974-05-22 High speed sorting of iron ores - using radioactive source to produce X-ray fluorescence due to iron and calcium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7417779A FR2271880A1 (en) 1974-05-22 1974-05-22 High speed sorting of iron ores - using radioactive source to produce X-ray fluorescence due to iron and calcium

Publications (2)

Publication Number Publication Date
FR2271880A1 true FR2271880A1 (en) 1975-12-19
FR2271880B1 FR2271880B1 (en) 1977-03-11

Family

ID=9139153

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7417779A Granted FR2271880A1 (en) 1974-05-22 1974-05-22 High speed sorting of iron ores - using radioactive source to produce X-ray fluorescence due to iron and calcium

Country Status (1)

Country Link
FR (1) FR2271880A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001837A1 (en) * 1979-02-26 1980-09-04 Luossavaara Kiirunavaara Ab Process for sorting coarse-to-fine material according to the chemical composition thereof
US4275298A (en) * 1977-05-31 1981-06-23 Coal Industry (Patents) Limited Method of and apparatus for determining the proportion of at least one material in a moving mixture of materials
EP0074447A1 (en) * 1981-09-15 1983-03-23 Resource Recovery Limited Apparatus and method for sorting articles
EP0096092A1 (en) * 1982-06-07 1983-12-21 Klaus Prof. Dipl.-Ing. Sczimarowski Device for sorting metal pieces

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425143A (en) 1978-12-29 1984-01-10 Shin Tohoku Chemical Industries Inc. Adsorption by zeolitic composition

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275298A (en) * 1977-05-31 1981-06-23 Coal Industry (Patents) Limited Method of and apparatus for determining the proportion of at least one material in a moving mixture of materials
WO1980001837A1 (en) * 1979-02-26 1980-09-04 Luossavaara Kiirunavaara Ab Process for sorting coarse-to-fine material according to the chemical composition thereof
US4441616A (en) * 1979-02-26 1984-04-10 International Business Machines Corporation Process for sorting coarse to fine materials according to their chemical composition
EP0074447A1 (en) * 1981-09-15 1983-03-23 Resource Recovery Limited Apparatus and method for sorting articles
EP0096092A1 (en) * 1982-06-07 1983-12-21 Klaus Prof. Dipl.-Ing. Sczimarowski Device for sorting metal pieces

Also Published As

Publication number Publication date
FR2271880B1 (en) 1977-03-11

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Legal Events

Date Code Title Description
ST Notification of lapse