SVIBOR - Project code: 1-07-071

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 1-07-071


THE STUDY OF SEPARATION AND ANALYSIS, AND OF THE STRUCTURE AND PROPERTIES OF MATTER


Main researcher: MALJKOVIĆ, DARKO (27750)


Assistants
Type of research: basic
Duration from: 01/01/91. to 12/31/93.
Papers on project (total): 131
Papers on project quoted in Current Contents: 9
Institution name: Metalurški fakultet, Sisak (124)
Department/Institute: Materials Science Department
Address: Aleja narodnih heroja 3
City: 44000 - Sisak, Croatia
Communication
Fax: 385 (0)44 32961
Phone: 385 (0)44 32961
Phone: 385 (0)44 32044
Phone: 385 (0)44 32756
E-mail: maljkovic@olimp.irb.hr
Summary: In the framework of the investigation of separation solvent extraction of metals with diisopropyl ether (Fe, Ga, Au) and the commercial extractant Cyanex 272 (Co, Ni) is studied. Special attention is paid to the systems forming the third liquid phase. Connected with solvent extraction the leaching of real samples ore, used hard metals) is also investigated. Owing to improvement of phase/element detectability the influence of sample preparation on the results of X-ray emission spectrometry is examined. Radiolytical changes in real and model samples prepared with different binders are also investigated. The content of trace metals and their phase composition as well as the microstructure of ideal and real carbon materials is determined depending on time and temperature of calcination and graphitation. Two- and three-component systems of transition elements in combination with metaloids from the IV, V and VI groups of the periodical system are studied and their equilibrium diagrams are investigated.

Keywords: solvent extraction, diisopropyl ether, mixed solvents, Cyanex 272, synergistic effect, third phase, leaching, cobalt, chlorometallic complex acids, sample ageing, sample preparation, X-ray diffraction analysis, X-ray emission analysis, constitution of alloys, phase transformations, intermetallic compounds, carbon materials, coal tar pitch, coke, metallic microconstituents

Research goals: Goal of the investigation, generally, is development of new procedures for the separation, identification and preparation of technologicallyimportant materials. With this aim in wiew the following is expected from the results of investigation: -Improvement of the processes of leaching and solvent extraction of valuable metals (e.g. Co, Au) and better possibilities of their recovery from poor sources and waste. - Contribution to cognitions about complex non-ideal extraction systems where third liquid phase appears, which are very sensitive to small temperature changes or show enhancement of extraction (synergistic effect) under defined conditions. - Improvement of the procedures of sampling, sample preparation and sample treatment and accordingly, achievement of better reliability and accuracy of analysis by X-ray emission spectrometry of metals, non-metals and technologically important materials. - Determination of detectability of phase/element in polycrystallinic samples by X-ray diffraction and X-ray emission spectrometry. - New cognitions about the mechanism or segregation of metal constituents during the graphitation process which are very important for application of petroleum, metallurgical and peach cokes as raw materials in graphite production. - New cognitions about phase transformations and the structure of alloys as a result of investigations of equilibrium diagrams of metals. - Development of methods as well as preparation of materials of special selected microstructural properties.

COOPERATION - INSTITUTIONS


  1. Name of institution: Istraživanje-razvoj-ispitivanje, Holding Željezara Sisak
    Type of institution: Non-profit
    City: 44000 - Sisak, Croatia

OTHER ACHIEVEMENTS


  1. Name: Aparatura za određivanje karboksi-reaktivnosti ugljičnih anoda
    Type of achievement: Instrumentation
    Authors: Ljuckanov Marin,dipl. inž., Legin-Kolar dr Mira

  2. Name: Aparatura za odredjivanje mehaničke otpornosti briketiranih uzoraka
    Type of achievement: Prototypes
    Authors: Ljuckanov Marin, dipl. inž., Novosel-Radović dr Vjera, Maljković dr Darko

  3. Name: Laboratorijska lučna peć
    Type of achievement: Prototypes
    Authors: Matković Prošper,dr.sc.,Matković Tanja, dr.sc.
Other information about the project.
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Last update: 10/16/95
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