SVIBOR - Project code: 2-15-044

MINISTRY OF SCIENCE AND TECHNOLOGY

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Project code: 2-15-044

RESEARCH AND DEVELOPMENT OF THE SERPENTINITE VALORIZATION PROCESES

Main researcher: ĆOSIĆ, MILOMIR (74254)

Assistants

ŽULJEVIĆ-ŠIPALO, JOSIP (47030)
HRŠAK, DAMIR (900667)

Type of research: applied
Duration from: 01/01/91. to 12/31/94.

Papers on project (total): 13

Institution name: Metalurški fakultet, Sisak (124)
Department/Institute: Department of Materials
Address: Aleja narodnih heroja 3
City: 44000 - Sisak, Croatia

Communication: Phone: 385 (0)44 32-961; Fax: 385 (0)44 32-961; E-mail: mcosic aOLIMP.IRB.HR

Summary: The decomposition of serpentinite by HCl leaching. Optimal leaching conditions. The precipitated SiO2 and SiO2 gel. The admixtures separation from SiO2. The properties of amorphous SiO2 powder. The admixtures separation from MgCl2 solution using controlled precipitation of low solubility hydroxides and oxyhydroxides, pH increse is caused by the dissolution of added MgO. The separation of FeOOH(Fe2O3) and nickel - cobalt concentrates. The production of nickel and cobalt metal powder from the concentrate and their characterization. Kinetics and mechanism of thermal decay of MgCl2. The properties of the prepared MgO. Thermal decay of serpentinite contained serpentine to yield free oxides. The leaching of the suspension of thermaly treated serpentinite using pressurized CO2 and the separation of hydraded magnesium carbonates from the pregnant Mg(HCO3)2 solution. The properties of MgO prepared from this carbonates. The consolidation of varios MgO forms. Kinetics and mechanism of MgO sintering.

Keywords: Serpentinite, Thermical Treatment, Fluidizied Bed, Leaching, Obtaining, Amorphous Silica, Nickel, Cobalt, Magnesium Oxide, Powder, Sintering.

Research goals: The purpuse of the proposed research is : - to establish the optimal conditions of the serpentinite contained serpentine decay, - the preparation of disperse and active MgO, SiO2 (amorphous), FeOOH(Fe2O3), Ni and Co high grade purity powders, - characterization of the prepared powders and their industrial application in new materials formulation and - the study of MgO sintering. It was supposed that the proposed research would offer scientific contribution to the knowledge of the serpentine decay mechanism and the one of MgO sintering. Taking into consideration the cognitions and the data which are expected to be find experimentaly and by literature search, the processes enabling to extract: 360 kg MgO, 380 kg SiO2, 80 kg Fe2O3, 3-4 kg Ni i 0,15-0,20 kg Co from 1t serpentinite will be given.

COOPERATION - INSTITUTIONS

Name of institution: Tehnološko metalurški fakultet, Univerzitet "Kiril i Metodij"
Type of institution: University/Faculty
Type of cooperation: Joint publishing of scientific papers
City: Skopje, R Makedonija

OTHER ACHIEVEMENTS

Name: Postupak dobivanja disperznog i aktivnog oblika MgO direktno iz serpentinita
Type of achievement: Technology
Authors: Milomir Ćosić
Name: Postupak dobivanja čistog MgO, amorfnog SiO2 i koncentrata primjesa i pratećih elemenata iz serpentinita s visokim sadržajem serpentina izluživanjem kloridnom kiselinom
Type of achievement: Technology
Authors: Milomir Ćosić
Name: Postupak toplinske razgradnje serpentinita radi dobivanja amorfnih i reaktivnih slobodnih oksida
Type of achievement: Technology
Authors: Milomir Ćosić

Other information about the project.


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Last update: 08/16/95
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