Metallurgische Aufarbeitung von Rückständen aus dem Erz-Bergbau

Translated title of the contribution: Metallurgical treatment of mining residues

Helmut Paulitsch

Research output: ThesisMaster's Thesis

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Abstract

Ferrotitanium and titanium can be produced with different processes. In this diploma thesis, the most important methods are mentioned. Titanium is a very important component for the production of steel. The affinity for intercrystalline corrosion is lowered and the tensile strength increases. Titanium is added in form of ferrotitanium into the molten metal. Examples for the application of titanium are turbine blades, jewellery, implants, handy bodies and superconductor alloys. The raw materials for the production of titanium and ferrotitanium are natural occurring ores or slags which are rich in titanium. For the fabrication of titanium tetrachloride rutile, brookite and anatase are used. Ilmenite is the primary material for the production of titanium rich slags. To increase the titanium content, the ilmenite is reduced at different processes where a titanium rich slag and crude iron are generated. The titanium content of the oxidic phase depends on the feedstock. It is possible to reduce the TiO2 to titanium oxides with lower valence at high temperatures with some reducing agents like carbon monoxide, hydrogen and ammoniac. There is no reduction to metallic titanium possible. Titanium dioxide reacts with gaseous chlorine, when carbon is attendant. This is an important fact for the chlorination process. Titanium dioxide is also used for the production of pigments. At this work some experiments are realised with carbon and hydrogen as reducing agent. The investigations were performed at the department of nonferrous metallurgy at the University of Leoben. The aim of the experiments is to separate the iron and increase the titanium content in a different phase. In following processing steps, metallic titanium or pure titanium dioxide are produced with the titanium rich phase as a raw material. A lot of preliminary tests are realised to determine the behaviour of titanium at higher temperatures with different reduction agents. An induction furnace and a tube furnace are used for the main experiments. The reduced metal and the slag have been analysed with XRF- and REM- analyses. After this the results have been interpreted.
Translated title of the contributionMetallurgical treatment of mining residues
Original languageGerman
QualificationDipl.-Ing.
Supervisors/Advisors
  • Antrekowitsch, Helmut, Supervisor (internal)
  • Konetschnik, Stefan, Co-Supervisor (internal)
Award date18 Dec 2009
Publication statusPublished - 2009

Bibliographical note

embargoed until null

Keywords

  • ferrotitanium titanium production titanium-rich slag reduction with hydrogen iron sand sponge titanium titanium tetrachloride Ilmenite aluminothermic carbothermic XRD XRF HSC FactSage smelting microscope REM DSC residue ore iron ore

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