Alternativni načini proizvodnje aluminija

undergraduate thesis

• Title (english): Alternative methods of aluminium production
• Author: Ana-Marija Hirš
• Mentor: Natalija Dolić (mentor)
• Committee member: Ankica Rađenović (predsjednik povjerenstva)
• Committee member: Natalija Dolić (član povjerenstva)
• Committee member: Damir Hršak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2017-09-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

U ovom radu dan je pregled alternativnih načina i procesa proizvodnje aluminija. HallHéroultov proces elektrolitičke redukcije glinice razvijen je krajem 19. stoljeća te je još uvijek jedini industrijski proces za proizvodnju aluminija. Svrstan je među energetski najintenzivnije procese i najveće proizvođače CO2. Čak 1 % od ukupne svjetske električne energije troši se na ovaj proces koji ukupnoj svjetskoj emisiji stakleničkih plinova pridonosi s 2,5 %. Kao alternativni procesi predloženi su procesi: direktna karbotermijska redukcija glinice, karbotermijska redukcija pod vakuumom i inertnim plinom, indirektna karbotermijska redukcija te redukcija kaolinita. Svaki od ovih procesa pokazuje izrazit potencijal smanjenja potrošnje energije i emisije štetnih plinova. Međutim, javljaju se određeni problemi koji sprječavaju njihovo uvođenje u industriju (mali izvadak aluminija i previsok udio karbida u aluminiju). Zamjenom HallHeroultovih ugljičnih anoda inertnim anodama, uvođenjem močivih katoda te multipolarnih ćelija troškovi HallHeroultovog procesa znatno bi se smanjili, a proces bi postao prihvatljiviji za okoliš.

Abstract (english)

This paper gives an overview of alternative methods and processes for aluminium production.
The Hall-Héroult process for the electrolytic reduction of alumina was developed at the end of
the 19th century and is still currently the only industrial process for the production of
aluminium. Today this process is ranked among the most energy and CO2 intensive industrial
processes. About 1 % of the globally produced electric energy is consumed by this process
which produces 2.5 % of the World’s anthropogenetic greenhouse gases. Proposed alternative
processes include: direct carbothermic reduction of alumina, carbothermic reduction under
vacuum or inert gas conditions, indirect carbothermic reduction and kaolinite reduction. Every
one of those processes shows distinct potential to reduce energy consumption and greenhouse
gas emissions. However, there are certain problems that hinder their implementation in
industry (low yield and very high carbon content in the product). By replacing Hall Heroult
carbon anodes with inert anodes, wetted cathodes and multipolar cells costs of Hall Heroult
process would decrease considerably and process would become more environmentally
friendly.

• Keywords: aluminij; HallHeroultov proces; alternativni načini proizvodnje aluminija; prednosti i nedostaci
• Keywords (english): aluminium; Hall Heroult process; alternative methods of aluminium production; advantages and disadvantages
• Language: croatian
• URN:NBN: urn:nbn:hr:115:074155
• Study programme: Title: Metallurgy; specializations in: Metallurgical Engineering, Industrial Ecology; Course: Metallurgical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-10-20 07:39:16