Oporaba topline od čeličanskih troski

undergraduate thesis

• Title (english): Heat recovery from steel slags
• Author: Toni Marić
• Mentor: Ivan Brnardić (mentor)
• Mentor: Igor Jajčinović (pomoć pri izradi, neposredni voditelj)
• Committee member: Tamara Holjevac Grgurić (predsjednik povjerenstva)
• Committee member: Ivan Brnardić (član povjerenstva)
• Committee member: Stjepan Kožuh (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2018-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Danas se čelik najčešće dobiva elektrolučnim postupkom i putem kisikovih konvertera
gdje kao nusproizvod nastaje troska. Troska nastaje tijekom taljenja metala te zbog manje
gustoće od rastaljenog metala, pliva na površini te zaštićuje rastaljeni metal od oksidacije.
Prosječno po toni čelika nastaje 100 kg troske s temperaturom od oko 1650 °C te uzevši u
obzir da se godišnje proizvodi 1.500 milijuna tona čelika u svijetu danas se sve više istražuju
načini iskorištenja topline troske.
Prijašnjih godina, troska se odlagala na tlo ili jame gdje se hladila i skrućivala bez
pokušaja da se iskoristi njezina toplina. U ovom radu opisan je proces proizvodnje čelika
elekrolučnim postupkom i putem kisikovih konvertera te je dan pregled mogućih postupaka
oporabe topline od nastale troske. Do današnjeg dana razvijeno je nekoliko različitih tipova
uređaja za iskorištavanje topline koji se temelje na oporabi topline granuliranjem te kemijsko
faznim promjenama.

Abstract (english)

Today, steel is most often produced by electric arc furnace process and through
oxygen converters, where slag is one of the major byproduct. The slag is a formed during the
melting of metals and because of its less dense than of molten metal, it floats on the surface
and protects the molten metal from oxidation. An average of 100 kg of slags per ton of steel
with a temperature of around 1650 ° C is generated, and considering that 1.500 million tons of
steel is products annually in the world, today more and more ways of using heat from the slag
are explored.
In recent years, the slag was landed on the ground or pit where it was cooled and
solidified without trying to reuse its heat. In this paper the process of steel production by
electric arc furnace process and through oxygen converters, as well as possible heat recovery
processes from the high temperature slag were described. To date, several different heat
recovery method have been developed, which are divided into heat recovery processes by
granulation and based on chemical phase transformations.

• Keywords: proizvodnja čelika; troska; oporaba topline
• Keywords (english): steel production; slag; heat recovery
• Language: croatian
• URN:NBN: urn:nbn:hr:115:847154
• Study programme: Title: Metallurgy; specializations in: Metallurgical Engineering, Industrial Ecology; Course: Industrial Ecology; 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: 2018-10-01 11:09:17