Prednosti primjene gorionika novije generacije u elektrolučnoj peći

master's thesis

• Title (english): Advantages of the new generation burner in the electric arc furnace
• Author: Dorian Dervić
• Mentor: Ivan Brnardić (mentor)
• Mentor: Martina Lovrenić-Jugović (komentor)
• Committee member: Zoran Glavaš (predsjednik povjerenstva)
• Committee member: Ivan Brnardić (član povjerenstva)
• Committee member: Martina Lovrenić-Jugović (član povjerenstva)
• Committee member: Damir Hršak (član povjerenstva)
• Committee member: Anita Begić Hadžipašić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2021-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Čelik kao materijal s obzirom na svoja svojstva ima široku primjenu u svijetu. S obzirom da su za dobivanje čelika potrebne visoke temperature proces dobivanja je skup i zahtjevan. Danas je elektrolučni postupak dobivanja čelika jedan od najzastupljenijih u svijetu, stoga je bitno daljnje unaprjeđenje procesa s ciljem što bolje učinkovitosti te s time i smanjenje troškova i utjecaja na okoliš. Jedan od velikih problema je remont vatrostalnog dijela peći gdje nastaju velike količine istrošenog vatrostalnog materijala, koji je sam po sebi skup i opterećuje okoliš. Isto tako mora se istaknuti da svako zaustavljanje procesa za remont zaustavlja proizvodnju.
U ovome radu je istražen utjecaj dva različita načina dodavanja CaO i MgO vapna u elektrolučnu peć naproces dobivanja čelika. Jedan od načina je dodavanje CaO i MgO vapna u košaru zajedno s uloškom, tj. čeličnim otpadom, a drugi upuhivanjemMgO korištenjem nove generacije gorionika direktno u talinu. Praćena je potrošnja materijala, kemijski sastav troske te vrijeme između remonta vatrostalnog obzida peći. Rezultati su ukazali da se korištenjem novije generacije gorionika supuhivanjemMgO vapna direktno u talinu doprinosi značajnom povećanju broja pripravljenih talina u elektrolučnoj peći između dvaju remonta te je dobiven i različit kemijski sastav troske.

Abstract (english)

Steel as a material due to its properties has a wide application in the world. Since high temperatures are required for steel production, the production process is an expensive and demanding. Today, the electric arc furnace process for steel production is one of the most common in the world, so it is important to further improve the process with the aim of better efficiency and thus reduce costs and environmental impact. One of the big problems is the overhaul of the refractory part of the furnace, where large quantities of spent refractory material are created, which in itself is expensive and burdens the environment. It must also be pointed out that any stoppage for the overhaul process stops production.
In this paper, the influence of two different ways of adding CaO and MgO lime to an electric arc furnace on the steel production process was investigated. One way is to add CaO and MgO lime to the basket together with the cartridge, i.e. steel scrap, and the other is to blow MgO using a new generation of burners directly into the melt. The consumption of materials, the chemical composition of slag and the time between repairs of the refractory wall of the furnace were monitored. The results indicated that the use of a newer generation of burners for blowing MgO lime directly into the melt contributes to a significant increase in the number of prepared melts in the electric arc furnace between two overhauls, and a different chemical composition of slag was obtained.

• Keywords: čelik; elektrolučna peć; gorionik; MgO vapno; remont
• Keywords (english): steel; electric arc furnace; burner; MgO lime; overhaul
• Language: croatian
• URN:NBN: urn:nbn:hr:115:310891
• Study programme: Title: Graduate study program Metallurgy; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka metalurgije (magistar/magistra inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2021-07-22 11:06:38