Pratica di Shadowing: What Is Basic Oxygen Furnace - Understanding the basic oxygen process. - Impara a parlare inglese con YouTube

C1
Did you know that the basic oxygen furnace can convert molten iron into steel in just 20 minutes?
⏸ In Pausa
68 frasi
Se le frasi sono troppo corte o troppo lunghe, clicca su Edit per modificarle.
1
Did you know that the basic oxygen furnace can convert molten iron into steel in just 20 minutes?
2
In this video, you will learn in detail about the basic oxygen furnace, a key technology in steel production.
3
Welcome to James Sword Engineering Channel.
4
don't forget to like share comment
5
and also subscribe to the channel the basic oxygen furnace is
6
essentially a giant tank lined with refractory materials to withstand the
7
intense heat the furnace is heated to around 1700 degrees celsius
8
and then oxygen is blown to start the refining process the
9
oxygen reacts with the impurities in the steel such as carbon
10
and silicon to create a slag
11
that is removed from the furnace this leaves behind high quality
12
steel with a much lower carbon content brief history about the
13
basic oxygen furnace in the late 1940s a swiss engineer named robert dur experimented with the bessemer converter process
14
and discovered a better way to produce high quality steel faster
15
he blasted pure oxygen into the furnace instead of air
16
that contains only 20 of oxygen
17
which is used in the bessemer process he found out that oxygen removed carbon from the molten iron more effectively.
18
The process was further developed by an Austrian company called Voest, which is presently known as Voestalpine in the Austrian cities Linz and Donowitz.
19
That is why it can also be called Linz-Donowitz process or LD process.
20
How does the basic oxygen process work in steel making?
21
This steel making process begins with pig iron.
22
The pig iron is smelted in a blast furnace after
23
which it is poured into a ladle and taken to the basic oxygen furnace.
24
In this furnace, The hot metal or pig iron from the blast furnace
25
and steel scraps are charged and loaded into the furnace that is tilted about 45 degrees.
26
The converter is then placed in an upright position.
27
Oxygen is turned on and a water-cooled lance is lowered down into it.
28
The lance blows 99% pure oxygen into the charge for about 20 minutes causing oxidation of the elements.
29
The oxidation reactions in the converter cause temperatures to rise above 1700 degrees Celsius.
30
This melts the scrap and reduces the carbon content of the steel by burning it to form carbon monoxide or carbon dioxide.
31
It also creates silicon oxides and other impurities.
32
To fine-tune the steel characteristics, fluxes such as burnt lime or dolomite are added to form slag, which absorbs impurities of the steelmaking.
33
These adjustments are necessary to achieve the desired quality and ensure the steel meets specific industry standards.
34
The chemical compositions, temperature and charging weight of the iron ore are often controlled automatically by a computer.
35
The tapping process is the final part of the process, where the slag is then separated from the steel.
36
And the refined steel is transferred into the ladles for further processing or subsequent casting.
37
The two major types of basic oxygen furnaces involve these steps.
38
They include a top-blown basic oxygen furnace and a bottom-blown basic oxygen furnace.
39
A top-blown basic oxygen furnace is equipped with a water-cooled oxygen
40
lance for blowing oxygen into the pig iron through four to six nozzles.
41
A bottom-blown oxygen furnace, also known as Q-BOP, is a less common method.
42
Oxygen is injected with lime powder through the two years located at the bottom of the vessel.
43
Various parts of a basic oxygen furnace.
44
The shell, it is the main body of the basic oxygen furnace and it is made from steel.
45
It is strong, durable, and tough the shell does not melt
46
because of the refractory lining the refractory lining the refractory lining is a special type of material
47
that can reflect
48
and withstand heat the refractory lining performs two functions the first is to help retain the heat in the furnace so
49
that less energy is required to keep the furnace at operating
50
temperature the second function is to protect the steel shell from
51
the furnace heat the water cooled oxygen lance the water cooled oxygen lance provides the oxygen to the furnace.
52
The lance is watercooled so that it will not melt in the furnace.
53
The slagging hole.
54
The slagging hole is like a sprout where the slag can be poured out when necessary.
55
The tapping hole.
56
The tapping hole is used to remove the molten steel from the furnace when the desired quality has been attained.
57
The main difference between a basic oxygen furnace and the Bessemer converter is that the basic oxygen furnace uses pure oxygen,
58
while the Bessemer converter uses air, which contains nitrogen that can harm some steel grades.
59
Also, the main difference between a basic oxygen furnace
60
and an electric arc furnace is the type of raw materials they use and the process to create steel.
61
For the raw materials, the basic oxygen furnace uses molten pig iron and recycled steel, while the electric arc furnace uses recycled steel.
62
For the process, in the basic oxygen furnace, oxygen is blown to reduce the carbon content of the molten iron,
63
while an electric arc furnace uses electric arcs to melt the scrap steel.
64
Advantages of basic oxygen furnace.
65
1. Highly efficient.
66
Produces large quantities of steel in a relatively short time compared to other methods.
67
2. Lower operational costs, especially when using molten iron from a blast furnace.
68
3. Can produce a wide range of steel grades, making it suitable for various applications.

Scarica l'app

Everything you need to speak fluently

AI PronunciationScore every sentence
IPA PracticeMaster every sound
VocabularyBuild your word bank
Vocab GameLearn while playing
Scansiona per scaricare
Scansiona per scaricare
Download on theApp Store
Get it onGoogle Play

Informazioni su questa lezione

In questa lezione, imparerai a conoscere il processo del forno a ossigeno basico, un'importante tecnologia nella produzione dell'acciaio. Attraverso questa pratica di conversazione in inglese, esplorerai le fasi del processo di produzione dell'acciaio, la storia del forno e il suo funzionamento. Questa è un'opportunità per migliorare la pronuncia inglese, arricchire il tuo vocabolario e acquisire familiarità con termini tecnici e specifici.

Vocabolario e frasi chiave

  • Fornace a ossigeno basico - Basic Oxygen Furnace
  • Acciaio liquido - Molten steel
  • Ossigeno puro - Pure oxygen
  • Fusione - Smelting
  • Impurità - Impurities
  • Slag - Slag
  • Temperatura - Temperature
  • Fluxo - Flux

Consigli per la pratica

Quando pratichi l'inglese utilizzando il video che discute il forno a ossigeno basico, cerca di seguire un approccio chiamato shadowspeak. Questo metodo consiste nell'imitare il parlatore mentre riproduce il video. Ecco alcuni suggerimenti specifici:

  • Ascolta attentamente: Fai attenzione al modo in cui il presentatore articola le parole e usa le pause.
  • Inizia lentamente: Se il ritmo è troppo veloce, prova a rallentare il video per una migliore comprensione.
  • Ripeti frasi chiave: Focalizzati sulle frasi relative al processo di produzione dell'acciaio e prova a ripeterle esattamente come vengono pronunciate.
  • Scrivi appunti: Annota le nuove parole e gli espressioni che incontri durante il video per facilitarne la memorizzazione.
  • Pratica regolarmente: Integra questa lezione nella tua routine per migliorare la tua abilità di parlare e comprendere l'inglese tecnico.

Utilizzando questi consigli, potrai non solo arricchire il tuo vocabolario tecnico, ma anche migliorare la tua pronuncia inglese e diventare più sicuro nel parlare di argomenti specializzati. Non dimenticare di continuare a imparare l'inglese con YouTube per sfruttare al massimo ogni opportunità di apprendimento.

Cos'è la tecnica dello Shadowing?

Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.

☕ Offrici un caffè