跟讀練習: What Is Basic Oxygen Furnace - Understanding the basic oxygen process. - 通過影片學習英語口語
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Did you know that the basic oxygen furnace can convert molten iron into steel in just 20 minutes?
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In this video, you will learn in detail about the basic oxygen furnace, a key technology in steel production.
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Welcome to James Sword Engineering Channel.
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don't forget to like share comment
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and also subscribe to the channel the basic oxygen furnace is
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essentially a giant tank lined with refractory materials to withstand the
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intense heat the furnace is heated to around 1700 degrees celsius
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and then oxygen is blown to start the refining process the
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oxygen reacts with the impurities in the steel such as carbon
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and silicon to create a slag
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that is removed from the furnace this leaves behind high quality
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steel with a much lower carbon content brief history about the
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basic oxygen furnace in the late 1940s a swiss engineer named robert dur experimented with the bessemer converter process
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and discovered a better way to produce high quality steel faster
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he blasted pure oxygen into the furnace instead of air
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that contains only 20 of oxygen
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which is used in the bessemer process he found out that oxygen removed carbon from the molten iron more effectively.
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The process was further developed by an Austrian company called Voest, which is presently known as Voestalpine in the Austrian cities Linz and Donowitz.
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That is why it can also be called Linz-Donowitz process or LD process.
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How does the basic oxygen process work in steel making?
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This steel making process begins with pig iron.
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The pig iron is smelted in a blast furnace after
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which it is poured into a ladle and taken to the basic oxygen furnace.
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In this furnace, The hot metal or pig iron from the blast furnace
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and steel scraps are charged and loaded into the furnace that is tilted about 45 degrees.
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The converter is then placed in an upright position.
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Oxygen is turned on and a water-cooled lance is lowered down into it.
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The lance blows 99% pure oxygen into the charge for about 20 minutes causing oxidation of the elements.
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The oxidation reactions in the converter cause temperatures to rise above 1700 degrees Celsius.
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This melts the scrap and reduces the carbon content of the steel by burning it to form carbon monoxide or carbon dioxide.
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It also creates silicon oxides and other impurities.
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To fine-tune the steel characteristics, fluxes such as burnt lime or dolomite are added to form slag, which absorbs impurities of the steelmaking.
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These adjustments are necessary to achieve the desired quality and ensure the steel meets specific industry standards.
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The chemical compositions, temperature and charging weight of the iron ore are often controlled automatically by a computer.
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The tapping process is the final part of the process, where the slag is then separated from the steel.
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And the refined steel is transferred into the ladles for further processing or subsequent casting.
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The two major types of basic oxygen furnaces involve these steps.
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They include a top-blown basic oxygen furnace and a bottom-blown basic oxygen furnace.
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A top-blown basic oxygen furnace is equipped with a water-cooled oxygen
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lance for blowing oxygen into the pig iron through four to six nozzles.
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A bottom-blown oxygen furnace, also known as Q-BOP, is a less common method.
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Oxygen is injected with lime powder through the two years located at the bottom of the vessel.
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Various parts of a basic oxygen furnace.
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The shell, it is the main body of the basic oxygen furnace and it is made from steel.
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It is strong, durable, and tough the shell does not melt
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because of the refractory lining the refractory lining the refractory lining is a special type of material
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that can reflect
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and withstand heat the refractory lining performs two functions the first is to help retain the heat in the furnace so
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that less energy is required to keep the furnace at operating
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temperature the second function is to protect the steel shell from
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the furnace heat the water cooled oxygen lance the water cooled oxygen lance provides the oxygen to the furnace.
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The lance is watercooled so that it will not melt in the furnace.
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The slagging hole.
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The slagging hole is like a sprout where the slag can be poured out when necessary.
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The tapping hole.
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The tapping hole is used to remove the molten steel from the furnace when the desired quality has been attained.
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The main difference between a basic oxygen furnace and the Bessemer converter is that the basic oxygen furnace uses pure oxygen,
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while the Bessemer converter uses air, which contains nitrogen that can harm some steel grades.
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Also, the main difference between a basic oxygen furnace
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and an electric arc furnace is the type of raw materials they use and the process to create steel.
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For the raw materials, the basic oxygen furnace uses molten pig iron and recycled steel, while the electric arc furnace uses recycled steel.
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For the process, in the basic oxygen furnace, oxygen is blown to reduce the carbon content of the molten iron,
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while an electric arc furnace uses electric arcs to melt the scrap steel.
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Advantages of basic oxygen furnace.
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1. Highly efficient.
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Produces large quantities of steel in a relatively short time compared to other methods.
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2. Lower operational costs, especially when using molten iron from a blast furnace.
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3. Can produce a wide range of steel grades, making it suitable for various applications.
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背景與背景
在當今快速發展的科技時代，鋼鐵製造是一個重要的工業過程，而基本氧爐（Basic Oxygen Furnace，BOF）則是這一過程的關鍵技術之一。通過利用純氧來替代傳統空氣，基本氧爐可以在短時間內將熔融鐵轉換為高質量的鋼。這一內容在《James Sword Engineering Channel》的影片中得到了詳細介紹。瞭解基本氧爐的工作原理不僅能夠增進對鋼鐵生產的知識，還能幫助提升英語能力，特別是在與工業和工程相關的術語方面。
日常交流中的五個重要短語
- "基本氧爐能在20分鐘內將熔融鐵轉化為鋼。" - 增進對鋼鐵製造過程的理解。
- "氧與鋼中的雜質反應形成爐渣。" - 學習如何描述化學反應。
- "氧氣通過4到6個噴嘴吹入熔融鐵中。" - 增強關於工程裝置的描述能力。
- "溫度超過1700攝氏度。" - 學習如何說明高溫條件。
- "調節加入的助熔劑。" - 理解工藝調整的重要性。
逐步跟讀指導
要有效提升英語發音和口語能力，可以通過觀察和模仿影片中的對白來練習。以下是一些實用的步驟，可以幫助您完成這項挑戰：
- 觀看影片：初次觀看時，專注於理解內容，不需要過於關注單詞的細節。
- 逐句跟讀：暫停影片，逐句仔細聆聽並模仿說話者的發音和語調。在這一過程中，您可以利用"shadow speech"技術，努力複述出與說話者相似的語音效果，以此來提高英語發音。
- 記錄自己：用錄音工具錄製您自己的聲響與說話者進行對比，這能幫助您識別發音上的差距。
- 反覆練習：將不熟悉的短語和句子反覆跟讀，直到您能夠流利、自信地表達。
- 與他人交流：嘗試與朋友或學習夥伴一起復述這些短語，通過英語口語練習來加深印象，提升流利度。
通過結合影片內容和有效的跟讀練習，您不僅可以理解鋼鐵生產的複雜過程，還能在過程中提高自己的英語能力，隨時隨地都能利用看YouTube學英語的方法進行學習，有效地掌握新知識。
什麼是跟讀法？
跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。