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The Steel Manufacturing Process: How Steel is Made

April 2, 2024 2:01 pm Published by

The Steel Manufacturing Process

Steel is the cornerstone of our everyday society, It is found everywhere, from the inner foundations of almost every building to the technology that gives the possibility to our modern world, steel is everywhere and is everything. Here we are going to look at how exactly steel is made and the steel manufacturing process involved. We will look at steel manufacturing from the perspective of turning raw materials into steel that can be used for fabrication purposes,

  1. Raw Materials Gathering: It all begins with iron ore, extracted from mines across the globe. These ores typically contain iron oxides, which serve as the primary source of iron for steelmaking. Other raw materials include coal, limestone, and various alloys depending on the desired steel characteristics. At Propel Manufacturing, we use steel that is sourced from reputable suppliers, meaning that we only offer high quality and sustainable steel materials.
  2. Iron Making: The extracted iron ore undergoes a transformation in blast furnaces. These towering structures, operate at extreme temperatures. Inside, a precise mixture of iron ore, coke (a form of coal), and limestone is loaded into the furnace. Intense heat is then generated by burning coke, which reduces iron oxides into molten iron, known as hot metal.
  3. Steel Manufacturing Furnace
    Steel Manufacturing

  4. Basic Oxygen Process: In BOP, the hot metal is transferred to a vessel lined with refractory material. High-purity oxygen is then blown into the molten metal, which reacts with impurities such as carbon, silicon, and manganese, converting them into slag. The result is refined liquid steel with precise carbon content.
  5. Electric Arc Furnace: EAF utilises electricity to melt scrap steel or direct reduced iron (DRI) to produce liquid steel. Large graphite electrodes are lowered into the furnace, creating an arc between them and the charge material. This intense heat melts the scrap, while chemical reactions remove impurities. EAFs are highly flexible, allowing for rapid adjustments in steel composition and production volume.
  6. Continuous Casting: Once the steel is refined, it is cast into semifinished forms such as billets, blooms, or slabs using continuous casting machines. This process ensures uniformity and efficiency by continuously pouring molten steel into water-cooled moulds. As the steel solidifies, it is continuously drawn out, forming long strands of solidified steel.
  7. Rolling & Forming: The semi-finished products are then reheated and passed through rolling mills, where they are shaped into their final dimensions. Hot rolling involves passing the steel through successive pairs of rolls to reduce thickness and shape the steel into various forms such as sheets, bars, or structural sections. Cold rolling, on the other hand, further refines the surface finish and dimensional accuracy of the steel.
  8. Finishing & Treatment: After rolling, the steel may undergo additional treatments to enhance its properties. Processes such as heat treatment, quenching, and tempering can improve strength, hardness, and ductility. This is the end of the line regarding the steel manufacturing process, but the next two steps are for steel distribution.
  9. Quality & Inspection: Throughout the manufacturing process, rigorous quality control measures are employed to ensure that the steel meets specified standards. Advanced testing techniques such as ultrasonic testing, X-ray inspection, and spectroscopy help identify any defects or inconsistencies in the final product.
  10. Distribution & Application: Once the steel passes quality checks, it is ready for distribution to various industries ranging from construction and automotive to aerospace and manufacturing. You can check out this video on the steel manufacturing process as it takes you on the journey from start to finish. CLICK HERE

It is important to note that not all steel is created equally. Like everything, steel can vary in quality. Due to this, it is important to get your steel from a reputable supplier. At Propel Manufacturing, we only deal with the highest quality steel, getting it from reputable suppliers.It is our ethos that we offer clients the best quality steel, manufacturing only high-end steel products for our clients. Check out our resources page for more information on all things steel manufacturing and steel fabrications. Click HERE

 

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