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Related Concept Videos

Steel Manufacturing01:26

Steel Manufacturing

1.4K
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
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Steel Fastening Techniques01:17

Steel Fastening Techniques

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Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
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Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

1.0K
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
1.0K
Structural Steel Products01:24

Structural Steel Products

619
Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
619
Carbon-dioxide Fixation01:28

Carbon-dioxide Fixation

626
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
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Corrosion of Reinforcement01:27

Corrosion of Reinforcement

490
The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
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Updated: Jan 13, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
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Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

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Technological pathways for cost-effective steel decarbonization.

Xinyi Wu1,2, Jing Meng3,4, Xi Liang1

  • 1The Bartlett School of Sustainable Construction, University College London, London, UK.

Nature
|October 30, 2025
PubMed
Summary
This summary is machine-generated.

Decarbonizing the steel industry requires plant-specific strategies. Energy efficiency and scrap reuse are cost-effective now, while carbon capture and green hydrogen offer future solutions for net-zero targets.

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Area of Science:

  • Industrial decarbonization
  • Materials science
  • Environmental engineering

Background:

  • The iron and steel sector is crucial for net-zero goals but difficult to decarbonize.
  • Existing roadmaps lack plant-specific guidance due to heterogeneity and economic factors.

Purpose of the Study:

  • To develop a model for identifying the least-cost decarbonization technology pathway for individual steel plants globally.
  • To align plant-level strategies with national carbon-neutrality targets.

Main Methods:

  • Integration of global plant-level datasets.
  • Forecasting of technology costs.
  • Development of a plant-specific least-cost pathway model.

Main Results:

  • Short-term (pre-2030): Energy efficiency and scrap reuse are cheapest, reducing CO2 emissions significantly.
  • Long-term (post-2030): Smelt reduction with carbon capture becomes viable, especially in China, Japan, Korea, and Europe.
  • Post-2040: Green hydrogen-based steelmaking shows potential for further CO2 abatement in Europe.

Conclusions:

  • Plant-specific pathways reconcile economic interests with climate objectives.
  • Actionable strategies are provided to support global net-zero targets in the steel sector.