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Related Concept Videos

Steel Manufacturing01:26

Steel Manufacturing

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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.
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Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
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After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
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Related Experiment Video

Updated: Jan 3, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
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Zinc removal from basic oxygen steelmaking (BOS) filter cake by sintering.

Huibin Li1, David J Pinson2, Paul Zulli1

  • 1School of Mechanical Materials Mechatronics and Biomedical Engineering, University of Wollongong, ARC Research Hub for Australian Steel Manufacturing, Wollongong, NSW 2500, Australia.

Journal of Hazardous Materials
|November 18, 2019
PubMed
Summary

Coke and metallic iron in steelmaking filter cake act as reductants for zinc removal during sintering. Adding coke breeze significantly enhances zinc removal, with tablet form and placement in the sinter bed being key factors.

Keywords:
Mechanism of zinc removalMillipot sinteringRecyclingSinter plantSteelmaking dustTablet testing

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Area of Science:

  • Metallurgical Engineering
  • Environmental Science

Background:

  • Basic oxygen steelmaking produces filter cake containing zinc.
  • Effective zinc removal is crucial for environmental and economic reasons.

Purpose of the Study:

  • To investigate zinc removal from basic oxygen steelmaking filter cake.
  • To evaluate the effectiveness of coke and metallic iron as reductants during sintering.

Main Methods:

  • Tablet testing and millipot sintering were employed under varying conditions.
  • Experiments were conducted at temperatures up to 1300°C with controlled oxygen partial pressures.
  • The impact of adding coke breeze (3-9 wt%) was assessed.

Main Results:

  • Zinc removal increased with temperature and decreased oxygen partial pressure.
  • Without added coke, zinc removal reached 24.6% at 1300°C in nitrogen.
  • Adding 3-9 wt% coke breeze enhanced zinc removal to 60.6-91.4% under 0.5 vol% oxygen.
  • Tableted filter cake, especially with added coke, proved effective in millipot sintering.

Conclusions:

  • Coke and metallic iron are effective reductants for zinc removal from filter cake.
  • Optimizing temperature, oxygen partial pressure, and coke addition enhances zinc removal efficiency.
  • Positioning tableted filter cake with added coke at the bottom of the sinter bed is a promising strategy for zinc removal.