Fundamental Investigation on Removal of Copper from Molten Iron with Na&lt;sub&gt;2&lt;/sub&gt;CO&lt;sub&gt;3&lt;/sub&gt;–FeS Fluxes

Uchida, Yoshiyuki; Matsui, Akiko; Kishimoto, Yasuo; Miki, Yuji

doi:10.2355/isijinternational.isijint-2014-776

Cited by 16 publications

(15 citation statements)

References 18 publications

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“…As is known to all, alkali oxides (Li 2 O, Na 2 O, K 2 O) have been widely considered as tundish covering agent and mold flux as it can dramatically improve the physical properties of slag, such as decreasing the viscosity, increasing the fluidity, decreasing the smelting point. However, alkali oxide is scarcely applied in LF (Ladle furnace) refining slag (SiO 2 ‐CaO‐Al 2 O 3 system slag) to produce tire cord steel or saw wire steel.…”

Section: Effect Of Alkali Element On Inclusions In Tire Cord Steel Ormentioning

confidence: 99%

State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

Chen

Zheng

et al. 2019

steel research int.

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Non-metallic inclusions in tire cord steels and saw wire steels often act as breakage source during cold drawing and standing process. In this work, the control of inclusions in tire cord steels and saw wire steels in the production process are extensively reviewed. On the one hand, the new perspectives on the problems left over in the past have been discussed comprehensively, include the new understanding of the origins of SiO 2 -CaO-Al 2 O 3 system inclusions, the new found of evolution of inclusions in cord steel and saw wire steel during rolling and drawing process, and the new understanding of controlling the plasticity of inclusions. On the other hand, the new approaches of controlling inclusions in tire cord steels and saw wire steels have also been discussed, include alkali oxides treatment, boron treatment, Mg treatment and cerium treatment. R 2 O (R ¼ K, Rb, Cs) containing refining slag can significantly improve the cleanliness of saw wire steels and saw wire steels. Adding alkali oxides, boron or Mg into molten steel can dramatically improve the deformability of inclusions through expanding the acreage of the region with low melting points. The basicity of top slag at the range of 1.1-1.2, and ωAl 2 O 3 in top slag around 3 wt% in order to control the composition of inclusions in the region with low melting points when ZrO 2 -based refractory be used to reduced the pure Al 2 O 3 inclusions in tire cord steel. Finally, the unsolved problems are summarized.

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Section: Effect Of Alkali Element On Inclusions In Tire Cord Steel Ormentioning

confidence: 99%

State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

Chen

Zheng

et al. 2019

steel research int.

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“…1) However, contamination with tramp elements is a major concern. [2][3][4][5][6] Other materials are often unintentionally mixed with steel scrap in current recycling schemes, where an end-of-life product consisting of steel and other materials is not always dismantled and separated entirely. [7][8][9] Contamination cannot be predicted due to its unintentional nature.…”

Section: Introductionmentioning

confidence: 99%

Potential Influences of Impurities on Properties of Recycled Carbon Steel

et al. 2021

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Contamination with tramp elements is a major concern in steel recycling. This study aimed to identify the influence of impurity elements on the major properties of carbon steel. The content of impurity elements in recycled steel was determined via elemental analysis of randomly sampled steel bars. Of the 23 impurity elements considered, 15 were found to be mixed in the recycled steel. Industrial standards stipulate that the six major properties of carbon steel are tensile strength, elongation, yield point or proof stress, soundness in the welding area, fracture toughness, and bendability. The influence of the fifteen impurity elements on all of these properties except bendability was investigated by reviewing previous academic reports. Properties related to strength and stress were found to be enhanced by the presence of almost any impurity, while elongation and welding soundness were often compromised. The influence of impurities on the other properties remains largely unknown. The negative effects of impurities on the workability and weldability can be minimized by adjusting the steelmaking, casting, and annealing processes, or rethinking the design of products and manufacturing processes. Further, the incorporation of impurities may be prevented during the recovery of steel scrap from end-of-life products. A useful approach to the prevention of the negative influence of impurities is a new concept termed R-PSPP, which stands for recovery, process, structure, property, and performance.

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“…A variety of methods during the last decades for the removal of copper from steel scrap were suggested based on the unique properties of copper, including that copper has a good affinity to sulfur, a high evaporation rate at high temperatures, and forms volatile gas species with Cl. Thereafter, a series of decopperization methods were reported: (1) treatment by reaction with sulfur-containing slag [5][6][7][8]; (2) vacuum distillation [2,[9][10][11][12];…”

Section: Introductionmentioning

confidence: 99%

Verification of Possibility of Molten Steels Decopperization with ZnAl2O4

Wei

Dudczig

Chebykin

et al. 2021

Metals

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In the previous research works, ZnAl2O4 material was considered as one of the solutions for the decopperization process of molten steels; up to 33% of decopperization efficiency was reported by utilising the ZnAl2O4 filter. In order to verify the decopperization possibility of ZnAl2O4 materials, iron-based alloys with various copper and carbon contents were interacted with ZnAl2O4 substrates in a heating microscope under an argon gas atmosphere at 1600 °C. Fe-Cu alloys were found to react with the ZnAl2O4 substrate during the interaction process, and a reaction layer with a complex composition around the alloy droplet was formed; however, Cu was not detected in the reaction layer. Cu was later found diffused inside of the ZnAl2O4 substrates. Furthermore, the Cu-Zn compounds were detected when the copper content in Fe-Cu alloys was 10 wt% Cu. After interaction experiments, copper was decreased in all cases. Thereby, the copper evaporation and infiltration into the ZnAl2O4 substrate were considered as the reasons for copper loss. Moreover, oxygen dissolved in melt was found to have a great effect on the copper evaporation process.

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Fundamental Investigation on Removal of Copper from Molten Iron with Na<sub>2</sub>CO<sub>3</sub>–FeS Fluxes

Cited by 16 publications

References 18 publications

State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

Potential Influences of Impurities on Properties of Recycled Carbon Steel

Verification of Possibility of Molten Steels Decopperization with ZnAl2O4

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