An environmentally benign process for effective recovery and solidification of Cr from stainless-steel slag

Yang, Cheng; Zhang, Fengxia; Yu, Yong; Yang, Shiliang; Liu, Huili; Wang, Hua; Hu, Jianhang

doi:10.1016/j.jclepro.2024.141898

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…There are some reports on the use of the Waelz slag in the construction industry [13,14] and road making [15,16]; however, high contents of toxic metals often impede meeting the requirements of leachability tests for building materials [17]. In order to prevent the leaching of toxic metals from the Waelz-slag-containing building materials, a preliminary stabilization treatment is needed [18,19]. Iron is the base component of the Waelz slag, but too-high zinc content hinders its utilization in the ironmaking process [20].…”

Section: Introductionmentioning

confidence: 99%

The Waelz Slag from Electric Arc Furnace Dust Processing: Characterization and Magnetic Separation Studies

Grudinsky,

Yurtaeva,

Pankratov

et al. 2024

Materials

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The Waelz slag generated during electric arc furnace dust processing is an iron-rich product with significant amounts of iron, zinc and copper. About 600–800 kg of the Waelz slag is generated per ton of the dust processed. The Waelz slag samples from two different plants were thoroughly characterized using inductively coupled plasma optical emission spectroscopy (ICP-AES), X-ray diffraction analysis (XRD), chemical phase analysis, Mössbauer spectroscopy and other supporting methods. The phase distribution of iron, zinc and copper was determined in the Waelz slag samples. Low-intensity wet magnetic separation was tested for the iron recovery from the Waelz slag samples. It was found that the Waelz slag samples have complex chemical and mineralogical compositions, which can impede the selective recovery of valuable elements. The obtained results indicate that the chemical and mineralogical composition of the Waelz slag samples has a considerable effect on the magnetic separation indexes. The experiments showed that the iron concentrates with Fe contents of 73% and 46.8% with the metallization degrees of 87.2% and 57.5% and the iron recovery degree of 54.8% and 52.9% were obtained at optimal conditions for two different samples, respectively, without selective segregation of Cu and Zn in the magnetic or non-magnetic fraction.

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Section: Introductionmentioning

confidence: 99%

The Waelz Slag from Electric Arc Furnace Dust Processing: Characterization and Magnetic Separation Studies

Grudinsky,

Yurtaeva,

Pankratov

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

Detoxification and synergistic recovery of Cr and V from stainless steel slag and stone coal by self-smelting reduction

Guan,

Dou,

Chen

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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Stone coal was successfully used to synergistically treat stainless steel slag (SSS) to recover both chromium (Cr) and vanadium (V). The alloy with a Cr grade of 70.84% and a V grade of 2.36% can be obtained by keeping SSS and stone coal at a ratio of 50 : 31 at 1600 °C for 120 min. The corresponding recovery rates of Cr and V are as high as 99.51% and 81.25%, respectively. And the content of Cr2O3 in reduced slag is only 0.49%. It thus provides a new idea for the co-processing application of two solid wastes: SSS and stone coal in increasing economic potential and solving environmental issues.

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An environmentally benign process for effective recovery and solidification of Cr from stainless-steel slag

Cited by 2 publications

References 35 publications

The Waelz Slag from Electric Arc Furnace Dust Processing: Characterization and Magnetic Separation Studies

The Waelz Slag from Electric Arc Furnace Dust Processing: Characterization and Magnetic Separation Studies

Detoxification and synergistic recovery of Cr and V from stainless steel slag and stone coal by self-smelting reduction

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