Green and efficient utilization of stainless steel dust by direct reduction and self-pulverization

Liu, Peijun; Liu, Zhenggen; Chu, Mansheng; Tang, Jue; Gao, Lihua; Yan, Ruijun

doi:10.1016/j.jhazmat.2021.125403

Cited by 28 publications

(12 citation statements)

References 36 publications

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“…Overall, STD had the potential for use as the PGMs collector, while the fluxing agent and reducing agent would also be added to reduce the melting temperature. It was worth noting that the oxide states of platinum and palladium were chemically inert and cannot be captured by a metal collector . Simultaneously, it had been proved that the metallic state of the collector was prone to recover more PGMs …”

Section: Resultsmentioning

confidence: 99%

“…It was worth noting that the oxide states of platinum and palladium were chemically inert and cannot be captured by a metal collector. 26 Simultaneously, it had been proved that the metallic state of the collector was prone to recover more PGMs. 27 Figure S3 illustrated that some possible reactions associated with temperature and ΔG involving the reduction of ferrous/ noble metal oxides or derived substances were given out, eqs R1−R5 as followed.…”

Section: Iron-bearing Waste Smelting Collection To Recycle Pgms 311 P...mentioning

confidence: 99%

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Insight into Pyrometallurgical Recovery of Platinum Group Metals from Spent Industrial Catalyst: Co-disposal of Industrial Wastes

Liang

2023

ACS EST Eng.

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Considerable amounts of spent catalyst and metallurgical dust are posing a threat to the ecological environment and human health. Herein, sintering tailing dust (STD) has managed to capture platinum group metals (PGMs) from the spent volatile organic compound control catalyst (SVC) to obtain a Fe-PGM alloy in the pyrometallurgical process. More than 99% PGMs and 90% iron were recovered with a PGM enrichment coefficient around 4. A distribution ratio of 922 was achieved under the conditions of waste matrix (40% SVC:60% STD) and fluxing agents (20 wt % CaO, 12 wt % borax) at 1500 °C for 30 min. Combining DFT calculations with experimental results, the inevitable oxygen species showed a negative effect on PGM recovery, and the effect was more pronounced for platinum. Additionally, various crucial materials (>95 wt %) for industrial production could be separated from slag by stepwise treatment, and the cycling utilization of Na 2 CO 3 would be achieved. Appreciable economic benefits might be profited via this proposed method, and no corrosive, volatile, or other additional solid wastes would be produced. This work is a case study for synergistic disposal of multiple solid wastes and upholds the concept of circular economy. It tries our best to pave the way to establishing a zero-waste society.

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Section: Resultsmentioning

confidence: 99%

Section: Iron-bearing Waste Smelting Collection To Recycle Pgms 311 P...mentioning

confidence: 99%

Insight into Pyrometallurgical Recovery of Platinum Group Metals from Spent Industrial Catalyst: Co-disposal of Industrial Wastes

Liang

2023

ACS EST Eng.

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“…The cooling temperature is lower than 500°C, β-Ca 2 SiO 4 will undergo a sharp transformation to γ-Ca 2 SiO 4 , and the density of β-Ca 2 SiO 4 will change from 3 320 kg/m 3 to 2 960 kg/m 3 corresponding to γ-Ca 2 SiO 4 , resulting in volume expansion. 40) In general, the composition of the slag phase is destroyed and a large amount of self-pulverization slag is generated, which can effectively separate the self-pulverization slag from the metal particles in the reduced product and effectively reduce the energy consumption during subsequent processing.…”

Section: Self-pulverization Effects Of Reduced Product Slag Under Dif...mentioning

confidence: 99%

Carbothermal Reduction of Stainless Steel Dust and Laterite Nickel Ore: Slag Phase Behavior Regulation and Self-pulverization Control Mechanism

Liu

Chu

et al. 2023

ISIJ Int.

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Stainless steel dust is a type of high basicity iron containing solid waste from the iron and steel smelting industry. In this study, the carbon-containing composite briquettes were prepared by adding low basicity laterite nickel ore and stainless steel dust, and the valuable metals Fe, Cr, and Ni were recovered by carbothermal reduction. The results show that the addition of laterite nickel ore into CBSL (carbon containing composite briquette of stainless steel dust and laterite nickel ore) effectively improves the recovery of metal Fe, Cr and Ni and the self-pulverization rate of reduction slag. The reduction temperature is 1 450°C, the reduction time is 30 min, the FC/O (molar ratio of fixed carbon to oxygen) is 1.0, and the laterite nickel ore addition is 6%, the recoveries of metal Fe, Cr and Ni are 92.1%, 90.1% and 91.6%, respectively, and the self-pulverization rate of the reduction slag reaches 91.5%. The Ca 2 SiO 4 phase content of the reduced slag at high temperature is 71.8%, and the reduced slag system is located in the orthosilicate Ca 2 SiO 4 region of the phase diagram, which effectively improves metal recovery, enables efficient separation of the reduced product and reduces energy consumption for subsequent processing.

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“…This not only causes a substantial loss of materials but also leads to the release of toxic elements, given the elevated levels of iron, chromium, and nickel. This creates a significant threat to both the environment and human health. ,,, While SS wastes contain metal alloys composed of iron, chromium, and nickel with contents of 66.82, 20.02, and 4.12%, respectively, poly(ethylene terephthalate) (PET) plastic bottles are mainly composed of terephthalic acid and ethylene glycol . Hence, the current significance lies in the treatment and recycling efficiency of these wastes, not only for an effective resource management but also for the reduction of their potential adverse effects on the environment and human health .…”

Section: Introductionmentioning

confidence: 99%

Ultrarapid and Sustainable Synthesis of Trimetallic-Based MOF (CrNiFe-MOF) from Stainless Steel and Disodium Terephthalate-Derived PET Wastes

Boukayouht,

Bazzi,

Daouli

et al. 2024

ACS Appl. Mater. Interfaces

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Designing easy and sustainable strategies for the synthesis of metal−organic frameworks (MOFs) from organic and inorganic wastes with the efficient removal of phosphate from water remains a challenge. The majority of the reported works have utilized costly precursors and nonsoluble ligands for the synthesis of MOFs. Herein, we have developed a low-cost, simple, and sustainable alternative approach using the coprecipitation method in water at room temperature for the synthesis of a new adsorbentbased trimetallic MOF. Poly(ethylene terephthalate) and stainless steel wastes were used as sources of water-soluble disodium terephthalate ligand and three metallic species (chromium, nickel, and iron salts) for the fabrication of trimetallic MOF (CrNiFe-MOF), respectively. The newly developed MOF demonstrates a superior space-time yield of 5760 g m −3 day −1 , reaching a level allowing the industrialization production of this sustainable MOF. The scanning electron microscopy and adsorption studies revealed that the developed trimetallic MOF consists of aggregated nanoparticles and the presence of defective as well as mesoporous structures. This MOF showed an enhanced adsorption capacity of phosphate from real eutrophic water samples and higher stability in a range of pHs. The density functional theory calculations evidenced that the phosphate ions preferentially adsorb over H 2 O toward the metal oxo-trimers, with the adsorption energies increasing from H 3 PO 4 to PO 4 3− species in line with an improvement of the adsorption performance of CrNiFe-MOF when the pH increases, i.e., when HPO 4 2− and PO 4 3− become more predominant. These calculations also supported that the incorporation of Cr metal sites in the oxo-trimer is expected to boost the phosphate affinity of the MOF. Finally, our work provides an easy and eco-friendly approach for MOF designing to enhance phosphate removal from water.

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Green and efficient utilization of stainless steel dust by direct reduction and self-pulverization

Cited by 28 publications

References 36 publications

Insight into Pyrometallurgical Recovery of Platinum Group Metals from Spent Industrial Catalyst: Co-disposal of Industrial Wastes

Insight into Pyrometallurgical Recovery of Platinum Group Metals from Spent Industrial Catalyst: Co-disposal of Industrial Wastes

Carbothermal Reduction of Stainless Steel Dust and Laterite Nickel Ore: Slag Phase Behavior Regulation and Self-pulverization Control Mechanism

Ultrarapid and Sustainable Synthesis of Trimetallic-Based MOF (CrNiFe-MOF) from Stainless Steel and Disodium Terephthalate-Derived PET Wastes

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