The Indirect Mineral Carbonation of Electric Arc Furnace Slag Under Microwave Irradiation

Tong, Zhibo; Ma, Guojun; Zhou, Dan; Yang, Gang; Peng, Cheng

doi:10.1038/s41598-019-44162-x

Cited by 28 publications

(7 citation statements)

References 31 publications

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“…First, the process was more straightforward and required no additives. Traditional vaterite synthesis often involves crystal modifiers such as organic compounds (e.g., ethanol, sucrose, amino acids) or high-energy processes (e.g., ultrasound, microwave) to reduce the crystal surface energy. − In contrast, our approach simplified the vaterite formation control through precise pH adjustment (pH ∼ 10.6), maintaining an NH 4 + /Ca 2+ ratio close to 5 and taking into consideration leached metal ions. Second, our process demonstrated a high utilization efficiency of CO 2 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of High-Purity and Stable Vaterite Via Leaching–Carbonation of Basic Oxygen Furnace Slag

Song,

Guo,

Ling

2024

ACS Sustainable Chem. Eng.

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Against the backdrop of the limited industrial application and low added value of precipitated calcium carbonate produced through the indirect carbonation of basic oxygen furnace slag (BOFS), this study proposed a simple approach (extracting Ca 2+ from BOFS using ammonium chloride (NH 4 Cl) and subsequently optimizing the aqueous carbonation process) for synthesizing high-purity vaterite with greater added value. The influencing factors in the enhancement of Ca 2+ leaching efficiency and maximization of carbonation to sequester CO 2 were studied. Within a very short time (10 min), a Ca 2+ leaching ratio of 60.3% was achieved, while a 99.5% carbonation ratio was attained by adding NH 4 OH to produce high-purity (98%) homogeneous vaterite. The alkaline pH (∼10.6) of the solution was refined using ammonia to achieve a higher CO 3 2− /Ca 2+ ratio and solution supersaturation for the stimulation of vaterite nucleation. The adsorption of NH 4 + and metal cations from BOFS on the surface of vaterite acted as a crystalline control agent to inhibit the transformation of vaterite into calcite. In addition, the carbonation filtrate can be recycled at least six times with a sustained extraction-carbonation efficiency of over 60% while maintaining the vaterite crystalline integrity. The solid residue was mainly composed of silica gel and inert reducible oxide (RO) phase, which can be used as a potential supplementary cementitious material due to its pozzolanic properties. Findings from this study provide new insights into the valorization of BOFS to mitigate CO 2 emissions and promote the sustainable industrial application of the BOFS indirect carbonation process.

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Section: Resultsmentioning

confidence: 99%

Synthesis of High-Purity and Stable Vaterite Via Leaching–Carbonation of Basic Oxygen Furnace Slag

Song,

Guo,

Ling

2024

ACS Sustainable Chem. Eng.

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“…As the most of the calcium in the desulfurization slag exists in the form of calcium oxide and silicate, calcium can be leaching by ammonium chloride solution with high selectivity [14,15] , and it will reduce the addition of texturizine agent effectively. In addition, our preliminary experiments [16,17] also showed that the filtrate of slag leaching by NH4Cl is a high purity system of CaCl2-NH4Cl-NH3-H2O, and high purity and commercial calcium carbonate can be prepared by blowing carbon dioxide gas. The carbonization process was spontaneous, and ammonium chloride could be recycled during the leachingcarbonization process.…”

Section: Introductionmentioning

confidence: 88%

Study on a new process and its kinetics of iron recovery and glass-ceramics preparation from desulfurization slag

Tong

Sun

Liu

et al. 2022

J min metall B Metall

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This paper creatively proposes a new process with desulfurization slag leached by ammonium chloride as pretreatment, and the main point of this paper lies in the processing of desulfurization residue leached by ammonium chloride. Through component analysis, the formula is adjusted with high aluminum coal ash and glass cullet, making the melting point of the reduction slag is around 1200?C, which facilitates the separation of iron and slag, at the same time, the reduction slag is adjusted to the target crystallization phase, so that the high temperature reduction slag after carbon thermal reduction can be used to produce glass-ceramics directly. The results show that iron recovery rate is over 99%, and diopside and nepheline glass-ceramics are produced, which show that the new process is feasible. However, the crystal growth index is less than 3, which means that the crystallization capacity of the glass-ceramics is low, and nucleating agent is needed in the preparation of glass-ceramics.

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“…In terms of particle size, Owais et al [30] investigated three distinct particle sizes ranging between 0.50 µm, 50-74 µm, and 74-125 µm and determined the optimum particle size of 0-50 µm with greater elution efficiency. Similarly, numerous investigations have found that smaller particle size leads to a higher elution efficiency [31,32]. Previous studies indicated that elution efficiency is directly proportional to extractant concentration and temperature.…”

Section: Introductionmentioning

confidence: 94%

Elution of Divalent Cations from Iron Ore Mining Waste in an Indirect Aqueous Mineral Carbonation for Carbon Capture and Storage

Soomro,

Mohd Kusin,

Mohamat-Yusuff

et al. 2024

Sustainability

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Mining waste is generated in vast quantities globally, which can have negative environmental consequences. This study highlights the utilization of iron ore mining waste as feedstock material in the preparatory step of an indirect aqueous mineral carbonation for carbon sequestration. The role of reactive cations (Ca2+, Mg2+, and Fe2+) was investigated in view of their elution behavior to improve carbonation efficiency. An elution experiment was carried out for the divalent cations using different acids (oxalic, HCl, acetic, and formic acid) at different concentration solutions (up to 1.5 M) and times (up to 100 min) at ambient temperature. The initial analysis confirmed the presence of divalent cations in the sample. The elution approach at ambient temperature resulted in the elution efficiency of Fe2+ (30.4%), Mg2+ (54%) using oxalic acid, and Ca2+ (98%) using HCl at a relatively short time between 50 and 100 min. It was found that for the iron ore mining waste, oxalic acid and HCl were best suited as elution agents for the Fe2+ and Mg2+, and Ca2+, respectively. The CO2 sequestration potential was calculated to be 131.58 g CO2/kg residue. A further carbonation step using a complexing agent (1,10 phenanthroline) confirmed the formation of siderite and magnesite along with phenanthroline hydrates. Findings have shown that the indirect mineral carbonation of the iron mining waste with complexing agent might improve carbonation efficiency, thus indicating that this material is useful for long-term carbon capture and storage applications.

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The Indirect Mineral Carbonation of Electric Arc Furnace Slag Under Microwave Irradiation

Cited by 28 publications

References 31 publications

Synthesis of High-Purity and Stable Vaterite Via Leaching–Carbonation of Basic Oxygen Furnace Slag

Synthesis of High-Purity and Stable Vaterite Via Leaching–Carbonation of Basic Oxygen Furnace Slag

Study on a new process and its kinetics of iron recovery and glass-ceramics preparation from desulfurization slag

Elution of Divalent Cations from Iron Ore Mining Waste in an Indirect Aqueous Mineral Carbonation for Carbon Capture and Storage

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