Iron ore slime as an alternate coolant in steelmaking: Performance evaluation at commercial scale

Rajshekar, Y.; Alex, T C; Sahoo, D.; Babu, G. Anand; Balakrishnan, Vishalache; Venugopalan, T.; Kumar, Sanjay

doi:10.1016/j.jclepro.2016.08.099

Cited by 16 publications

(8 citation statements)

References 16 publications

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“…were 0.992 and 1.089 when the Si contents The optimizations of a steel-making procedure can lead to its metallurgical performance improvement and some other benefits [61][62][63]. da Costa et al [61] investigated the CO 2 emissions of a hydrogen steel-making process, and reduced the CO 2 emissions by 80% when the breakthrough hydrogen technology was applied.…”

Section: Generalized Constructal Optimization For a Blast Furnace Iromentioning

confidence: 99%

“…Lu et al [62] implemented operation optimization of a converter by experiment programs, and optimized the operation parameters of the steel-making process. Rajashekar et al [63] used the iron ore slime as the coolant of the steel-making procedure, and obtained the economic and ecological-resource benefits from this innovative practice. Similar to the works in [59], constructal theory was introduced into the optimization for the converter steel-making elemental package [64].…”

Section: Generalized Constructal Optimization For a Blast Furnace Iromentioning

confidence: 99%

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Generalized Thermodynamic Optimization for Iron and Steel Production Processes: Theoretical Exploration and Application Cases

Chen

Feng

Xie

2016

Entropy

110

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Abstract:Combining modern thermodynamics theory branches, including finite time thermodynamics or entropy generation minimization, constructal theory and entransy theory, with metallurgical process engineering, this paper provides a new exploration on generalized thermodynamic optimization theory for iron and steel production processes. The theoretical core is to thermodynamically optimize performances of elemental packages, working procedure modules, functional subsystems, and whole process of iron and steel production processes with real finite-resource and/or finite-size constraints with various irreversibilities toward saving energy, decreasing consumption, reducing emission and increasing yield, and to achieve the comprehensive coordination among the material flow, energy flow and environment of the hierarchical process systems. A series of application cases of the theory are reviewed. It can provide a new angle of view for the iron and steel production processes from thermodynamics, and can also provide some guidelines for other process industries.

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Section: Generalized Constructal Optimization For a Blast Furnace Iromentioning

confidence: 99%

Section: Generalized Constructal Optimization For a Blast Furnace Iromentioning

confidence: 99%

Generalized Thermodynamic Optimization for Iron and Steel Production Processes: Theoretical Exploration and Application Cases

Chen

Feng

Xie

2016

Entropy

110

View full text Add to dashboard Cite

show abstract

“…These results were obtained by the combination of constructal theory and FTT, and could not be obtained only by constructal theory. The optimizations of an steel-making procedure can lead to its metallurgical performance improvement and some other benefits [61][62][63]. da Costa et al [61] investigated the CO2 emissions of a hydrogen steel-making process, and reduced the CO2 emissions by 80% when the breakthrough hydrogen technology was applied.…”

Section: Generalized Constructal Optimization For a Blast Furnace Iromentioning

confidence: 99%

Generalized Thermodynamic Optimization for Iron and Steel Production Processes: Theoretical Exploration and Application Cases

Chen¹,

Feng²,

Xie³

2016

Preprint

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Combining modern thermodynamics theory branches, including finite time thermodynamics or entropy generation minimization, constructal theory and entransy theory, with metallurgical process engineering, this paper provides a new exploration on generalized thermodynamic optimization theory for iron and steel production processes. The theoretical core is to thermodynamically optimize performances of elemental packages, working procedure modules, functional subsystems, and whole process of iron and steel production processes with real finite-resource and/or finite-size constraints with various irreversibilities toward saving energy, decreasing consumption, reducing emission and increasing yield, and to achieve the comprehensive coordination among the material flow, energy flow and environment of the hierarchical process systems. A series of application cases of the theory are reviewed. It can provide a new angle of view for the iron and steel production processes from thermodynamics, and can also provide some guidelines for other process industries.

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“…Compared to the high quality iron ores, most low-grade iron ores contain a high volume of silica content (30–50 mass %) . The existing room temperature mineral processing methods have difficulty treating the refractory iron ores due to their complex mineral composition, ultrafine-grained disseminated structure, and other reasons. , In recent years, extensive works have been performed to utilize these iron ores by using pyrometallurgical methods. Basically, they can be classified into three main categories, namely, the blending sintering–ironmaking process, magnetizing roasting process, and coal-based direct reduction process.…”

Section: Introductionmentioning

confidence: 99%

A Novel and Green Metallurgical Technique of Highly Efficient Iron Recovery from Refractory Low-Grade Iron Ores

Liang

Huang

et al. 2019

ACS Sustainable Chem. Eng.

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With the shortage of high-grade iron ore resources, there is an increasing demand to utilize low-grade iron ores. However, the utilization of refractory low-grade iron ore resources has always been a challenge for the metallurgical industry. In this paper, a novel and green metallurgical technique of highly efficient iron recovery from refractory low-grade iron ores was proposed. A pilot-scale rotary kiln (φ1.5 m × 15 m) research study proved that products with a metallization ratio of 85.15% can be obtained by this low-temperature but rapid reduction process as ore−coal composite was roasted within temperature zone (1173−1264 K) for 24−32 min. Then, 91.75% of iron can be recycled in the form of iron powder (iron grade reached 93.10%), followed by a grinding−magnetic separation process. Compared to the existing processes, this novel process presents advantages of efficient reduction (only 24−32 min for high temperature reduction) and eco-friendliness (energy consumption: 8.98 GJ/t-DRI; CO 2 emission: 800−1100 kg/t-DRI), showing a broad range of application prospects in the resource development and utilization of the same type. To understand this process in depth, in situ dissection research for the pilot-scale rotary kiln reduction process was performed, investigating the temperature field distribution, the iron and silicon minerals transition, and the iron grains formation and growth. A link between materials conversion and external field condition during the rotary kiln reduction course was established, providing technical support for further optimization of this process.

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Iron ore slime as an alternate coolant in steelmaking: Performance evaluation at commercial scale

Cited by 16 publications

References 16 publications

Generalized Thermodynamic Optimization for Iron and Steel Production Processes: Theoretical Exploration and Application Cases

Generalized Thermodynamic Optimization for Iron and Steel Production Processes: Theoretical Exploration and Application Cases

Generalized Thermodynamic Optimization for Iron and Steel Production Processes: Theoretical Exploration and Application Cases

A Novel and Green Metallurgical Technique of Highly Efficient Iron Recovery from Refractory Low-Grade Iron Ores

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