Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures

Wang, Rongrong; Zhang, Jianliang; Liu, Yiran; Zheng, Anyang; Liu, Zhengjian; Xingle, Liu; Li, Zhanguo

doi:10.1007/s12613-018-1623-6

Cited by 9 publications

(5 citation statements)

References 19 publications

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“…The change between the theoretical utilization rate of each stage and the reducing gas composition and temperature is shown in Figure 2 . Guo [ 36 ] and Wang et al [ 37 ] concluded from the study of reaction kinetics that the reducing temperature has a significant effect on the reduction degree. Zuo [ 38 ] and Tang et al [ 39 ] experimentally explored and analyzed the effects of reduction temperature and composition of reducing gas on the reduction degree, which was consistent with the calculated results.…”

Section: Energy Consumption Analysis Of Hydrogen Metallurgymentioning

confidence: 99%

Analysis of Energy Consumption and Its Influencing Factors in Hydrogen Metallurgy Process

Chai

Yue

Zhang

et al. 2022

steel research int.

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Hydrogen metallurgy is an effective way for the high carbon emission steel industry to achieve low‐carbon green transformation and upgrading. According to energy conservation law, the article establishes gas utilization rate and thermal balance calculation models, discusses the influence of key factors such as reducing gas composition, reducing the temperature, and metallization rate on the gas utilization rate and energy consumption, and theoretically calculates the change of energy consumption in the process of steel industry production caused by using hydrogen. The optimal reduction temperature range is 1250–1350 K, which has theoretical minimum energy consumption, about 3.14 GJ, and maximum gas utilization rate, about 45%. The results show that when using 100% hydrogen reduction, increasing the reduction temperature properly lower theoretical energy consumption can be achieved and raise gas utilization rate and further achieve the goal of energy saving and consumption reduction, which is expected to provide beneficial help for hydrogen metallurgy developing in the steel industry.

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Section: Energy Consumption Analysis Of Hydrogen Metallurgymentioning

confidence: 99%

Analysis of Energy Consumption and Its Influencing Factors in Hydrogen Metallurgy Process

Chai

Yue

Zhang

et al. 2022

steel research int.

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“…They are given enough time to undergo a gravitic separation among the settlement region. Moreover, hot off-gas (containing H2, H2O, CO, and CO2) is directed toward the heat exchanger to preheat the feed gas (24)(25)(26).…”

Section: Introductionmentioning

confidence: 99%

“…Although pure oxygen or oxygen-enriched air is regularly used for fuel combustion to reduce emissions (24,34), the process can utilize air blast instead, which is more economical. In addition, highly problematic coke-making, pelletization/sintering, and gas-reforming units would be eliminated (24)(25)(26). A typical FIT process is reported to emit less than 0.98 tons of CO2 and consumes about 8.68 GJ energy for every ton of hot metal produced, which are believed to be, respectively, about 39% and 32% lower than the average amounts corresponding to the conventional blast furnace ironmaking process (24).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Simulation of an Efficient Flash Ironmaking Technology for Chadormalu Mining and Industrial Company

Firouzi,

Sadrnezhaad

2024

IJE

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The Flash Ironmaking Technology (FIT) utilizing methane (CH4) and air blast (containing 21% oxygen) has been exclusively simulated and calculated for the Chadormalu Mining and Industrial Company (CMIC). The obtained results based on thermodynamic simulation and heat and material balance calculations of the FIT have revealed that a total rate of 70.405 tons/h preheated CH4 is required for the annual production of one million tons of hot metal with 95% metallization. 47% of the methane acts as a reducing agent, and the rest burns with 764.489 tons/h preheated air blast (including 20% excess) to provide 1078 GJ/h energy for running the process at 1600 ˚C (1873 K). Accordingly, 193.134 tons/h carbon dioxide (CO2) is emitted through the process, equivalent to 1.550 tons for every ton of produced hot metal. It indicates that the simulated FIT is eco-friendlier than the blast furnace and coal-based direct reduction ironmaking processes while eliminating coke-making, pelletization or gas-reforming units.

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“…Presently, blast furnace ironmaking adding hydrogen and direct reduction iron by hydrogen (DRI) are the two main hydrogen metallurgy methods [ 6 , 7 ], the temperature of the former process is about 1500 °C, the DRI is 750–1360 °C [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. In addition, raising the temperature is the trend because a high temperature means high productivity in the hydrogen metallurgy process.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Application Prospect of Refractories for Hydrogen Metallurgy: The Enlightenment from the Reaction between Commercial Brown Corundum and Hydrogen

Chen

et al. 2022

Materials

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Hydrogenous environments put forward new requirements to refractories for the hydrogen metallurgy field. The temperature and impurities in refractories played an important role in stability. A commercial brown corundum with many impurities was adopted as a raw material, thermodynamic calculations and reduction experiments of the brown corundum by high-purity hydrogen (99.99%) were accepted to investigate the stability of the oxides. The weight loss and mass fraction were tested to estimate the stability of the oxides in the brown corundum. XRD and SEM were used to analyze the mineral compositions and microstructures. The results showed that: the thermodynamic stability of the oxides in the brown corundum under high-purity hydrogen was in the order of Al2O3 > CaO > MgO > SiO2 > TiO2 > Fe2O3 at temperatures lower than 1400 °C. Obvious weight loss appeared after heating at 1400 °C for 8 h. The content of CaO did not decline after reduction even at 1800 °C, owing to the formation of hibonite (CaAl12O19), high-purity Al2O3 and CaAl12O19 -based refractories had the prospect for lining materials in the hydrogen metallurgy field, owing to their excellent chemical stability under hydrogenous environments.

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Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures

Cited by 9 publications

References 19 publications

Analysis of Energy Consumption and Its Influencing Factors in Hydrogen Metallurgy Process

Analysis of Energy Consumption and Its Influencing Factors in Hydrogen Metallurgy Process

Thermodynamic Simulation of an Efficient Flash Ironmaking Technology for Chadormalu Mining and Industrial Company

Investigation on Application Prospect of Refractories for Hydrogen Metallurgy: The Enlightenment from the Reaction between Commercial Brown Corundum and Hydrogen

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