Intensive reduction of fuel consumption in the sintering process of double-layered fuel segregation with return fines embedding

Sun, Chengfeng; Ma, Panshuai; Deng, J.; Bai, Lingxiao; Liao, Zhongju; Pei, Yuandong; Zhang, Qiaoyu; Xu, Jian

doi:10.1016/j.fuel.2022.125955

Cited by 8 publications

(5 citation statements)

References 59 publications

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“…1,2) which means that there is an urgent need to reduce the carbon emitted by the sintering process. Recently, the main research directions for reducing carbon emissions in the production process are as follows: (1) improving raw material conditions and optimising ore blending; [3][4][5][6] (2) processing improvements based on conventional sintering; [7][8][9] (3) improving waste heat recovery and utilisation; [10][11][12] (4) improving equipment utilisation and reducing air leakage rates. [13][14][15] These studies have yielded some results in reducing carbon emissions and energy consumption, while the presence of solid fuels has tied the sintering process to a reduction in carbon emissions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Mineralisation Consolidation in Carbon-free Iron Ore Sintering Process

Jiang,

Chen,

Zhou

et al. 2023

ISIJ Int.

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Sintering, as one of the major sources of carbon emissions in the steel industry, is in urgent need of innovation in carbon reduction technology under the targets of carbon peaking and carbon neutrality in China. We propose the carbon free sintering process which is similar to the belt roaster, where heat is provided by gas fuel combustion for the layer. In order to achieve the process, this study uses the microsintering method to simulate it by varying the sintering temperature, sintering time and binary basicity of the mixture. It was investigated the process of mineralisation solidification of carbon-free sintering and to provide relevant guidance for future carbon-free sintering process experiments. As the sintering temperature increased, the strength and calcium ferrite of the samples first increased and then decreased, reach the maximum value at 1 300°C and 1 275°C respectively. However, the porosity of the samples first decreased and then increased, reach the minimum value at 1 275°C. As the sintering time increased, the strength and calcium ferrite first increased and then decreased, reach the maximum values at 12 min and 6 min respectively, and the porosity of the samples first decreased and then increased, reach the minimum values at 6 min. As the binary basicity increased, the strength of the samples first decreased and then increased, reach the minimum value at basicity 1.8, and the calcium ferrite and porosity of the samples gradually increased. The carbon-free sintering process does not change the consolidation process of iron ore, and it has theoretical feasibility.

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Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Mineralisation Consolidation in Carbon-free Iron Ore Sintering Process

Jiang,

Chen,

Zhou

et al. 2023

ISIJ Int.

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“…Sun et al 51 compared the fuel consumption reduction of different sintering technologies, including waste heat utilization, gaseous fuel injection, granulation optimization, and fuel distribution optimization. The fuel consumption reduction using different sintering technologies was between 3.1 and 16%.…”

Section: Comprehensive Evaluation and Further Discussionmentioning

confidence: 99%

Effect of Ammonia Injection on the Iron Ore Sintering Process: Reducing Fossil Fuel Consumption and Carbon Emissions

Wang,

Meng,

Liu

et al. 2023

Energy Fuels

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The experiment involving ammonia injection was conducted to minimize solid fuel consumption and carbon emissions during the sintering process of iron ore. The sintering bed temperature, sintered ore quality, combustion efficiency, and pollutant emission under different ammonia injection concentrations and coke ratios were investigated. The experimental findings indicate that the injection of ammonia has a positive impact on the thermal mode of the sintering bed, leading to an increased yield of sintered ore and an improved tumbler index. Additionally, ammonia injection enhances the fuel combustion efficiency and reduces CO emissions. Compared with the traditional case that without ammonia injection, the yield under 1.5% vol ammonia injection increased from 63.69 to 74.78%, the tumbler index increased from 54.9 to 60.7%, and the average combustion efficiency increased from 89.42 to 93.42%. Under 1.0% vol ammonia injection, it is possible to decrease the coke ratio from 4.5 to 3.5% without weakening the sintered ore quality and the solid fuel consumption ratio and carbon emissions can be reduced by 22.2%.

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“…The resistance to diffusion in the burning of coke is comprised of the resistance of the ash layer, the resistance of the material wrapped outside the particles, and the resistance of the boundary layer. Based on the assumptions made above, the reaction rate of coke combustion may be computed using the formula below [48]:…”

Section: Coke Combustionmentioning

confidence: 99%

“…The process follows the gas-solid unreacted core model, as shown in Figure 3. Based on the assumptions made above, the reaction rate of coke combustion may be computed using the formula below [48]:…”

Section: Reduction Of Iron Oxidesmentioning

confidence: 99%

Numerical Simulation of Heat and Mass Transfer Behavior during Iron Ore Sintering: A Review

Liu

Wang

et al. 2023

Metals

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Accurate computational models of sintering behavior would assist to enhance sinter quality and are anticipated to play a role in yield prediction. Sintering is a vital process in the manufacturing of iron and steel. As a consequence, the primary objective of these models will be a thorough simulation of mass and heat transport during the sintering process. In this paper, based on the examination and integration of previous studies, the fundamental physical formula and chemical reactions of the numerical simulation of the sintering process are introduced in depth with mechanism analysis. Furthermore, in view of the current numerical simulation methods and sintering process technology innovation development, the studies on sintering numerical simulation are reviewed from different angles, of which the main methods and assumptions are discussed. Finally, the current state of sintering simulation including the numerical simulation of innovative algorithm and optimized sintering technology is discussed in detail, along with potential implications for model development.

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Intensive reduction of fuel consumption in the sintering process of double-layered fuel segregation with return fines embedding

Cited by 8 publications

References 59 publications

Effect of Process Parameters on Mineralisation Consolidation in Carbon-free Iron Ore Sintering Process

Effect of Process Parameters on Mineralisation Consolidation in Carbon-free Iron Ore Sintering Process

Effect of Ammonia Injection on the Iron Ore Sintering Process: Reducing Fossil Fuel Consumption and Carbon Emissions

Numerical Simulation of Heat and Mass Transfer Behavior during Iron Ore Sintering: A Review

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