Influence of quick lime on pore characteristics of high-temperature zone in iron ore sinter based on XCT technology

Zhou, Hao; Wang, Jiankang; Ma, Pengnan; Meng, Hanxiao; Cheng, Fangzheng; Luo, Jipeng

doi:10.1016/j.jmrt.2021.10.061

Cited by 11 publications

(5 citation statements)

References 38 publications

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“…In the article of Chinese researchers [16], the results of the study are presented, which complement the above-described mechanism of the intensifying effect of quicklime on the sintering process from the position of changing the structure of the sinter. The effect of quick lime on pore characteristics of the high-temperature zone in the iron ore sinter was studied.…”

Section: Discussionmentioning

confidence: 73%

Investigation of the influence of lime content in the charge and its quality on the sintering process of iron ore raw materials

Saveliev,

Kondratenko

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Main objectives of the work was to study the influence of degree of roasting of lime contained in the charge on the sintering process and sinter quality, as well as comparing the impact of changes in the mass fraction of active CaO in the charge by varying degrees of burning lime, and by varying the content of lime in the charge. It is shown that the intensifying effect of lime on the sintering process occurs as a result of a decrease in the content of small classes in the charge. When the lime content in the charge is equal to 3 %, an increase in the degree of lime firing from 5 to 96 % led to an increase in the specific productivity of the plant from 0.96 to 1.87 t/(m 2 · hour). The independence of sintering parameters from the content of active CaO in lime with its constant content in the sinter charge and the decisive role of the content of active CaO in the sinter charge with its constant content in lime are confirmed. A new approach to the production of lime for agglomeration processes is proposed: it should have the lowest cost of the active CaO contained in it.

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Section: Discussionmentioning

confidence: 73%

Investigation of the influence of lime content in the charge and its quality on the sintering process of iron ore raw materials

Saveliev,

Kondratenko

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Mass fractions of fine and coarse ores were set to fine:coarse = 80:20 wt% or 50:50 wt% 23) . The mass fraction of CaO powder was set to 0-5 wt% relative to the whole ore powder 8,26) . The mixtures were prepared by in-bag shaking.…”

Section: Methodsmentioning

confidence: 99%

“…In the wet granulation process for pig iron, water is added to agitate the ore powders in a granulator, such as a drum mixer, and fine ore powders are agglomerated with coarse ore particles using liquid bridge force. In addition, quicklime (CaO) powder is generally added as a binder to increase the strength of the granules and prevent their breakage during the sintering process 8,9) . Wet granulation significantly contributes to the utilization of fine ore powders.…”

Section: Introductionmentioning

confidence: 99%

Optimum Water Content Estimation for Wet Granulation of Iron Ore Powders with Quicklime Binder

et al. 2023

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water content () for estimating the optimum water content ( ) was individually defined 𝑊 torque 𝑊 exp opt for the types I and II. The was well correlated with the , regardless of the type and 𝑊 torque 𝑊 exp opt blending ratio of the original ore powders and quicklime. Finally, the optimum water content was estimated using the . The estimated water content was confirmed to be in good agreement 𝑊 torque with the experimental results, demonstrating that the optimum water content for the wet granulation of fine ore powder with quicklime can be determined using agitation torque.

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“…The return fines ratio is determined based on the principle of return fines balance, and the return fines ratio is 20% in this experiment. The detailed chemical composition of the raw materials utilized in this study can be found in our previous studies. , …”

Section: Experiments and Methodsmentioning

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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Influence of quick lime on pore characteristics of high-temperature zone in iron ore sinter based on XCT technology

Cited by 11 publications

References 38 publications

Investigation of the influence of lime content in the charge and its quality on the sintering process of iron ore raw materials

Investigation of the influence of lime content in the charge and its quality on the sintering process of iron ore raw materials

Optimum Water Content Estimation for Wet Granulation of Iron Ore Powders with Quicklime Binder

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

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