Cooling phenomena in blast furnace hearth

Jiao, Kexin; Zhang, Jianliang; Liu, Zhengjian; Deng, Yong; Chen, Chunlin

doi:10.1007/s42243-018-0160-x

Cited by 11 publications

(3 citation statements)

References 12 publications

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“…Currently, one of the dominant issues facing non-ferrous metallurgy enterprises is to increase the productivity of uidized bed roasting furnaces by increasing the lifetime of the furnace [9]. Therefore, to solve this issue, it is proposed to replace the traditional method of lining uidized bed furnaces with piece materials uidized bed with a monolithic concrete version, but for this it is necessary to prove that heatresistant concrete meets the technological requirements of these furnaces [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

Apshikur,

Goltsev,

Alimkulov

et al. 2024

Preprint

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The research purpose of the work is to extend the service life by experimental study of the performance of the liquid-layer furnace. Here, instead of large and small aggregates, the effect of the use of secondary refractory substances in reducing the cost of the concrete mixture is studied. The value of the study is to prove that heat-resistant concrete meets the technological requirements of a liquid-layer furnace, as well as experimental confirmation of the possibility of using secondary refractory materials as heat-resistant concrete aggregates. To solve this problem, it was proposed to replace the traditional method of facing the boiling floor furnaces (Fireclay brick of the SHB brand) with a monolithic concrete version. Considering that the technological feature of the boiling layer of the furnace is a high temperature up to 1000°C and an aggressive environment that causes SO3 gaseous sulfur, one of the well-known types of heat-resistant concretes, the sodium-infused liquid glass concrete type is selected as the base, and instead of cement, it is recommended to use liquid glass with low thermal conductivity, such as a material in the amorphous phase and a glass-layered composite viscous substance.

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Section: Introductionmentioning

confidence: 99%

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

Apshikur,

Goltsev,

Alimkulov

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…It promotes the formation and adhesion of the solidified iron layer. If there is a scale or air gap in the hearth, it has a great impact on the heat transfer system [11][12][13]. The heat cannot be transferred in time.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Model for Evaluating Protection Measures of Blast Furnace Hearth

Wang

Chen

et al. 2022

Processes

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The blast furnace (BF) hearth is critical for determining the life of a BF. Irreversibly eroded hearths can be caused by high-temperature molten iron erosion, alkali metal corrosion, and thermal stress. When serious depression erosion occurs in the hearth, furnace protection measures can prevent the erosion from expanding and ensure the safe operation of the BF. At present, furnace protection measures and furnace protection strength are mostly selected based on engineering experience. In this paper, a three-dimensional (3D) computational fluid dynamics (CFD) numerical model of BF hearth with elephant-type depression erosion was established to predict and evaluate the effect of furnace protection measures. At the same time, the phase change behavior of hot iron solidification was also considered. A numerical model was used to analyze common furnace protection measures such as increasing furnace hearth cooling, closing the tuyere, reducing the tapping productivity, and reducing the tapping temperature. The calculation results are consistent with actual furnace protection experience.

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“…The lowest part, the hearth, is a crucial region of the blast furnace (BF), which is the dominant industrial unit for the production of liquid iron ("hot metal"), which is the raw material for primary steelmaking [1,2]. It is widely recognized that the state of the hearth plays a crucial role in the performance of the BF, and that an undisturbed and well-controlled hearth state is an essential prerequisite for achieving an efficient operation, a low energy consumption, and a long campaign life of the BF [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Blast Furnace Hearth State Using an Inverse-Problem-Based Wear Model

Zhang

Hou

Shao

et al. 2022

Metals

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An undisturbed and well-controlled hearth state is an essential prerequisite for achieving a long campaign life and low production costs in an ironmaking blast furnace, because hearth wear and hot metal and slag drainage are crucial factors in its operation. With the objective to estimate the hearth state of the refractory of a three-taphole blast furnace, a wear model of the hearth erosion and skull formation was developed. The model is based on thermocouple readings in the hearth lining and solves an inverse heat conduction problem for a series of co-axial vertical slices, where the erosion and skull lines are optimized simultaneously. The model is optimized for fast computation by adopting a novel procedure featuring fixed mesh during the looping calculation. The results revealed that the hearth refractory showed an elephant-foot-shaped profile with excessive erosion in the hearth periphery, indicating that liquid flows are suppressed in the hearth bottom and that the permeability of the core of the deadman is low. These findings were further elaborated and confirmed by a comparison between the estimated hearth state and other key operation variables, including the coke rate, blast kinetic energy, and residual carbon appetite of the hot metal.

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Cooling phenomena in blast furnace hearth

Cited by 11 publications

References 12 publications

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

Numerical Simulation Model for Evaluating Protection Measures of Blast Furnace Hearth

Estimation of the Blast Furnace Hearth State Using an Inverse-Problem-Based Wear Model

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