Extending the Campaign Life of an Intensively Operating Blast Furnace

Филатов, С. В.; Курунов, И. Ф.; Gordon, Y.; Tikhonov, D. N.; Grachev, S. N.

doi:10.1007/s11015-017-0384-1

Cited by 8 publications

(7 citation statements)

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“…(6) There are no large cracks and crevices in hearth lining [23]. (7) The P-wave energy is large enough to detect the thickness of the whole lining carbon brick [24]. (8) Due to the influence of temperature, the elastic modulus of refractory changes within the uniform gradient between cold and hot surfaces [2].…”

Section: ) Principle Of Thickness Measurementmentioning

confidence: 99%

“…The literature [5], [6] studied the application of AU-E technology in blast furnace hearth, the influence of temperature on the velocity of stress wave was calculated through the carbon brick sample of blast furnace to be tested, and then the hearth lining thickness was calculated by the wave velocity, finally, the thickness was verified by damage investigation after shutdown. The literature [7]- [9] described the detection of lining thickness of several blast furnace hearth by AU-E technology, the wave velocity in the thickness calculation was determined by the refractory data sheets and mechanical properties of similar bricks, and the hearth thickness detection results were verified on the blast furnace of the same design. The literature [10], [11] used AU-E technology and thermal data from thermocouples and cooling system to calculate the lining thickness of blast furnace hearth and predict the further wear area over time.…”

Section: Introductionmentioning

confidence: 99%

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Detection of Blast Furnace Hearth Lining Erosion by Multi-Information Fusion

Wen

Zhao³

2021

IEEE Access

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The blast furnace hearth refractories are exposed to complex chemical attack and thermal stress erosion, which will lead to the gradual failure of refractories. The campaign life of a blast furnace depends on its remaining hearth refractory lining, so it is very important to understand the remaining thickness of hearth refractory for prolonging the service life of blast furnace. In order to understand the damage of hearth refractory more accurately, a multi-information fusion method for measuring the refractory lining thickness of blast furnace hearth was proposed, which was based on the application advantages of impact echo technology, thermocouple and cooling stave heat flux intensity in blast furnace hearth. The influence of temperature change in different material layers of hearth on wave velocity was considered. In addition, the thickness of refractory lining of blast furnace hearth was detected by the method of multi-information fusion. It is found that the multi-information fusion thickness detection method improves the accuracy of thickness measurement compared with the impact echo thickness detection method. INDEX TERMSBlast furnace hearth, cooling stave heat flux intensity, multi-information fusion, simulation, thermocouple, thickness detection JIAOCHEN MA was born in Shanxi, China, in 1979. He received the B.Eng. and M.Eng. degrees in mechanical engineering and the Ph.D. degree in detection technology and automation device from

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Section: ) Principle Of Thickness Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection of Blast Furnace Hearth Lining Erosion by Multi-Information Fusion

Wen

Zhao³

2021

IEEE Access

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“…To extend the service life of the blast furnace, it is necessary to carry out furnace protection operation when hearth localized depression erosion occurs [5], [14]. Common protective measures include limiting production, adding titanium ore [15], [16], and strengthening cooling intensity [17].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Relationship Between the Localized Depression Erosion of a Commercial Blast Furnace Hearth Lining and the Heat Flux of Cooling Staves

Chen

2019

IEEE Access

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The service life of a blast furnace hearth is considered as a key factor limiting the service life of a blast furnace. The erosion of the hearth lining is generally inhomogeneous, and localized depression erosion often occurs. Since the conditions inside the blast furnace hearth cannot be directly measured, it is a common practice to use the existing thermal parameters to estimate the erosion, which can provide a basis for the safe production of the blast furnace. In this context, based on the anatomical data of the No. 2 commercial blast furnace, the three-dimensional erosion model is established, and the feasibility of the computational model is verified. Then, 15 computational models with localized depression erosion at different locations are established. The finite element method is used to simulate the heat flux of the cooling staves of each model. The results show that under normal cooling and heat transfer conditions, the remaining thickness of the hearth lining is inversely proportional to the heat flux of the cooling staves. The closer the localized depression erosion is to the cooling stave, the greater the effect on the heat flux of the cooling stave. If the localized depression erosion is far enough away from the cooling stave, it will have little effect on the heat flux of the cooling stave. On this basis, we summarized a method of judging the location of localized depression erosion according to the relationship between the localized depression erosion and the cooling stave heat flux. It should be noted that when the localized depression erosion is located at the junction of the cooling staves, the increase in heat flux will not be too large, which is easily overlooked. In order to prevent the occurrence of safety accidents, we should pay more attention to this situation.

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“…Точность измерения толщины настыли находится в пределах 15 % физических измерений из-за большей неопределенности в скорости волны в настыли. Точность измерений методом AU-E подтверждена результатами керновых бурений на работающих доменных печах и непосредственными замерами на остановленных и охлажденных доменных печах как в России [14,15], так и за рубежом [16].…”

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“…AU-E метод применен и продолжает использоваться на более чем 70 доменных печах по всему миру. В России метод системно используется на 16 доменных печах Новолипецкого [14,15], Череповецкого [17], Нижнетагильского [7,8], Западно-Сибирского и Магнитогорского металлургических комбинатов.…”

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Experience and Development of Methods to Estimate Blast Furnace Refractory Lining Conditions

Gordon

Sadri

Mironov

et al. 2017

Izv. vysš. učebn. zaved., Čern. metall.

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Аннотация. В компании Хэтч (Канада) разработана система неразрушающего контроля остаточной толщины огнеупорной кладки доменной печи и электропечей цветной металлургии и ферросплавной промышленности, в основу которой положен метод отраженного акустикоультразвукового сигнала (AU-E). Данная система дополняет традиционное моделирование теплового состояния футеровки печи с использованием закладных термопар или по тепловой нагрузке на холодильники доменной печи и позволяет дополнительно определять положение трещин и аномалий, а также границу между гарнисажем и огнеупором. Рассмотрены ограничения и источники погрешностей в методе AU-E, представлено развитие и усовершенствование этого метода. Совершенствование метода позволило учесть влияние высоких температур, профиля печи и ее размеров, различие акустического сопротивления различных слоев многослойной огнеупорной футеровки на закономерности распространение волны. Метод AU-E является надежным и неразрушающим методом контроля состояния огнеупорной кладки плавильных печей. Аппаратное и программное обеспечение системы AU-E подверглось существенному усовершенствованию, позволившему получать результаты измерений с достаточной точностью. Оценка точности метода подтверждена физическими замерами на остановленных доменных печах. Приведены примеры использования системы диагностики состояния футеровки различными отечественными и зарубежными заводами, а также некоторые технологические мероприятия, позволяющие продлить кампанию доменной печи. Показано, что использование нескольких последовательных измерений позволяет определить скорость износа огнеупорной кладки и время вывода печи на капитальный ремонт. Метод AU-E успешно использовался (и используется) на более чем 70 доменных печах во всем мире, включая доменные печи Новолипецкого, Череповецкого, Нижнетагильского, Западно-Сибирского и Магнитогорского металлургических комбинатов, а также электропечах для выплавки ферросплавов, меди, платины и т. д.

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Extending the Campaign Life of an Intensively Operating Blast Furnace

Cited by 8 publications

References 1 publication

Detection of Blast Furnace Hearth Lining Erosion by Multi-Information Fusion

Detection of Blast Furnace Hearth Lining Erosion by Multi-Information Fusion

Numerical Study on the Relationship Between the Localized Depression Erosion of a Commercial Blast Furnace Hearth Lining and the Heat Flux of Cooling Staves

Experience and Development of Methods to Estimate Blast Furnace Refractory Lining Conditions

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