The slag crust in high-temperature iron ore smelting

Frolova, I. B.; Minkin, V. M.; Frolov, V. A.; Yukhimenko, V. I.

doi:10.1007/bf01282327

Cited by 3 publications

(2 citation statements)

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“…In the long-term smelting practice, iron-smelting workers gradually realized that slag crusts are the best furnace lining to protect blast furnaces instead of refractory materials [1][2][3][4]. The super cooling capacity of cooling staves is the key to the formation of stable slag crusts [5].…”

Section: Introductionmentioning

confidence: 99%

Damage Mechanism of Copper Staves in a 3200 m3 Blast Furnace

Zuo

Wang

2018

Metals

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Copper staves have been widely applied in large blast furnaces especially those whose inner volumes exceed 2000 m3 due to high cooling capacity. In the past decade, copper staves suffered severe damages in some blast furnaces, which not only shortened their campaign lives, but also caused huge economic losses. In order to make out this phenomenon, the damage mechanism of copper staves was investigated via analyzing the chemical composition, thermal conductivity, metallographic aspects and microstructure in this paper. As a result, the working state was more likely to damage copper staves instead of their materials. At the beginning, the poor quality of the coke and the large bosh angle promoted the development of edge airflow, which intensified the erosion of refractory materials, resulting in the fall-off of slag crusts and damage of cooling water pipes. After repair, the cooling capacity of copper staves still declined, causing the temperature to rise easily; consequently, hydrogen attack happened when the temperature reached 370 °C, which degraded the performance of copper staves. Therefore, copper staves were worn too quickly to form slag crusts, which finally failed under the hydrogen attack and the scouring of the edge airflow at high temperatures.

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Section: Introductionmentioning

confidence: 99%

Damage Mechanism of Copper Staves in a 3200 m3 Blast Furnace

Zuo

Wang

2018

Metals

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“…A study of the rules of failure of melting furnace refractories must be made not only for technically correct modernization of the frunaces but also for optimization during design of the designs of matte and slag syphons and the upper portions of melting shafts [i], selection of the necessary refractories [2], revealing the conditions of formation on the surface of the lining of the wear resistant layer of lining slag fulfilling protective functions at gas flow temperatures of up to 3000 K [3] or under conditions of the action of aggressive iron oxides [4] such as by special cooling of it on cooling surfaces, and the behavior of the refractories with cooling of them [5] or with the use of a combined cooled and uncooled lining [6]. A study of the rules of failure of melting furnace refractories must be made not only for technically correct modernization of the frunaces but also for optimization during design of the designs of matte and slag syphons and the upper portions of melting shafts [i], selection of the necessary refractories [2], revealing the conditions of formation on the surface of the lining of the wear resistant layer of lining slag fulfilling protective functions at gas flow temperatures of up to 3000 K [3] or under conditions of the action of aggressive iron oxides [4] such as by special cooling of it on cooling surfaces, and the behavior of the refractories with cooling of them [5] or with the use of a combined cooled and uncooled lining [6].…”

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confidence: 99%