Investigation of End-of-Life Chrome-Magnesia Refractories Using X-Ray Computed Tomography

Iida Pankka*, Muhammad Saboor Ahmed, Joonas Tammela, Pekka Taskinen, Daniel Lindberg

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

4 Lataukset (Pure)

Abstrakti

The lifespan of refractory linings is a major industrial concern for safety, on-line availability, and financial reasons. In copper smelting, batchwise operating matte converters are the furnaces that pose the greatest challenge when it comes to refractory wear and lining life. In this work, the structure and morphology of used magnesia–chrome bricks were studied using X-ray computed tomography and mineralogical techniques. The bricks were taken from various locations of an end-of-life brick lining of an industrial Peirce–Smith converter, after a normal campaign at Boliden Harjavalta smelter (Finland). The results show that it is possible to visualize in 3D, e.g., porosity, metal-containing phases, and refractory magnesia in the used bricks. Different digital images, such as cross-sections and average volume fractions, were used as a non-destructive method to characterize the bricks’ internal structure. The metal/matte infiltration in the open porosity was found to differ based on the location in the converter, with some bricks having no metal/matte infiltration and the tuyere line showing metal/matte infiltration at a depth of about 100 mm from the hot face.

AlkuperäiskieliEnglanti
Sivut6650-6659
Sivumäärä10
JulkaisuJOM
Vuosikerta76
Numero11
Varhainen verkossa julkaisun päivämäärä3 syysk. 2024
DOI - pysyväislinkit
TilaJulkaistu - marrask. 2024
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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