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| Study on technology of increasing oxygen lance life |
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Received:June 21, 2017
Revised:June 22, 2017
Accepted:June 26, 2017
Published Online:March 29, 2018
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| DOI： |
| KeyWord:Lance life;Lance material;Spray material;Nozzle structure |
| Author | Institution |
| suruijuan |
Gansu Vocational &Technical College of Nonferrous Metallurgy, |
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| Abstract: |
| BOF oxygen lance systems are an integral part of the production. Due to poor oxygen lance work environment, coupled with the misuse of workers, resulting in deformation of oxygen lance nozzle leaks and Barrel stick steel nodulation problems often occur. In this paper, characterized by SEM, SEM and XRD spectra lance samples were analyzed. SEM characterization analysis shows that oxygen lance surface cracks. Samples analyzed by X-ray diffraction to obtain the main phase composed of Ni, Cr, Fe, Mn, Zn oxide of each component. SEM spectroscopy samples were analyzed primarily substrate and buffer elements Ni, Cr and Fe; but SEM EDS analysis showed that the nickel content of the surface of the lance is zero, mainly Cr, Fe, Mn, Zn, O formation compounds, consistent with the results of XRD phase analysis. And Nickel is an important alloying elements, can improve the strength and corrosion resistance of steel. Therefore, the lance nickel surface disappear, the lance reasons direct result of cracks, thereby reducing the life of the lance. Therefore, optimizing the structure design and perfect coating materials to ensure the stability of the lance their material properties, thereby increasing the life of the lance, the actual production has played a certain significance. |
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