Abstract:To study the effect of magnesium olivine on the compressive strength, phase composition and mineral structure of magnetite pellets, six groups of pellets were prepared by changing the content of olivine and the pellets were further subjected to the preheating and roasting processes in tube furnaces. Scanning electron microscopy-Energy dispersive spectrometer (SEM-EDS), X-Ray diffraction (XRD) and Mercury injection apparatus were used to characterise the microstructure and porosity of pellets. Results showed th… Show more
“…When the MgO-bearing flux content increased from 0% to 2%, the porosity of roasted pellets was increased from 18.61% to 24.06%. The increased porosity deteriorated the CCS of MgO-bearing pellets [49][50][51][52]. Moreover, MgO could activate the decomposition of haematite, reducing the decomposition temperature and accelerating the decomposition rate.…”
Section: Cold Compressive Strengthmentioning
confidence: 99%
“…Fan et al reported that when the MgO content of the pellets is 2.0%, the CCS improved by 1500 N pel −1 with the basicity increasing from 0.1 to 0.4 and the CCS increased by 700 N pel −1 with the B content increasing from 0% to 0.6% [56]. Figure 5. SEM diagrams of pellets with different magnesium olivine contents [52]. …”
Section: Study On Metallurgical Properties Of Flux Pelletsmentioning
The flux pellets as the burden materials of blast furnace have been widely investigated and used. However, its research and practical applications keep slowly developing in China due to the historical status of the sinter and the limitation of raw material condition. The sinter output is constrained by the environmental department due to its great emission of air pollutants. Therefore, enhancing the development of pellets becomes an urgent task for China's steel enterprises. Flux pellets shows excellent adaptability in ironmaking compared with acid pellet, but the investigation on its preparation and utilisation in China is far from enough. This review provides a summary of the current research status and application of flux pellets in China, which mainly focuses on the metallurgical properties and their interfering factors, as well as BF production indexes after using, hoping to provide a comprehensive understanding for flux pellets and push its technical progress continuously.
“…When the MgO-bearing flux content increased from 0% to 2%, the porosity of roasted pellets was increased from 18.61% to 24.06%. The increased porosity deteriorated the CCS of MgO-bearing pellets [49][50][51][52]. Moreover, MgO could activate the decomposition of haematite, reducing the decomposition temperature and accelerating the decomposition rate.…”
Section: Cold Compressive Strengthmentioning
confidence: 99%
“…Fan et al reported that when the MgO content of the pellets is 2.0%, the CCS improved by 1500 N pel −1 with the basicity increasing from 0.1 to 0.4 and the CCS increased by 700 N pel −1 with the B content increasing from 0% to 0.6% [56]. Figure 5. SEM diagrams of pellets with different magnesium olivine contents [52]. …”
Section: Study On Metallurgical Properties Of Flux Pelletsmentioning
The flux pellets as the burden materials of blast furnace have been widely investigated and used. However, its research and practical applications keep slowly developing in China due to the historical status of the sinter and the limitation of raw material condition. The sinter output is constrained by the environmental department due to its great emission of air pollutants. Therefore, enhancing the development of pellets becomes an urgent task for China's steel enterprises. Flux pellets shows excellent adaptability in ironmaking compared with acid pellet, but the investigation on its preparation and utilisation in China is far from enough. This review provides a summary of the current research status and application of flux pellets in China, which mainly focuses on the metallurgical properties and their interfering factors, as well as BF production indexes after using, hoping to provide a comprehensive understanding for flux pellets and push its technical progress continuously.
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