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2025 Vol. 46, No. 1
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JU Jiantao, LI Jianyi, XING Xiangdong. Effect of Basicity on Pelletizing Mechanism of Barium Bearing Magnetite[J]. Multipurpose Utilization of Mineral Resources, 2025, 46(1): 188-193. doi: 10.3969/j.issn.1000-6532.2025.01.025
Citation: JU Jiantao, LI Jianyi, XING Xiangdong. Effect of Basicity on Pelletizing Mechanism of Barium Bearing Magnetite[J]. Multipurpose Utilization of Mineral Resources, 2025, 46(1): 188-193. doi: 10.3969/j.issn.1000-6532.2025.01.025
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Effect of Basicity on Pelletizing Mechanism of Barium Bearing Magnetite

  • School of Metallurgy Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China

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Received Date:  14 March 2022
Publish Date:  25 February 2025
    Abstract

  • In this article, the effect of basicity on the compressive strength of barium bearing pellets was studied by adding a certain proportion of Ca(OH)2 with barium bearing magnetite concentrate powder and bentonite as raw materials. The consolidation mechanism of barium bearing pellets was analyzed by means of X-ray diffrotometer, scanning electron microscope-energy spectrometer and synchronous thermal analyzer. The results show that with the increase of basicity, the compressive strength of barium-bearing pellets increases first and then decreases, and reaches the maximum value of 3 292.8 N/ pellet when the basicity is 0.8, while the porosity of pellets shows an opposite trend and the minimum porosity is 21.6%. CaO decomposed by Ca(OH)2 reacts with Fe2O3 and SiO2 respectively to form CaFe2O4 and CaSiO3, and a small amount of Ca2FeO4 fills the pores to reduce the porosity of the pellets and increase the compressive strength. BaSO4 is decomposed into BaO and SO2, and BaO reacts with Fe2O3 to form BaFe2O4. SO2 gas escapes from inside the pellet, reducing the compactness of the pellet matrix, resulting in loose and porous microstructure of the pellet.

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