A facile route to the value-added utilization of ludwigite ore: boron extraction and MxMg1-xFe2O4 spinel ferrites preparation

You, Jinxiang; Wang, Jing; Peng, Zhiwei; Rao, Mingjun; Li, Guanghui

doi:10.1016/j.jclepro.2022.134206

Cited by 10 publications

(5 citation statements)

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“…The ore contains 49.80 wt % Fe total , 5.41 wt % B 2 O 3 , 13.89 wt % MgO, and 5.41 wt % SiO 2 . 12 The X-ray diffraction (XRD) pattern in Figure 1 shows that the main mineral phases are magnetite (Fe 3 O 4 ), lizardite (Mg 3 Si 2 (OH) 4 O 5 ), and szaibelyite (MgBO 2 (OH)). The anhydrous sodium carbonate (Na 2 CO 3 ) used in this study is an analytical reagent (AR), and the gases used (CO, CO 2 , O 2 , and N 2 ) are highly pure (>99.99 vol %).…”

Section: Methodsmentioning

confidence: 99%

“…Previous experimental results suggest that the suitable dosage of Na 2 CO 3 and the suitable roasting temperature for boron activation were 20 wt % and 1123 K, respectively. 12 The dry BIC was first ground to a particle size of less than 74 μm. Then, it was mixed with 20 wt % Na 2 CO 3 and pressed into cylinders with diameters of 10 mm and heights of 11 mm.…”

Section: Methodsmentioning

confidence: 99%

“…The BIC sample was acquired from Liaoning Shougang Iron Boron Co., Ltd., China. The ore contains 49.80 wt % Fe total , 5.41 wt % B 2 O 3 , 13.89 wt % MgO, and 5.41 wt % SiO 2 . The X-ray diffraction (XRD) pattern in Figure shows that the main mineral phases are magnetite (Fe 3 O 4 ), lizardite (Mg 3 Si 2 (OH) 4 O 5 ), and szaibelyite (MgBO 2 (OH)).…”

Section: Methodsmentioning

confidence: 99%

“…Previous experimental results suggest that the suitable dosage of Na 2 CO 3 and the suitable roasting temperature for boron activation were 20 wt % and 1123 K, respectively . The dry BIC was first ground to a particle size of less than 74 μm.…”

Section: Methodsmentioning

confidence: 99%

“…China’s boron consumption ranks first globally; however, more than three-quarters depends on imports. Boron-containing iron ore is the primary boron source for China, with a reserve of 0.18 billion tons, but its comprehensive and efficient utilization is still a challenge due to the low B 2 O 3 grade and the complex mineralogical association. − …”

Section: Introductionmentioning

confidence: 99%

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Phase Transformations and Microstructure Evolution of Soda-Ash Roasted Boron-Containing Iron Concentrate: A Comparative Investigation of Varying Roasting Atmospheres

You,

Li,

Wang

et al. 2023

Ind. Eng. Chem. Res.

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In the utilization of boron-containing iron concentrate (BIC), its complex mineralogical composition and finely disseminated mineral particles restrict its large-scale exploitation. Soda-ash roasting proves to be a practical approach for boron activation and extraction, wherein reactions among magnetite, silicates, and soda ash are involved, which affect the consumption of soda ash and the subsequent recovery of iron. This study investigates and compares the phase transformations, microstructure evolution, and magnetism changes of soda-ash roasted BIC under different roasting atmospheres. Results indicate that neutral (100 vol % N2) and weakly reductive atmospheres (50 vol % N2 + 5 vol % CO + 45 vol % CO2) regulated the iron species into the Fe3O4 and Mg x Fe3–x O4 phases with strong magnetism, respectively. In contrast, the iron species presented as interwoven Fe2O3 and MgFe2O4 under an oxidative atmosphere (79 vol % N2 + 21 vol % O2). When the roasting atmosphere was intensely reductive (100 vol % CO), the roasted ore consisted of sponge iron and Mg y Fe1–y O.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%