An integrated and efficient process for borax preparation and magnetite recovery from soda-ash roasted ludwigite ore under CO–CO2–N2 atmosphere

You, Jinxiang; Wang, Jing; Rao, Mingjun; Zhang, Xin; Luo, Jun; Peng, Zhiwei; Li, Guanghui

doi:10.1007/s12613-023-2643-4

Cited by 3 publications

(1 citation statement)

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“…However, the synchronous grinding–leaching recovery rate of boron was only around 70% [ 30 , 34 ]. Moreover, most existing studies have focused narrowly on examining empirical parameters regarding the roasting reaction mechanism, including roasting temperature, roasting time, and atmospheric conditions [ 35 , 36 ]. There has been little investigation into improving the boron leaching rate and leaching mechanism.…”

Section: Introductionmentioning

confidence: 99%

Water Leaching Kinetics of Boron from the Alkali-Activated Ludwigite Ore

Liang,

Hu,

Xiao

et al. 2024

Molecules

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The primary aim of this study was to investigate the boron leaching process from alkali-activated ludwigite ore. Initially, the ore underwent activation through roasting at 1050 °C for 60 min with 20% sodium carbonate. Subsequently, the study examined the influence of leaching parameters, including temperature, time, liquid-to-solid ratio, and particle size, using the activated ore as the raw material. Additionally, water leaching characteristics of the residues and boron kinetics were analyzed. The results demonstrated that boron leaching efficiency reached 93.71% from the reduced ludwigite ore under specific conditions: leaching temperature of 180 °C, leaching time of 6 h, liquid-to-solid ratio of 8:1, and feed particle size of 52.31 μm (average particle size). Leach residue characteristics indicated the dissolution of minerals during the process. The boron behavior during water leaching followed the Avrami Equation, and the kinetics equation was derived by fitting the leaching data. Moreover, the activation energy (Ea) value for boron leaching was determined to be 8.812 kJ·mol−1 using the Arrhenius Equation, indicating that the leaching process is controlled by diffusion.

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