中南大学学报（自然科学版）2025，Vol.56Issue(2)：468-477,10.DOI:10.11817/j.issn.1672-7207.2025.02.006
白云鄂博铌粗精矿相重构过程中钙贝塔石的生长行为
Growth behaviors of calciobetafite during phase reconstruction process of Bayan Obo niobium rougher concentrate
摘要
Abstract
Aiming at the problem of the small particle size of niobium-rich minerals(calciobetafite)during the phase reconstruction process of Bayan Obo niobium rougher concentrate and difficult sorting,the growth behaviors of calciobetafite at different temperatures were studied for designing the technological parameters.The isothermal growth behavior of calciobetafite at 1 140℃to 1 245℃with time extension was studied by using the high-temperature quenching method.The results show that the calciobetafite does not crystallize when the temperature is at 1 245℃and the time 3 h.And hematite,pseudobrookite crystallize before the formation of calciobetafite.When the temperature decreases from 1 230℃to 1 140℃,the crystalline fraction of calciobetafite gradually increases,while the maximum equivalent diameter of calciobetafite decreases.Additionally,with the increase of temperature,the incubation time required for the initial nucleation of calciobetafite also increases.The temperature from 1 200℃to 1 230℃is beneficial to the growth of calciobetafite,and the temperature from 1 140℃to 1 170℃is conducive to the nucleation.Increasing the holding time at 1 230℃during the cooling process is beneficial for achieving a high maximum equivalent diameter of calciobetafite(98.01 μm).关键词
相重构/生长行为/钙贝塔石/白云鄂博铌粗精矿/冷却结晶Key words
phase reconstruction/growth behavior/calciobetafite/Bayan Obo Nb rougher concentrate/cooling crystallization分类
矿业与冶金引用本文复制引用
韩文生,冉孟杰,卢翔,陈雯..白云鄂博铌粗精矿相重构过程中钙贝塔石的生长行为[J].中南大学学报（自然科学版）,2025,56(2):468-477,10.基金项目
国家自然科学基金资助项目(92062223) （92062223）
国家重点研发计划项目(2021YFC2901200)(Project(92062223)supported by the National Natural Science Foundation of China （2021YFC2901200）
Project(2021YFC2901200)supported by the National Key Research and Development Plan) （2021YFC2901200）
