The Impact of Redox Atmosphere on the High-Temperature Melting Behavior of Basalt Materials
2025
Kaiwen Shi | Guanli Xu | Di Wu | Zhen Li | Hao Wang | Huaiming Liu | Jie Li | Jiangfan Liang
This study systematically reveals the fundamental mechanisms controlling redox-induced phase transformations occurring in basalt melting processes via integrated high-temperature redox experiments combined with thermodynamic simulations. Our findings demonstrate that oxidizing conditions drive clinopyroxene dissolution and concurrent crystallization of refractory phases&mdash:hematite [(Fe,Ti,Al)2O3] and magnesioferrite [(Mg,Fe)(Fe,Al)2O4]&mdash:where distinct crystallization pathways govern magnesioferrite morphology evolution. Conversely, reducing environments suppress oxide mineral formation while promoting phase transformation from high-melting-point plagioclase to low-melting-point clinopyroxene solid solutions, thus lowering the system&rsquo:s liquidus temperature to achieve full melting. This provides a theoretical basis for optimizing energy consumption in basalt fiber production and offers new insights into the effects of material melting temperature.
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