关键词: 铝土矿, 有益元素, 伴生元素, 评价模型, 可利用性, 大佛岩铝土矿床

Abstract: A detailed investigation of the Dafoyan bauxite deposit in Nanchuan District, Chongqing, was conducted to assess the distribution of beneficial components and associated elements. The study established a mineral resource availability evaluation model based on field investigations and sample analyses. High Ga quality scores are distributed in a northeast and nearly north-south direction, with higher Ga in the central and western regions and lower Ga in the northeast and eastern regions. The Li mass fraction is highest in the upper part of the Liangshan Formation, dense bauxite having the highest, followed by bauxite rock, and lower in soil bauxite. The enrichment of Li is closely related to bauxite. The enrichment sites of rare earth elements are more likely to occur at the bottom of the ore bearing strata. The evaluation model shows that bauxite resources in the mining area are exploitable. In developing and utilizing bauxite resources, the recovery and utilization of Ga elements can be considered. However, limitations in Li, Sc, and REE elements caused by factors such as beneficiation technology and beneficiation costs pose economic bottlenecks, despite the feasibility of current recycling technology. Therefore, alongside developing and utilizing bauxite resources, exploring more cost-effective recycling and utilization technologies is crucial to improve resource utilization efficiency. This evaluation model, with an an index system, can provide scientific guidance for bauxite resource utilization and evaluation, as well as for the evaluation of other mineral resources. Adjusting and optimizing evaluation indicators and weights according to specific mineral resources and scenarios is necessary to better serve practical needs.

Key words: bauxite, beneficial element, associated element, evaluation model, availability, Dafoyan bauxite deposit