Abstract Lithium is a strategic, future-bearing element due to its high-tech usages, mostly for batteries in electrical vehicles and devices, but is also rated with high supply risk. Due to high market prices, several resources are under (re)evaluation. A concentrate from the Argemela deposit in northern Portugal has an overall grade of 4.5% Li2O, and the carrier is montebrasite. The ore's grade is around 40% of the mineral, and the main gangue phases are quartz (also around 40%) and muscovite. Several other phosphates are associated with montebrasite, mainly planerite and childrenite. This makes the hydrometallurgical extraction of lithium from the concentrate challenging. An initial sulphuric acid roasting step was optimized at 800 °C, based on montebrasite data obtained by TGA, above the temperatures of dehydroxylation of planerite (340 °C) and decomposition of montebrasite (750 °C). Over 95% Li extraction from montebrasite concentrate was achieved by acid roasting and aqueous leaching under the operating conditions obtained, respectively, in laboratory scale: 800 °C and 15 min, 2 h leaching at room temperature (25 °C), which yielded leach liquors containing around 12 g/L Li. The residue, dominated by quartz and berlinite, keeps

中文翻译：

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从 montebrasite 精矿中提取锂：应用矿物学、火法和湿法冶金

摘要 锂是一种具有战略意义的、面向未来的元素，因为它具有高科技用途，主要用于电动汽车和设备中的电池，但也被评为具有高供应风险。由于市场价格高企，一些资源正在（重新）评估中。来自葡萄牙北部 Argelela 矿床的精矿的总品位为 4.5% Li2O，载体为 montebrasite。矿石品位约为矿物的 40%，主要脉石相为石英（也约为 40%）和白云母。其他几种磷酸盐与 montebrasite 相关，主要是行星石和儿童石。这使得从精矿中湿法冶金提取锂具有挑战性。根据 TGA 获得的 montebrasite 数据，在 800 °C 下优化了初始硫酸焙烧步骤，高于黄晶石脱羟基 (340 °C) 和 montebrasite 分解 (750 °C) 的温度。在实验室规模的操作条件下，分别通过酸焙烧和水浸法从 montebrasite 精矿中提取超过 95% 的锂：800 °C 和 15 分钟，在室温 (25 °C) 下浸出 2 小时，从而产生浸出含有约 12 g/L Li 的酒。残留物以石英和伯林石为主，保持