Abstract

Semi-industrial tests of the chloride sublimation technology for extracting lithium from petalite ore with concurrent production of cement clinker have been carried out. The main technical and economic indicators of production of lithium carbonate have been determined. Chloride sublimation roasting method allows combining ore roasting and lithium sublimation with the process of obtaining (roasting) Portland cement clinker. Thus, it becomes possible to distribute energy costs for high-temperature roasting over a much larger volume of products: clinker and lithium salts. The recovered lithium in the form of lithium chloride vapor is captured by an aqueous absorbing solution, which has a much smaller volume as compared to the volumes of leaching solutions in lime, sulfuric acid, or autoclave alkaline technologies. Correspondingly, the flows of the solutions being processed are reduced, which significantly saves reagents and energy during their processing and considerably reduces the capital costs of tank equipment. Owing to the high content of aluminum and silicon oxides in lithium aluminosilicate ores, it is possible to use them in the production of cement clinker instead of the clay component of the charge.

中文翻译：

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氯化物升华焙烧法从Petalite矿石中提取锂

摘要

已开展氯化物升华提锂同时生产水泥熟料的半工业试验。确定了生产碳酸锂的主要技术经济指标。氯化物升华焙烧法允许将矿石焙烧和锂升华与获得（焙烧）波特兰水泥熟料的过程相结合。因此，可以将高温焙烧的能源成本分配到更大体积的产品上：熟料和锂盐。以氯化锂蒸气形式回收的锂被一种吸收水溶液捕获，与石灰、硫酸或高压釜碱性技术中浸出溶液的体积相比，该溶液的体积要小得多。相应地，减少了正在处理的溶液的流量，从而在处理过程中显着节省了试剂和能源，并大大降低了罐设备的资本成本。由于铝硅酸锂矿石中铝和硅的氧化物含量高，因此可以在生产水泥熟料时使用它们来代替炉料中的粘土成分。