Method for preparing lithium carbonate by pelletizing and roasting lepidolite

The invention provides a method for preparing lithium carbonate by pelletizing and roasting lepidolite, and relates to the technical field of preparation of lithium carbonate from lepidolite. The method for preparing the lithium carbonate by pelletizing and roasting the lepidolite comprises the processes of mixing, pelletizing, roasting, crushing, leaching, filtering and concentrating, and removing impurities and precipitating lithium, the lithium ion leaching rate is high, and the purity of the lithium carbonate is high. According to the method, the sulfur and the lepidolite are adopted for pelletizing and roasting, so that energy is saved, the transformation rate and the leaching rate of lithium ions are improved, the purity of obtained lithium carbonate is high, and the development strategy of green manufacturing is met. 本发明提供一种锂云母造团焙烧制备碳酸锂的方法，涉及锂云母制备碳酸锂技术领域。一种锂云母造团焙烧制备碳酸锂的方法，包括将混料、造团、焙烧、破碎、浸出、过滤浓缩、除杂沉锂工艺，锂离子浸出率高、碳酸锂纯度高。本发明通过采用硫磺与锂云母造球焙烧不仅节约能源，还提高了锂离子的转型率和浸出率，并且得到的碳酸锂纯度高，符合绿色制造的发展战略。