Method for preparing lithium carbonate from lepidolite

• Main Authors: WANG YAO, LIU SHANJUN, CUI HAO, PENG YUCHEN, QIU XUEQIANG, ZHONG CAINI
• Format: Patent
• Language: Chinese; English
• Published: 13.08.2024
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a method for preparing lithium carbonate from lepidolite, and relates to the technical field of ore lithium extraction. The invention discloses a method for preparing lithium carbonate from lepidolite. The lithium carbonate is prepared from the lepidolite through brick pressing, roasting, crushing and grinding, leaching, impurity removal, extraction and lithium precipitation. According to the method for preparing the lithium carbonate from the lepidolite, the yield of the smelting slag is reduced, the direct recovery rate of the lithium carbonate is increased, the unit cost is reduced, and the efficiency is improved by changing the category and the dosage of roasting auxiliary materials, replacing evaporation concentration with extraction and other process innovations. 本发明提供一种锂云母制备碳酸锂方法，涉及矿石提锂技术领域。一种锂云母制备碳酸锂方法，是将锂云母通过压砖-焙烧-破磨-浸出-除杂-萃取-沉锂制备得到碳酸锂。本发明的锂云母制备碳酸锂方法，通过改变焙烧辅料类别和用量、运用萃取替代蒸发浓缩等工艺革新降低冶炼渣的产量，提升碳酸锂的直收率、降低单位成本、提高效率。