Method for efficiently leaching, removing impurities and enriching lithium from clay type lithium ore

• Main Authors: LIU SHUANG, KANG JIAN, DONG XUELIN, XIONG YUXIANG, TONG SHUOYUN, HUANG PENG, YUAN YAN, CUI PEILONG
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2023
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; 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 belongs to the technical field of pyrogenic process and wet process comprehensive smelting of clay type lithium ores, and particularly relates to a method for efficiently leaching, removing impurities and enriching lithium from the clay type lithium ores. Lithium is extracted through a medium-temperature roasting-hydrochloric acid leaching process, then a spray roasting process is used, so that the main metal element aluminum in a leaching solution forms an aluminum oxide product in an oxide form, and lithium, calcium, magnesium and the like are in a chloride form. And lithium chloride is separated from main metal impurities by utilizing the characteristic that lithium chloride is dissolved in organic solvents such as ethanol, so that a lithium chloride solution with relatively high purity is obtained. The method well solves the problem of loss caused by the fact that lithium and aluminum easily form coprecipitation in a traditional process for preparing lithium carbonate by extracting lithium t