Method for preparing high-purity lithium carbonate from crude lithium carbonate

According to the method for preparing the high-purity lithium carbonate from the crude lithium carbonate, the high-purity lithium carbonate is prepared from the crude lithium carbonate through external field coupling size mixing and water washing, shearing carbonization, ion exchange impurity removal and shearing thermal decomposition, and high-valued utilization of lithium-containing resources is achieved. The method has the outstanding advantages of high raw material adaptability, high impurity removal efficiency, low reagent consumption, high metal recovery rate, cleanness, environmental protection and the like. 本发明提供了一种由粗碳酸锂制备高纯碳酸锂的方法，将粗碳酸锂经外场耦合调浆水洗-剪切碳化-离子交换除杂-剪切热分解制得高纯碳酸锂，实现含锂资源的高值化利用，本发明方法工艺简单，具有原料适应性强、除杂效率高、试剂消耗量低、金属回收率高、清洁环保等突出优点。