Directional dissolution treatment method for high-aluminum waste lithium battery cathode material

The invention discloses a directional dissolution treatment method for a high-aluminum waste lithium battery cathode material. The method comprises the following steps of: removing impurities such as aluminum in the high-aluminum waste battery cathode material by adopting a sodium salt melting method; and directionally dissolving out effective metal elements such as aluminum, iron, sodium and lithium in different processes. According to the method disclosed by the invention, the loss rate of lithium is greatly reduced, the purity of the purified solution is improved, the reaction is performed at the temperature of 500 DEG C or below, the reaction temperature is reduced, the energy consumption is low, the process is simple and easy to control, the cost is low, and the method has obvious economic benefits. 本发明公开了一种高铝废旧锂电正极材料定向溶出处理方法，针对高含铝废旧电池正极材料，采用熔融钠盐的方法，将其中的铝等杂质除尽；并于不同工序定向溶出铝、铁、钠、锂等有效金属元素。本发明极大地降低了锂的损失率，提高净化液的纯度，于500℃以下反应，降低反应温度，耗能低，工艺简单，易控制，成本低，具有显著的经济效益。