Fluorine removal method for rare earth concentrate

• Main Authors: LIAO CHUNXIAO, XIAO CHUANHU, RONG CHU, LONG YONG, XU CAIQIANG, MA CHAOYANG, WEI DALI
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a rare earth ore concentrate fluorine removal method which comprises the following steps: adding a liquid A into fluorine-containing rare earth ore, adjusting the concentration and pH value of the obtained mixed liquid A, adding the solution A into the mixed liquid A, stirring and leaching, washing with the solution A, and carrying out solid-liquid separation after filter pressing to obtain a solid which is the rare earth ore with low fluorine content. The invention aims to provide a simple and effective fluorine removal method aiming at the characteristic of high fluorine content of part of ion type rare earth mines in southern China, so that the fluorine content in the produced rare earth concentrate is ensured to be at a low level, and the subsequent processing production of rare earth is ensured to be smoothly carried out. 本发明公开了一种稀土精矿除氟方法，包括以下步骤：将液体A加入至含氟稀土矿中，并调节所得混合液A的浓度以及pH值，将溶液A加入到混合液A中，搅拌浸出后，使用溶液A进行洗涤，在压滤后进行固液分离，所得固体即为低氟含量的稀土矿。本发明的目的针对部分中国南方离子型稀土矿山氟元素含量较高的特点，提供一种简单有效的除氟方法，确保产出