Potassium cryolite molten salt also has serious corrosion on inert anode and side lining materials, so it is necessary to further find suitable inert anode and side lining materials. One of the problems of potassium cryolite electrolyte is low conductivity, resulting in large ohmic drop. Although it can be compensated by adding LIF and other additives and reducing polar distance, the additives not only improve the conductivity, but also reduce the solubility of alumina and increase the primary crystallization temperature, At the same time, the reduction of polar distance also depends on the industrial application of wettable cathode.

In addition, in the process of low-temperature electrolysis, K + is enriched in the cathode and the electrolyte molecular ratio near the cathode increases, resulting in cathode crusting. The common phenomenon in the electrolysis process with potassium cryolite as electrolyte is that the cell voltage is high and fluctuates greatly, and the current efficiency is low.

Although the research on potassium cryolite electrolyte has received a certain degree of attention, compared with the research on sodium cryolite, it is far from enough. Only preliminary research has been carried out on its physicochemical properties, which has not been systematized. The existing data are few and imperfect, and the data reported in the literature are inconsistent. The existing research mainly focuses on the physicochemical properties such as conductivity, alumina solubility and primary crystallization temperature, but on density There are very few studies on physicochemical properties such as surface tension and viscosity, so it is necessary to further study the physicochemical properties of potassium cryolite. In addition, the thermodynamic data of potassium cryolite electrolyte system is relatively lack, and the understanding of molten salt structure is not in-depth. These aspects need to be further studied.

In addition to finding suitable inert anode materials, the industrial application of potassium cryolite electrolyte also needs more research on the electrolytic process and optimization process. In addition, the research on the corrosion and penetration of potassium salt to carbon cathode and wettable inert cathode is also one of the important conditions for its industrial application.