A certain beneficiation plant uses an FFP horizontal fast opening mining filter press produced by a certain company to dehydrate lithium mica concentrate. It has the characteristics of small equipment footprint, high processing efficiency, and low moisture content of lithium mica concentrate. At the same time, it can reduce the transportation cost of lithium mica concentrate and the drying cost of downstream lithium carbonate plants. This article focuses on the influence of the type of filter press cloth, cycle time, working pressure, type of filter aid for lithium mica concentrate, and amount of filter aid on the moisture content of lithium mica concentrate in fast opening filter press filters, membrane filter press.