Plate frame laminated filter is a classic and efficient pressurized filtration device, widely used for its sturdy structure, large filtration area, and high solid content of filter cake. It consists of multiple hollow filter plates and solid filter frames that are alternately compressed under strong force, forming a series of independent filter units. This device is particularly suitable for filtering suspensions with high solid content and uneven particle size, and can form a dry filter cake for effective washing. With its reliable performance and wide adaptability, it is a fundamental and important solid-liquid separation choice in fields such as chemical, mining, metallurgy, and environmental sludge treatment.