The invention provides a wet method roller type disintegrating mill and a grading closed-circuit process thereof. The wet method roller type disintegrating mill comprises a
millstone, milling rollers, a motor, a hydraulic
system, a
rocker arm, a striker plate and a material receiving groove. The milling rollers are located on the upper surface of the
millstone and make contact with the
millstone. The milling rollers are connected with the
rocker arm. The
rocker arm is connected with the hydraulic
system. The millstone is connected with the motor through a transmission device. A grading device is connected to a material receiving
pipe. The invention further provides an application method for the wet method roller type disintegrating mill. According to the wet method roller type disintegrating mill provided by the invention, the characteristics of a dry method roller type disintegrating mill and the process characteristics of wet method grading are combined, disintegrating milling is conducted through the high-pressure rollers under the condition that the
water content of
slurry concentration is 30%-70%, a wind grading
system of the dry method roller type disintegrating mill is removed, and primary wet method grading is conducted through a baffle or a screen plate in the mill. The wet method roller type disintegrating mill and the grading closed-circuit process thereof are capable of meeting the
beneficiation process technical requirements, improving the disintegrating milling efficiency and reducing the
power consumption and steel consumption of disintegrating milling.