Oil liquid concentrated recovery system used for mill

The invention relates to the technical field of mine building material equipment and discloses an oil liquid concentrated recovery system used for a mill. The oil liquid concentrated recovery system comprises a waste oil recovery pump station (10), a waste oil valve set (5), a waste oil recovery tank (1.2) and an oil discharging pump station (11); the output end of the waste oil recovery pump station (10) connected with the tail end of an oil liquid concentrated injection system is communicated with the input end of the waste oil valve set (5) through a pipeline; the output end of the waste oil valve set (5) is communicated with the waste oil recovery tank (1.2) through a pipeline; and the output end of the waste oil recovery tank (1.2) is communicated with the oil discharging pump station (11) through a pipeline. By means of combination with the oil liquid concentrated injection system, the injection and oil liquid recovery time can be greatly shortened. A hydraulic element and host equipment are not prone to damage, the equipment running rate is increased, and running reliability is improved. Oil liquid is long in service life, and long-time use cost is low.