Magnetic separator concentrate box capable of being freely switched

The utility model belongs to the technical field of mining industry, and relates to a freely switchable concentrate box of a magnetic separator. Comprising a concentrate box, a switching valve and a switching valve hoisting unit, two discharge holes are formed in the bottom surface of the concentrate box and are respectively communicated with the two pump pools; the switching valve comprises a cone valve; a communicating pipe is arranged at the middle axis position of the cone valve; a fixed flange is mounted at the end part of the communicating pipe; the switching valve hoisting unit comprises a hoisting ring and a connecting rod; the lifting ring is mounted at one end of the connecting rod; a flange plate is arranged at the other end of the connecting rod; the switching valve hoisting unit is connected with the cone valve through cooperation of the flange plate and the fixing flange. Free switching between first-stage grinding and second-stage grinding is achieved based on improvement of existing equipment.