Online dilution device for concentration of hexavalent chromium in cement

The utility model relates to the technical field of cement processing, in particular to an online diluting device for hexavalent chromium concentration in cement, which comprises a mixing box, an annular pipe and a reducing agent box, a controller is arranged on the front end face of the mixing box, a rotating shaft is rotatably mounted on the inner wall of the upper end of the mixing box, and a stirring rod is arranged on the rotating shaft. An air outlet is formed in one side of the upper end face of the mixing box, a filter screen is arranged in the air outlet, the annular pipe is installed on the inner wall of the mixing box, an inclined discharging port is formed in the inner ring of the annular pipe, the reducing agent box is installed at the side end of the mixing box, an observation window is arranged at the front end of the reducing agent box, and a capacity marking line is arranged on the observation window. A discharging pipe is arranged at the lower end of the reducing agent box, an electromagneti