Abstract: Flotation is one of the most important methods in non-ferrous metal beneficiation, covering more than 90% of domestic beneficiation plants. In order to further separate ore elements, it is necessary to add various reagents to cause chemical and physical reactions in the slurry to further improve the beneficiation efficiency. At present, how to accurately, quantitatively, stably, automatically and harmlessly add agents has become a requirement for factory selection. At present, there are many kinds of flotation dosing machines, such as injection pumps, electromagnetic valves, diaphragm metering pumps and so on. The injection pump dosing machine has the problems of large error and not humanized use method. Electromagnetic valve dosing machine has the problems of easy to plug the pipeline, a certain height difference between the installation position and the dosing point, and harsh installation conditions. The diaphragm metering pump also has some problems such as frequent calibration, multiple use of wearing parts and high maintenance cost. Based on the above background conditions, BGRIMM Technology Group has recently designed and developed a new dosing machine based on multi-frequency magnetic drive pump, which has completed industrial tests and been put into use in a selection plant. Multi-frequency magnetic drive dosing machine is based on vortex dosing principle and equipped with algorithm, which can realize calibration-free. Based on PID, automatic flow correction, stable and reliable. No conventional wearing parts. Equipped with filter device, can automatically filter impurities. User-friendly human-machine interface, easy to use. High degree of automation, small maintenance. Remote monitoring can be realized by PLC. Low maintenance cost. Multi-frequency magnetic drive dosing machine can bring considerable economic benefits for the selection of plants.