The residence time, pulp volume and flotation kinetics play a vital role in determining the selection of the number of cells required in a flotation circuit. To prevent loss of floatable coal along with tailings, it is advisable to put cells in series. Fig. 5.34 indicates the coal recovery through multiple cells (in series) in XFD Series Single Flotation Cell is provided for flotation of minor ore samples in labs of geological,metallurgical,chemical and other industries. Application of XFD Flotation Machine Laboratory XFD Series single grooved flotation machine is used to the geology, metallurgy, building materials , chemical industry and many other industries.