An electrolyte for use in electrochemical cells is provided. The plant is peculiar in that the inlet opening for introducing preheated raw meal from the next-to-last cyclone into the gas duct which connects the separating cyclone to the last cyclone in a vertical plane is located under at least one inlet opening for introducing preheated raw meal from the last cyclone into the calciner. 1 to 10 wt % of a carbon-based material, 1 to 40 wt % of an inorganic filler, and 5 to 95 wt % of a vehicle. The subjects can form scenery on a stage or be on the inside back cover of a book with the screen mounted across the front.