Lead oxide powder, known as lead(II) oxide, is a vital chemical compound widely used in various industrial applications due to its unique properties and functions. It comes out of a rotary kiln that processes used batteries and recovers antimoniated lead. It uses the gas and dust treatment system, with a bag filter, described by SLY. It is not crushed slag. It also has a dust that comes from a fixed, non-rotating, vertical cupola furnace that uses anthracite as fuel and flux. The powders and gasses pass through the same system, obtaining a blacker powder – due to the carbon – with greater Pb content.