A process for measuring wear of a refractory lining of a receptacle intended to contain molten metal, containing the following steps: scanning a first surface of the refractory lining using a first laser scanner in order to obtain a first initial set of data representative of the first surface, scanning a second surface of the refractory lining using a second laser scanner, distinct from the first laser scanner, in order to obtain a second initial set of data representative of the second surface, wherein the second surface includes a grey zone for the first laser scanner, the receptacle defining an obstacle located between the first laser scanner and the grey zone during scanning by the first laser scanner, and calculating a final set of data using the first initial set of data and the second initial set of data, the final set of data being representative of a surface of the refractory lining including the first surface and the second surface.