Plant for the treatment and recovery of white slag resulting from steelmaking processes, comprising: - at least one basic frame positionable resting on a supporting surface; - at least one work chamber associated with said basic frame, movable in rotation around a relevant axis and configured to receive and treat the white slag resulting from steelmaking processes by means of a withering process, wherein said white slag is moved forward along at least one direction of treatment, said work chamber comprising: ▪ at least one loading portion provided with at least one inlet port through which said white slag is loaded; ▪ at least one cooling portion arranged downstream of said loading portion with respect to said direction of treatment and comprising: o at least one treatment channel of said white slag; and o cooling means comprising at least one coolant adapted to operate in conjunction with said treatment channel to cool said white slag contained therein so as to obtain at least one recovery powder; ▪ at least one sorting and separation portion of said recovery powder arranged downstream of said cooling portion with respect to said direction of treatment; characterized by the fact that said cooling portion comprises a plurality of treatment channels which are separate from each other and communicating with said loading portion, each of which is adapted to receive a part of said white slag as a result of the rotation of said work chamber, to cool and to convey it towards said sorting and separation portion, and by the fact that said cooling means are arranged to enfold at least partly each of said treatment channels and comprise at least one delivery channel which extends at least through said cooling portion to send the coolant towards said loading portion counter-currently with respect to said direction of treatment, at least one return channel which extends through at least said cooling portion and is arranged to surround said delivery channel to send the coolant towards the sorting and separation portion parallel to said direction of treatment and at least one inlet manifold arranged at the point where said loading portion is located and adapted to transfer the coolant from said delivery channel to said return channel, where said cooling means and said treatment channels rotate integrally with each other around said axis. - at least one basic frame positionable resting on a supporting surface; - at least one work chamber associated with said basic frame, movable in rotation around a relevant axis and configured to receive and treat the white slag resulting from steelmaking processes by means of a withering process, wherein said white slag is moved forward along at least one direction of treatment, said work chamber comprising: ▪ at least one loading portion provided with at least one inlet port through which said white slag is loaded; ▪ at least one cooling portion arranged downstream of said loading portion with respect to said direction of treatment and comprising: o at least one treatment channel of said white slag; and o cooling means comprising at least one coolant adapted to operate in conjunction with said treatment channel to cool said white slag contained therein so as to obtain at least one recovery powder; ▪ at least one sorting and separation portion of said recovery powder arranged downstream of said cooling portion with respect to said direction of treatment; ▪ at least one loading portion provided with at least one inlet port through which said white slag is loaded; ▪ at least one cooling portion arranged downstream of said loading portion with respect to said direction of treatment and comprising: o at least one treatment channel of said white slag; and o cooling means comprising at least one coolant adapted to operate in conjunction with said treatment channel to cool said white slag contained therein so as to obtain at least one recovery powder; o at least one treatment channel of said white slag; and o cooling means comprising at least one coolant adapted to operate in conjunction with said treatment channel to cool said white slag contained therein so as to obtain at least one recovery powder; ▪ at least one sorting and separation portion of said recovery powder arranged downstream of said cooling portion with respect to said direction of treatment; characterized by the fact that said cooling portion comprises a plurality of treatment channels which are separate from each other and communicating with said loading portion, each of which is adapted to receive a part of said white slag as a result of the rotation of said work chamber, to cool and to convey it towards said sorting and separation portion, and by the fact that said cooling means are arranged to enfold at least partly each of said treatment channels and comprise at least one delivery channel which extends at least through said cooling portion to send the coolant towards said loading portion counter-currently with respect to said direction of treatment, at least one return channel which extends through at least said cooling portion and is arranged to surround said delivery channel to send the coolant towards the sorting and separation portion parallel to said direction of treatment and at least one inlet manifold arranged at the point where said loading portion is located and adapted to transfer the coolant from said delivery channel to said return channel, where said cooling means and said treatment channels rotate integrally with each other around said axis.