Patent ID: 8246841

Claim:
A method for the separation of solids from a semi-solid viscous mass including magnox fuel sludge, said method comprising: a) introducing a solid-containing semi-solid viscous mass including magnox fuel sludge in an apparatus, wherein the apparatus comprises: i) a separating member, wherein the separating member comprises a solid flat plate having four edge sides, wherein three of the four edges comprise a perimeter member wherein the fourth edge side does not include a perimeter member wherein the perimeter members are disposed substantially perpendicularly to the solid flat plate; ii) supporting members comprising leaf springs and attached to the separating member on two sides of the solid flat plate, wherein the supporting members are positioned perpendicular and adjacent to the fourth edge side and wherein in operation the fourth edge side is disposed above the horizontal and the solid flat plate slopes down from the fourth edge side to the parallel opposite side of the member which is disposed below the horizontal; and iii) mechanical or electromagnetic force means for vibrating the separating member thereby providing directional vibrational motion through inclination of the leaf springs positioned between the separating member and supporting member so that the separating member is moved through an arc imparting vibrational motion having both a vertical component in an upward direction and a horizontal component in the direction of the fourth edge of the separating member; and b) vibrating the solid-containing semi-solid viscous mass including magnox fuel sludge in the separating member to cause the solids on the surface of the separating member to leave contact with the surface and be thrown forwards towards the fourth edge of the separating member until the solids reach the edge and are removed under the influence of gravity, thereby facilitating separation of said solids from said semi-solid viscous mass without dilution of said semi-solid viscous mass.