(FR2705103-A1)      Process for treating solid prods. contg. a low m.pt. metal, in which these prods. are:- heated in a prim. zone; thermally decomposed in a sec. zone under a sub-atmospheric pressure whilst collecting by a siphon, communicating with the outside, the liq. metal flowing from the prods., then reduced in a tert. zone. These three zones are isolated from each other and from the atmos. by airlock doors.    The installation used to put this process into service is also claimed and incorporates three sealed chamber interconnected by airlocks.    USE/ADVANTAGE -   The process is used for the thermal decomposition of a solid prod. contg. a low m.pt. metal, such as lead, and allow its recovery. Overcomes problems associated with conventional processes for such treatment. Allows continuous control of the residual prods., an excellent global energy balance; an automated treatment in a closed environment, with reduced handling and a great redn. in the harmful effects for the operators; the removal of all pre-treatments, such as the removal of acid from electrical batteries used as feedstock; the advantageous prodn. of an intermediate prod. with a high purity, limiting the importance and the cost of the finishing treatments needed with conventional processes. The process can be used for the recovery of metals such as lead, cadmium/nickel and zinc from waste batteries, used tyres and other organic wastes.    (WO9426941-A1)      Process for treating solid prods. contg. a low m.pt. metal, in which these prods. are:- heated in a prim. zone; thermally decomposed in a sec. zone under a sub-atmospheric pressure whilst collecting by a siphon, communicating with the outside, the liq. metal flowing from the prods., then reduced in a tert. zone. These three zones are isolated from each other and from the atmos. by airlock doors.    The installation used to put this process into service is also claimed and incorporates three sealed chamber interconnected by airlocks.    USE -   The process is used for the thermal decomposition of a solid prod. contg. a low m.pt. metal, such as lead, and allow its recovery.    ADVANTAGE -   Overcomes problems associated with conventional processes for such treatment. Allows continuous control of the residual prods., an excellent global energy balance; an automated treatment in a closed environment, with reduced handling and a great redn. in the harmful effects for the operators; the removal of all pre-treatments, such as the removal of acid from electrical batteries used as feedstock; the advantageous prodn. of an intermediate prod. with a high purity, limiting the importance and the cost of the finishing treatments needed with conventional processes. The process can be used for the recovery of metals such as lead, cadmium/nickel and zinc from waste batteries, used tyres and other organic wastes.    (JP8510011-W)      Process for treating solid prods. contg. a low m.pt. metal, in which these prods. are:- heated in a prim. zone; thermally decomposed in a sec. zone under a sub-atmospheric pressure whilst collecting by a siphon, communicating with the outside, the liq. metal flowing from the prods., then reduced in a tert. zone. These three zones are isolated from each other and from the atmos. by airlock doors.    The installation used to put this process into service is also claimed and incorporates three sealed chamber interconnected by airlocks.    USE -   The process is used for the thermal decomposition of a solid prod. contg. a low m.pt. metal, such as lead, and allow its recovery.    ADVANTAGE -   Overcomes problems associated with conventional processes for such treatment. Allows continuous control of the residual prods., an excellent global energy balance; an automated treatment in a closed environment, with reduced handling and a great redn. in the harmful effects for the operators; the removal of all pre-treatments, such as the removal of acid from electrical batteries used as feedstock; the advantageous prodn. of an intermediate prod. with a high purity, limiting the importance and the cost of the finishing treatments needed with conventional processes. The process can be used for the recovery of metals such as lead, cadmium/nickel and zinc from waste batteries, used tyres and other organic wastes.