Method of mixing raw material for powder metallurgy, in particular for the manufacture of feedstock granules of a given type of ceramic from a particular mixture including, on one hand, at least one inorganic powder of at least one oxide or cermet or metal or nitride element or of at least one compound including at least one of said elements, and, on the other, at least one binder, whereby: - said method is carried out using a binder comprising: -- at least 35% by volume of a polymeric base, -- from 40 to 55% by volume of a wax mixture, -- 10% by volume of a surfactant, the total of said polymeric base and said wax mixture and said surfactant being equal to 100%, wherein the polymeric base contains copolymers of ethylene and methacrylic or acrylic acid, or copolymers of ethylene and vinyl acetate, or copolymers of ethylene comprising a maleic anhydride or a mixture of these copolymers, as well as polyethylene, polypropylene and an acrylic resin; - said particular mixture is introduced into a tank that includes a mixer including at least one mixing means; - said mixer is equipped with heat exchange means with a first heat exchange circuit for holding at a mixing temperature; - the temperature is stabilised, by connecting said heat exchanger to said first heat exchange circuit for holding at a mixing temperature, said tank and the contents thereof in the vicinity of a mixing temperature between a lower temperature (TINF) from which said particular mixture reaches the pasty state, and at an upper temperature (TSUP) below which said particular mixture should remain, and said heat exchange means are equipped with heating means arranged for heating said tank or/and the contents thereof at a temperature between said lower temperature (TINF) and said upper temperature (TSUP), said lower temperature (TINF) and said upper temperature (TSUP) being stored, for said particular mixture corresponding to a given type of ceramic, and said heat exchange means are controlled, such that said heating means exchange the energy, in a first connection, with said first heat exchange circuit for holding at a mixing temperature, that is installed external to said tank and such that the thermal inertia of said first circuit is greater than that of said tank with a full load of said particular mixture; - said mixing means is set in motion at a speed less than or equal to 700 revolutions per minute; - the mixing of said mixture is carried out until a homogeneous compact mass is obtained; - the stabilisation is stopped at a high temperature, greater than or equal to a temperature specific to the mixture in question and characteristic of a homogeneous compact mass, of said tank and of the contents thereof for which the lowering of the temperature is authorised. - said method is carried out using a binder comprising: -- at least 35% by volume of a polymeric base, -- from 40 to 55% by volume of a wax mixture, -- 10% by volume of a surfactant, the total of said polymeric base and said wax mixture and said surfactant being equal to 100%, wherein the polymeric base contains copolymers of ethylene and methacrylic or acrylic acid, or copolymers of ethylene and vinyl acetate, or copolymers of ethylene comprising a maleic anhydride or a mixture of these copolymers, as well as polyethylene, polypropylene and an acrylic resin; -- at least 35% by volume of a polymeric base, -- from 40 to 55% by volume of a wax mixture, -- 10% by volume of a surfactant, - said particular mixture is introduced into a tank that includes a mixer including at least one mixing means; - said mixer is equipped with heat exchange means with a first heat exchange circuit for holding at a mixing temperature; - the temperature is stabilised, by connecting said heat exchanger to said first heat exchange circuit for holding at a mixing temperature, said tank and the contents thereof in the vicinity of a mixing temperature between a lower temperature (TINF) from which said particular mixture reaches the pasty state, and at an upper temperature (TSUP) below which said particular mixture should remain, and said heat exchange means are equipped with heating means arranged for heating said tank or/and the contents thereof at a temperature between said lower temperature (TINF) and said upper temperature (TSUP), said lower temperature (TINF) and said upper temperature (TSUP) being stored, for said particular mixture corresponding to a given type of ceramic, and said heat exchange means are controlled, such that said heating means exchange the energy, in a first connection, with said first heat exchange circuit for holding at a mixing temperature, that is installed external to said tank and such that the thermal inertia of said first circuit is greater than that of said tank with a full load of said particular mixture; - said mixing means is set in motion at a speed less than or equal to 700 revolutions per minute; - the mixing of said mixture is carried out until a homogeneous compact mass is obtained; - the stabilisation is stopped at a high temperature, greater than or equal to a temperature specific to the mixture in question and characteristic of a homogeneous compact mass, of said tank and of the contents thereof for which the lowering of the temperature is authorised.