Incombustible withdrawing system

A fluidized-bed furnace system comprising:

• a fluidized-bed furnace to have a fluidized bed formed therein by a fluidized medium so as to combust, gasify, or pyrolyze material containing an incombustible;
• and
• an incombustible withdrawing system including
• (i) a mixture delivery path to deliver a mixture of the fluidized medium and the incombustible from a bottom of said fluidized-bed furnace,
• (ii) a fluidized-bed separating chamber disposed downstream of said mixture delivery path to fluidize the mixture by a fluidizing gas, and to separate the mixture into a first separated mixture having a high concentration of the fluidized medium and a second separated mixture having a high concentration of the incombustible,
• (iii) a conveyor in said mixture delivery path to deliver the mixture from the bottom of said fluidized-bed furnace to said fluidized-bed separating chamber,
• (iv) a return passage to return the first separated mixture to said fluidized-bed furnace,
• (v) an incombustible discharge passage to discharge the second separated mixture to an exterior of said fluidized-bed furnace, and
• (vi) a fluidized medium delivering device within said incombustible discharge passage,
• such that said incombustible discharge passage is to discharge the second separated mixture to the exterior of the fluidized-bed furnace by having the second separated mixture be delivered non-vertically upwardly in said incombustible discharge passage by said fluidized medium delivering device, and then discharged from said incombustible discharge passage, at a position higher than a surface of the fluidized bed when formed in the fluidized-bed furnace, to the exterior of the fluidized-bed furnace.