| http://www.w3.org/ns/prov#value | - Thus, there is a problem in that the yearly output and real yield of zinc decline.SUMMARY OF THE INVENTIONTherefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a fluidized bed roaster with a stabilized fluidized bed for roasting zinc concentrate, which can have a uniform internal temperature distribution to form a stab
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