
Double Impeller Leaching Agitation Tank For Wolframite
Us3834860a Apparatus For Heating And Calcining Of. An apparatus for preheating or calcining of powder andor pulverized materials in which a cylindrical combustion furnace comprises a precombustion chamber and a main combustion chamber air inlet pipes are connected tangentially to said respective chambers in order that the air for use in combusting blown in said chambers from said air inlet
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