Drying apparatus for powder raw material for manufacturing secondary cell with electric heater

A drying apparatus for a powder raw material for manufacturing a secondary cell with an electric heater, the drying apparatus comprising:

• a main body forming a chamber in which the powder raw material is accommodated;
• a rotation shaft provided rotatably inside the main body and on which a blade is mounted for agitation of the powder raw material;
• and
• the electric heater installed on an outer surface of the main body and providing heat so that the powder raw material is dried, the electric heater including a cable-type heater;
• and
• a heater fixing device for fixing the electric heater to the main body of the apparatus,
• wherein the main body includes a cylindrical portion accommodating the rotation shaft and having a cylindrical shape, and first and second sidewalls forming both sidewalls of the cylindrical portion,
• wherein the cylindrical portion and the first and second sidewalls include a plurality of heating regions partitioned to be heated by the electric heater, and
• wherein the electric heater includes a plurality of heaters disposed in the plurality of heating regions and independently controllable with different outputs from each other,
• wherein the cable-type heater is wrapped around an installation surface of the main body, extended by bending, or installed to be round with a spiral shape such that the cable-type heater includes a plurality of heater lines, and
• wherein the heater fixing device includes:
• a bolt inserted into the installation surface of the main body and disposed between first and second heater lines of the plurality of heater lines, spaced apart from each other;
• a bracket into which the bolt is inserted and forming a groove portion covering at least a portion of the first heater line;
• and
• a nut fastened to the bolt and pressing the bracket toward the first heater line.