Slurry storing and mixing device

A slurry storage and stirring device comprising a container which stores a slurry containing particles and a solvent,

• wherein the container has an inner wall provided inside the container and formed of a porous body which passes a gas supplied to the container through the porous body to generate fine bubbles in the slurry,
• the porous body comprises pores having an average pore diameter which does not allow the solvent of the slurry to pass through the porous body,
• the container has a cylindrical portion having a cylindrical shape on an upper side in a vertical direction, and has a conical-shaped cone portion under the cylindrical portion;
• wherein the cone portion has a cross-sectional area gradually decreasing downward;
• wherein the cone portion has a top side and a bottom side and each inner surface of the top side and the bottom side are formed with inclined portions, and the porous body is disposed on the bottom side and occupies an area of 10% or more of inner surfaces of the entire inclined portions,
• the cone portion is configured by directly combining and connecting two components of a first cone portion on the bottom side and a second cone portion on the upper side;
• and
• the inner wall is only in the first cone portion;
• wherein at least a portion on the bottom side of the cone portion has a double structure of an inner body having the inner wall in at least a part of the inner body and an outer body provided outside the inner body, and the inner body has a bowl shape having a closed bottom.