A dispersing device is provided by which a dispersion with a high yield and a proper dispersing process can be carried out. The dispersing device causes a mixture of a slurry or a liquid to flow by centrifugal force toward an outer circumference between a rotor and a stator. It comprises a container, a cover assembly that closes an upper opening of the container, a stator that is fixed under the cover assembly, a rotor that is disposed to face a lower surface of the stator, and an assembly for supplying the mixture that stores an unprocessed mixture to be supplied to a gap between the rotor and the stator. The assembly for supplying the mixture has a body, a first member for injecting the mixture, and a second member for injecting the mixture.

A fluid mixing system may include a fluid inlet, a gas inlet, a common outlet, and a mixing chamber. The mixing chamber may be defined between a stator and a magnetically levitated rotor. The rotor may be configured to rotate relative to the stator. The mixing chamber may include an uneven surface. The mixing chamber may operatively couple the fluid inlet and the gas inlet to the common outlet.

Apparatus for mixing a powdered material with a liquid that includes a housing in which a working space having an inner wall is arranged and a rotatably-driven rotor being arranged in the working space. The rotatably-driven rotor includes a blade ring and bars, which are pointing toward the inner wall and are arranged at different positions in a circumferential direction of the rotor. The apparatus also includes a feed opening for the powdered material being arranged above the blade ring and an annular gap connectable to a liquid supply arrangement being arranged below the blade ring. In a direction parallel to an axial direction of the rotor, the bars one of connect to one another or overlap one another.

Provided herein are methods for preparing fibrillar polymeric scaffolds, compositions comprising fibrillar polymeric scaffold, and an apparatus comprising two concentric cylinders, a rotating inner cylinder powered by a motor, and a stationary outer cylinder.

The present invention relates to a method of preparing a positive electrode active material precursor for secondary batteries which allows maintenance of the crystallinity of an obtained positive electrode active material precursor at a high level while allowing control of a particle diameter of the positive electrode active material precursor. More particularly, the method of preparing a positive electrode active material precursor for secondary batteries includes (1) a preparation step of preparing a continuous-type reactor that includes a non-rotatable cylinder, inside which a reaction chamber is included; a stirring motor disposed at one side of the non-rotatable cylinder; a stirring rod that is coupled with a motor shaft of the stirring motor and is embedded inside the reaction chamber while being spaced from a wall of the reaction chamber; and a pH sensor for measuring pH inside the reaction chamber; (2) a gap adjustment step of adjusting a gap that is an interval between an outer surface of the stirring rod and an inner surface of the non-rotatable cylinder to be proportional to an average particle diameter of a positive electrode active material precursor to be obtained; and (3) a reaction step of supplying a metal solution and an alkaline solution for precipitation of the metal solution, to constitute the positive electrode active material precursor to be obtained, into the reaction chamber while rotating the stirring rod of the gap-adjusted continuous-type reactor, and allowing reaction for 30 minutes to 24 hours while maintaining pH inside the reaction chamber at 10.5 to 12.8.

A device for mixing at least two fluid to pasty substances has a housing (2) with at least two openings (5, 6) for feeding the substances and with a discharge opening (8), a mixing element (3) which can rotate in the housing (2), which mixing element (3) can be displaced in the direction (17) of its axis (7) in relation to the housing (2) in order to adjust the size of a gap (18) between a conically tapering part (14) of the mixing element (3) and a likewise tapering region (15) of the housing (2) in order to adjust the shear rate in the region of the gap (18). The mixing element (3) has a region (9) in which annular ribs (11) are provided which project from the mixing element (3) and which engage between adjacent annular ribs (12) which project from the inner surface (10) of the housing (2).

Apparatus for mixing a powdered material with a liquid that includes a housing, in which a working space having an inner wall is arranged and a rotatably-driven rotor being arranged in the working space. The rotatably-driven rotor includes a blade ring and bars, which are pointing toward the inner wall and are arranged at different positions in a circumferential direction of the rotor. The apparatus also includes a feed opening for the powdered material being arranged above the blade ring and an annular gap connectable to a liquid supply arrangement being arranged below the blade ring, in a direction parallel to an axial direction of the rotor, the bars one of connect to one another or overlap one another.

A kneading device includes: a preliminary kneading device that produces a preslurry by agitating a powder and a liquid introduced and transferring them while wetting the powder with the liquid; and a main kneading device that causes the powder to be uniformly dispersed in the preslurry supplied from the preliminary kneading device to produce a slurry. The main kneading device includes a gap defined by two conical surfaces that face each other with a predetermined distance therebetween and rotate relative to each other about their central axes. The slurry is produced by passing the preslurry through the gap. With the preliminary kneading device, the powder is dispersed in the liquid after conforming to the liquid, which suppress damage to the powder. The conditions of main kneading can be changed only by adjusting the gap, which facilitates the operation of changing the conditions of the main kneading.

A dynamic mixer comprising two mixing parts which are rotatable relative to each other about a predetermined axis of rotation, each of said mixing parts having a mixing face, between which is defined a flow path which extends between an inlet and an outlet, each of said mixing faces comprising a series of annular steps centered on the predetermined axis of rotation, having a plurality of offset and overlapping cavities formed therein, such that material moving between the mixing faces of the two mixing parts from the inlet to the outlet is transferable between overlapping cavities.