Horizontal Bead Mill With Inclined Vessel Wall to Prevent Bead Buildup
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Solution Overview
Problem
Existing horizontal bead mills face efficiency issues due to increased bead density at the outlet side during material dispersion, which affects productivity and dispersion quality.
Innovation Solution
A horizontal bead mill design with an inclined inner surface on the vessel sidewall, angled at 1 to 3 degrees relative to the rotor axis, and a slit or mesh screen at the outlet to prevent bead accumulation by applying force opposite to the material flow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the moving speed of materials is increased to enhance productivity, then productivity is improved, but bead density increases in the outlet area, decreasing dispersion efficiency
Solution Approach 1:
The vessel is designed with an asymmetric structure where one sidewall is inclined at an angle of 10 to 45 degrees relative to the rotor rotation axis, creating an asymmetric geometry that prevents bead accumulation in the outlet area while maintaining high material flow speeds for productivity
Solution Approach 2:
Instead of allowing beads to move naturally with the material flow toward the outlet, the inclined sidewall applies force in the opposite direction to push beads back toward the rotor, inverting the natural bead movement pattern to prevent density buildup and maintain dispersion efficiency at high productivity speeds
2Productivity
If the moving speed of materials is increased, then productivity is improved, but bead density increases causing beads to pile up around the outlet
Solution Approach 1:
The asymmetric vessel design with the inclined sidewall creates non-uniform bead distribution that prevents localized density buildup, allowing high material flow rates without the bead accumulation that would otherwise occur in the outlet region
Solution Approach 2:
The inclined sidewall reverses the natural tendency of beads to accumulate at the outlet by applying counter-directional force, effectively managing bead quantity distribution to maintain low density in the outlet area even at high productivity operating conditions
3Productivity
If force is applied to beads in the direction of material flow, then productivity is improved, but dispersion efficiency decreases due to bead pile-up
Solution Approach 1:
The inclined sidewall applies force to beads in the direction opposite to material flow, counteracting the natural flow-driven bead movement and preventing the formation of bead piles that would reduce dispersion efficiency while allowing high productivity operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances dispersion efficiency and maintains productivity by preventing bead density increases, improving the dispersibility of conductive materials and binders in secondary battery electrode slurries.
Implementation Method 1
a rotor (200) which is rotated in the vessel (100) to rotate the beads (B) to thereby disperse the disperse media (S)
Implementation Method 2
an inner surface of a sidewall of the vessel is inclined at a predetermined angle with respect to an axis of the rotor and is formed as an inclined portion whose inner diameter gradually decreases from an inlet side toward an outlet side
Data Source
AI summary
A horizontal bead mill for dispersing secondary battery materials and a method for dispersing conductive materials using the horizontal bead mill for dispersing the secondary battery materials are provided. The horizontal bead mill includes a vessel including an inlet and an outlet configured to receive disperse media. The vessel is filled with beads. A rotor is rotated in the vessel to rotate the beads to disperse the disperse media. A driving unit rotates the rotor. An inner surface of a sidewall of the vessel is inclined at a predetermined angle for an axis of the rotor in a manner that an inner diameter of the vessel gradually decreases from an inlet side to an outlet side.