Ring Ball Mill Vitrification of Inorganic Powders Without Wall Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The mechanical milling method using a planetary ball mill for producing sulfide solid electrolyte materials results in the vitrified inorganic material sticking to the inner peripheral surfaces, necessitating frequent maintenance to scrape off the adhered material, which reduces production efficiency.
Innovation Solution
A method involving a ring ball mill mechanism that applies shearing stress and compressive stress to a mixed powder of inorganic compounds, followed by a dispersion step, repeated multiple times to produce a vitrified inorganic material powder, utilizing a ring ball mill apparatus with a gas feeding mechanism and control unit to manage the process efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a planetary ball mill is used for mechanical milling to produce sulfide solid electrolyte materials, then the vitrification process can be achieved, but the vitrified inorganic material sticks to the inner peripheral surface of the rotating cylinder, requiring frequent maintenance to scrape off the adhered material
Solution Approach 1:
The patent extracts the harmful function of material adhesion from the system by removing the rotating cylinder structure that causes sticking. Instead of using a planetary ball mill with a rotating cylinder, the invention employs a different milling mechanism where the grinding media moves in a way that prevents vitrified material from adhering to container walls, thereby eliminating the maintenance burden while preserving vitrification quality
Solution Approach 2:
The patent inverts the conventional approach by changing from a rotating cylinder mechanism to a system where the container remains stationary and the grinding media is agitated by balls dropped from above. This inversion of the motion mechanism prevents the vitrified material from sticking to surfaces while still achieving effective mechanical milling and vitrification
2Manufacturing precision
If a planetary ball mill is used for mechanical milling, then inorganic compound powders can be vitrified, but frequent maintenance is required to scrape off stuck material from the inner peripheral surface
Solution Approach 1:
The patent removes the rotating cylinder component that causes material adhesion, replacing it with a stationary container and a different ball mill mechanism. This extraction of the problematic rotating element eliminates the need for frequent scraping maintenance while preserving the vitrification capability
Solution Approach 2:
The milling mechanism is designed so that the grinding balls naturally prevent material adhesion through their motion pattern. The system is self-maintaining in the sense that the vitrified material does not stick to surfaces, eliminating the need for external maintenance interventions like scraping
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
This approach allows for the high-efficiency production of vitrified inorganic materials from mixed powders of various inorganic compounds, minimizing adherence to the mill components and eliminating the need for frequent maintenance, thereby enhancing production efficiency.
Implementation Method 1
a vitrification step of applying shearing stress and compressive stress to a mixed powder of a plurality of kinds of inorganic compound powders by using a ring ball mill mechanism to vitrify at least a part of the mixed powder
Implementation Method 2
a gas feeding mechanism that is attached to a lower side with respect to the ring ball mill mechanism in the container and feeds gas toward an upper part of the inside
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A method of producing an inorganic material (S10) according to the present invention includes a vitrification step (S12) of applying shearing stress and compressive stress to a mixed powder (MP) of a plurality of kinds of inorganic compound powders by using a ring ball mill mechanism (70) to vitrify at least a part of the mixed powder (MP) ; and a dispersion step (S13) of dispersing the vitrified mixed powder (MP) after the vitrification step (S12), where a combined step of the vitrification step (S12) and the dispersion step (S13) is performed a plurality of times to obtain a vitrified inorganic material powder from the mixed powder.