Rotary Mill Impact Rotor Shatter Bars Glass Grinding
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Solution Overview
Problem
Conventional grinding systems produce particles that are not fine enough to enhance reflectivity, and existing rotary mills for recycling glass do not efficiently separate particles by size for further processing.
Innovation Solution
A rotary mill design with an impact rotor, shatter bars, and an exhaust fan that fragments solid materials into finer and coarser particles, using inclined guide walls and leading blade elements made of hardened steel, and a secondary reduction chamber with airflow to separate particles by size, allowing only finer particles to exit through a finer particle outlet duct.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional grinding systems are used, then the grinding process is simple, but the particle fineness is insufficient to enhance reflectivity
Solution Approach 1:
The grinding system is segmented into multiple independent components: impact hammers for initial fragmentation, shatter bars for secondary reduction, and classification mechanisms. This segmentation allows each component to specialize in specific size reduction tasks, achieving finer particles while maintaining manageable system complexity through modular design
Solution Approach 2:
The invention transitions from conventional single-stage grinding to a multi-dimensional size reduction approach: first dimension through impact hammers, second dimension through shatter bars, and third dimension through classification and recirculation. This dimensional progression enables achieving fine particle size that would be impossible with single-stage systems
2Illumination intensity
If all particles are ground to fine size, then reflectivity is improved, but energy consumption and processing time increase
Solution Approach 1:
Instead of uniformly grinding all particles to fine size, the system applies different treatment levels to different particle populations: fine particles are produced for reflectivity enhancement, while coarser particles are separated and can be used for other purposes or reprocessed. This local quality approach optimizes energy usage by not over-grinding particles that don't require fine size
Solution Approach 2:
The system performs partial grinding action on the particle population, producing enough fine particles to achieve the required reflectivity threshold without excessively grinding all particles to the finest possible size. The classification mechanism enables this partial action by separating particles that have achieved sufficient fineness from those requiring further processing
3Productivity
If coarser particles are not separated, then all material is processed uniformly, but material utilization efficiency decreases
Solution Approach 1:
The classification mechanism separates coarser particles from fine particles, allowing the fine particles to be used for reflectivity enhancement while coarser particles are recovered for further processing or alternative uses. This discarding and recovering approach improves material utilization efficiency by preventing waste of coarser material that may have other valuable applications
Solution Approach 2:
The separation system enables multi-functionality of the grinding mill: it can produce fine particles for reflectivity enhancement, recover coarser particles for other uses, and potentially adjust operation to prioritize different particle sizes based on demand. This universality improves material utilization efficiency by making the system adaptable to different product requirements
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
The rotary mill effectively produces finer particles that improve reflectivity and efficiently separates particles by size, allowing for the collection of coarser particles for further processing, enhancing material utilization and reducing wear on the mill.
Implementation Method 1
rotation of the rotor acts to throw the solid materials against the peripheral wall
Implementation Method 2
an exhaust fan arranged to generate an airflow from the primary reduction chamber, through the secondary reduction chamber and into the outlet chamber. This airflow carries the reduced particles
Implementation Method 3
an inclined guide wall at the feed opening in the peripheral wall of the impact chamber which is directed from the opening toward the rotor; the guide wall being inclined downwardly into the impact chamber so that the solid material slides along the guide wall into the chamber to the rotor
Data Source
AI summary
A rotary mill for grinding recycled glass materials into particles has a housing defining an impact chamber with a rotor in the chamber at the bottom of an inclined guide wall underneath the feed opening. The rotor has a plurality of axially extending, angularly spaced massive impact hammers so that the impact hammers impact and deflect the solid materials onto a plurality of shatter bars located at the peripheral wall. Each of the impact hammers has a leading blade element of a hardened steel which has a front face inclined relative to a bottom portion of the guide surface so that an outer edge of the front face is angularly advanced relative to an inner edge thereof.