Horizontal Agitator Bead Mill Layout for Low-Energy Dry Grinding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing grinding processes for producing water vapor-permeable films require significant time, resources, and energy, particularly in the production of calcium carbonate fillers, which are complex and energy-intensive, involving multiple steps like dewatering, drying, and screening, with energy consumption ranging up to 1,000 kWh/t.
Innovation Solution
A system arrangement comprising an agitator bead mill with a horizontally aligned filling system and classifier wheel, operating in a dry state, forms a closed grinding and classifying circulation system to achieve efficient grinding with minimal energy input, eliminating the need for pre-grinding and subsequent drying, and producing a finely ground product suitable for breathable plastic films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional multi-step grinding processes (vertical roller mills, pendular roller mills, impact mills) are used to produce calcium carbonate fillers, then the filler can be produced with required particle size distribution, but the energy consumption increases significantly to up to 1,000 kWh/t
Solution Approach 1:
The patent combines pre-grinding and fine-grinding operations into a single agitator bead mill unit, eliminating the need for separate grinding stages. The mill processes material continuously through a closed circulation system, integrating classification and grinding functions in one device, thereby reducing total energy consumption while maintaining required particle size distribution.
Solution Approach 2:
The patent implements a continuous closed circulation system where ground material is continuously classified and returned to the mill for further grinding if necessary. This continuous operation eliminates idle time and intermediate handling, maintaining productive action throughout the process and reducing overall energy consumption compared to batch processing.
2Productivity
If traditional grinding processes are used, then filler production is achieved, but multiple additional steps (dewatering, drying, screening, coating) are required, increasing process complexity and energy consumption
Solution Approach 1:
The patent extracts and eliminates unnecessary intermediate steps (dewatering, drying, screening) by implementing a dry grinding process that produces the final product directly. The closed circulation system with classification wheel separates and returns material continuously, eliminating the need for separate dewatering and drying operations while maintaining productivity.
Solution Approach 2:
The agitator bead mill is designed to perform multiple functions: grinding, classifying, and producing the final dry filler product in a single unit. The classification wheel integrated into the system performs both separation and size control functions, reducing the need for separate specialized equipment for each function.
3Ease of manufacture
If vertically aligned filling systems and classifier wheels are used, then the grinding process can be implemented, but the system lacks flexibility and is difficult to maintain
Solution Approach 1:
The patent employs a horizontally aligned filling system and classifier wheel arrangement that allows for dynamic adjustment and flexible maintenance. The horizontal configuration enables easier access to components for maintenance purposes while maintaining the functional integrity of the grinding and classification process, improving both ease of manufacture and maintenance flexibility.
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 system achieves an energy-efficient grinding process with specific energy consumption below 200 kWh/t, producing a finely ground calcium carbonate filler with a steep particle size distribution, reducing energy consumption and simplifying the production process.
Implementation Method 1
an agitator bead mill with filling system for starting materials to be ground
Implementation Method 2
a classifier wheel, which is coupled to the agitator bead mill
Data Source
AI summary
A system arrangement for grinding starting materials. Such a system arrangement thereby includes an agitator bead mill with filling system for starting materials to be ground and a classifier wheel, which is coupled to the agitator bead mill. The filling system as well as the classifier wheel are thereby arranged essentially horizontally with respect to a longitudinal extension of the agitator bead mill. In addition, a method for grinding starting materials is shown.