Agitator Ball Mill Axial Recesses Grinding Body Distribution
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Solution Overview
Problem
Existing agitator ball mills experience reduced grinding efficiency due to uneven distribution of auxiliary grinding bodies, leading to increased concentration near the separating device, which limits the effectiveness of the grinding process.
Innovation Solution
The agitator shaft is modified with axial recesses that extend into the grinding chamber, coupling with the dynamic separating device to allow auxiliary grinding bodies to be conveyed back into the grinding chamber, thereby improving their distribution and reducing concentration near the separating device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dynamic separating device is used to separate auxiliary grinding bodies from the product flow, then the throughput is improved, but the auxiliary grinding bodies concentrate near the separating device, reducing grinding efficiency
Solution Approach 1:
The invention extracts the concentrated auxiliary grinding bodies from the problematic region near the separating device by providing recesses in the agitator shaft that extend into the grinding chamber. These recesses act as storage cavities that capture and hold the auxiliary grinding bodies, preventing their harmful concentration near the separating device while maintaining high throughput rates.
Solution Approach 2:
The recesses in the agitator shaft serve as an intermediary structure between the separating device and the grinding chamber. They mediate the movement of auxiliary grinding bodies by providing a temporary holding location, thereby preventing direct concentration near the separating device and improving overall grinding efficiency.
2Reliability
If the separating device holds back auxiliary grinding bodies, then they are retained in the grinding chamber, but blockages and compression occur at high throughput rates
Solution Approach 1:
The invention segments the grinding chamber space by introducing recesses in the agitator shaft. These recesses create additional zones within the grinding chamber that can accommodate auxiliary grinding bodies, effectively dividing the space to prevent blockages while maintaining reliable retention and high throughput rates.
3Measurement precision
If auxiliary grinding bodies are concentrated near the separating device, then separation is effective, but the distribution of grinding bodies becomes uneven, reducing grinding effectiveness
Solution Approach 1:
The invention extracts auxiliary grinding bodies from the concentrated region near the separating device and places them into recesses in the agitator shaft. This removes the harmful concentration effect while maintaining effective separation, thereby improving overall grinding effectiveness through more uniform distribution.
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 configuration enhances the uniform distribution of auxiliary grinding bodies throughout the grinding chamber, increasing the dwell time and effectiveness of the grinding process without requiring costly modifications to the grinding container.
Implementation Method 1
Centrifugal systems are also known from the prior art as dynamic separating devices, wherein the auxiliary grinding bodies are accelerated radially, as a result of which the latter are transported back into the grinding container on account of the acting centrifugal force.
Data Source
AI summary
A stirred ball mill including a grinding container, in which an agitator shaft having grinding elements is arranged, whereby a grinding chamber is formed between the grinding container and the agitator shaft, into which chamber the grinding elements extend and into which at least one inlet duct for grinding material opens and in which a dynamic separation device for grinding bodies is provided, the separation device having recesses for feeding back the grinding bodies, and in which the agitator shaft has at least one recess, which widens the separation device and extends in the axial direction into the grinding chamber for improved distribution of the grinding bodies in the grinding chamber.