Rotating Screen Unit Agitator Ball Mill Clogging Prevention
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Solution Overview
Problem
In existing agitator ball mills, the grinding bodies tend to concentrate along the inner wall of the grinding container due to rotation, leading to clogging and increased wear at the screen unit, especially around the support plate of the classifier rotor, which affects the product discharge and increases maintenance needs.
Innovation Solution
A horizontal agitator ball mill design with a rotating screen unit integrated into a rotor cage, where the screen unit rotates with the classifier rotor to centrifuge grinding bodies radially, preventing compression and clogging, and a negative pressure system to manage the flow of grinding material and bodies within the grinding container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the screen unit is arranged in a stationary manner upstream of the grinding material outlet, then the grinding bodies can be separated from the ground material, but the grinding bodies concentrate along the inner wall and cause clogging and increased wear at the screen unit
Solution Approach 1:
The screen unit is made rotatable instead of stationary, allowing it to rotate together with the classifier rotor. This dynamic configuration prevents grinding bodies from concentrating and compressing against the screen unit, eliminating clogging and reducing wear while maintaining the separation function between ground material and grinding bodies.
Solution Approach 2:
The screen unit is integrated with the classifier rotor, combining the separation function with the classification function. Both the screen unit and classifier rotor rotate together, creating a unified rotating separation system that prevents harmful body concentration while achieving effective material-grinding body separation.
2Power
If the grinding bodies are pushed in the direction of the inner wall by rotation of the agitator shaft, then the grinding action is enhanced, but the grinding bodies concentrate axially along the inner wall leading to clogging
Solution Approach 1:
The screen unit rotates with the classifier rotor, creating a dynamic separation system that prevents grinding bodies from accumulating along the inner wall. This maintains the grinding action while preventing the axial concentration that leads to clogging and discharge problems.
Solution Approach 2:
The rotational motion of the screen unit changes the flow behavior of the product-fluid mixture in the area of the screen unit, preventing the harmful concentration of grinding bodies while maintaining effective grinding and separation.
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 solution enhances the discharge of ground material by preventing grinding body compression, reducing wear on the screen unit, and maintaining the efficiency of the grinding process by ensuring continuous flow and minimizing maintenance requirements.
Implementation Method 1
the screen unit rotates with the classifier rotor to centrifuge grinding bodies radially
Implementation Method 2
a negative pressure system to manage the flow of grinding material and bodies within the grinding container
Data Source
AI summary
An agitator ball mill including an in particular horizontal grinding container, which has a first end area having a grinding material inlet and a second end area having a grinding material outlet, and a method for operating an agitator ball mill. The agitator ball mill includes a shaft, which can be rotated in the grinding container or in the grinding chamber, respectively, by means of a drive unit and which is formed as agitator shaft at least in sections and which is equipped with agitator elements, as well as a separating device. The separating device includes a classifier rotor, which is arranged on the agitator shaft axially spaced apart from the grinding material outlet and has a rotatable rotor cage, as well as a screen unit, which is arranged within the rotor cage and which is fastened to the classifier rotor.