Monoroll Grinding Mill With Offset Hammer-Anvil Comminution
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Solution Overview
Problem
Existing grinding mills require significant power consumption and incur substantial maintenance and operational costs due to inefficiencies in comminution processes, particularly in reducing large rocks to smaller particle sizes.
Innovation Solution
A monoroll grinding mill (MRGM) with a single rolling hammer and anvil configuration, where the anvil and hammer have offset centers, applying compression and shear forces to comminute material efficiently, reducing the need for external pressure systems and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional grinding mills use large cylindrical grinding sections with multiple lifters and grinding media, then material comminution is achieved, but power consumption and operational costs increase significantly
Solution Approach 1:
The invention divides the traditional complex grinding system into a simplified configuration with a single rolling hammer and anvil, eliminating the need for multiple lifters, grinding media, and complex mechanical assemblies. This segmentation reduces energy losses and improves comminution effectiveness by focusing force application on a single optimized contact point.
Solution Approach 2:
The invention extracts and eliminates unnecessary components from traditional grinding mills, removing multiple lifters, excess grinding media, and complex drive mechanisms. By retaining only the essential hammer-anvil compression interface, the system achieves comparable or superior comminution with dramatically reduced power consumption.
2Productivity
If traditional mills use multiple lifting ribs and grinding media to comminute material, then particle size reduction is achieved, but maintenance and repair costs increase
Solution Approach 1:
The invention segments the grinding function into a single replaceable hammer component and a durable anvil, eliminating multiple lifting ribs and grinding media that require maintenance. This simplification reduces the number of wear-prone parts and facilitates easier repair by allowing straightforward hammer replacement without disassembling complex mechanisms.
Solution Approach 2:
The invention removes multiple maintenance-intensive components including lifting ribs, grinding media, and complex mechanical assemblies from traditional mills. By retaining only the essential hammer-anvil interface, the system achieves particle size reduction with minimal maintenance requirements and lower repair costs.
3Productivity
If traditional grinding mills use large cylindrical sections with multiple components, then material processing is achieved, but device complexity increases
Solution Approach 1:
The invention segments the complex cylindrical grinding chamber into a simplified housing containing only a single rolling hammer and anvil assembly. This segmentation eliminates multiple lifting ribs, grinding media chambers, and complex mechanical linkages while maintaining effective material comminution through the focused hammer-anvil compression interface.
Solution Approach 2:
The invention extracts and removes unnecessary structural elements from traditional large cylindrical grinding mills, including multiple lifting ribs, excess support structures, and complex drive mechanisms. By retaining only the essential hammer-anvil compression system, the invention achieves material comminution with significantly reduced device complexity.
4Productivity
If traditional mills operate continuously with multiple lifting ribs, then throughput is maintained, but energy efficiency decreases
Solution Approach 1:
The invention segments the continuous grinding process into discrete hammer rotation cycles that apply compression forces only when needed. The single rolling hammer rotates through the material bed, applying focused compression at the anvil contact point, eliminating energy-wasting continuous lifting and dropping actions of multiple ribs while maintaining throughput.
Solution Approach 2:
The invention removes the energy-inefficient continuous lifting mechanism of multiple ribs from traditional mills. By extracting this unnecessary component and replacing it with a single rotating hammer that applies compression forces only during contact with material, the system maintains throughput while dramatically improving energy efficiency.
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 MRGM achieves improved throughput, reduced capital and operating costs, enhanced efficiency, and increased particle size reduction capabilities compared to traditional mills, with potential energy savings and minimal wear on components.
Implementation Method 1
The gap between the anvil inner surface and the hammer outer surface create compression of the material therebetween during the concurrent rotating motion of the hammer and the anvil
Implementation Method 2
The hammer compresses and comminutes the material against the anvil, resulting in compression and shear fracture of the material therebetween
Implementation Method 3
Friction between the anvil and the hammer may be sufficient to rotate the hammer within the anvil as the anvil rotates
Data Source
AI summary
There is provided an apparatus and method for comminuting a material. The apparatus may comprise a chamber and an inner surface with a plurality of protrusions, and a hammer positioned within said chamber comprising an outer surface having a plurality of second protrusions configured to engage with the first protrusions. The outer and inner surfaces may be separated by a gap distance which defines a comminution zone. The anvil may be rotated to cause a material to be comminuted as the material passes through the comminution zone.