Multi-Chamber Silo Mixer for Anode Cover Material Homogenization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for mixing crushed bath and alumina to produce anode covering material (ACM) in the aluminum industry face challenges due to the easy segregation of materials with broad particle size distribution, leading to inconsistent heat balance and material properties.
Innovation Solution
A multi-chamber silo mixer is designed to homogenize the crushed bath material using the mass-flow principle, where materials are distributed into multiple chambers during filling and emptied simultaneously during discharge, reducing segregation and improving particle size distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ordinary mechanical mixers or metering screw conveyors are used to mix crushed bath and alumina, then the mixing process is simple and fast, but the material segregates easily due to broad particle size distribution, leading to poor homogeneity
Solution Approach 1:
The silo is divided into multiple chambers (first chamber for receiving crushed bath, second chamber for receiving alumina, and optionally a third chamber for mixing) to enable separate material handling and controlled mixing, thereby achieving homogeneous particle size distribution without complex mechanical mixing equipment
2Productivity
If a silo is used to mix large quantities of material, then the mixing capacity increases and homogeneity improves, but the device complexity and space requirements increase
Solution Approach 1:
The silo is segmented into multiple chambers that can be filled and emptied in a coordinated sequence, enabling large-scale mixing capacity while maintaining relatively simple device structure by utilizing gravity flow and controlled discharge mechanisms rather than complex mechanical mixers
Solution Approach 2:
The multi-chamber silo operates by periodically filling and emptying chambers in a controlled sequence, allowing continuous mixing operation with large capacity while maintaining simple device structure through rhythmic material flow cycles
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 multi-chamber silo mixer effectively reduces the standard deviation of material samples by 68%, achieving a more consistent and homogenous ACM with improved material properties, capable of handling larger quantities efficiently and with minimal energy consumption.
Implementation Method 1
The material (A) is homogenized in a first mixer (5a, 5b) before being mixed together with material (B) in a second mixer (7). The material (A) is homogenized in a gravimetric mixer (5a, 5b) with plural chambers and which is discharged in accordance to the mass flow principle.
Implementation Method 2
a silo can mix or homogenize a lot larger quantities than what is possible with an ordinary mixer per unit time. The reason for this is that a silo can mix or homogenize a lot larger quantities than what is possible with an ordinary mixer per unit time.
Data Source
Figure 1~2
Figure 3a~3b
Figure 4
AI summary
A method and a station for mixing bulk solid material, in particular for mixing at least two materials (A, B) where at least one of these materials (A) has a broad particle size distribution. The material (A) is homogenized in a first mixer (5a, 5b) before being mixed together with material (B) in a second mixer (7). The material (A) is homogenized in a gravimetric mixer (5a, 5b) with plural chambers and which is discharged in accordance to the mass flow principle. The materials (A) and (B) are preferably mixed in a gravimetric mixer (7) with plural chambers and is further discharged in accordance to the mass flow principle. The material (A) is substantially crushed bath material. The material (B) is primary and/or secondary alumina that mixed with (A) will be used as recycled anode cover material (ACM).