Milling Device Pneumatic Separation High Silicon Materials
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Solution Overview
Problem
Existing centrifugal percussive mills in metallurgy and other industries face issues of low reliability, low productivity, and inability to separate materials effectively due to self-sealing and imbalance caused by high moisture content, leading to clinches and breakdowns, and fail to separate materials into fractions.
Innovation Solution
A milling device with a vertical cylindrical body and rotating disc equipped with removable hammers and a conical divider, utilizing controlled airflow and enlarged blades to prevent self-sealing, enhance separation, and increase air pressure, allowing for efficient separation of materials into light, medium, and coarse fractions, and featuring a system of pneumatic separation with an air slugcatcher and anti-abrasive pads for improved durability and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotating disc with hammers is used for milling, then the material can be processed, but self-sealing occurs when moisture exceeds 5% causing imbalance and breakdowns
Solution Approach 1:
The harmful effect of self-sealing material is extracted and removed from the milling chamber through specially designed air outlets and pneumatic channels that actively evacuate moist material before it can cause imbalance and breakdowns
Solution Approach 2:
A pneumatic system is introduced to control the removal of milled material from the chamber. Air outlets and pneumatic channels create controlled airflow that prevents material accumulation and self-sealing on the rotating disc, eliminating the harmful effect while maintaining milling effectiveness
2Manufacturing precision
If the gap between the rotating disc and chamber wall is reduced for finer milling, then product quality improves, but the risk of material pieces causing clinches increases
Solution Approach 1:
Air outlets are positioned to create preliminary airflow that removes material pieces from the gap area before they can cause clinches, allowing the gap to be reduced for finer milling while maintaining reliability
Solution Approach 2:
Controlled airflow acts as an intermediary between the rotating disc and chamber wall, preventing material pieces from causing clinches in the reduced gap while enabling finer milling precision
3Manufacturing precision
If separation into fractions is implemented, then product quality improves, but device complexity increases
Solution Approach 1:
The separation function is merged with the existing milling chamber structure. Air outlets and pneumatic channels are integrated into the chamber design, allowing fraction separation without adding complex external separation equipment
Solution Approach 2:
The pneumatic system serves multiple functions: it removes material from the chamber, prevents self-sealing, and separates material into fractions. This multi-functionality achieves high separation quality without proportionally increasing device complexity
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 significantly improves the reliability and durability of the milling process, prevents self-sealing, enhances the quality of separation, and extends the service life of anti-abrasive pads, reducing manufacturing costs and maintenance time while achieving efficient separation of metal and phytogenic materials with high silicon content.
Implementation Method 1
A rotating disc is installed on a bearing unit inside the said vertical cylindrical body, with removable hammers radially installed on an upper surface of the rotating disc
Implementation Method 2
Removable blades located in the lower part of the rotating disc are enlarged to create more air pressure between anti-abrasive pads located on the edge of the rotating disc and on the peripheral part of the chamber of higher pressure
Implementation Method 3
in a controlled airflow
Implementation Method 4
The system of pneumatic separation comprises a milling chamber coupled with an air slugcatcher, an upper and a lower channels for a milled material of light fraction
Data Source
AI summary
The invention relates to the method and device for milling and separation into fractions of solids and granular materials in a controlled airflow. The device for milling and separation of solids and granular materials consists of a round milling chamber with a system of pneumatic separation comprising of a vertical cylindrical body that has an uploading slot for solids and granular materials and unloading channels for the milled products of light, medium and coarse fractions. A rotating disc and a conical divider are located inside the vertical cylindrical body. The rotating disc has removable hammers and removable blades of different sizes and configurations. The system of pneumatic separation consists of a milling chamber, an air slugcatcher, channels for the milled material, and a chamber of higher pressure. Such a construction of the device allows to obtain products of the highest quality, and to improve the separation by dividing the material into three fractions: light, medium and coarse.