Fluidized Bed Separator for Density-Based Mineral Purification
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Solution Overview
Problem
Existing methods for separating particulate matter in grinding mills, such as vertical spindle and ball mills, are inefficient in removing mineral impurities based on density, leading to recirculation of unwanted high and low density materials, which affects the quality and efficiency of the milling process.
Innovation Solution
A separation apparatus and method that utilizes a housing with a size separation screen, fluid inlet to create a fluidized bed, and multiple outlets to segregate particulate matter by density, allowing high and low density materials to be separately ejected, with optional multi-stage processing to refine the separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional grinding mills are used without density-based separation, then the milling process can operate continuously, but mineral impurities and unwanted materials are not effectively removed, affecting product quality and requiring repeated grinding cycles
Solution Approach 1:
The system segments the particulate matter flow into different density-based streams using a fluidized bed separator. High density minerals are separated from low density materials through density differentiation in the fluidized bed, allowing simultaneous removal of impurities and maintenance of high throughput grinding operations
Solution Approach 2:
The density-based separation is performed preliminarily before materials are returned to the grinding mill. By removing unwanted low density materials and concentrating high density minerals in advance, the system prevents unnecessary re-grinding cycles and improves overall processing efficiency
2Manufacturing precision
If density-based separation is implemented using fluidized bed technology, then mineral matter can be effectively separated by density, but additional equipment and process steps are required
Solution Approach 1:
The system uses pneumatic fluidized bed technology to achieve density-based separation. Air or gas flow fluidizes the particulate matter, allowing high density and low density materials to separate naturally based on their density differences. This pneumatic approach provides effective separation while maintaining relatively simple equipment design compared to mechanical separation methods
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 approach effectively separates mineral matter by density, improving the concentration of desired minerals, reducing pollution, and enhancing milling efficiency by removing impurities, thereby reducing maintenance and increasing throughput.
Implementation Method 1
a fluid inlet, adapted to ingress a fluid into a lower portion of the housing so that the fluid and particulate matter together form a fluidised bed
Implementation Method 2
separating particulate matter based on density... a first outlet, adapted to egress particulate matter of a first predetermined density... and a second outlet, adapted to egress particulate matter of a second predetermined density
Data Source
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AI summary
A separation apparatus [2] for separating minerals or other particulate matter, including a housing [3], a particulate inlet [4], a fluid inlet [5] and an outlet [6]. The separation apparatus [2] separates the minerals or other particulate matter, based on density. This is achieved by ingressing a fluid into the fluid inlet [5] to create appropriate fluidization of the particulate matter within the housing [3]. Low density material may typically be extracted from an upper end of the housing [3], whilst higher density material may be typically extracted from a lower end of the housing [3]. The invention is particularly useful for separating minerals such as coal from impurities such as silica and pyrites.