Uranium Beneficiation via Hydrocyclone Segmentation
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Solution Overview
Problem
Current uranium ore beneficiation processes are inefficient due to the presence of fine clay and carbonate minerals, which hinder uranium recovery and increase processing costs, especially in low-grade ores containing these minerals.
Innovation Solution
A uranium beneficiation process involving a hydrocyclone step to separate fine gangue material, followed by flotation to separate carbonate minerals from uranium minerals, thereby producing a higher-grade uranium concentrate for downstream leaching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional beneficiation processes are used on low-grade uranium ores containing fine clay and carbonate minerals, then processing can proceed with standard methods, but uranium recovery is hindered and processing costs increase
Solution Approach 1:
The process segments the ore processing into distinct stages: hydrocyclone classification to separate fine gangue from coarser uranium-bearing material, followed by flotation separation. This segmentation allows each stage to address specific mineralogical challenges, improving overall uranium recovery while managing the interference from fine clay and carbonate minerals
Solution Approach 2:
The hydrocyclone step performs preliminary separation by rejecting fine gangue material before the main flotation process. This preliminary action removes problematic fine clay particles that would otherwise interfere with subsequent uranium mineral separation and increase reagent consumption
2Ease of manufacture
If fine gangue material is not rejected, then the processing flow can remain simple, but carbonate mineral separation from uranium minerals becomes less effective
Solution Approach 1:
The hydrocyclone performs a preliminary classification action that removes fine gangue material before flotation. This preliminary step simplifies the overall process by pre-concentrating the uranium-bearing material and removing interfering fines, thereby improving subsequent carbonate mineral separation efficiency without adding excessive complexity
Solution Approach 2:
The process extracts and removes fine gangue material through the hydrocyclone step, separating it from the uranium-bearing concentrate. This extraction of harmful fine particles improves the effectiveness of subsequent flotation operations for separating carbonate minerals from uranium minerals
3Productivity
If fine gangue material is rejected through hydrocyclone, then uranium recovery improves and reagent consumption reduces, but an additional processing step is required
Solution Approach 1:
The process divides uranium ore treatment into segmented stages: hydrocyclone classification followed by flotation. This segmentation improves uranium recovery and reduces reagent consumption by removing fine gangue before flotation, while keeping each individual step relatively simple and well-established
Solution Approach 2:
The hydrocyclone step changes the particle size distribution parameter of the feed material to flotation by rejecting fine gangue. This parameter change improves flotation efficiency and uranium recovery, and the hydrocyclone technology itself is well-established, limiting the increase in overall 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
This process effectively rejects fine particulate waste, improving uranium recovery and reducing reagent consumption, allowing for the use of an acid leach circuit instead of a more complex alkali leach, thereby lowering costs and enhancing processing efficiency.
Implementation Method 1
performing a hydrocyclone step to produce an underflow fraction and an overflow fraction according to a size separation parameter
Implementation Method 2
performing a hydrocyclone step to produce an underflow fraction and an overflow fraction according to a size separation parameter
Implementation Method 3
treating the underflow fraction in a separation step to separate carbonate minerals from the uranium minerals
Data Source
AI summary
The invention relates to a beneficiation process for uranium ores comprising clay and carbonate minerals, the process comprising: performing a hydrocyclone step to obtain a hydrocyclone underflow fraction substantially comprising the uranium component; treating the hydrocyclone underflow fraction to effect a separation of carbonate and uranium minerals; and recovering the uranium-bearing minerals to produce a uranium concentrate.