Slurry Conditioning Drum With Jet Circulation for Wide-Grade Flotation
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Solution Overview
Problem
Conventional slurry conditioning devices have weak mixing capability, leading to low collision and adhesion probabilities between fine particles and chemical molecules, poor adaptability to wide-particle-grade coal slime feed conditions, and increased mechanical mixing intensity, which affects flotation efficiency and separation range.
Innovation Solution
A pre-flotation slurry conditioning device with dual-channel jet circulation and counter-flow mechanical mixing, utilizing mixing impellers and annular cutting isolation plates to form a forced turbulent mixing area, enhancing collision and contact between particles and chemicals through shear jetting and emulsified chemical feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional slurry conditioning devices are used, then the structure is simple, but the mixing capability is weak resulting in low collision probability between fine particles and chemical molecules
Solution Approach 1:
The mixing system is segmented into multiple functional components: dual-channel jet circulation system, emulsified chemical feeding system, and counter-flow mechanical mixing system with multiple impellers. This segmentation allows each component to perform its specific function efficiently while maintaining overall structural simplicity
Solution Approach 2:
The patent employs hydraulic principles through the dual-channel jet circulation system that uses water flow to create circulation and mixing. The jet openings and water channels utilize fluid dynamics to achieve slurry circulation and chemical distribution without complex mechanical mechanisms
2Device complexity
If conventional slurry conditioning devices are used, then the device complexity is low, but the adaptability to wide-particle-grade coal slime feed conditions is poor
Solution Approach 1:
The slurry conditioning device is designed with multi-functionality to handle wide-particle-grade coal slime feed. The combination of jet circulation, emulsified chemical feeding, and mechanical mixing creates a universal system that can effectively condition slurry across different particle size distributions and feed conditions
Solution Approach 2:
The device performs preliminary slurry conditioning through jet circulation and chemical emulsification before the main flotation process. This preliminary action prepares the slurry by dispersing particles and distributing chemicals uniformly, making the system adaptable to various feed conditions including wide-particle-grade material
3Productivity
If mechanical mixing intensity is increased to compensate for poor slurry conditioning, then the mixing effect improves, but the flow field environment deteriorates and desorption probability increases
Solution Approach 1:
The patent introduces water as an intermediary medium through the dual-channel jet circulation system. This water medium facilitates slurry circulation and chemical distribution without requiring excessive mechanical mixing intensity, thereby maintaining better flow field environment and reducing particle-bubble desorption
Solution Approach 2:
The patent partially replaces intensive mechanical mixing with hydraulic circulation and emulsified chemical feeding mechanisms. The jet circulation system and emulsified chemical delivery reduce reliance on high-intensity mechanical mixing, thereby improving flow field environment while maintaining effective slurry conditioning
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
Enhances the probability of collision and contact between ore slurry and chemical molecules, improves hydrophobic flocculation, and reduces fine slime entrainment, thereby improving flotation efficiency and concentrate quality.
Implementation Method 1
a chemical feed pipe, which is a Venturi pipe for realizing shear jetting of the ore slurry
Implementation Method 2
realizing shear jetting of the ore slurry, the molecules of the collecting agent and the frothing agent are sucked into the chemical feed pipes automatically under pressure, and are emulsified and dispersed in a high-shear ore slurry flow field
Implementation Method 3
forming a forced mixing area by means of a positional and structural design of the mixing impellers and the annular cutting isolation plates... realized reversed forced turbulent mixing with strong swirling fluid moving upward
Implementation Method 4
counter-flow mechanical mixing for forced coupled slurry conditioning... counter-flow forced turbulent mixing with strong swirling fluid moving upward from the bottom of a slurry conditioning drum
Implementation Method 5
enhance the selective collision and adsorption between the oil droplets of the collecting agents and the coal slime particles... improve the hydrophobicity difference between cleaned coal particles and gangue minerals
Data Source
AI summary
A pre-flotation high efficiency slurry conditioning device for wide-particle-grade flotation, suitable for coal slime flotation. Said device comprises a slurry conditioning drum (15) having a columnar structure on top and an inverted frustrum structure below, an ore slurry outlet (4) is provided at an upper part of a side wall, ore slurry pump separation openings (5) are provided at two sides below the ore slurry outlet (4), ore slurry jet openings (17) are respectively provided at two sides of the columnar structure, and circular cutting isolation plates (11) and flow guide plates (10) are provided in alternation at inner sides of the upper half of the slurry conditioning drum (15); a dual channel jet circulation chemical feed system comprises chemical feed pipes (13), each chemical feed pipe (13) comprises an inlet end, a diffusion end, and a chemical feed pipe opening arranged at a throat area of said pipe, the inlet end is connected to a three-way pipe by means of a centrifugal pump (8), which is connected to an ore slurry inlet (6) and an ore slurry pump separation opening (5), a mixing shaft (7) is provided in the axial direction within the slurry conditioning drum (15), a plurality of mixing impellers (14) are arranged on the mixing shaft (7), and the bottom-most two mixing impellers (14) and the lowest two circular cutting isolation plates (11) are arranged at a same horizontal height. The present apparatus can effectively improve coal slime hydrophobic flocculation and fine slime separation, improve an ore slurry preprocessing effect, and effectively alleviate internal flow field pressure within a flotation device.