Spiral Separator Splitter and Bypass for Slurry Slug Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Two-stage spiral separators face inefficiencies due to the formation of a dewatered central slug of material in the upstream trough part, which inhibits effective separation of desired minerals from gangue when fed to the downstream trough part, and existing solutions like repulpers or slurry preparation arrangements do not consistently provide optimal results across varying conditions.
Innovation Solution
A modular apparatus is introduced between the upstream and downstream spiral trough parts, featuring splitting arrangements to separate concentrate, semi-concentrate, and remainder parts, with a semi-concentrate bypass channel and mixing arrangement to enhance fluidity, ensuring the semi-concentrate is fed to the downstream part in a partially separated state, while maintaining separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the slurry flows through the upstream spiral trough part, then separation of minerals occurs, but a dewatered central slug of material forms which inhibits effective separation in the downstream trough part
Solution Approach 1:
The invention divides the slurry flow into three distinct segments using splitting arrangements: a concentrate part (radially inner), a semi-concentrate part (radially intermediate), and a remainder part (radially outer). This segmentation allows each portion to be treated differently - the semi-concentrate part is channeled separately to maintain its partially separated state while the remainder part undergoes thorough mixing, thereby preventing slug formation and maintaining separation effectiveness.
Solution Approach 2:
The invention extracts the semi-concentrate part from the main slurry flow and conveys it through a dedicated bypass channel directly to the downstream trough part. This extraction prevents the semi-concentrate material from mixing with the dewatered central slug, eliminating the harmful effect while preserving the beneficial concentrated mineral content.
2Ease of operation
If repulpers are used to deflect water into the central slug, then fluidity is improved, but separation effectiveness is reduced due to mixing
Solution Approach 1:
The invention segments the slurry flow to separate the semi-concentrate part from the remainder part, allowing the remainder part to be thoroughly mixed for fluidity without compromising the semi-concentrate part's separation. This segmentation enables independent treatment of each portion to optimize both fluidity and separation effectiveness simultaneously.
Solution Approach 2:
The invention applies different treatments to different parts of the slurry flow: the semi-concentrate part receives minimal disturbance to preserve its concentrated state, while the remainder part undergoes thorough mixing to improve fluidity. This local differentiation of treatment quality allows both objectives to be achieved without compromise.
3Ease of operation
If the semi-concentrate part is thoroughly mixed with the remainder part, then fluidity is improved, but the partially separated state is lost
Solution Approach 1:
The invention segments the slurry into distinct parts and provides separate flow paths: the semi-concentrate part flows through a bypass channel that avoids the mixing arrangement, while only the remainder part undergoes thorough mixing. This segmentation preserves the semi-concentrate's partially separated state while still improving overall fluidity through mixing of the remainder part.
Solution Approach 2:
The invention extracts the semi-concentrate part from the main flow and channels it separately, preventing it from being mixed with the remainder part. This extraction protects the valuable partially separated material from being diluted while allowing the remainder part to be mixed for improved fluidity.
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 improves mineral separation efficiency by ensuring the semi-concentrate part is fed to the downstream trough part in a partially separated state, enhancing the probability of higher concentrate mass and grades, and maintaining the benefits of thorough mixing and fluidization, thus overcoming limitations of previous methods.
Implementation Method 1
The particulates in the slurry are subject to a number of different forces, including gravitational force, drag forces due to contact with the spiral, and centrifugal force due to movement along a generally helical path. Broadly speaking, particles with higher specific gravity move toward the radially inner part of the spiral, and particles with lower specific gravity (lower density) move towards the outer parts of the spiral.
Implementation Method 2
a mixing arrangement for mixing a more fluid radially more outward part the remainder part with a less fluid radially more inward part of the remainder part
Data Source
AI summary
An apparatus for a spiral separator, for provision operatively intermediate upstream and downstream spiral trough parts of the spiral separator, including a slurry receiving region for receiving a mineral slurry flow from said upstream spiral trough part of the spiral separator; a splitter for splitting the mineral slurry flow into a concentrate part, a semi-concentrate part and a remainder part; a mixing region for mixing a more fluid radially more outward part of the remainder part with a less fluid radially more inward part of the remainder part, to provide a mixed remainder part for feeding onto the downstream spiral trough part; and a semi-concentrate bypass channel for conveying the semi-concentrate part towards the downstream spiral trough part, such that the semi-concentrate component bypasses and is segregated from the mixing region.