Shaking Table Riffle Segmentation for Gold Recovery
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Solution Overview
Problem
Current gold concentrate recovery methods, such as the cyanide process and table gravity concentration, face inefficiencies in recovering gold from ores with varying particle sizes and specific gravities, leading to incomplete separation and instability in operation, particularly when coarse gold ore particles are not fully dissolved and large particle diameter gold ore particles are recovered as tailings.
Innovation Solution
A gold concentrate recovery system with a shaking table equipped with multiple riffles, including second riffles on the flat area downstream of the gold line, which redirects high specific gravity and large particle diameter gold ore particles back into the gold line, enhancing separation efficiency and stability by reducing deviation and winding of the gold line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If table gravity concentration is used to recover high-grade gold concentrates, then gold recovery efficiency is improved, but large particle diameter gold ore particles are incorrectly recovered as tailings
Solution Approach 1:
The patent segments the riffles into two distinct types: first riffles for concentrating ore particles and generating the gold line, and second riffles for returning large particle diameter gold ore particles to the gold line. This segmentation allows each riffle type to perform its specific function optimally, resolving the contradiction between recovery efficiency and separation accuracy.
Solution Approach 2:
The patent applies local quality by positioning second riffles specifically in the flat area where large particle diameter gold ore particles deviate from the gold line. This localized intervention ensures that only the problematic large particles are redirected, while the separation of other particles remains unaffected, thereby improving separation accuracy without compromising overall recovery efficiency.
2Speed
If the shaking table oscillates to separate ore particles, then separation speed is improved, but the gold line deviates and winds requiring frequent partition plate adjustments
Solution Approach 1:
The second riffles act as intermediary structures that mediate between the oscillation movement and the gold line stability. They provide a mechanical intervention point that redirects large particles back to the gold line, stabilizing the gold line trajectory without reducing the oscillation speed necessary for efficient separation.
3Measurement precision
If partition plate is used to separate gold line from tailings, then separation precision is improved, but operational complexity increases due to frequent adjustments
Solution Approach 1:
The second riffles perform a preliminary action by redirecting large particle diameter gold ore particles to the gold line before the partition plate separation occurs. This pre-separation reduces the burden on the partition plate, minimizing the need for frequent adjustments and simplifying operation while maintaining high separation precision.
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 allows for the efficient recovery of both high specific gravity and small particle diameter gold ore particles as concentrates, reducing errors in separation and eliminating the need for frequent partition plate adjustments, thereby achieving stable and high-yield gold concentrate recovery.
Implementation Method 1
a technology of table gravity concentration (also called flowing film concentration) is proposed as a method for recovering high-grade gold concentrates. This method achieves direct refinement only by performing gravity concentration
Implementation Method 2
low specific gravity ore particles having low specific gravity such as gangue minerals and sulfide minerals contained in the ore slurry supplied to the shaking table 102 go over the riffles 103 by the flow of the additive water supplied from the water supply launder 105
Data Source
AI summary
The gold concentrate recovery system and a gold concentrate recovery method capable of recovering gold concentrates from gold ores with high efficiency and stability. The system and method include a shaking table 2 including a plurality of riffles 3 provided on an upper surface 2a. The riffles 3 include a plurality of first riffles 3a provided on the upper surface 2a of the shaking table 2, and at least a second riffle 3b disposed in a flat area 12 where the first riffles 3a are not provided.