Gemini shaking table

The Gemini shaking table is made of fibreglass that is supported by steel frame. It has an adjustable tilt and one direction shaking movement with variable speed. The table has recessed grooves that collect gold. The material is fed onto the table through the hopper. Physical separation is achieved by shaking movements and continuous supply of water at constant pressure to the main manifold in the centre. Shaking moves the material forward, water washes the light material outwards and dense material remains. Three products are produced, concentrates, middling and tailings. The middling fractions may be re-processed to upgrade into concentrate .

Gemini shaking table - Technology Assessment

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Categories Sub-categories Assessment questions Assessment
Properties of the ore Type of deposits Is the technology suitable for hard rock deposits? Yes
Is the technology suitable for alluvial gold deposits? Yes
Is the technology suitable for eluvial gold deposits? None
Type of ore Is the technology suitable for free milling ores? Yes
Is the technology suitable for oxide ores? None
Is the technology suitable for sulphide ores? None
Is the technology suitable for carbonaceous ores? None
Is the technology suitable for refractory ores? None
Is the technology suitable for sand rock bearing ore? None
Is the technology suitable for ore with clay material? None
Is the technology suitable for ore bearing nuggets? None
Is the technology suitable for ore in desert areas? None
Is the technology suitable for ore in wet conditions? None
Is the technology suitable for ore in coarse gravels? None
Is the technology suitable for ore in fine gravels? None
Grade/gold content Is the technology suitable for high grade ores? None
Is the technology suitable for low grade ores? Yes
Grain size of the gold) Is the technology suitable for fine grained gold? Yes
Is the technology suitable for course grained gold? None
Is the technology suitable for mixed fine and course material? None
Is the technology suitable for very/ultra fine grained gold? None
Feed volume (batch volume) Is the technology suitable for large quantity of feed material? No
Is the technology suitable for small quantity of feed material? Yes
Operationals requirements Cost of equipment Are the costs of procuring the technology affordable to artisanal miners? No
Are the costs of procuring the technology affordable to small-scale miners? Yes
Are the costs of operating the technology affordable to artisanal miners? None
Are the costs of operating the technology affordable to small-scale miners? None
Are the costs of maintanance and replacement affordable to small-scale miners? None
Are the costs of maintanance and replacement affordable to artisanal miners? No
Utilities and inputs required Does the technology require water? Yes
Is the amount of water required suitable to processing by individual miners? None
Does the technology require electricity or power source? Yes
Is the amount of electricity required suitable to processing by individual miners? None
Does the technology requre diesel? No
Is the amount of diesel required suitable to processing by individual miners? No
Does the technology require reagents during processing? None
Is the amount of reagents suitable for processing by individual miners? None
Does the technology require any other infrastructure? Yes
Type of organisation Does the technology allow operation by individual miners? Yes
Does the technology allow operation by group of miners? Yes
Does the technology allow operation by organisations? No
Does the technology allow operation by processing plants? No
Does the technology work only with a continous system? No
Does the technology work with batch and continous systems? Yes
Does the technology work only with a batch system? No
Processing flowsheet and performance of the techology Processing flow Does the technology work as a standalone? Yes
Does the technology work as part of a process system? Yes
Gold recovery Does the technology offer high recovery rates compared to the amalgamation process? Yes
What are the typical gold recoveries for this technology? 99%
Does the technology produce gold directly? Yes
Does the technology produce gold directly but in a different form to be converted to gold? No
Does the technology require other processes to recover the gold? No
Are there potential gold losses during processing with this technology? Yes
Processing time Does the technology offer less processing time compared to the amalgation process? None
Tailings Can the technology re-process tailings? Yes
Recovery of other minerals Can the technology recover other minerals in addition to gold? Yes
Visual tracking and monitoring Does the technology allow visual tracking and/or monitoring? Yes
Local considerations Availability of the equipment Does the technology make use of equipment that is locally available? No
Availability of the inputs Does the technology require inputs that can be locally sourced? None
Scalability of the technology Can the technology be scaled up or down to suit the spectrum of ASGM activities? Yes
Adaptability of the technology Can the technology be used in remote areas? No
Ease of use/learning (skills requirement) Is the technology easy to use or learn? No
Does the technology require knowledge /skills on metallurgy to use? No
Capacity to maintain Is the technology easy to maintain? No
Health, safety and environment Risks Health and safety hazards Does the recovery of gold using this technology pose any health and safety hazards? No
Environmental risks Does the recovery of gold using this technology pose any environmental risks? No

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4 comments have been posted about this technology

    James Lyons - Oct. 17, 2023, 10:59 a.m.
    the table doesnt fast enough

    Reply
    ItaiM - Oct. 19, 2023, 9:22 a.m. moderator
    Hi James, thank you for adding this information! Where are you located and where did you use the gemini table?

    Domenick Brentham - Dec. 19, 2023, 11:47 a.m.
    shalom, i had a similar problem


    Albertoe Lorriento - Feb. 20, 2024, 11:46 a.m.
    Hello, i recently acquired posesipn of one of these pristiene gemini shaking tables however when i went to operate the table i found that it didnt quiet shake fast enough please could you resolve this issue or issue me a refind, kind regards.

    Reply