Gold recovery grass is a dedicated medium for placer gold recovery operations. It captures and retains gold particles within sluice concentration circuits and serves as a common consumable in placer gold mining systems. Also known within the industry as gold-catching grass or gold recovery blanket, it relies on a special grass-filament coil structure to separate heavy mineral particles from light silt and sand. In recent years, alongside the refinement of mineral processing technologies, continuous upgrades have been made to its material formulation, filament geometry and base fabric craftsmanship, adapting to pulp conditions with varying flow rates and particle sizes.
Gold recovery grass is compositely formed with polyethylene (PE) grass filaments bonded to a polymer base fabric. Grass height can be adjusted to suit project requirements, with mainstream specifications ranging from 18 mm to 26 mm. The grass filaments are manufactured via curl-winding forming technology to create a dense, interlaced network of cavities. When sand-ore mixed water flows over gold recovery grass laid inside the sluice, high-density gold grains settle under gravity and lodge within gaps formed by interwoven grass filaments. Low-density materials such as silt and crushed stone are continuously discharged with the water flow, enabling trapping and collection of heavy particles. Upon completion of the operation, the gold recovery grass can be rinsed to harvest gold grains.
In terms of material performance, PE delivers stable water resistance and acid-alkali corrosion resistance, resisting ageing and brittle cracking under prolonged immersion in pulp. The composite base fabric at the bottom enhances overall tensile strength and reduces tearing risks induced by installation and water scouring, making it suitable for continuous operation. Supplied in roll form, the mat can be cut on-site to fit sluice boxes, gold recovery beds and gold washing equipment of various dimensions. Standard roll dimensions are typically 1 m × 15 m; width and length can be modified according to project parameters.
For product selection, grass filament density and grass height are core parameters governing particle capture efficiency. Applications targeting fine placer gold recovery generally adopt low-height, high-density filament structures. For coarse-grained ore and high-flow pulp conditions, versions with thicker grass filaments and reinforced base fabric are selected to boost impact resistance. In practical service, gold recovery grass undergoes abrasion under continuous water scouring. Periodic inspection and replacement are required according to operational intensity to reduce material loss caused by filament damage.
Kaena Floor Mat & Carpet Factory integrates gold recovery grass into its roll mat product portfolio, alongside R&D and production of coil-structured materials. Leveraging roll mat production lines, the factory completes the full manufacturing workflow of gold recovery grass, including extrusion, winding, composite bonding and cutting. It supplies gold recovery grass rolls in various grass heights and densities, with custom cutting available to meet bulk procurement demands for small and medium-scale mineral processing sites.
The capture performance of gold recovery grass is strongly correlated with pulp flow velocity, mineral particle size and filament arrangement. No single product specification is universally applicable to all operating conditions. Prior to procurement, project operators shall select suitable models based on on-site sluice gradient, hydraulic parameters and placer gold particle distribution. Where necessary, small-scale sample tests are recommended to verify trapping performance and lower consumable investment and material losses.
Overall, gold recovery grass is a structural functional consumable whose performance relies on material stability and filament structural design. As mineral processing projects demand finer recovery efficiency, ongoing advances are being made in material formulation and structural optimization of gold recovery grass. Its product portfolio will continue to expand to cater to diverse mining scenarios.
