What mesh size is required for gold ore after crushing

Gold ore crushing does not have a one-size-fits-all answer; the required product size depends on the liberation size of gold particles and the downstream process. The question what mesh size is required for gold ore after crushing is answered by gold mineralogy and the chosen extraction method. For gravity concentration (e.g., centrifugal concentrators, sluices), a crushed product of 2-4 mm (4-8 mesh) is typically sufficient. For cyanidation leaching, the crushed ore is usually sent to a ball mill, but if using heap leaching, the crushed size should be 12-25 mm (0.5-1 inch) – not mesh. For conventional milling (CIL/CIP), the final crusher product before grinding is typically 6-12 mm (about 2-6 mesh). OCP Machinery, with 40+ years of experience, helps gold miners determine the optimal crushing target. The what mesh size is required for gold ore after crushing for free-milling gold with coarse gold (>150 μm) can be as coarse as 6mm (3 mesh), while for fine-grained or refractory gold, crushing to 2mm (8 mesh) or finer may be needed.

In actual operation, OCP’s crushing circuits are designed to achieve a specific P80 (80% passing size). For a gold mine in Mali processing ore with gold liberation at 100 μm, OCP designed a three-stage crushing circuit to produce a P80 of 8mm (2.5 mesh). This allowed the ball mill to reduce from 8mm to 75 μm with lower energy. To answer what mesh size is required for gold ore after crushing for heap leaching, OCP recommends 12-25 mm (0.5-1 inch) to maintain permeability while exposing gold surfaces. For a customer in Nevada using agglomerated heap leaching, OCP’s cone crusher produced a 16mm product (1 mesh), achieving 78% gold recovery. OCP’s custom capability includes closed-circuit screening with woven wire or polyurethane screens to precisely control top size. Our direct factory pricing for crushers and screens saves 20-30% on the entire sizing circuit. Environmentally, finer crushing reduces the need for aggressive grinding, lowering energy consumption and associated emissions.

OCP’s 40 years of experience has compiled a gold ore crushing size database covering over 200 deposit types. When a miner asks what mesh size is required for gold ore after crushing, OCP conducts a simple crush-and-screen test on a representative sample. For a recent customer in Tanzania, the recommended size was 6mm (3 mesh) for their gravity/leach circuit, resulting in 92% recovery. To find out the optimal crushed size for your gold ore, contact OCP Machinery. Send us a 10kg sample or your mineralogy report. Our engineers will recommend the exact what mesh size is required for gold ore after crushing for your specific ore and process. Click the online chat button for 24/7 consultation. Request a free test report and a quotation for a crushing circuit tailored to your target size. Don’t over-crush or under-crush – get the right size with OCP.

(The technical parameters and pricing information mentioned in this article are subject to change as products are upgraded and are for reference only. Please contact customer service on the website for the latest equipment details.)