Sample Preparation MINTEK has a fully equipped sample preparation facility. Its function is to provide support for small-, medium-, or large-scale operations, both inside and outside Mintek, with respect to sample preparation. This includes crushing, milling and blending of samples. Facilities •Concrete drying pad for bulk sample drying and sorting – maximum capacity 2 000 t; •Pilot-scale crushing and screening plant, consisting of a 20 inch by 10 inch jaw crusher followed by a 2-foot Symons cone crusher in closed circuit with a vibrating screen. The maximum reduction ratio is from -150 mm to -6 mm; •A variety of small crushers are also available - jaw, roll, cone, and pulverisers for handling small samples up to 50 kg. Samples up to 2 t can be treated with jaw crushers and roll crushers; •Samples up to 200 kg can be blended using a double cone blender; and, •Larger samples up to 100 t have been blended using a layering technique similar to the stacker/reclaimer system used in industry. This technique is recommended for preparing representative feed for pilot plant campaigns. Facility Fine Grind Capacity •Grind ROM ores to below 38 μm; •Handle 3 tons per day; and, •All types of ores can be handled and processed in this facility. •In large-scale testwork, screen analysis can be carried out using large screens or a rotary trommel screen. Other Capabilities •In small-scale testwork, particle size can be determined using normal wet and dry screening techniques down to 38 mm. Sub-sieve sizing to produce size fractions for chemical analysis is performed using a Cyclosizer; •Particle density and bulk density of samples; •A Particle Size Analyser is used for size analysis down to 1 μm; •Ceramic and steel mills are available for dry batch milling; For further information contact Manager: Minerals Processing Division Tel: +27 11 709-4736 Fax: +27 11 709-4427 MPDmanager@mintek.co.za •Viscosity measurements; •Preparation of standard analytical samples; and, •Air classification. Note: Mintek is registered with the National Nuclear Regulator to process radioactive minerals such as uranium, thorium and monazite. Mintek 200 Malibongwe Drive, Randburg, South Africa Private Bag X3015, Randburg 2125, South Africa Tel: +27 11 709 4111 www.mintek.co.za