First Mining Drc-Zambia July/Aug 2019 First Mining DRC-ZAMBIA July-August 2019 digital | Page 23

Once at the surface, a froth layer supports the select minerals until they are removed. Unattached materials remain submerged in the pulp. selectively binds to the surface of target minerals and imparts hydrophobicity to those mineral particles, a necessary condition for air bubble attachment. The surface properties of a mineral determine its ability to float. Collectors, some of the most important flotation reagents used in the flotation process, are used to modify the surface properties of minerals. A collector is a chemical that Collectors can generally be classified into three categories – nonionic, anionic or cationic. Nonionic collectors are simple hydrocarbon oils. Anionic and cationic collectors consist of a polar component that selectively attaches SUN ACE: A global leader in the development and production of PVC Stabilisers and Metallic Soaps Sun Ace Group has grown into a leading global manufacturer with facilities and offices in Asia Pacific, Africa, Middle East and South America. The resultant company comprises of multicultural and diverse teams with global expertise, drawing on each other and thus enabling SUN ACE to expertly service the markets in which we operate. Sun Ace is recognised as a leading producer of PVC stabilisers and metallic soaps for many customers in the petrochemical, food, personal care, pharmaceutical, plastics and rubber, cement and coating industries around the world. Sun Ace South Africa and our joint venture partners, manufacture mining floatation reagent, namely xanthates, frothers and collectors. These are used for floatation of copper, gold, zinc, lead and other sulphide metallic ores. Sun Ace South Africa has technical resources to support technical solutions to the mines. Their quality chemical range include: Allyl Isobutyl Thionocarbamate a collector which is excellent in selectivity and separating performance for copper ores and copper-zinc sulphide ores. • Sodium Diisobutyl Dithiophosphate a collector in floating of copper, zinc, sulphides and precious metals with good selectivity. It is also a good suppressor of iron pyrites during alkali circuits. Preferable in multi- ore floatation. • Methyl Isobutyl Carbinol a frother. • Isopropyl Ethyl Thionocarbamate collector for flotation of copper, • to mineral surfaces, and a non-polar component that projects out into the solution making the surface hydrophobic. Collectors can either chemically bond to the mineral surface with high selectivity (chemisorption), or be held on the surface by physical forces (physical absorption). Collector selection is critical for effective mineral separation via froth flotation. • • • • • • • lead, zinc and molybdenum sulphides. Sodium Hydrosulphide for copper floatation. Potassium Isoamyl Xanthate a very strong Flotation chemical of sulphide metallic ore. Sodium Isobutyl Xanthate for flotation of sulphide metallic ore. Sodium Mercaptobenzothiazole a vulcanization accelerator in the rubber industry and collector in flotation of sulphide ore and some oxidized ores. Sodium Thioglycolate a flotation reagent which has the same effect as sodium cyanide to pyrite, copper, galena and molybdenum ores. Sodium Ethyl Xanthate for flotation of sulphide metallic ore. Sodium N-Propyl Xanthate used for flotation of sulphide metallic ore. Axis House supplies a full range of Flocculants in our Brontë Product Range of performance polymers for solid liquid seperation in alkaline and acid environments. For on-site testing, product selection, site optimisation and maximum metal recovery contact your Reagent Technology Management Experts [email protected] [phone] www.fmdrc-Zambia.com 21