Lead Depression in Bulk Cu/Pb Flotation
A series of tests were completed with bulk copper and lead flotation with the depression of lead and flotation of copper. This alternative utilized MBS as the primary depressant in both the bulk and reverse circuits. The challenge of this scheme is that the lead concentrate will be the tailings of the reverse circuit and will likely […]
Clay Depressant
A Clay Depressant commonly used in South Africa to help produce a cleaner froth flotation concentrate is: Product: Oxfloat 108 Preparation: Make 1% solution in water. Add product to water into stirred beaker to prevent lumping. Allow sufficient time to dissolve. Dosage: Dosage varies widely depending on Clay content and ore characteristics. 30 – 150 g/t.
Fluorine Dispersion
In some cases, Mica carries Fluorine. If you can not pre-float that Mica, you may want to try the Fluorine Dispersant below. Product: Oxfloat 25P – Metaphosphate As a mining chemicals for flotation treatment of multi-metallic ores Preparation: Make 2% solution in water. Dissolves readily. Dosage for good dispersion: Dosage between 100 – 1000 g/t. Product: […]
MgO Talc Depression
Product: Oxfloat D100 is of the CMC family of depressant. With the purpose of MgO Depression, this is commonly used in Southern Africa for Talc depression in PGM/Nickel flotation circuits. Also known as SODIUM CARBOXYMETHYL CELLULOSE Preparation: Make 0.5% solution in water. Add product to water into stirred beaker to prevent lumping. Allow sufficient time to dissolve. […]
Diagnostic Gold Leach Testing
A Gold Diagnostic Leach Test is used to evaluate the distribution or deportment of gold in various minerals is determined by a series of selective leaches, usually by increasingly stronger oxidative acid leaches. Between each stage, cyanide leaching is used to extract the released gold. In this study a total of ten analysis stages were carried out for the […]
Types of Anionic Collectors of Sulphides
Collectors for sulphide minerals : Anionic collectors are most commonly used for sulphide minerals. By reference to the table (below) it will be note that they are all structurally similar, each having a single sulphur atom double bonded to either a carbon or phrosphorus atom, hence all of the sulphide minerals can be floated with […]
Cyanide Bottle Roll Leach Test – Leaching Procedures
List Equipment Required to Perform of a Standard Bottle Leach Test Winchester bottles, with tops Plastic tape to seal tops of bottles Flexible air lines for possible aeration requirements Magnetic or mechanical stirrer for agitation Timer, pH meter, thermometer and weighing device Leachants, i.e. acid, alkaline or neutral solutions, or specific solutions Filter: vacuum or […]
Sulphide Leaching
Methods of leaching sulphide ores can be: in absence of oxidizing agents in presence of oxidizing agents Bacterial leaching Absence of oxidizing agents Acid leaching: Dilute acids dissolve some metal sulphides with liberation of H2S, e.g. ZnS + 2H+ ^ Zn2+ + H2S Three types of sulphides can be encountered. Completely soluble sulphides: Zns, CoS, […]
Flotation Frothers – Frothing Agents
The next reagent that is added is the Flotation FROTHER. The frother strengthens the surface tension of the air that is injected into the flotation cell. As the air rises in the shape of bubbles, they come into contact with the mineral laden collector which attaches itself to the air. The bubble will continue to […]
Dry Polymers
Dry polymers are typically made down to 0.25% solutions by adding 0.5 grams of polymer to 200 mLs of water. Use the same water for laboratory solution preparation that will be used to prepare samples in actual plant situation. The recommended mixers for dry polymer are magnetic stirrer (with large 2 inch magnet), overhead mixer, […]