Nickel ore mainly includes: sulfide mineral collector, pH adjuster, pulp dispersant, silicate mineral inhibitor (magnetic) pyrite inhibitor, nickel mineral inhibitor and foaming agent, etc. The most commonly used ones are nickel sulfide ore collectors and silicate mineral inhibitors.
1. Nickel sulfide ore collector
Commonly used collectors for nickel sulfide ores include xanthate, black drug, and thiourethane. Among them, the commonly used xanthate types include ethyl xanthate, butyl xanthate, amyl xanthate, Y89, etc., and the commonly used black drug type is butyl ammonium black drug. In addition, there are also some new pharmaceuticals, such as BK series, A series, LP series, LX series, etc.
In the flotation process of nickel sulfide ore, the use of a single collector often fails to obtain ideal flotation indicators, and the use of mixed drugs can make up for each other's weaknesses. For example, the mixed use of butyl xanthate + butylammonium black drug + Z200 can give full play to the advantages of different types of collectors, greatly improving the selectivity of the agent while ensuring the collection performance, thereby improving the flotation of nickel sulfide ore. Select indicators.
2. Silicate mineral inhibitors
Commonly used inhibitors in nickel sulfide ore flotation include: polymeric phosphates, cellulose, water glass, soybean gum, starch, etc.
Polyphosphates: Mostly sodium hexametaphosphate is used to disperse and inhibit silicate minerals by forming hydrophilic complexes with Ca and Mg.
Cellulose: The most common one is sodium carboxymethyl cellulose, which has a large molecular weight and contains a large number of -OH, -COOH and other hydrophilic groups in its molecular structure, and has a strong ability to inhibit silicate minerals.
Water glass: Quartz and sodium carbonate are heated and fused to form a water glass sinter. When dissolved in water, a paste-like colloid is formed, which is a commonly used inhibitor for silicates.
Soybean gums: Locust bean gum, guar gum and their modified products have strong inhibitory capabilities.
The above are the commonly used flotation process methods and flotation reagent types for nickel ore beneficiation. In actual mineral processing plants, it is necessary to determine the appropriate flotation process and reagents.
