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Click to add WeChatThe mineral composition of nickel sulfide ore is complex and diverse, and the sulfide minerals are easy to oxidize and the gangue minerals are easy to mud, making ore dressing difficult. The flotation method is often used to complete the separation. During the flotation process, sulfide mineral collector, pH adjuster, and slurry dispersant are needed. , Silicate Mineral Inhibitors, (Magnetic) Pyrite Inhibitors, Nickel Mineral Inhibitors and Foaming agentsand other mineral processing agents, among which copper-nickel sulfide ore collectors and silicate mineral inhibitors are commonly used.
The commonly used collector types for nickel sulfide ore include xanthate type, black drug and thiocarbamate, among which xanthate such as ethyl xanthate, butyl xanthate, amyl xanthate, Y89, etc. are more commonly used , the most commonly used black medicine is butylammonium black medicine. Due to the advancement of mineral processing technology, researchers have developed a variety of new reagents, including BK series, A series, LP series, LX series, etc. However, among some of the collector agents mentioned above, the use of a single agent often cannot effectively recover nickel. If a mixture of agents is used, the advantages of different types of collectors can be fully utilized to ensure the collection performance while greatly improving the selectivity of the agents. , thereby improving flotation technical and economic indicators. For example, a certain copper-nickel sulfide ore flotation operation uses a mixed drug method of butyl xanthate + butylammonium black drug + Z200. In the end, the nickel concentrate recovery rate reached 79.8%.
In the flotation process of nickel sulfide ores, commonly used inhibitors are: Phosphate, cellulose, water glass, bean gum, starch several categories. Among them, sodium hexametaphosphate is a very common polymeric phosphate, which disperses and inhibits silicate minerals in nickel sulfide by forming a hydrophilic complex with Ca and Mg; the most common cellulose is sodium carboxymethyl cellulose. Its molecular weight is large, and its molecular structure contains a large number of hydrophilic groups such as -OH and -COOH, which has a strong inhibitory ability to silicate minerals. Water glass is a commonly used inhibitor of silicate minerals. In order to improve the inhibitory effect, it is often used Targeted modification is widely used in nickel sulfide ore flotation; bean gum mainly includes locust bean gum, guar gum and their modified products, which have outstanding inhibitory capabilities. The focus of modification research is Improve the selectivity of inhibition.
The above are the two types of chemicals commonly used in the process of nickel sulfide ore beneficiation. The specific selection and dosage of chemicals need to be determined according to Ore dressing test analysis to determine the recovery rate of the finishing nickel concentrator.
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