α 亚硝基 β 萘酚活化浮选氧化锌矿试验研究

采用α 亚硝基 β 萘酚为活化剂和十八胺为捕收剂对氧化锌矿石浮选,并考察其作用机理.结果表明,活化剂、捕收剂、分散剂的类型和用量是影响锌的品位和回收率的主要因素,α 亚硝基 β 萘酚是氧化锌矿石浮选的有效活化剂.用木质素磺酸钙作为分散剂,经α 亚硝基 β 萘酚活化后,在pH = 95时,锌的品位从初始等级的2230%达到了3826%,回收率达到8790%.红外光谱分析表明,在矿物表面α 亚硝基 β 萘酚和Zn2+配位通过Zn O键形成六元环,从而增强矿物表面的疏水性.
The flotation of oxidized zinc ore was investigated by using α nitroso β naphthol as activator and octadecylamine as collector.The results indicated that the dosage of the activator and collector，the type and content of dispersant were the main affecting factors on the Zn grade and recovery from zinc oxide ore.The artificial mixture flotation tests indicated that the grade of zinc was up to 3826% from the initial grade of 2230%，and the optimal flotation recovery was found at 8790% using calcium lignosulphonate as dispersant after activation with α nitroso β naphthol at pH 95It implied that α nitroso β naphthol was an effective activator for the flotation of oxidized zinc ore.The results of IR spectrum suggested that a six membered ring coordinated from O to Zn was formed between α nitroso β naphthol and Zn2+ on the mineral surface，resulting in the enhancement of the hydrophobicity of the mineral surface.