中文摘要：

通过单矿物浮选试验,考察了Gemini型捕收剂Gemini-31503和十二胺对石英和磁铁矿的浮选特性,结果表明,Gemini-31503在较宽的pH范围里对石英具有很强的捕收能力,并且对石英具有良好的选择性,其性能明显优于十二胺。用Gemini-31503对石英和磁铁矿的人工混合矿进行反浮选,在不需再添加其他任何药剂的情况下取得了良好的分选指标。动电位测定和红外光谱分析结果显示,Gemini-31503在两种矿物表面的吸附主要为静电吸附,且在相同条件下,Gemini-31503在石英表面的吸附量比在磁铁矿表面的吸附量大。

英文摘要：

Through the flotation tests of single mineral,the flotation performance of quartz and magnetite were investigated with Gemini collector Gemini-31503 and the lauryl amine as collector respectively.The results showed that Gemini collector 31503 had better collecting ability to quartz in a wide pH range and good selectivity in quartz,and its performance was much superior to the lauryl amine.With the Gemini-31503 used as collector,the reverse flotation tests on the artificial mixed ores of quartz and magnetite were made,obtaining good separation index without any other reagents added.The Zeta potential measurements and infrared spectroscopy results showed that Gemini-31503 adsorption on the two minerals surface is mainly electrostatic adsorption.Under the same conditions,Gemini-31503 adsorption on quartz surfaces is higher than that on the magnetite.