用阳离子型捕收剂DYP反浮选铁矿物

Application of Cationic Collector DYP in Iron Ores Reverse Flotation

采用脂肪酸类阴离子捕收剂反浮选铁矿物,需要通过加温矿浆来保证其捕收性,不仅造成了能源的大量消耗,而且会对环境造成危害,为此东北大学研发了新型常温阳离子捕收剂DYP。为了研究其对铁矿物反浮选的分选效果,进行了石英、赤铁矿、磁铁矿单矿物及人工混合矿的浮选试验。结果显示:在捕收剂DYP体系中,3种单矿物的可浮性由强到弱依次为石英>赤铁矿>磁铁矿;DYP的用量为50 mg/L时,石英的回收率达到了97.33%,而赤铁矿和磁铁矿的回收率分别为6.50%、4.33%,说明捕收剂DYP具有很好的选择性,适合铁矿物反浮选。对捕收剂DYP在溶液中化学平衡、DYP对石英表面动电位及可浮性影响的分析表明,DYP对石英的捕收作用是静电吸附和氢键吸附协同作用的结果,且氢键作用强于静电吸附。

Using fatty acid anionic collector to float iron minerals requires pulp heated to ensure the collecting. It not only led to a large number of energy consumption but also will do harm to the environment. Thus,novel cationic collector DYP used in normal temperature was developed by Northeastern University. In order to study the reverse flotation separation effect on iron minerals,flotation experiments on single quartz,hematite,magnetite and artificial mixed minerals were conducted. The results indicated that：floatability of the three single minerals is as follows quartz＆gt;hematite＆gt;magnetite. The optimum dosage of DYP is 50 mg/L and the recovery rate of quartz is 97. 33%,while magnetite and hematite are 6. 50% and 4. 33%,respectively. DYP has good floatability and can be used in iron mineral reverse flotation. Analysis on chemical equilibrium of collector DYP in so-lution,zeta potential of quartz surface and floatability to DYP revealed that DYP collecting ability on quartz is the result of syn-ergy of both the electrostatic adsorption and hydrogen bonding adsorption,and hydrogen bonding interaction is stronger than that of the electrostatic adsorption.