新型两性螯合捕收剂DJW-2捕收石英的性能

两性螯合捕收剂DJW-2是东北大学为改善磁选铁精矿反浮选脱硅效果而研制的新型捕收剂,为了解其捕收石英的性能,以石英纯矿物为浮选对象,进行了DJW-2用量、适宜的矿浆p H值、活化剂Ca Cl2用量、适宜的浮选温度试验。结果表明,在矿浆p H=9,DJW-2用量为750 mg/L,浮选温度为38~18℃情况下均可取得90%以上的回收率。进一步的Zeta电位检测和红外光谱分析表明,DJW-2在石英表面以氢键吸附和化学吸附为主。因此,DJW-2是磁选精矿反浮选脱硅的高效、低耗、强适应性捕收剂。

Study on Collecting Performance of a New Amphoteric Chelating Collector DJW-2 on Quartz

College of Resources and Civil Engineering, Northeastern University，Shenyang 110819，China The new amphoteric chelating collector DJW-2 was developed by Northeastern University to improve the effect of reverse flotation desilication in the magnetic separation concentrate. The tests on the dosage of DJW-2, optimum pH value of the pulp, the amount of calcium chloride and suitable flotation temperature were investigated to investigate the collecting performance on quartz, using pure mineral quartz as floating object. The result showed that when the pulp pH value was 9, dosage of DJW-2 was 750 mg/L, flotation temperature was between 38 and 18 ℃, the recovery rate could reach more than 90%.The further analysis on the zeta potential measurement and the infrared spectrum indicated that the dominated force that the DJW-2 on the surface of quartz were hydrogen boning adsorption and chemical adsorption. Therefore, the DJW-2 is a collector with high efficiency, low energy consumption and strong adaptability on reverse flotation desilication of concentrate of magnetic separation.